hotspot/src/share/vm/opto/parse1.cpp
author shade
Thu, 25 Sep 2014 12:10:57 +0400
changeset 26913 9ad70cd32368
parent 25930 eae8b7490d2c
child 27637 cf68c0af6882
permissions -rw-r--r--
8058968: Compiler time traces should be improved Summary: Use CITime consistently, make C2 to report to CompilerBroker, more probes. Reviewed-by: vlivanov, jrose
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
     1
/*
24424
2658d7834c6e 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 23528
diff changeset
     2
 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
     3
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
489c9b5090e2 Initial load
duke
parents:
diff changeset
     4
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
     5
 * This code is free software; you can redistribute it and/or modify it
489c9b5090e2 Initial load
duke
parents:
diff changeset
     6
 * under the terms of the GNU General Public License version 2 only, as
489c9b5090e2 Initial load
duke
parents:
diff changeset
     7
 * published by the Free Software Foundation.
489c9b5090e2 Initial load
duke
parents:
diff changeset
     8
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
     9
 * This code is distributed in the hope that it will be useful, but WITHOUT
489c9b5090e2 Initial load
duke
parents:
diff changeset
    10
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
489c9b5090e2 Initial load
duke
parents:
diff changeset
    11
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
489c9b5090e2 Initial load
duke
parents:
diff changeset
    12
 * version 2 for more details (a copy is included in the LICENSE file that
489c9b5090e2 Initial load
duke
parents:
diff changeset
    13
 * accompanied this code).
489c9b5090e2 Initial load
duke
parents:
diff changeset
    14
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
    15
 * You should have received a copy of the GNU General Public License version
489c9b5090e2 Initial load
duke
parents:
diff changeset
    16
 * 2 along with this work; if not, write to the Free Software Foundation,
489c9b5090e2 Initial load
duke
parents:
diff changeset
    17
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    18
 *
5547
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 5333
diff changeset
    19
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 5333
diff changeset
    20
 * or visit www.oracle.com if you need additional information or have any
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 5333
diff changeset
    21
 * questions.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    22
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
    23
 */
489c9b5090e2 Initial load
duke
parents:
diff changeset
    24
7397
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5889
diff changeset
    25
#include "precompiled.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5889
diff changeset
    26
#include "compiler/compileLog.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5889
diff changeset
    27
#include "interpreter/linkResolver.hpp"
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13393
diff changeset
    28
#include "oops/method.hpp"
7397
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5889
diff changeset
    29
#include "opto/addnode.hpp"
23528
8f1a7f5e8066 8001532: C2 node files refactoring
morris
parents: 23491
diff changeset
    30
#include "opto/castnode.hpp"
7397
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5889
diff changeset
    31
#include "opto/idealGraphPrinter.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5889
diff changeset
    32
#include "opto/locknode.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5889
diff changeset
    33
#include "opto/memnode.hpp"
23528
8f1a7f5e8066 8001532: C2 node files refactoring
morris
parents: 23491
diff changeset
    34
#include "opto/opaquenode.hpp"
7397
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5889
diff changeset
    35
#include "opto/parse.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5889
diff changeset
    36
#include "opto/rootnode.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5889
diff changeset
    37
#include "opto/runtime.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5889
diff changeset
    38
#include "runtime/arguments.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5889
diff changeset
    39
#include "runtime/handles.inline.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5889
diff changeset
    40
#include "runtime/sharedRuntime.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5889
diff changeset
    41
#include "utilities/copy.hpp"
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    42
489c9b5090e2 Initial load
duke
parents:
diff changeset
    43
// Static array so we can figure out which bytecodes stop us from compiling
489c9b5090e2 Initial load
duke
parents:
diff changeset
    44
// the most. Some of the non-static variables are needed in bytecodeInfo.cpp
489c9b5090e2 Initial load
duke
parents:
diff changeset
    45
// and eventually should be encapsulated in a proper class (gri 8/18/98).
489c9b5090e2 Initial load
duke
parents:
diff changeset
    46
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
    47
int nodes_created              = 0;
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
    48
int methods_parsed             = 0;
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
    49
int methods_seen               = 0;
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
    50
int blocks_parsed              = 0;
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
    51
int blocks_seen                = 0;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    52
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
    53
int explicit_null_checks_inserted = 0;
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
    54
int explicit_null_checks_elided   = 0;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    55
int all_null_checks_found         = 0, implicit_null_checks              = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    56
int implicit_null_throws          = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    57
489c9b5090e2 Initial load
duke
parents:
diff changeset
    58
int reclaim_idx  = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    59
int reclaim_in   = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    60
int reclaim_node = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    61
489c9b5090e2 Initial load
duke
parents:
diff changeset
    62
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
    63
bool Parse::BytecodeParseHistogram::_initialized = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    64
uint Parse::BytecodeParseHistogram::_bytecodes_parsed [Bytecodes::number_of_codes];
489c9b5090e2 Initial load
duke
parents:
diff changeset
    65
uint Parse::BytecodeParseHistogram::_nodes_constructed[Bytecodes::number_of_codes];
489c9b5090e2 Initial load
duke
parents:
diff changeset
    66
uint Parse::BytecodeParseHistogram::_nodes_transformed[Bytecodes::number_of_codes];
489c9b5090e2 Initial load
duke
parents:
diff changeset
    67
uint Parse::BytecodeParseHistogram::_new_values       [Bytecodes::number_of_codes];
489c9b5090e2 Initial load
duke
parents:
diff changeset
    68
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
    69
489c9b5090e2 Initial load
duke
parents:
diff changeset
    70
//------------------------------print_statistics-------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
    71
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
    72
void Parse::print_statistics() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    73
  tty->print_cr("--- Compiler Statistics ---");
489c9b5090e2 Initial load
duke
parents:
diff changeset
    74
  tty->print("Methods seen: %d  Methods parsed: %d", methods_seen, methods_parsed);
489c9b5090e2 Initial load
duke
parents:
diff changeset
    75
  tty->print("  Nodes created: %d", nodes_created);
489c9b5090e2 Initial load
duke
parents:
diff changeset
    76
  tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
    77
  if (methods_seen != methods_parsed)
489c9b5090e2 Initial load
duke
parents:
diff changeset
    78
    tty->print_cr("Reasons for parse failures (NOT cumulative):");
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
    79
  tty->print_cr("Blocks parsed: %d  Blocks seen: %d", blocks_parsed, blocks_seen);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    80
489c9b5090e2 Initial load
duke
parents:
diff changeset
    81
  if( explicit_null_checks_inserted )
489c9b5090e2 Initial load
duke
parents:
diff changeset
    82
    tty->print_cr("%d original NULL checks - %d elided (%2d%%); optimizer leaves %d,", explicit_null_checks_inserted, explicit_null_checks_elided, (100*explicit_null_checks_elided)/explicit_null_checks_inserted, all_null_checks_found);
489c9b5090e2 Initial load
duke
parents:
diff changeset
    83
  if( all_null_checks_found )
489c9b5090e2 Initial load
duke
parents:
diff changeset
    84
    tty->print_cr("%d made implicit (%2d%%)", implicit_null_checks,
489c9b5090e2 Initial load
duke
parents:
diff changeset
    85
                  (100*implicit_null_checks)/all_null_checks_found);
489c9b5090e2 Initial load
duke
parents:
diff changeset
    86
  if( implicit_null_throws )
489c9b5090e2 Initial load
duke
parents:
diff changeset
    87
    tty->print_cr("%d implicit null exceptions at runtime",
489c9b5090e2 Initial load
duke
parents:
diff changeset
    88
                  implicit_null_throws);
489c9b5090e2 Initial load
duke
parents:
diff changeset
    89
489c9b5090e2 Initial load
duke
parents:
diff changeset
    90
  if( PrintParseStatistics && BytecodeParseHistogram::initialized() ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    91
    BytecodeParseHistogram::print();
489c9b5090e2 Initial load
duke
parents:
diff changeset
    92
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
    93
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
    94
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
    95
489c9b5090e2 Initial load
duke
parents:
diff changeset
    96
//------------------------------ON STACK REPLACEMENT---------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
    97
489c9b5090e2 Initial load
duke
parents:
diff changeset
    98
// Construct a node which can be used to get incoming state for
489c9b5090e2 Initial load
duke
parents:
diff changeset
    99
// on stack replacement.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   100
Node *Parse::fetch_interpreter_state(int index,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   101
                                     BasicType bt,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   102
                                     Node *local_addrs,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   103
                                     Node *local_addrs_base) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   104
  Node *mem = memory(Compile::AliasIdxRaw);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   105
  Node *adr = basic_plus_adr( local_addrs_base, local_addrs, -index*wordSize );
5889
13152be884e5 6959430: Make sure raw loads have control edge
kvn
parents: 5547
diff changeset
   106
  Node *ctl = control();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   107
489c9b5090e2 Initial load
duke
parents:
diff changeset
   108
  // Very similar to LoadNode::make, except we handle un-aligned longs and
489c9b5090e2 Initial load
duke
parents:
diff changeset
   109
  // doubles on Sparc.  Intel can handle them just fine directly.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   110
  Node *l;
22845
d8812d0ff387 8024921: PPC64 (part 113): Extend Load and Store nodes to know about memory ordering
goetz
parents: 21099
diff changeset
   111
  switch (bt) {                // Signature is flattened
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   112
  case T_INT:     l = new LoadINode(ctl, mem, adr, TypeRawPtr::BOTTOM, TypeInt::INT,        MemNode::unordered); break;
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   113
  case T_FLOAT:   l = new LoadFNode(ctl, mem, adr, TypeRawPtr::BOTTOM, Type::FLOAT,         MemNode::unordered); break;
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   114
  case T_ADDRESS: l = new LoadPNode(ctl, mem, adr, TypeRawPtr::BOTTOM, TypeRawPtr::BOTTOM,  MemNode::unordered); break;
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   115
  case T_OBJECT:  l = new LoadPNode(ctl, mem, adr, TypeRawPtr::BOTTOM, TypeInstPtr::BOTTOM, MemNode::unordered); break;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   116
  case T_LONG:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   117
  case T_DOUBLE: {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   118
    // Since arguments are in reverse order, the argument address 'adr'
489c9b5090e2 Initial load
duke
parents:
diff changeset
   119
    // refers to the back half of the long/double.  Recompute adr.
22845
d8812d0ff387 8024921: PPC64 (part 113): Extend Load and Store nodes to know about memory ordering
goetz
parents: 21099
diff changeset
   120
    adr = basic_plus_adr(local_addrs_base, local_addrs, -(index+1)*wordSize);
d8812d0ff387 8024921: PPC64 (part 113): Extend Load and Store nodes to know about memory ordering
goetz
parents: 21099
diff changeset
   121
    if (Matcher::misaligned_doubles_ok) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   122
      l = (bt == T_DOUBLE)
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   123
        ? (Node*)new LoadDNode(ctl, mem, adr, TypeRawPtr::BOTTOM, Type::DOUBLE, MemNode::unordered)
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   124
        : (Node*)new LoadLNode(ctl, mem, adr, TypeRawPtr::BOTTOM, TypeLong::LONG, MemNode::unordered);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   125
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   126
      l = (bt == T_DOUBLE)
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   127
        ? (Node*)new LoadD_unalignedNode(ctl, mem, adr, TypeRawPtr::BOTTOM, MemNode::unordered)
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   128
        : (Node*)new LoadL_unalignedNode(ctl, mem, adr, TypeRawPtr::BOTTOM, MemNode::unordered);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   129
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   130
    break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   131
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   132
  default: ShouldNotReachHere();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   133
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   134
  return _gvn.transform(l);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   135
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   136
489c9b5090e2 Initial load
duke
parents:
diff changeset
   137
// Helper routine to prevent the interpreter from handing
489c9b5090e2 Initial load
duke
parents:
diff changeset
   138
// unexpected typestate to an OSR method.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   139
// The Node l is a value newly dug out of the interpreter frame.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   140
// The type is the type predicted by ciTypeFlow.  Note that it is
489c9b5090e2 Initial load
duke
parents:
diff changeset
   141
// not a general type, but can only come from Type::get_typeflow_type.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   142
// The safepoint is a map which will feed an uncommon trap.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   143
Node* Parse::check_interpreter_type(Node* l, const Type* type,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   144
                                    SafePointNode* &bad_type_exit) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   145
489c9b5090e2 Initial load
duke
parents:
diff changeset
   146
  const TypeOopPtr* tp = type->isa_oopptr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   147
489c9b5090e2 Initial load
duke
parents:
diff changeset
   148
  // TypeFlow may assert null-ness if a type appears unloaded.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   149
  if (type == TypePtr::NULL_PTR ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
   150
      (tp != NULL && !tp->klass()->is_loaded())) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   151
    // Value must be null, not a real oop.
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   152
    Node* chk = _gvn.transform( new CmpPNode(l, null()) );
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   153
    Node* tst = _gvn.transform( new BoolNode(chk, BoolTest::eq) );
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   154
    IfNode* iff = create_and_map_if(control(), tst, PROB_MAX, COUNT_UNKNOWN);
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   155
    set_control(_gvn.transform( new IfTrueNode(iff) ));
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   156
    Node* bad_type = _gvn.transform( new IfFalseNode(iff) );
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   157
    bad_type_exit->control()->add_req(bad_type);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   158
    l = null();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   159
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   160
489c9b5090e2 Initial load
duke
parents:
diff changeset
   161
  // Typeflow can also cut off paths from the CFG, based on
489c9b5090e2 Initial load
duke
parents:
diff changeset
   162
  // types which appear unloaded, or call sites which appear unlinked.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   163
  // When paths are cut off, values at later merge points can rise
489c9b5090e2 Initial load
duke
parents:
diff changeset
   164
  // toward more specific classes.  Make sure these specific classes
489c9b5090e2 Initial load
duke
parents:
diff changeset
   165
  // are still in effect.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   166
  if (tp != NULL && tp->klass() != C->env()->Object_klass()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   167
    // TypeFlow asserted a specific object type.  Value must have that type.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   168
    Node* bad_type_ctrl = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   169
    l = gen_checkcast(l, makecon(TypeKlassPtr::make(tp->klass())), &bad_type_ctrl);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   170
    bad_type_exit->control()->add_req(bad_type_ctrl);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   171
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   172
489c9b5090e2 Initial load
duke
parents:
diff changeset
   173
  BasicType bt_l = _gvn.type(l)->basic_type();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   174
  BasicType bt_t = type->basic_type();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   175
  assert(_gvn.type(l)->higher_equal(type), "must constrain OSR typestate");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   176
  return l;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   177
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   178
489c9b5090e2 Initial load
duke
parents:
diff changeset
   179
// Helper routine which sets up elements of the initial parser map when
489c9b5090e2 Initial load
duke
parents:
diff changeset
   180
// performing a parse for on stack replacement.  Add values into map.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   181
// The only parameter contains the address of a interpreter arguments.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   182
void Parse::load_interpreter_state(Node* osr_buf) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   183
  int index;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   184
  int max_locals = jvms()->loc_size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   185
  int max_stack  = jvms()->stk_size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   186
489c9b5090e2 Initial load
duke
parents:
diff changeset
   187
489c9b5090e2 Initial load
duke
parents:
diff changeset
   188
  // Mismatch between method and jvms can occur since map briefly held
489c9b5090e2 Initial load
duke
parents:
diff changeset
   189
  // an OSR entry state (which takes up one RawPtr word).
489c9b5090e2 Initial load
duke
parents:
diff changeset
   190
  assert(max_locals == method()->max_locals(), "sanity");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   191
  assert(max_stack  >= method()->max_stack(),  "sanity");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   192
  assert((int)jvms()->endoff() == TypeFunc::Parms + max_locals + max_stack, "sanity");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   193
  assert((int)jvms()->endoff() == (int)map()->req(), "sanity");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   194
489c9b5090e2 Initial load
duke
parents:
diff changeset
   195
  // Find the start block.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   196
  Block* osr_block = start_block();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   197
  assert(osr_block->start() == osr_bci(), "sanity");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   198
489c9b5090e2 Initial load
duke
parents:
diff changeset
   199
  // Set initial BCI.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   200
  set_parse_bci(osr_block->start());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   201
489c9b5090e2 Initial load
duke
parents:
diff changeset
   202
  // Set initial stack depth.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   203
  set_sp(osr_block->start_sp());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   204
489c9b5090e2 Initial load
duke
parents:
diff changeset
   205
  // Check bailouts.  We currently do not perform on stack replacement
489c9b5090e2 Initial load
duke
parents:
diff changeset
   206
  // of loops in catch blocks or loops which branch with a non-empty stack.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   207
  if (sp() != 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   208
    C->record_method_not_compilable("OSR starts with non-empty stack");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   209
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   210
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   211
  // Do not OSR inside finally clauses:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   212
  if (osr_block->has_trap_at(osr_block->start())) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   213
    C->record_method_not_compilable("OSR starts with an immediate trap");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   214
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   215
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   216
489c9b5090e2 Initial load
duke
parents:
diff changeset
   217
  // Commute monitors from interpreter frame to compiler frame.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   218
  assert(jvms()->monitor_depth() == 0, "should be no active locks at beginning of osr");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   219
  int mcnt = osr_block->flow()->monitor_count();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   220
  Node *monitors_addr = basic_plus_adr(osr_buf, osr_buf, (max_locals+mcnt*2-1)*wordSize);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   221
  for (index = 0; index < mcnt; index++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   222
    // Make a BoxLockNode for the monitor.
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   223
    Node *box = _gvn.transform(new BoxLockNode(next_monitor()));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   224
489c9b5090e2 Initial load
duke
parents:
diff changeset
   225
489c9b5090e2 Initial load
duke
parents:
diff changeset
   226
    // Displaced headers and locked objects are interleaved in the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   227
    // temp OSR buffer.  We only copy the locked objects out here.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   228
    // Fetch the locked object from the OSR temp buffer and copy to our fastlock node.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   229
    Node *lock_object = fetch_interpreter_state(index*2, T_OBJECT, monitors_addr, osr_buf);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   230
    // Try and copy the displaced header to the BoxNode
489c9b5090e2 Initial load
duke
parents:
diff changeset
   231
    Node *displaced_hdr = fetch_interpreter_state((index*2) + 1, T_ADDRESS, monitors_addr, osr_buf);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   232
489c9b5090e2 Initial load
duke
parents:
diff changeset
   233
22845
d8812d0ff387 8024921: PPC64 (part 113): Extend Load and Store nodes to know about memory ordering
goetz
parents: 21099
diff changeset
   234
    store_to_memory(control(), box, displaced_hdr, T_ADDRESS, Compile::AliasIdxRaw, MemNode::unordered);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   235
489c9b5090e2 Initial load
duke
parents:
diff changeset
   236
    // Build a bogus FastLockNode (no code will be generated) and push the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   237
    // monitor into our debug info.
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   238
    const FastLockNode *flock = _gvn.transform(new FastLockNode( 0, lock_object, box ))->as_FastLock();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   239
    map()->push_monitor(flock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   240
489c9b5090e2 Initial load
duke
parents:
diff changeset
   241
    // If the lock is our method synchronization lock, tuck it away in
489c9b5090e2 Initial load
duke
parents:
diff changeset
   242
    // _sync_lock for return and rethrow exit paths.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   243
    if (index == 0 && method()->is_synchronized()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   244
      _synch_lock = flock;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   245
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   246
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   247
3910
67050ceda719 6854812: 6.0_14-b08 crashes with a SIGSEGV
never
parents: 3261
diff changeset
   248
  // Use the raw liveness computation to make sure that unexpected
67050ceda719 6854812: 6.0_14-b08 crashes with a SIGSEGV
never
parents: 3261
diff changeset
   249
  // values don't propagate into the OSR frame.
4440
e53e962bd403 6892079: live value must not be garbage failure after fix for 6854812
never
parents: 3910
diff changeset
   250
  MethodLivenessResult live_locals = method()->liveness_at_bci(osr_bci());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   251
  if (!live_locals.is_valid()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   252
    // Degenerate or breakpointed method.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   253
    C->record_method_not_compilable("OSR in empty or breakpointed method");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   254
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   255
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   256
489c9b5090e2 Initial load
duke
parents:
diff changeset
   257
  // Extract the needed locals from the interpreter frame.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   258
  Node *locals_addr = basic_plus_adr(osr_buf, osr_buf, (max_locals-1)*wordSize);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   259
489c9b5090e2 Initial load
duke
parents:
diff changeset
   260
  // find all the locals that the interpreter thinks contain live oops
489c9b5090e2 Initial load
duke
parents:
diff changeset
   261
  const BitMap live_oops = method()->live_local_oops_at_bci(osr_bci());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   262
  for (index = 0; index < max_locals; index++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   263
489c9b5090e2 Initial load
duke
parents:
diff changeset
   264
    if (!live_locals.at(index)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   265
      continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   266
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   267
489c9b5090e2 Initial load
duke
parents:
diff changeset
   268
    const Type *type = osr_block->local_type_at(index);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   269
489c9b5090e2 Initial load
duke
parents:
diff changeset
   270
    if (type->isa_oopptr() != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   271
489c9b5090e2 Initial load
duke
parents:
diff changeset
   272
      // 6403625: Verify that the interpreter oopMap thinks that the oop is live
489c9b5090e2 Initial load
duke
parents:
diff changeset
   273
      // else we might load a stale oop if the MethodLiveness disagrees with the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   274
      // result of the interpreter. If the interpreter says it is dead we agree
489c9b5090e2 Initial load
duke
parents:
diff changeset
   275
      // by making the value go to top.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   276
      //
489c9b5090e2 Initial load
duke
parents:
diff changeset
   277
489c9b5090e2 Initial load
duke
parents:
diff changeset
   278
      if (!live_oops.at(index)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   279
        if (C->log() != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   280
          C->log()->elem("OSR_mismatch local_index='%d'",index);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   281
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   282
        set_local(index, null());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   283
        // and ignore it for the loads
489c9b5090e2 Initial load
duke
parents:
diff changeset
   284
        continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   285
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   286
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   287
489c9b5090e2 Initial load
duke
parents:
diff changeset
   288
    // Filter out TOP, HALF, and BOTTOM.  (Cf. ensure_phi.)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   289
    if (type == Type::TOP || type == Type::HALF) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   290
      continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   291
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   292
    // If the type falls to bottom, then this must be a local that
489c9b5090e2 Initial load
duke
parents:
diff changeset
   293
    // is mixing ints and oops or some such.  Forcing it to top
489c9b5090e2 Initial load
duke
parents:
diff changeset
   294
    // makes it go dead.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   295
    if (type == Type::BOTTOM) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   296
      continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   297
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   298
    // Construct code to access the appropriate local.
5333
bb01e3adecb4 6938026: C2 compiler fails in Node::rematerialize()const
never
parents: 5228
diff changeset
   299
    BasicType bt = type->basic_type();
bb01e3adecb4 6938026: C2 compiler fails in Node::rematerialize()const
never
parents: 5228
diff changeset
   300
    if (type == TypePtr::NULL_PTR) {
bb01e3adecb4 6938026: C2 compiler fails in Node::rematerialize()const
never
parents: 5228
diff changeset
   301
      // Ptr types are mixed together with T_ADDRESS but NULL is
bb01e3adecb4 6938026: C2 compiler fails in Node::rematerialize()const
never
parents: 5228
diff changeset
   302
      // really for T_OBJECT types so correct it.
bb01e3adecb4 6938026: C2 compiler fails in Node::rematerialize()const
never
parents: 5228
diff changeset
   303
      bt = T_OBJECT;
bb01e3adecb4 6938026: C2 compiler fails in Node::rematerialize()const
never
parents: 5228
diff changeset
   304
    }
bb01e3adecb4 6938026: C2 compiler fails in Node::rematerialize()const
never
parents: 5228
diff changeset
   305
    Node *value = fetch_interpreter_state(index, bt, locals_addr, osr_buf);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   306
    set_local(index, value);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   307
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   308
489c9b5090e2 Initial load
duke
parents:
diff changeset
   309
  // Extract the needed stack entries from the interpreter frame.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   310
  for (index = 0; index < sp(); index++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   311
    const Type *type = osr_block->stack_type_at(index);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   312
    if (type != Type::TOP) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   313
      // Currently the compiler bails out when attempting to on stack replace
489c9b5090e2 Initial load
duke
parents:
diff changeset
   314
      // at a bci with a non-empty stack.  We should not reach here.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   315
      ShouldNotReachHere();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   316
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   317
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   318
489c9b5090e2 Initial load
duke
parents:
diff changeset
   319
  // End the OSR migration
489c9b5090e2 Initial load
duke
parents:
diff changeset
   320
  make_runtime_call(RC_LEAF, OptoRuntime::osr_end_Type(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   321
                    CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_end),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   322
                    "OSR_migration_end", TypeRawPtr::BOTTOM,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   323
                    osr_buf);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   324
489c9b5090e2 Initial load
duke
parents:
diff changeset
   325
  // Now that the interpreter state is loaded, make sure it will match
489c9b5090e2 Initial load
duke
parents:
diff changeset
   326
  // at execution time what the compiler is expecting now:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   327
  SafePointNode* bad_type_exit = clone_map();
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   328
  bad_type_exit->set_control(new RegionNode(1));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   329
5029
cc2198aa63cb 6915557: assert(_gvn.type(l)->higher_equal(type),"must constrain OSR typestate") with debug build
never
parents: 4905
diff changeset
   330
  assert(osr_block->flow()->jsrs()->size() == 0, "should be no jsrs live at osr point");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   331
  for (index = 0; index < max_locals; index++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   332
    if (stopped())  break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   333
    Node* l = local(index);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   334
    if (l->is_top())  continue;  // nothing here
489c9b5090e2 Initial load
duke
parents:
diff changeset
   335
    const Type *type = osr_block->local_type_at(index);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   336
    if (type->isa_oopptr() != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   337
      if (!live_oops.at(index)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   338
        // skip type check for dead oops
489c9b5090e2 Initial load
duke
parents:
diff changeset
   339
        continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   340
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   341
    }
5032
785da8592568 6930398: fix for return address locals in OSR entries uses wrong test
never
parents: 5029
diff changeset
   342
    if (osr_block->flow()->local_type_at(index)->is_return_address()) {
5029
cc2198aa63cb 6915557: assert(_gvn.type(l)->higher_equal(type),"must constrain OSR typestate") with debug build
never
parents: 4905
diff changeset
   343
      // In our current system it's illegal for jsr addresses to be
cc2198aa63cb 6915557: assert(_gvn.type(l)->higher_equal(type),"must constrain OSR typestate") with debug build
never
parents: 4905
diff changeset
   344
      // live into an OSR entry point because the compiler performs
cc2198aa63cb 6915557: assert(_gvn.type(l)->higher_equal(type),"must constrain OSR typestate") with debug build
never
parents: 4905
diff changeset
   345
      // inlining of jsrs.  ciTypeFlow has a bailout that detect this
cc2198aa63cb 6915557: assert(_gvn.type(l)->higher_equal(type),"must constrain OSR typestate") with debug build
never
parents: 4905
diff changeset
   346
      // case and aborts the compile if addresses are live into an OSR
cc2198aa63cb 6915557: assert(_gvn.type(l)->higher_equal(type),"must constrain OSR typestate") with debug build
never
parents: 4905
diff changeset
   347
      // entry point.  Because of that we can assume that any address
cc2198aa63cb 6915557: assert(_gvn.type(l)->higher_equal(type),"must constrain OSR typestate") with debug build
never
parents: 4905
diff changeset
   348
      // locals at the OSR entry point are dead.  Method liveness
cc2198aa63cb 6915557: assert(_gvn.type(l)->higher_equal(type),"must constrain OSR typestate") with debug build
never
parents: 4905
diff changeset
   349
      // isn't precise enought to figure out that they are dead in all
cc2198aa63cb 6915557: assert(_gvn.type(l)->higher_equal(type),"must constrain OSR typestate") with debug build
never
parents: 4905
diff changeset
   350
      // cases so simply skip checking address locals all
cc2198aa63cb 6915557: assert(_gvn.type(l)->higher_equal(type),"must constrain OSR typestate") with debug build
never
parents: 4905
diff changeset
   351
      // together. Any type check is guaranteed to fail since the
cc2198aa63cb 6915557: assert(_gvn.type(l)->higher_equal(type),"must constrain OSR typestate") with debug build
never
parents: 4905
diff changeset
   352
      // interpreter type is the result of a load which might have any
cc2198aa63cb 6915557: assert(_gvn.type(l)->higher_equal(type),"must constrain OSR typestate") with debug build
never
parents: 4905
diff changeset
   353
      // value and the expected type is a constant.
4440
e53e962bd403 6892079: live value must not be garbage failure after fix for 6854812
never
parents: 3910
diff changeset
   354
      continue;
e53e962bd403 6892079: live value must not be garbage failure after fix for 6854812
never
parents: 3910
diff changeset
   355
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   356
    set_local(index, check_interpreter_type(l, type, bad_type_exit));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   357
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   358
489c9b5090e2 Initial load
duke
parents:
diff changeset
   359
  for (index = 0; index < sp(); index++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   360
    if (stopped())  break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   361
    Node* l = stack(index);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   362
    if (l->is_top())  continue;  // nothing here
489c9b5090e2 Initial load
duke
parents:
diff changeset
   363
    const Type *type = osr_block->stack_type_at(index);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   364
    set_stack(index, check_interpreter_type(l, type, bad_type_exit));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   365
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   366
489c9b5090e2 Initial load
duke
parents:
diff changeset
   367
  if (bad_type_exit->control()->req() > 1) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   368
    // Build an uncommon trap here, if any inputs can be unexpected.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   369
    bad_type_exit->set_control(_gvn.transform( bad_type_exit->control() ));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   370
    record_for_igvn(bad_type_exit->control());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   371
    SafePointNode* types_are_good = map();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   372
    set_map(bad_type_exit);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   373
    // The unexpected type happens because a new edge is active
489c9b5090e2 Initial load
duke
parents:
diff changeset
   374
    // in the CFG, which typeflow had previously ignored.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   375
    // E.g., Object x = coldAtFirst() && notReached()? "str": new Integer(123).
489c9b5090e2 Initial load
duke
parents:
diff changeset
   376
    // This x will be typed as Integer if notReached is not yet linked.
13931
37366c0290fc 7199742: A lot of C2 OSR compilations of the same method's bci
kvn
parents: 13895
diff changeset
   377
    // It could also happen due to a problem in ciTypeFlow analysis.
37366c0290fc 7199742: A lot of C2 OSR compilations of the same method's bci
kvn
parents: 13895
diff changeset
   378
    uncommon_trap(Deoptimization::Reason_constraint,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   379
                  Deoptimization::Action_reinterpret);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   380
    set_map(types_are_good);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   381
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   382
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   383
489c9b5090e2 Initial load
duke
parents:
diff changeset
   384
//------------------------------Parse------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   385
// Main parser constructor.
24946
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
   386
Parse::Parse(JVMState* caller, ciMethod* parse_method, float expected_uses)
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
   387
  : _exits(caller)
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   388
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   389
  // Init some variables
489c9b5090e2 Initial load
duke
parents:
diff changeset
   390
  _caller = caller;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   391
  _method = parse_method;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   392
  _expected_uses = expected_uses;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   393
  _depth = 1 + (caller->has_method() ? caller->depth() : 0);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   394
  _wrote_final = false;
22868
7f6eb436873b 8029101: PPC64 (part 211): ordering of Independent Reads of Independent Writes
goetz
parents: 22845
diff changeset
   395
  _wrote_volatile = false;
23190
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   396
  _wrote_stable = false;
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   397
  _wrote_fields = false;
17383
3665c0901a0d 6934604: enable parts of EliminateAutoBox by default
kvn
parents: 15118
diff changeset
   398
  _alloc_with_final = NULL;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   399
  _entry_bci = InvocationEntryBci;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   400
  _tf = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   401
  _block = NULL;
24946
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
   402
  _first_return = true;
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
   403
  _replaced_nodes_for_exceptions = false;
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
   404
  _new_idx = C->unique();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   405
  debug_only(_block_count = -1);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   406
  debug_only(_blocks = (Block*)-1);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   407
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   408
  if (PrintCompilation || PrintOpto) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   409
    // Make sure I have an inline tree, so I can print messages about it.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   410
    JVMState* ilt_caller = is_osr_parse() ? caller->caller() : caller;
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 11458
diff changeset
   411
    InlineTree::find_subtree_from_root(C->ilt(), ilt_caller, parse_method);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   412
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   413
  _max_switch_depth = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   414
  _est_switch_depth = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   415
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   416
489c9b5090e2 Initial load
duke
parents:
diff changeset
   417
  _tf = TypeFunc::make(method());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   418
  _iter.reset_to_method(method());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   419
  _flow = method()->get_flow_analysis();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   420
  if (_flow->failing()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   421
    C->record_method_not_compilable_all_tiers(_flow->failure_reason());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   422
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   423
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   424
#ifndef PRODUCT
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   425
  if (_flow->has_irreducible_entry()) {
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   426
    C->set_parsed_irreducible_loop(true);
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   427
  }
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   428
#endif
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   429
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   430
  if (_expected_uses <= 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   431
    _prof_factor = 1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   432
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   433
    float prof_total = parse_method->interpreter_invocation_count();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   434
    if (prof_total <= _expected_uses) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   435
      _prof_factor = 1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   436
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   437
      _prof_factor = _expected_uses / prof_total;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   438
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   439
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   440
489c9b5090e2 Initial load
duke
parents:
diff changeset
   441
  CompileLog* log = C->log();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   442
  if (log != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   443
    log->begin_head("parse method='%d' uses='%g'",
489c9b5090e2 Initial load
duke
parents:
diff changeset
   444
                    log->identify(parse_method), expected_uses);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   445
    if (depth() == 1 && C->is_osr_compilation()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   446
      log->print(" osr_bci='%d'", C->entry_bci());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   447
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   448
    log->stamp();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   449
    log->end_head();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   450
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   451
489c9b5090e2 Initial load
duke
parents:
diff changeset
   452
  // Accumulate deoptimization counts.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   453
  // (The range_check and store_check counts are checked elsewhere.)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   454
  ciMethodData* md = method()->method_data();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   455
  for (uint reason = 0; reason < md->trap_reason_limit(); reason++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   456
    uint md_count = md->trap_count(reason);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   457
    if (md_count != 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   458
      if (md_count == md->trap_count_limit())
489c9b5090e2 Initial load
duke
parents:
diff changeset
   459
        md_count += md->overflow_trap_count();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   460
      uint total_count = C->trap_count(reason);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   461
      uint old_count   = total_count;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   462
      total_count += md_count;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   463
      // Saturate the add if it overflows.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   464
      if (total_count < old_count || total_count < md_count)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   465
        total_count = (uint)-1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   466
      C->set_trap_count(reason, total_count);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   467
      if (log != NULL)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   468
        log->elem("observe trap='%s' count='%d' total='%d'",
489c9b5090e2 Initial load
duke
parents:
diff changeset
   469
                  Deoptimization::trap_reason_name(reason),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   470
                  md_count, total_count);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   471
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   472
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   473
  // Accumulate total sum of decompilations, also.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   474
  C->set_decompile_count(C->decompile_count() + md->decompile_count());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   475
489c9b5090e2 Initial load
duke
parents:
diff changeset
   476
  _count_invocations = C->do_count_invocations();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   477
  _method_data_update = C->do_method_data_update();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   478
489c9b5090e2 Initial load
duke
parents:
diff changeset
   479
  if (log != NULL && method()->has_exception_handlers()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   480
    log->elem("observe that='has_exception_handlers'");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   481
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   482
489c9b5090e2 Initial load
duke
parents:
diff changeset
   483
  assert(method()->can_be_compiled(),       "Can not parse this method, cutout earlier");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   484
  assert(method()->has_balanced_monitors(), "Can not parse unbalanced monitors, cutout earlier");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   485
489c9b5090e2 Initial load
duke
parents:
diff changeset
   486
  // Always register dependence if JVMTI is enabled, because
489c9b5090e2 Initial load
duke
parents:
diff changeset
   487
  // either breakpoint setting or hotswapping of methods may
489c9b5090e2 Initial load
duke
parents:
diff changeset
   488
  // cause deoptimization.
2867
69187054225f 6788527: Server vm intermittently fails with assertion "live value must not be garbage" with fastdebug bits
kvn
parents: 2570
diff changeset
   489
  if (C->env()->jvmti_can_hotswap_or_post_breakpoint()) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   490
    C->dependencies()->assert_evol_method(method());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   491
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   492
489c9b5090e2 Initial load
duke
parents:
diff changeset
   493
  methods_seen++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   494
489c9b5090e2 Initial load
duke
parents:
diff changeset
   495
  // Do some special top-level things.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   496
  if (depth() == 1 && C->is_osr_compilation()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   497
    _entry_bci = C->entry_bci();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   498
    _flow = method()->get_osr_flow_analysis(osr_bci());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   499
    if (_flow->failing()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   500
      C->record_method_not_compilable(_flow->failure_reason());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   501
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   502
      if (PrintOpto && (Verbose || WizardMode)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   503
        tty->print_cr("OSR @%d type flow bailout: %s", _entry_bci, _flow->failure_reason());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   504
        if (Verbose) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13393
diff changeset
   505
          method()->print();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   506
          method()->print_codes();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   507
          _flow->print();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   508
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   509
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   510
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   511
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   512
    _tf = C->tf();     // the OSR entry type is different
489c9b5090e2 Initial load
duke
parents:
diff changeset
   513
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   514
489c9b5090e2 Initial load
duke
parents:
diff changeset
   515
#ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   516
  if (depth() == 1) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   517
    assert(C->is_osr_compilation() == this->is_osr_parse(), "OSR in sync");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   518
    if (C->tf() != tf()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   519
      MutexLockerEx ml(Compile_lock, Mutex::_no_safepoint_check_flag);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   520
      assert(C->env()->system_dictionary_modification_counter_changed(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   521
             "Must invalidate if TypeFuncs differ");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   522
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   523
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   524
    assert(!this->is_osr_parse(), "no recursive OSR");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   525
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   526
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   527
489c9b5090e2 Initial load
duke
parents:
diff changeset
   528
  methods_parsed++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   529
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   530
  // add method size here to guarantee that inlined methods are added too
26913
9ad70cd32368 8058968: Compiler time traces should be improved
shade
parents: 25930
diff changeset
   531
  if (CITime)
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   532
    _total_bytes_compiled += method()->code_size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   533
489c9b5090e2 Initial load
duke
parents:
diff changeset
   534
  show_parse_info();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   535
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   536
489c9b5090e2 Initial load
duke
parents:
diff changeset
   537
  if (failing()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   538
    if (log)  log->done("parse");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   539
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   540
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   541
489c9b5090e2 Initial load
duke
parents:
diff changeset
   542
  gvn().set_type(root(), root()->bottom_type());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   543
  gvn().transform(top());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   544
489c9b5090e2 Initial load
duke
parents:
diff changeset
   545
  // Import the results of the ciTypeFlow.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   546
  init_blocks();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   547
489c9b5090e2 Initial load
duke
parents:
diff changeset
   548
  // Merge point for all normal exits
489c9b5090e2 Initial load
duke
parents:
diff changeset
   549
  build_exits();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   550
489c9b5090e2 Initial load
duke
parents:
diff changeset
   551
  // Setup the initial JVM state map.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   552
  SafePointNode* entry_map = create_entry_map();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   553
489c9b5090e2 Initial load
duke
parents:
diff changeset
   554
  // Check for bailouts during map initialization
489c9b5090e2 Initial load
duke
parents:
diff changeset
   555
  if (failing() || entry_map == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   556
    if (log)  log->done("parse");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   557
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   558
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   559
489c9b5090e2 Initial load
duke
parents:
diff changeset
   560
  Node_Notes* caller_nn = C->default_node_notes();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   561
  // Collect debug info for inlined calls unless -XX:-DebugInlinedCalls.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   562
  if (DebugInlinedCalls || depth() == 1) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   563
    C->set_default_node_notes(make_node_notes(caller_nn));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   564
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   565
489c9b5090e2 Initial load
duke
parents:
diff changeset
   566
  if (is_osr_parse()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   567
    Node* osr_buf = entry_map->in(TypeFunc::Parms+0);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   568
    entry_map->set_req(TypeFunc::Parms+0, top());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   569
    set_map(entry_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   570
    load_interpreter_state(osr_buf);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   571
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   572
    set_map(entry_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   573
    do_method_entry();
24442
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
   574
    if (depth() == 1 && C->age_code()) {
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
   575
      decrement_age();
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
   576
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   577
  }
25917
4502b5680f05 8051344: JVM crashed in Compile::start() during method parsing w/ UseRTMDeopt turned on
fzhinkin
parents: 24946
diff changeset
   578
4502b5680f05 8051344: JVM crashed in Compile::start() during method parsing w/ UseRTMDeopt turned on
fzhinkin
parents: 24946
diff changeset
   579
  if (depth() == 1 && !failing()) {
23491
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
   580
    // Add check to deoptimize the nmethod if RTM state was changed
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
   581
    rtm_deopt();
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
   582
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   583
25917
4502b5680f05 8051344: JVM crashed in Compile::start() during method parsing w/ UseRTMDeopt turned on
fzhinkin
parents: 24946
diff changeset
   584
  // Check for bailouts during method entry or RTM state check setup.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   585
  if (failing()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   586
    if (log)  log->done("parse");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   587
    C->set_default_node_notes(caller_nn);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   588
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   589
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   590
489c9b5090e2 Initial load
duke
parents:
diff changeset
   591
  entry_map = map();  // capture any changes performed by method setup code
489c9b5090e2 Initial load
duke
parents:
diff changeset
   592
  assert(jvms()->endoff() == map()->req(), "map matches JVMS layout");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   593
489c9b5090e2 Initial load
duke
parents:
diff changeset
   594
  // We begin parsing as if we have just encountered a jump to the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   595
  // method entry.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   596
  Block* entry_block = start_block();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   597
  assert(entry_block->start() == (is_osr_parse() ? osr_bci() : 0), "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   598
  set_map_clone(entry_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   599
  merge_common(entry_block, entry_block->next_path_num());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   600
489c9b5090e2 Initial load
duke
parents:
diff changeset
   601
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   602
  BytecodeParseHistogram *parse_histogram_obj = new (C->env()->arena()) BytecodeParseHistogram(this, C);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   603
  set_parse_histogram( parse_histogram_obj );
489c9b5090e2 Initial load
duke
parents:
diff changeset
   604
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   605
489c9b5090e2 Initial load
duke
parents:
diff changeset
   606
  // Parse all the basic blocks.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   607
  do_all_blocks();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   608
489c9b5090e2 Initial load
duke
parents:
diff changeset
   609
  C->set_default_node_notes(caller_nn);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   610
489c9b5090e2 Initial load
duke
parents:
diff changeset
   611
  // Check for bailouts during conversion to graph
489c9b5090e2 Initial load
duke
parents:
diff changeset
   612
  if (failing()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   613
    if (log)  log->done("parse");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   614
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   615
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   616
489c9b5090e2 Initial load
duke
parents:
diff changeset
   617
  // Fix up all exiting control flow.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   618
  set_map(entry_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   619
  do_exits();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   620
24424
2658d7834c6e 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 23528
diff changeset
   621
  if (log)  log->done("parse nodes='%d' live='%d' memory='" SIZE_FORMAT "'",
14623
70c4c1be0a14 7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents: 14621
diff changeset
   622
                      C->unique(), C->live_nodes(), C->node_arena()->used());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   623
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   624
489c9b5090e2 Initial load
duke
parents:
diff changeset
   625
//---------------------------do_all_blocks-------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   626
void Parse::do_all_blocks() {
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   627
  bool has_irreducible = flow()->has_irreducible_entry();
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   628
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   629
  // Walk over all blocks in Reverse Post-Order.
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   630
  while (true) {
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   631
    bool progress = false;
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   632
    for (int rpo = 0; rpo < block_count(); rpo++) {
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   633
      Block* block = rpo_at(rpo);
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   634
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   635
      if (block->is_parsed()) continue;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   636
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   637
      if (!block->is_merged()) {
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   638
        // Dead block, no state reaches this block
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   639
        continue;
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   640
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   641
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   642
      // Prepare to parse this block.
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   643
      load_state_from(block);
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   644
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   645
      if (stopped()) {
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   646
        // Block is dead.
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   647
        continue;
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   648
      }
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   649
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   650
      blocks_parsed++;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   651
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   652
      progress = true;
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   653
      if (block->is_loop_head() || block->is_handler() || has_irreducible && !block->is_ready()) {
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   654
        // Not all preds have been parsed.  We must build phis everywhere.
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   655
        // (Note that dead locals do not get phis built, ever.)
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   656
        ensure_phis_everywhere();
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   657
8732
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
   658
        if (block->is_SEL_head() &&
9446
748a37b25d10 5091921: Sign flip issues in loop optimizer
kvn
parents: 8921
diff changeset
   659
            (UseLoopPredicate || LoopLimitCheck)) {
8732
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
   660
          // Add predicate to single entry (not irreducible) loop head.
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
   661
          assert(!block->has_merged_backedge(), "only entry paths should be merged for now");
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
   662
          // Need correct bci for predicate.
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
   663
          // It is fine to set it here since do_one_block() will set it anyway.
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
   664
          set_parse_bci(block->start());
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
   665
          add_predicate();
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
   666
          // Add new region for back branches.
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
   667
          int edges = block->pred_count() - block->preds_parsed() + 1; // +1 for original region
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   668
          RegionNode *r = new RegionNode(edges+1);
8732
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
   669
          _gvn.set_type(r, Type::CONTROL);
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
   670
          record_for_igvn(r);
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
   671
          r->init_req(edges, control());
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
   672
          set_control(r);
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
   673
          // Add new phis.
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
   674
          ensure_phis_everywhere();
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
   675
        }
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
   676
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   677
        // Leave behind an undisturbed copy of the map, for future merges.
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   678
        set_map(clone_map());
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   679
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   680
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   681
      if (control()->is_Region() && !block->is_loop_head() && !has_irreducible && !block->is_handler()) {
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   682
        // In the absence of irreducible loops, the Region and Phis
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   683
        // associated with a merge that doesn't involve a backedge can
2131
98f9cef66a34 6810672: Comment typos
twisti
parents: 1399
diff changeset
   684
        // be simplified now since the RPO parsing order guarantees
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   685
        // that any path which was supposed to reach here has already
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   686
        // been parsed or must be dead.
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   687
        Node* c = control();
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   688
        Node* result = _gvn.transform_no_reclaim(control());
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   689
        if (c != result && TraceOptoParse) {
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   690
          tty->print_cr("Block #%d replace %d with %d", block->rpo(), c->_idx, result->_idx);
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   691
        }
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   692
        if (result != top()) {
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   693
          record_for_igvn(result);
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   694
        }
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   695
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   696
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   697
      // Parse the block.
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   698
      do_one_block();
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   699
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   700
      // Check for bailouts.
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   701
      if (failing())  return;
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   702
    }
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   703
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   704
    // with irreducible loops multiple passes might be necessary to parse everything
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   705
    if (!has_irreducible || !progress) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   706
      break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   707
    }
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   708
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   709
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   710
  blocks_seen += block_count();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   711
489c9b5090e2 Initial load
duke
parents:
diff changeset
   712
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   713
  // Make sure there are no half-processed blocks remaining.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   714
  // Every remaining unprocessed block is dead and may be ignored now.
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   715
  for (int rpo = 0; rpo < block_count(); rpo++) {
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   716
    Block* block = rpo_at(rpo);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   717
    if (!block->is_parsed()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   718
      if (TraceOptoParse) {
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   719
        tty->print_cr("Skipped dead block %d at bci:%d", rpo, block->start());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   720
      }
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   721
      assert(!block->is_merged(), "no half-processed blocks");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   722
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   723
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   724
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   725
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   726
489c9b5090e2 Initial load
duke
parents:
diff changeset
   727
//-------------------------------build_exits----------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   728
// Build normal and exceptional exit merge points.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   729
void Parse::build_exits() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   730
  // make a clone of caller to prevent sharing of side-effects
489c9b5090e2 Initial load
duke
parents:
diff changeset
   731
  _exits.set_map(_exits.clone_map());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   732
  _exits.clean_stack(_exits.sp());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   733
  _exits.sync_jvms();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   734
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   735
  RegionNode* region = new RegionNode(1);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   736
  record_for_igvn(region);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   737
  gvn().set_type_bottom(region);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   738
  _exits.set_control(region);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   739
489c9b5090e2 Initial load
duke
parents:
diff changeset
   740
  // Note:  iophi and memphi are not transformed until do_exits.
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   741
  Node* iophi  = new PhiNode(region, Type::ABIO);
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   742
  Node* memphi = new PhiNode(region, Type::MEMORY, TypePtr::BOTTOM);
17383
3665c0901a0d 6934604: enable parts of EliminateAutoBox by default
kvn
parents: 15118
diff changeset
   743
  gvn().set_type_bottom(iophi);
3665c0901a0d 6934604: enable parts of EliminateAutoBox by default
kvn
parents: 15118
diff changeset
   744
  gvn().set_type_bottom(memphi);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   745
  _exits.set_i_o(iophi);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   746
  _exits.set_all_memory(memphi);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   747
489c9b5090e2 Initial load
duke
parents:
diff changeset
   748
  // Add a return value to the exit state.  (Do not push it yet.)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   749
  if (tf()->range()->cnt() > TypeFunc::Parms) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   750
    const Type* ret_type = tf()->range()->field_at(TypeFunc::Parms);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   751
    // Don't "bind" an unloaded return klass to the ret_phi. If the klass
489c9b5090e2 Initial load
duke
parents:
diff changeset
   752
    // becomes loaded during the subsequent parsing, the loaded and unloaded
489c9b5090e2 Initial load
duke
parents:
diff changeset
   753
    // types will not join when we transform and push in do_exits().
489c9b5090e2 Initial load
duke
parents:
diff changeset
   754
    const TypeOopPtr* ret_oop_type = ret_type->isa_oopptr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   755
    if (ret_oop_type && !ret_oop_type->klass()->is_loaded()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   756
      ret_type = TypeOopPtr::BOTTOM;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   757
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   758
    int         ret_size = type2size[ret_type->basic_type()];
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   759
    Node*       ret_phi  = new PhiNode(region, ret_type);
17383
3665c0901a0d 6934604: enable parts of EliminateAutoBox by default
kvn
parents: 15118
diff changeset
   760
    gvn().set_type_bottom(ret_phi);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   761
    _exits.ensure_stack(ret_size);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   762
    assert((int)(tf()->range()->cnt() - TypeFunc::Parms) == ret_size, "good tf range");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   763
    assert(method()->return_type()->size() == ret_size, "tf agrees w/ method");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   764
    _exits.set_argument(0, ret_phi);  // here is where the parser finds it
489c9b5090e2 Initial load
duke
parents:
diff changeset
   765
    // Note:  ret_phi is not yet pushed, until do_exits.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   766
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   767
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   768
489c9b5090e2 Initial load
duke
parents:
diff changeset
   769
489c9b5090e2 Initial load
duke
parents:
diff changeset
   770
//----------------------------build_start_state-------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   771
// Construct a state which contains only the incoming arguments from an
489c9b5090e2 Initial load
duke
parents:
diff changeset
   772
// unknown caller.  The method & bci will be NULL & InvocationEntryBci.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   773
JVMState* Compile::build_start_state(StartNode* start, const TypeFunc* tf) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   774
  int        arg_size = tf->domain()->cnt();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   775
  int        max_size = MAX2(arg_size, (int)tf->range()->cnt());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   776
  JVMState*  jvms     = new (this) JVMState(max_size - TypeFunc::Parms);
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   777
  SafePointNode* map  = new SafePointNode(max_size, NULL);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   778
  record_for_igvn(map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   779
  assert(arg_size == TypeFunc::Parms + (is_osr_compilation() ? 1 : method()->arg_size()), "correct arg_size");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   780
  Node_Notes* old_nn = default_node_notes();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   781
  if (old_nn != NULL && has_method()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   782
    Node_Notes* entry_nn = old_nn->clone(this);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   783
    JVMState* entry_jvms = new(this) JVMState(method(), old_nn->jvms());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   784
    entry_jvms->set_offsets(0);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   785
    entry_jvms->set_bci(entry_bci());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   786
    entry_nn->set_jvms(entry_jvms);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   787
    set_default_node_notes(entry_nn);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   788
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   789
  uint i;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   790
  for (i = 0; i < (uint)arg_size; i++) {
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   791
    Node* parm = initial_gvn()->transform(new ParmNode(start, i));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   792
    map->init_req(i, parm);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   793
    // Record all these guys for later GVN.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   794
    record_for_igvn(parm);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   795
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   796
  for (; i < map->req(); i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   797
    map->init_req(i, top());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   798
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   799
  assert(jvms->argoff() == TypeFunc::Parms, "parser gets arguments here");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   800
  set_default_node_notes(old_nn);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   801
  map->set_jvms(jvms);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   802
  jvms->set_map(map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   803
  return jvms;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   804
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   805
489c9b5090e2 Initial load
duke
parents:
diff changeset
   806
//-----------------------------make_node_notes---------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   807
Node_Notes* Parse::make_node_notes(Node_Notes* caller_nn) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   808
  if (caller_nn == NULL)  return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   809
  Node_Notes* nn = caller_nn->clone(C);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   810
  JVMState* caller_jvms = nn->jvms();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   811
  JVMState* jvms = new (C) JVMState(method(), caller_jvms);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   812
  jvms->set_offsets(0);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   813
  jvms->set_bci(_entry_bci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   814
  nn->set_jvms(jvms);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   815
  return nn;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   816
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   817
489c9b5090e2 Initial load
duke
parents:
diff changeset
   818
489c9b5090e2 Initial load
duke
parents:
diff changeset
   819
//--------------------------return_values--------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   820
void Compile::return_values(JVMState* jvms) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   821
  GraphKit kit(jvms);
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   822
  Node* ret = new ReturnNode(TypeFunc::Parms,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   823
                             kit.control(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   824
                             kit.i_o(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   825
                             kit.reset_memory(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   826
                             kit.frameptr(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   827
                             kit.returnadr());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   828
  // Add zero or 1 return values
489c9b5090e2 Initial load
duke
parents:
diff changeset
   829
  int ret_size = tf()->range()->cnt() - TypeFunc::Parms;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   830
  if (ret_size > 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   831
    kit.inc_sp(-ret_size);  // pop the return value(s)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   832
    kit.sync_jvms();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   833
    ret->add_req(kit.argument(0));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   834
    // Note:  The second dummy edge is not needed by a ReturnNode.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   835
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   836
  // bind it to root
489c9b5090e2 Initial load
duke
parents:
diff changeset
   837
  root()->add_req(ret);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   838
  record_for_igvn(ret);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   839
  initial_gvn()->transform_no_reclaim(ret);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   840
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   841
489c9b5090e2 Initial load
duke
parents:
diff changeset
   842
//------------------------rethrow_exceptions-----------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   843
// Bind all exception states in the list into a single RethrowNode.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   844
void Compile::rethrow_exceptions(JVMState* jvms) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   845
  GraphKit kit(jvms);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   846
  if (!kit.has_exceptions())  return;  // nothing to generate
489c9b5090e2 Initial load
duke
parents:
diff changeset
   847
  // Load my combined exception state into the kit, with all phis transformed:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   848
  SafePointNode* ex_map = kit.combine_and_pop_all_exception_states();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   849
  Node* ex_oop = kit.use_exception_state(ex_map);
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
   850
  RethrowNode* exit = new RethrowNode(kit.control(),
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   851
                                      kit.i_o(), kit.reset_memory(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   852
                                      kit.frameptr(), kit.returnadr(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   853
                                      // like a return but with exception input
489c9b5090e2 Initial load
duke
parents:
diff changeset
   854
                                      ex_oop);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   855
  // bind to root
489c9b5090e2 Initial load
duke
parents:
diff changeset
   856
  root()->add_req(exit);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   857
  record_for_igvn(exit);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   858
  initial_gvn()->transform_no_reclaim(exit);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   859
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   860
489c9b5090e2 Initial load
duke
parents:
diff changeset
   861
//---------------------------do_exceptions-------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   862
// Process exceptions arising from the current bytecode.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   863
// Send caught exceptions to the proper handler within this method.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   864
// Unhandled exceptions feed into _exit.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   865
void Parse::do_exceptions() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   866
  if (!has_exceptions())  return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   867
489c9b5090e2 Initial load
duke
parents:
diff changeset
   868
  if (failing()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   869
    // Pop them all off and throw them away.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   870
    while (pop_exception_state() != NULL) ;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   871
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   872
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   873
489c9b5090e2 Initial load
duke
parents:
diff changeset
   874
  PreserveJVMState pjvms(this, false);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   875
489c9b5090e2 Initial load
duke
parents:
diff changeset
   876
  SafePointNode* ex_map;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   877
  while ((ex_map = pop_exception_state()) != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   878
    if (!method()->has_exception_handlers()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   879
      // Common case:  Transfer control outward.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   880
      // Doing it this early allows the exceptions to common up
489c9b5090e2 Initial load
duke
parents:
diff changeset
   881
      // even between adjacent method calls.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   882
      throw_to_exit(ex_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   883
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   884
      // Have to look at the exception first.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   885
      assert(stopped(), "catch_inline_exceptions trashes the map");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   886
      catch_inline_exceptions(ex_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   887
      stop_and_kill_map();      // we used up this exception state; kill it
489c9b5090e2 Initial load
duke
parents:
diff changeset
   888
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   889
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   890
489c9b5090e2 Initial load
duke
parents:
diff changeset
   891
  // We now return to our regularly scheduled program:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   892
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   893
489c9b5090e2 Initial load
duke
parents:
diff changeset
   894
//---------------------------throw_to_exit-------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   895
// Merge the given map into an exception exit from this method.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   896
// The exception exit will handle any unlocking of receiver.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   897
// The ex_oop must be saved within the ex_map, unlike merge_exception.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   898
void Parse::throw_to_exit(SafePointNode* ex_map) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   899
  // Pop the JVMS to (a copy of) the caller.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   900
  GraphKit caller;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   901
  caller.set_map_clone(_caller->map());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   902
  caller.set_bci(_caller->bci());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   903
  caller.set_sp(_caller->sp());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   904
  // Copy out the standard machine state:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   905
  for (uint i = 0; i < TypeFunc::Parms; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   906
    caller.map()->set_req(i, ex_map->in(i));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   907
  }
24946
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
   908
  if (ex_map->has_replaced_nodes()) {
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
   909
    _replaced_nodes_for_exceptions = true;
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
   910
  }
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
   911
  caller.map()->transfer_replaced_nodes_from(ex_map, _new_idx);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   912
  // ...and the exception:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   913
  Node*          ex_oop        = saved_ex_oop(ex_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   914
  SafePointNode* caller_ex_map = caller.make_exception_state(ex_oop);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   915
  // Finally, collect the new exception state in my exits:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   916
  _exits.add_exception_state(caller_ex_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   917
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   918
489c9b5090e2 Initial load
duke
parents:
diff changeset
   919
//------------------------------do_exits---------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   920
void Parse::do_exits() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   921
  set_parse_bci(InvocationEntryBci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   922
489c9b5090e2 Initial load
duke
parents:
diff changeset
   923
  // Now peephole on the return bits
489c9b5090e2 Initial load
duke
parents:
diff changeset
   924
  Node* region = _exits.control();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   925
  _exits.set_control(gvn().transform(region));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   926
489c9b5090e2 Initial load
duke
parents:
diff changeset
   927
  Node* iophi = _exits.i_o();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   928
  _exits.set_i_o(gvn().transform(iophi));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   929
23190
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   930
  // Figure out if we need to emit the trailing barrier. The barrier is only
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   931
  // needed in the constructors, and only in three cases:
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   932
  //
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   933
  // 1. The constructor wrote a final. The effects of all initializations
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   934
  //    must be committed to memory before any code after the constructor
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   935
  //    publishes the reference to the newly constructed object. Rather
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   936
  //    than wait for the publication, we simply block the writes here.
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   937
  //    Rather than put a barrier on only those writes which are required
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   938
  //    to complete, we force all writes to complete.
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   939
  //
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   940
  // 2. On PPC64, also add MemBarRelease for constructors which write
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   941
  //    volatile fields. As support_IRIW_for_not_multiple_copy_atomic_cpu
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   942
  //    is set on PPC64, no sync instruction is issued after volatile
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   943
  //    stores. We want to guarantee the same behavior as on platforms
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   944
  //    with total store order, although this is not required by the Java
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   945
  //    memory model. So as with finals, we add a barrier here.
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   946
  //
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   947
  // 3. Experimental VM option is used to force the barrier if any field
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   948
  //    was written out in the constructor.
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   949
  //
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   950
  // "All bets are off" unless the first publication occurs after a
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   951
  // normal return from the constructor.  We do not attempt to detect
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   952
  // such unusual early publications.  But no barrier is needed on
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   953
  // exceptional returns, since they cannot publish normally.
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   954
  //
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   955
  if (method()->is_initializer() &&
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   956
        (wrote_final() ||
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   957
           PPC64_ONLY(wrote_volatile() ||)
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   958
           (AlwaysSafeConstructors && wrote_fields()))) {
17383
3665c0901a0d 6934604: enable parts of EliminateAutoBox by default
kvn
parents: 15118
diff changeset
   959
    _exits.insert_mem_bar(Op_MemBarRelease, alloc_with_final());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   960
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   961
    if (PrintOpto && (Verbose || WizardMode)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   962
      method()->print_name();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   963
      tty->print_cr(" writes finals and needs a memory barrier");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   964
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   965
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   966
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   967
23190
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   968
  // Any method can write a @Stable field; insert memory barriers after
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   969
  // those also. If there is a predecessor allocation node, bind the
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   970
  // barrier there.
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   971
  if (wrote_stable()) {
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   972
    _exits.insert_mem_bar(Op_MemBarRelease, alloc_with_final());
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   973
#ifndef PRODUCT
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   974
    if (PrintOpto && (Verbose || WizardMode)) {
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   975
      method()->print_name();
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   976
      tty->print_cr(" writes @Stable and needs a memory barrier");
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   977
    }
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   978
#endif
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   979
  }
e8bbf9cd711e 8031818: Experimental VM flag for enforcing safe object construction
shade
parents: 22873
diff changeset
   980
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   981
  for (MergeMemStream mms(_exits.merged_memory()); mms.next_non_empty(); ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   982
    // transform each slice of the original memphi:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   983
    mms.set_memory(_gvn.transform(mms.memory()));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   984
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   985
489c9b5090e2 Initial load
duke
parents:
diff changeset
   986
  if (tf()->range()->cnt() > TypeFunc::Parms) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   987
    const Type* ret_type = tf()->range()->field_at(TypeFunc::Parms);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   988
    Node*       ret_phi  = _gvn.transform( _exits.argument(0) );
489c9b5090e2 Initial load
duke
parents:
diff changeset
   989
    assert(_exits.control()->is_top() || !_gvn.type(ret_phi)->empty(), "return value must be well defined");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   990
    _exits.push_node(ret_type->basic_type(), ret_phi);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   991
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   992
489c9b5090e2 Initial load
duke
parents:
diff changeset
   993
  // Note:  Logic for creating and optimizing the ReturnNode is in Compile.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   994
489c9b5090e2 Initial load
duke
parents:
diff changeset
   995
  // Unlock along the exceptional paths.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   996
  // This is done late so that we can common up equivalent exceptions
489c9b5090e2 Initial load
duke
parents:
diff changeset
   997
  // (e.g., null checks) arising from multiple points within this method.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   998
  // See GraphKit::add_exception_state, which performs the commoning.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   999
  bool do_synch = method()->is_synchronized() && GenerateSynchronizationCode;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1000
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1001
  // record exit from a method if compiled while Dtrace is turned on.
24946
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
  1002
  if (do_synch || C->env()->dtrace_method_probes() || _replaced_nodes_for_exceptions) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1003
    // First move the exception list out of _exits:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1004
    GraphKit kit(_exits.transfer_exceptions_into_jvms());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1005
    SafePointNode* normal_map = kit.map();  // keep this guy safe
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1006
    // Now re-collect the exceptions into _exits:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1007
    SafePointNode* ex_map;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1008
    while ((ex_map = kit.pop_exception_state()) != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1009
      Node* ex_oop = kit.use_exception_state(ex_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1010
      // Force the exiting JVM state to have this method at InvocationEntryBci.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1011
      // The exiting JVM state is otherwise a copy of the calling JVMS.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1012
      JVMState* caller = kit.jvms();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1013
      JVMState* ex_jvms = caller->clone_shallow(C);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1014
      ex_jvms->set_map(kit.clone_map());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1015
      ex_jvms->map()->set_jvms(ex_jvms);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1016
      ex_jvms->set_bci(   InvocationEntryBci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1017
      kit.set_jvms(ex_jvms);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1018
      if (do_synch) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1019
        // Add on the synchronized-method box/object combo
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1020
        kit.map()->push_monitor(_synch_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1021
        // Unlock!
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1022
        kit.shared_unlock(_synch_lock->box_node(), _synch_lock->obj_node());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1023
      }
2867
69187054225f 6788527: Server vm intermittently fails with assertion "live value must not be garbage" with fastdebug bits
kvn
parents: 2570
diff changeset
  1024
      if (C->env()->dtrace_method_probes()) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1025
        kit.make_dtrace_method_exit(method());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1026
      }
24946
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
  1027
      if (_replaced_nodes_for_exceptions) {
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
  1028
        kit.map()->apply_replaced_nodes();
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
  1029
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1030
      // Done with exception-path processing.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1031
      ex_map = kit.make_exception_state(ex_oop);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1032
      assert(ex_jvms->same_calls_as(ex_map->jvms()), "sanity");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1033
      // Pop the last vestige of this method:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1034
      ex_map->set_jvms(caller->clone_shallow(C));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1035
      ex_map->jvms()->set_map(ex_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1036
      _exits.push_exception_state(ex_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1037
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1038
    assert(_exits.map() == normal_map, "keep the same return state");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1039
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1040
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1041
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1042
    // Capture very early exceptions (receiver null checks) from caller JVMS
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1043
    GraphKit caller(_caller);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1044
    SafePointNode* ex_map;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1045
    while ((ex_map = caller.pop_exception_state()) != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1046
      _exits.add_exception_state(ex_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1047
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1048
  }
24946
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
  1049
  _exits.map()->apply_replaced_nodes();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1050
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1051
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1052
//-----------------------------create_entry_map-------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1053
// Initialize our parser map to contain the types at method entry.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1054
// For OSR, the map contains a single RawPtr parameter.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1055
// Initial monitor locking for sync. methods is performed by do_method_entry.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1056
SafePointNode* Parse::create_entry_map() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1057
  // Check for really stupid bail-out cases.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1058
  uint len = TypeFunc::Parms + method()->max_locals() + method()->max_stack();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1059
  if (len >= 32760) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1060
    C->record_method_not_compilable_all_tiers("too many local variables");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1061
    return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1062
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1063
24946
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
  1064
  // clear current replaced nodes that are of no use from here on (map was cloned in build_exits).
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
  1065
  _caller->map()->delete_replaced_nodes();
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
  1066
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1067
  // If this is an inlined method, we may have to do a receiver null check.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1068
  if (_caller->has_method() && is_normal_parse() && !method()->is_static()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1069
    GraphKit kit(_caller);
14621
fd9265ab0f67 7172640: C2: instrinsic implementations in LibraryCallKit should use argument() instead of pop()
twisti
parents: 13964
diff changeset
  1070
    kit.null_check_receiver_before_call(method());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1071
    _caller = kit.transfer_exceptions_into_jvms();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1072
    if (kit.stopped()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1073
      _exits.add_exception_states_from(_caller);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1074
      _exits.set_jvms(_caller);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1075
      return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1076
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1077
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1078
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1079
  assert(method() != NULL, "parser must have a method");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1080
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1081
  // Create an initial safepoint to hold JVM state during parsing
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1082
  JVMState* jvms = new (C) JVMState(method(), _caller->has_method() ? _caller : NULL);
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
  1083
  set_map(new SafePointNode(len, jvms));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1084
  jvms->set_map(map());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1085
  record_for_igvn(map());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1086
  assert(jvms->endoff() == len, "correct jvms sizing");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1087
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1088
  SafePointNode* inmap = _caller->map();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1089
  assert(inmap != NULL, "must have inmap");
24946
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
  1090
  // In case of null check on receiver above
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
  1091
  map()->transfer_replaced_nodes_from(inmap, _new_idx);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1092
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1093
  uint i;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1094
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1095
  // Pass thru the predefined input parameters.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1096
  for (i = 0; i < TypeFunc::Parms; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1097
    map()->init_req(i, inmap->in(i));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1098
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1099
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1100
  if (depth() == 1) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1101
    assert(map()->memory()->Opcode() == Op_Parm, "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1102
    // Insert the memory aliasing node
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1103
    set_all_memory(reset_memory());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1104
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1105
  assert(merged_memory(), "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1106
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1107
  // Now add the locals which are initially bound to arguments:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1108
  uint arg_size = tf()->domain()->cnt();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1109
  ensure_stack(arg_size - TypeFunc::Parms);  // OSR methods have funny args
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1110
  for (i = TypeFunc::Parms; i < arg_size; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1111
    map()->init_req(i, inmap->argument(_caller, i - TypeFunc::Parms));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1112
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1113
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1114
  // Clear out the rest of the map (locals and stack)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1115
  for (i = arg_size; i < len; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1116
    map()->init_req(i, top());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1117
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1118
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1119
  SafePointNode* entry_map = stop();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1120
  return entry_map;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1121
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1122
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1123
//-----------------------------do_method_entry--------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1124
// Emit any code needed in the pseudo-block before BCI zero.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1125
// The main thing to do is lock the receiver of a synchronized method.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1126
void Parse::do_method_entry() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1127
  set_parse_bci(InvocationEntryBci); // Pseudo-BCP
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1128
  set_sp(0);                      // Java Stack Pointer
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1129
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1130
  NOT_PRODUCT( count_compiled_calls(true/*at_method_entry*/, false/*is_inline*/); )
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1131
2867
69187054225f 6788527: Server vm intermittently fails with assertion "live value must not be garbage" with fastdebug bits
kvn
parents: 2570
diff changeset
  1132
  if (C->env()->dtrace_method_probes()) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1133
    make_dtrace_method_entry(method());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1134
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1135
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1136
  // If the method is synchronized, we need to construct a lock node, attach
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1137
  // it to the Start node, and pin it there.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1138
  if (method()->is_synchronized()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1139
    // Insert a FastLockNode right after the Start which takes as arguments
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1140
    // the current thread pointer, the "this" pointer & the address of the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1141
    // stack slot pair used for the lock.  The "this" pointer is a projection
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1142
    // off the start node, but the locking spot has to be constructed by
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1143
    // creating a ConLNode of 0, and boxing it with a BoxLockNode.  The BoxLockNode
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1144
    // becomes the second argument to the FastLockNode call.  The
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1145
    // FastLockNode becomes the new control parent to pin it to the start.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1146
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1147
    // Setup Object Pointer
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1148
    Node *lock_obj = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1149
    if(method()->is_static()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1150
      ciInstance* mirror = _method->holder()->java_mirror();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1151
      const TypeInstPtr *t_lock = TypeInstPtr::make(mirror);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1152
      lock_obj = makecon(t_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1153
    } else {                  // Else pass the "this" pointer,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1154
      lock_obj = local(0);    // which is Parm0 from StartNode
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1155
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1156
    // Clear out dead values from the debug info.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1157
    kill_dead_locals();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1158
    // Build the FastLockNode
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1159
    _synch_lock = shared_lock(lock_obj);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1160
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1161
21099
46e6bbecd9e5 8024070: C2 needs some form of type speculation
roland
parents: 21089
diff changeset
  1162
  // Feed profiling data for parameters to the type system so it can
46e6bbecd9e5 8024070: C2 needs some form of type speculation
roland
parents: 21089
diff changeset
  1163
  // propagate it as speculative types
46e6bbecd9e5 8024070: C2 needs some form of type speculation
roland
parents: 21089
diff changeset
  1164
  record_profiled_parameters_for_speculation();
46e6bbecd9e5 8024070: C2 needs some form of type speculation
roland
parents: 21089
diff changeset
  1165
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1166
  if (depth() == 1) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1167
    increment_and_test_invocation_counter(Tier2CompileThreshold);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1168
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1169
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1170
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1171
//------------------------------init_blocks------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1172
// Initialize our parser map to contain the types/monitors at method entry.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1173
void Parse::init_blocks() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1174
  // Create the blocks.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1175
  _block_count = flow()->block_count();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1176
  _blocks = NEW_RESOURCE_ARRAY(Block, _block_count);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1177
  Copy::zero_to_bytes(_blocks, sizeof(Block)*_block_count);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1178
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1179
  int rpo;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1180
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1181
  // Initialize the structs.
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1182
  for (rpo = 0; rpo < block_count(); rpo++) {
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1183
    Block* block = rpo_at(rpo);
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1184
    block->init_node(this, rpo);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1185
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1186
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1187
  // Collect predecessor and successor information.
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1188
  for (rpo = 0; rpo < block_count(); rpo++) {
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1189
    Block* block = rpo_at(rpo);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1190
    block->init_graph(this);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1191
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1192
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1193
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1194
//-------------------------------init_node-------------------------------------
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1195
void Parse::Block::init_node(Parse* outer, int rpo) {
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1196
  _flow = outer->flow()->rpo_at(rpo);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1197
  _pred_count = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1198
  _preds_parsed = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1199
  _count = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1200
  assert(pred_count() == 0 && preds_parsed() == 0, "sanity");
8732
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
  1201
  assert(!(is_merged() || is_parsed() || is_handler() || has_merged_backedge()), "sanity");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1202
  assert(_live_locals.size() == 0, "sanity");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1203
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1204
  // entry point has additional predecessor
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1205
  if (flow()->is_start())  _pred_count++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1206
  assert(flow()->is_start() == (this == outer->start_block()), "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1207
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1208
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1209
//-------------------------------init_graph------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1210
void Parse::Block::init_graph(Parse* outer) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1211
  // Create the successor list for this parser block.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1212
  GrowableArray<ciTypeFlow::Block*>* tfs = flow()->successors();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1213
  GrowableArray<ciTypeFlow::Block*>* tfe = flow()->exceptions();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1214
  int ns = tfs->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1215
  int ne = tfe->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1216
  _num_successors = ns;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1217
  _all_successors = ns+ne;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1218
  _successors = (ns+ne == 0) ? NULL : NEW_RESOURCE_ARRAY(Block*, ns+ne);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1219
  int p = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1220
  for (int i = 0; i < ns+ne; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1221
    ciTypeFlow::Block* tf2 = (i < ns) ? tfs->at(i) : tfe->at(i-ns);
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1222
    Block* block2 = outer->rpo_at(tf2->rpo());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1223
    _successors[i] = block2;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1224
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1225
    // Accumulate pred info for the other block, too.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1226
    if (i < ns) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1227
      block2->_pred_count++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1228
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1229
      block2->_is_handler = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1230
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1231
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1232
    #ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1233
    // A block's successors must be distinguishable by BCI.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1234
    // That is, no bytecode is allowed to branch to two different
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1235
    // clones of the same code location.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1236
    for (int j = 0; j < i; j++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1237
      Block* block1 = _successors[j];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1238
      if (block1 == block2)  continue;  // duplicates are OK
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1239
      assert(block1->start() != block2->start(), "successors have unique bcis");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1240
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1241
    #endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1242
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1243
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1244
  // Note: We never call next_path_num along exception paths, so they
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1245
  // never get processed as "ready".  Also, the input phis of exception
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1246
  // handlers get specially processed, so that
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1247
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1248
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1249
//---------------------------successor_for_bci---------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1250
Parse::Block* Parse::Block::successor_for_bci(int bci) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1251
  for (int i = 0; i < all_successors(); i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1252
    Block* block2 = successor_at(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1253
    if (block2->start() == bci)  return block2;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1254
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1255
  // We can actually reach here if ciTypeFlow traps out a block
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1256
  // due to an unloaded class, and concurrently with compilation the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1257
  // class is then loaded, so that a later phase of the parser is
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1258
  // able to see more of the bytecode CFG.  Or, the flow pass and
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1259
  // the parser can have a minor difference of opinion about executability
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1260
  // of bytecodes.  For example, "obj.field = null" is executable even
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1261
  // if the field's type is an unloaded class; the flow pass used to
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1262
  // make a trap for such code.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1263
  return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1264
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1265
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1266
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1267
//-----------------------------stack_type_at-----------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1268
const Type* Parse::Block::stack_type_at(int i) const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1269
  return get_type(flow()->stack_type_at(i));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1270
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1271
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1272
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1273
//-----------------------------local_type_at-----------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1274
const Type* Parse::Block::local_type_at(int i) const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1275
  // Make dead locals fall to bottom.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1276
  if (_live_locals.size() == 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1277
    MethodLivenessResult live_locals = flow()->outer()->method()->liveness_at_bci(start());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1278
    // This bitmap can be zero length if we saw a breakpoint.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1279
    // In such cases, pretend they are all live.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1280
    ((Block*)this)->_live_locals = live_locals;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1281
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1282
  if (_live_locals.size() > 0 && !_live_locals.at(i))
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1283
    return Type::BOTTOM;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1284
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1285
  return get_type(flow()->local_type_at(i));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1286
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1287
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1288
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1289
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1290
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1291
//----------------------------name_for_bc--------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1292
// helper method for BytecodeParseHistogram
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1293
static const char* name_for_bc(int i) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1294
  return Bytecodes::is_defined(i) ? Bytecodes::name(Bytecodes::cast(i)) : "xxxunusedxxx";
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1295
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1296
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1297
//----------------------------BytecodeParseHistogram------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1298
Parse::BytecodeParseHistogram::BytecodeParseHistogram(Parse *p, Compile *c) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1299
  _parser   = p;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1300
  _compiler = c;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1301
  if( ! _initialized ) { _initialized = true; reset(); }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1302
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1303
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1304
//----------------------------current_count------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1305
int Parse::BytecodeParseHistogram::current_count(BPHType bph_type) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1306
  switch( bph_type ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1307
  case BPH_transforms: { return _parser->gvn().made_progress(); }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1308
  case BPH_values:     { return _parser->gvn().made_new_values(); }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1309
  default: { ShouldNotReachHere(); return 0; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1310
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1311
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1312
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1313
//----------------------------initialized--------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1314
bool Parse::BytecodeParseHistogram::initialized() { return _initialized; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1315
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1316
//----------------------------reset--------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1317
void Parse::BytecodeParseHistogram::reset() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1318
  int i = Bytecodes::number_of_codes;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1319
  while (i-- > 0) { _bytecodes_parsed[i] = 0; _nodes_constructed[i] = 0; _nodes_transformed[i] = 0; _new_values[i] = 0; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1320
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1321
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1322
//----------------------------set_initial_state--------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1323
// Record info when starting to parse one bytecode
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1324
void Parse::BytecodeParseHistogram::set_initial_state( Bytecodes::Code bc ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1325
  if( PrintParseStatistics && !_parser->is_osr_parse() ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1326
    _initial_bytecode    = bc;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1327
    _initial_node_count  = _compiler->unique();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1328
    _initial_transforms  = current_count(BPH_transforms);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1329
    _initial_values      = current_count(BPH_values);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1330
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1331
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1332
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1333
//----------------------------record_change--------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1334
// Record results of parsing one bytecode
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1335
void Parse::BytecodeParseHistogram::record_change() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1336
  if( PrintParseStatistics && !_parser->is_osr_parse() ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1337
    ++_bytecodes_parsed[_initial_bytecode];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1338
    _nodes_constructed [_initial_bytecode] += (_compiler->unique() - _initial_node_count);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1339
    _nodes_transformed [_initial_bytecode] += (current_count(BPH_transforms) - _initial_transforms);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1340
    _new_values        [_initial_bytecode] += (current_count(BPH_values)     - _initial_values);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1341
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1342
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1343
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1344
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1345
//----------------------------print--------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1346
void Parse::BytecodeParseHistogram::print(float cutoff) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1347
  ResourceMark rm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1348
  // print profile
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1349
  int total  = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1350
  int i      = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1351
  for( i = 0; i < Bytecodes::number_of_codes; ++i ) { total += _bytecodes_parsed[i]; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1352
  int abs_sum = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1353
  tty->cr();   //0123456789012345678901234567890123456789012345678901234567890123456789
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1354
  tty->print_cr("Histogram of %d parsed bytecodes:", total);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1355
  if( total == 0 ) { return; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1356
  tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1357
  tty->print_cr("absolute:  count of compiled bytecodes of this type");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1358
  tty->print_cr("relative:  percentage contribution to compiled nodes");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1359
  tty->print_cr("nodes   :  Average number of nodes constructed per bytecode");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1360
  tty->print_cr("rnodes  :  Significance towards total nodes constructed, (nodes*relative)");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1361
  tty->print_cr("transforms: Average amount of tranform progress per bytecode compiled");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1362
  tty->print_cr("values  :  Average number of node values improved per bytecode");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1363
  tty->print_cr("name    :  Bytecode name");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1364
  tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1365
  tty->print_cr("  absolute  relative   nodes  rnodes  transforms  values   name");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1366
  tty->print_cr("----------------------------------------------------------------------");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1367
  while (--i > 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1368
    int       abs = _bytecodes_parsed[i];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1369
    float     rel = abs * 100.0F / total;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1370
    float   nodes = _bytecodes_parsed[i] == 0 ? 0 : (1.0F * _nodes_constructed[i])/_bytecodes_parsed[i];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1371
    float  rnodes = _bytecodes_parsed[i] == 0 ? 0 :  rel * nodes;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1372
    float  xforms = _bytecodes_parsed[i] == 0 ? 0 : (1.0F * _nodes_transformed[i])/_bytecodes_parsed[i];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1373
    float  values = _bytecodes_parsed[i] == 0 ? 0 : (1.0F * _new_values       [i])/_bytecodes_parsed[i];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1374
    if (cutoff <= rel) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1375
      tty->print_cr("%10d  %7.2f%%  %6.1f  %6.2f   %6.1f   %6.1f     %s", abs, rel, nodes, rnodes, xforms, values, name_for_bc(i));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1376
      abs_sum += abs;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1377
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1378
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1379
  tty->print_cr("----------------------------------------------------------------------");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1380
  float rel_sum = abs_sum * 100.0F / total;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1381
  tty->print_cr("%10d  %7.2f%%    (cutoff = %.2f%%)", abs_sum, rel_sum, cutoff);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1382
  tty->print_cr("----------------------------------------------------------------------");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1383
  tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1384
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1385
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1386
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1387
//----------------------------load_state_from----------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1388
// Load block/map/sp.  But not do not touch iter/bci.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1389
void Parse::load_state_from(Block* block) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1390
  set_block(block);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1391
  // load the block's JVM state:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1392
  set_map(block->start_map());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1393
  set_sp( block->start_sp());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1394
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1395
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1396
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1397
//-----------------------------record_state------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1398
void Parse::Block::record_state(Parse* p) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1399
  assert(!is_merged(), "can only record state once, on 1st inflow");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1400
  assert(start_sp() == p->sp(), "stack pointer must agree with ciTypeFlow");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1401
  set_start_map(p->stop());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1402
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1403
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1404
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1405
//------------------------------do_one_block-----------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1406
void Parse::do_one_block() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1407
  if (TraceOptoParse) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1408
    Block *b = block();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1409
    int ns = b->num_successors();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1410
    int nt = b->all_successors();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1411
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1412
    tty->print("Parsing block #%d at bci [%d,%d), successors: ",
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1413
                  block()->rpo(), block()->start(), block()->limit());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1414
    for (int i = 0; i < nt; i++) {
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1415
      tty->print((( i < ns) ? " %d" : " %d(e)"), b->successor_at(i)->rpo());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1416
    }
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1417
    if (b->is_loop_head()) tty->print("  lphd");
24424
2658d7834c6e 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 23528
diff changeset
  1418
    tty->cr();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1419
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1420
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1421
  assert(block()->is_merged(), "must be merged before being parsed");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1422
  block()->mark_parsed();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1423
  ++_blocks_parsed;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1424
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1425
  // Set iterator to start of block.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1426
  iter().reset_to_bci(block()->start());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1427
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1428
  CompileLog* log = C->log();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1429
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1430
  // Parse bytecodes
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1431
  while (!stopped() && !failing()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1432
    iter().next();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1433
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1434
    // Learn the current bci from the iterator:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1435
    set_parse_bci(iter().cur_bci());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1436
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1437
    if (bci() == block()->limit()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1438
      // Do not walk into the next block until directed by do_all_blocks.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1439
      merge(bci());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1440
      break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1441
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1442
    assert(bci() < block()->limit(), "bci still in block");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1443
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1444
    if (log != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1445
      // Output an optional context marker, to help place actions
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1446
      // that occur during parsing of this BC.  If there is no log
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1447
      // output until the next context string, this context string
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1448
      // will be silently ignored.
13964
01a2b863cc61 7177003: C1: LogCompilation support
vlivanov
parents: 13931
diff changeset
  1449
      log->set_context("bc code='%d' bci='%d'", (int)bc(), bci());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1450
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1451
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1452
    if (block()->has_trap_at(bci())) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1453
      // We must respect the flow pass's traps, because it will refuse
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1454
      // to produce successors for trapping blocks.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1455
      int trap_index = block()->flow()->trap_index();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1456
      assert(trap_index != 0, "trap index must be valid");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1457
      uncommon_trap(trap_index);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1458
      break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1459
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1460
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1461
    NOT_PRODUCT( parse_histogram()->set_initial_state(bc()); );
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1462
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1463
#ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1464
    int pre_bc_sp = sp();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1465
    int inputs, depth;
14621
fd9265ab0f67 7172640: C2: instrinsic implementations in LibraryCallKit should use argument() instead of pop()
twisti
parents: 13964
diff changeset
  1466
    bool have_se = !stopped() && compute_stack_effects(inputs, depth);
13393
f0344cc50a90 7187454: stack overflow in C2 compiler thread on Solaris x86
kvn
parents: 13391
diff changeset
  1467
    assert(!have_se || pre_bc_sp >= inputs, err_msg_res("have enough stack to execute this BC: pre_bc_sp=%d, inputs=%d", pre_bc_sp, inputs));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1468
#endif //ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1469
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1470
    do_one_bytecode();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1471
15118
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 14623
diff changeset
  1472
    assert(!have_se || stopped() || failing() || (sp() - pre_bc_sp) == depth,
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 14623
diff changeset
  1473
           err_msg_res("incorrect depth prediction: sp=%d, pre_bc_sp=%d, depth=%d", sp(), pre_bc_sp, depth));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1474
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1475
    do_exceptions();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1476
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1477
    NOT_PRODUCT( parse_histogram()->record_change(); );
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1478
13964
01a2b863cc61 7177003: C1: LogCompilation support
vlivanov
parents: 13931
diff changeset
  1479
    if (log != NULL)
01a2b863cc61 7177003: C1: LogCompilation support
vlivanov
parents: 13931
diff changeset
  1480
      log->clear_context();  // skip marker if nothing was printed
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1481
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1482
    // Fall into next bytecode.  Each bytecode normally has 1 sequential
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1483
    // successor which is typically made ready by visiting this bytecode.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1484
    // If the successor has several predecessors, then it is a merge
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1485
    // point, starts a new basic block, and is handled like other basic blocks.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1486
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1487
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1488
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1489
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1490
//------------------------------merge------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1491
void Parse::set_parse_bci(int bci) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1492
  set_bci(bci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1493
  Node_Notes* nn = C->default_node_notes();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1494
  if (nn == NULL)  return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1495
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1496
  // Collect debug info for inlined calls unless -XX:-DebugInlinedCalls.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1497
  if (!DebugInlinedCalls && depth() > 1) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1498
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1499
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1500
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1501
  // Update the JVMS annotation, if present.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1502
  JVMState* jvms = nn->jvms();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1503
  if (jvms != NULL && jvms->bci() != bci) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1504
    // Update the JVMS.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1505
    jvms = jvms->clone_shallow(C);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1506
    jvms->set_bci(bci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1507
    nn->set_jvms(jvms);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1508
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1509
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1510
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1511
//------------------------------merge------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1512
// Merge the current mapping into the basic block starting at bci
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1513
void Parse::merge(int target_bci) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1514
  Block* target = successor_for_bci(target_bci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1515
  if (target == NULL) { handle_missing_successor(target_bci); return; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1516
  assert(!target->is_ready(), "our arrival must be expected");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1517
  int pnum = target->next_path_num();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1518
  merge_common(target, pnum);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1519
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1520
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1521
//-------------------------merge_new_path--------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1522
// Merge the current mapping into the basic block, using a new path
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1523
void Parse::merge_new_path(int target_bci) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1524
  Block* target = successor_for_bci(target_bci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1525
  if (target == NULL) { handle_missing_successor(target_bci); return; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1526
  assert(!target->is_ready(), "new path into frozen graph");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1527
  int pnum = target->add_new_path();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1528
  merge_common(target, pnum);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1529
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1530
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1531
//-------------------------merge_exception-------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1532
// Merge the current mapping into the basic block starting at bci
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1533
// The ex_oop must be pushed on the stack, unlike throw_to_exit.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1534
void Parse::merge_exception(int target_bci) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1535
  assert(sp() == 1, "must have only the throw exception on the stack");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1536
  Block* target = successor_for_bci(target_bci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1537
  if (target == NULL) { handle_missing_successor(target_bci); return; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1538
  assert(target->is_handler(), "exceptions are handled by special blocks");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1539
  int pnum = target->add_new_path();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1540
  merge_common(target, pnum);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1541
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1542
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1543
//--------------------handle_missing_successor---------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1544
void Parse::handle_missing_successor(int target_bci) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1545
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1546
  Block* b = block();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1547
  int trap_bci = b->flow()->has_trap()? b->flow()->trap_bci(): -1;
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1548
  tty->print_cr("### Missing successor at bci:%d for block #%d (trap_bci:%d)", target_bci, b->rpo(), trap_bci);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1549
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1550
  ShouldNotReachHere();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1551
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1552
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1553
//--------------------------merge_common---------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1554
void Parse::merge_common(Parse::Block* target, int pnum) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1555
  if (TraceOptoParse) {
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1556
    tty->print("Merging state at block #%d bci:%d", target->rpo(), target->start());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1557
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1558
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1559
  // Zap extra stack slots to top
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1560
  assert(sp() == target->start_sp(), "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1561
  clean_stack(sp());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1562
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1563
  if (!target->is_merged()) {   // No prior mapping at this bci
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1564
    if (TraceOptoParse) { tty->print(" with empty state");  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1565
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1566
    // If this path is dead, do not bother capturing it as a merge.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1567
    // It is "as if" we had 1 fewer predecessors from the beginning.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1568
    if (stopped()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1569
      if (TraceOptoParse)  tty->print_cr(", but path is dead and doesn't count");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1570
      return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1571
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1572
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1573
    // Record that a new block has been merged.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1574
    ++_blocks_merged;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1575
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1576
    // Make a region if we know there are multiple or unpredictable inputs.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1577
    // (Also, if this is a plain fall-through, we might see another region,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1578
    // which must not be allowed into this block's map.)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1579
    if (pnum > PhiNode::Input         // Known multiple inputs.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1580
        || target->is_handler()       // These have unpredictable inputs.
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1581
        || target->is_loop_head()     // Known multiple inputs
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1582
        || control()->is_Region()) {  // We must hide this guy.
8732
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
  1583
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
  1584
      int current_bci = bci();
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
  1585
      set_parse_bci(target->start()); // Set target bci
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
  1586
      if (target->is_SEL_head()) {
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
  1587
        DEBUG_ONLY( target->mark_merged_backedge(block()); )
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
  1588
        if (target->start() == 0) {
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
  1589
          // Add loop predicate for the special case when
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
  1590
          // there are backbranches to the method entry.
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
  1591
          add_predicate();
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
  1592
        }
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
  1593
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1594
      // Add a Region to start the new basic block.  Phis will be added
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1595
      // later lazily.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1596
      int edges = target->pred_count();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1597
      if (edges < pnum)  edges = pnum;  // might be a new path!
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
  1598
      RegionNode *r = new RegionNode(edges+1);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1599
      gvn().set_type(r, Type::CONTROL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1600
      record_for_igvn(r);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1601
      // zap all inputs to NULL for debugging (done in Node(uint) constructor)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1602
      // for (int j = 1; j < edges+1; j++) { r->init_req(j, NULL); }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1603
      r->init_req(pnum, control());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1604
      set_control(r);
8732
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
  1605
      set_parse_bci(current_bci); // Restore bci
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1606
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1607
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1608
    // Convert the existing Parser mapping into a mapping at this bci.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1609
    store_state_to(target);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1610
    assert(target->is_merged(), "do not come here twice");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1611
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1612
  } else {                      // Prior mapping at this bci
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1613
    if (TraceOptoParse) {  tty->print(" with previous state"); }
8732
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
  1614
#ifdef ASSERT
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
  1615
    if (target->is_SEL_head()) {
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
  1616
      target->mark_merged_backedge(block());
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
  1617
    }
16fc1c68714b 7008866: Missing loop predicate for loop with multiple entries
kvn
parents: 7397
diff changeset
  1618
#endif
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1619
    // We must not manufacture more phis if the target is already parsed.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1620
    bool nophi = target->is_parsed();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1621
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1622
    SafePointNode* newin = map();// Hang on to incoming mapping
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1623
    Block* save_block = block(); // Hang on to incoming block;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1624
    load_state_from(target);    // Get prior mapping
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1625
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1626
    assert(newin->jvms()->locoff() == jvms()->locoff(), "JVMS layouts agree");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1627
    assert(newin->jvms()->stkoff() == jvms()->stkoff(), "JVMS layouts agree");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1628
    assert(newin->jvms()->monoff() == jvms()->monoff(), "JVMS layouts agree");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1629
    assert(newin->jvms()->endoff() == jvms()->endoff(), "JVMS layouts agree");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1630
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1631
    // Iterate over my current mapping and the old mapping.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1632
    // Where different, insert Phi functions.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1633
    // Use any existing Phi functions.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1634
    assert(control()->is_Region(), "must be merging to a region");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1635
    RegionNode* r = control()->as_Region();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1636
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1637
    // Compute where to merge into
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1638
    // Merge incoming control path
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1639
    r->init_req(pnum, newin->control());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1640
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1641
    if (pnum == 1) {            // Last merge for this Region?
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1642
      if (!block()->flow()->is_irreducible_entry()) {
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1643
        Node* result = _gvn.transform_no_reclaim(r);
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1644
        if (r != result && TraceOptoParse) {
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1645
          tty->print_cr("Block #%d replace %d with %d", block()->rpo(), r->_idx, result->_idx);
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1646
        }
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1647
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1648
      record_for_igvn(r);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1649
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1650
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1651
    // Update all the non-control inputs to map:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1652
    assert(TypeFunc::Parms == newin->jvms()->locoff(), "parser map should contain only youngest jvms");
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1653
    bool check_elide_phi = target->is_SEL_backedge(save_block);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1654
    for (uint j = 1; j < newin->req(); j++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1655
      Node* m = map()->in(j);   // Current state of target.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1656
      Node* n = newin->in(j);   // Incoming change to target state.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1657
      PhiNode* phi;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1658
      if (m->is_Phi() && m->as_Phi()->region() == r)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1659
        phi = m->as_Phi();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1660
      else
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1661
        phi = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1662
      if (m != n) {             // Different; must merge
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1663
        switch (j) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1664
        // Frame pointer and Return Address never changes
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1665
        case TypeFunc::FramePtr:// Drop m, use the original value
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1666
        case TypeFunc::ReturnAdr:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1667
          break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1668
        case TypeFunc::Memory:  // Merge inputs to the MergeMem node
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1669
          assert(phi == NULL, "the merge contains phis, not vice versa");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1670
          merge_memory_edges(n->as_MergeMem(), pnum, nophi);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1671
          continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1672
        default:                // All normal stuff
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1673
          if (phi == NULL) {
11458
5ba160829cef 7128355: assert(!nocreate) failed: Cannot build a phi for a block already parsed
kvn
parents: 11445
diff changeset
  1674
            const JVMState* jvms = map()->jvms();
5ba160829cef 7128355: assert(!nocreate) failed: Cannot build a phi for a block already parsed
kvn
parents: 11445
diff changeset
  1675
            if (EliminateNestedLocks &&
5ba160829cef 7128355: assert(!nocreate) failed: Cannot build a phi for a block already parsed
kvn
parents: 11445
diff changeset
  1676
                jvms->is_mon(j) && jvms->is_monitor_box(j)) {
5ba160829cef 7128355: assert(!nocreate) failed: Cannot build a phi for a block already parsed
kvn
parents: 11445
diff changeset
  1677
              // BoxLock nodes are not commoning.
5ba160829cef 7128355: assert(!nocreate) failed: Cannot build a phi for a block already parsed
kvn
parents: 11445
diff changeset
  1678
              // Use old BoxLock node as merged box.
5ba160829cef 7128355: assert(!nocreate) failed: Cannot build a phi for a block already parsed
kvn
parents: 11445
diff changeset
  1679
              assert(newin->jvms()->is_monitor_box(j), "sanity");
5ba160829cef 7128355: assert(!nocreate) failed: Cannot build a phi for a block already parsed
kvn
parents: 11445
diff changeset
  1680
              // This assert also tests that nodes are BoxLock.
5ba160829cef 7128355: assert(!nocreate) failed: Cannot build a phi for a block already parsed
kvn
parents: 11445
diff changeset
  1681
              assert(BoxLockNode::same_slot(n, m), "sanity");
5ba160829cef 7128355: assert(!nocreate) failed: Cannot build a phi for a block already parsed
kvn
parents: 11445
diff changeset
  1682
              C->gvn_replace_by(n, m);
5ba160829cef 7128355: assert(!nocreate) failed: Cannot build a phi for a block already parsed
kvn
parents: 11445
diff changeset
  1683
            } else if (!check_elide_phi || !target->can_elide_SEL_phi(j)) {
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1684
              phi = ensure_phi(j, nophi);
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1685
            }
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1686
          }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1687
          break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1688
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1689
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1690
      // At this point, n might be top if:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1691
      //  - there is no phi (because TypeFlow detected a conflict), or
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1692
      //  - the corresponding control edges is top (a dead incoming path)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1693
      // It is a bug if we create a phi which sees a garbage value on a live path.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1694
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1695
      if (phi != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1696
        assert(n != top() || r->in(pnum) == top(), "live value must not be garbage");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1697
        assert(phi->region() == r, "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1698
        phi->set_req(pnum, n);  // Then add 'n' to the merge
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1699
        if (pnum == PhiNode::Input) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1700
          // Last merge for this Phi.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1701
          // So far, Phis have had a reasonable type from ciTypeFlow.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1702
          // Now _gvn will join that with the meet of current inputs.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1703
          // BOTTOM is never permissible here, 'cause pessimistically
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1704
          // Phis of pointers cannot lose the basic pointer type.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1705
          debug_only(const Type* bt1 = phi->bottom_type());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1706
          assert(bt1 != Type::BOTTOM, "should not be building conflict phis");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1707
          map()->set_req(j, _gvn.transform_no_reclaim(phi));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1708
          debug_only(const Type* bt2 = phi->bottom_type());
22799
83e58bac7980 8027422: assert(_gvn.type(obj)->higher_equal(tjp)) failed: cast_up is no longer needed
roland
parents: 22234
diff changeset
  1709
          assert(bt2->higher_equal_speculative(bt1), "must be consistent with type-flow");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1710
          record_for_igvn(phi);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1711
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1712
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1713
    } // End of for all values to be merged
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1714
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1715
    if (pnum == PhiNode::Input &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1716
        !r->in(0)) {         // The occasional useless Region
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1717
      assert(control() == r, "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1718
      set_control(r->nonnull_req());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1719
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1720
24946
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
  1721
    map()->merge_replaced_nodes_with(newin);
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
  1722
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1723
    // newin has been subsumed into the lazy merge, and is now dead.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1724
    set_block(save_block);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1725
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1726
    stop();                     // done with this guy, for now
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1727
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1728
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1729
  if (TraceOptoParse) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1730
    tty->print_cr(" on path %d", pnum);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1731
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1732
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1733
  // Done with this parser state.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1734
  assert(stopped(), "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1735
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1736
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1737
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1738
//--------------------------merge_memory_edges---------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1739
void Parse::merge_memory_edges(MergeMemNode* n, int pnum, bool nophi) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1740
  // (nophi means we must not create phis, because we already parsed here)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1741
  assert(n != NULL, "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1742
  // Merge the inputs to the MergeMems
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1743
  MergeMemNode* m = merged_memory();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1744
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1745
  assert(control()->is_Region(), "must be merging to a region");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1746
  RegionNode* r = control()->as_Region();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1747
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1748
  PhiNode* base = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1749
  MergeMemNode* remerge = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1750
  for (MergeMemStream mms(m, n); mms.next_non_empty2(); ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1751
    Node *p = mms.force_memory();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1752
    Node *q = mms.memory2();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1753
    if (mms.is_empty() && nophi) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1754
      // Trouble:  No new splits allowed after a loop body is parsed.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1755
      // Instead, wire the new split into a MergeMem on the backedge.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1756
      // The optimizer will sort it out, slicing the phi.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1757
      if (remerge == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1758
        assert(base != NULL, "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1759
        assert(base->in(0) != NULL, "should not be xformed away");
25930
eae8b7490d2c 8054033: Remove unused references to Compile*
thartmann
parents: 25917
diff changeset
  1760
        remerge = MergeMemNode::make(base->in(pnum));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1761
        gvn().set_type(remerge, Type::MEMORY);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1762
        base->set_req(pnum, remerge);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1763
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1764
      remerge->set_memory_at(mms.alias_idx(), q);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1765
      continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1766
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1767
    assert(!q->is_MergeMem(), "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1768
    PhiNode* phi;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1769
    if (p != q) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1770
      phi = ensure_memory_phi(mms.alias_idx(), nophi);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1771
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1772
      if (p->is_Phi() && p->as_Phi()->region() == r)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1773
        phi = p->as_Phi();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1774
      else
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1775
        phi = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1776
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1777
    // Insert q into local phi
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1778
    if (phi != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1779
      assert(phi->region() == r, "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1780
      p = phi;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1781
      phi->set_req(pnum, q);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1782
      if (mms.at_base_memory()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1783
        base = phi;  // delay transforming it
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1784
      } else if (pnum == 1) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1785
        record_for_igvn(phi);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1786
        p = _gvn.transform_no_reclaim(phi);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1787
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1788
      mms.set_memory(p);// store back through the iterator
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1789
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1790
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1791
  // Transform base last, in case we must fiddle with remerging.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1792
  if (base != NULL && pnum == 1) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1793
    record_for_igvn(base);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1794
    m->set_base_memory( _gvn.transform_no_reclaim(base) );
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1795
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1796
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1797
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1798
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1799
//------------------------ensure_phis_everywhere-------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1800
void Parse::ensure_phis_everywhere() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1801
  ensure_phi(TypeFunc::I_O);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1802
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1803
  // Ensure a phi on all currently known memories.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1804
  for (MergeMemStream mms(merged_memory()); mms.next_non_empty(); ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1805
    ensure_memory_phi(mms.alias_idx());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1806
    debug_only(mms.set_memory());  // keep the iterator happy
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1807
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1808
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1809
  // Note:  This is our only chance to create phis for memory slices.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1810
  // If we miss a slice that crops up later, it will have to be
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1811
  // merged into the base-memory phi that we are building here.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1812
  // Later, the optimizer will comb out the knot, and build separate
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1813
  // phi-loops for each memory slice that matters.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1814
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1815
  // Monitors must nest nicely and not get confused amongst themselves.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1816
  // Phi-ify everything up to the monitors, though.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1817
  uint monoff = map()->jvms()->monoff();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1818
  uint nof_monitors = map()->jvms()->nof_monitors();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1819
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1820
  assert(TypeFunc::Parms == map()->jvms()->locoff(), "parser map should contain only youngest jvms");
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1821
  bool check_elide_phi = block()->is_SEL_head();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1822
  for (uint i = TypeFunc::Parms; i < monoff; i++) {
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1823
    if (!check_elide_phi || !block()->can_elide_SEL_phi(i)) {
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1824
      ensure_phi(i);
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1825
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1826
  }
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
  1827
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1828
  // Even monitors need Phis, though they are well-structured.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1829
  // This is true for OSR methods, and also for the rare cases where
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1830
  // a monitor object is the subject of a replace_in_map operation.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1831
  // See bugs 4426707 and 5043395.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1832
  for (uint m = 0; m < nof_monitors; m++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1833
    ensure_phi(map()->jvms()->monitor_obj_offset(m));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1834
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1835
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1836
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1837
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1838
//-----------------------------add_new_path------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1839
// Add a previously unaccounted predecessor to this block.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1840
int Parse::Block::add_new_path() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1841
  // If there is no map, return the lowest unused path number.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1842
  if (!is_merged())  return pred_count()+1;  // there will be a map shortly
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1843
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1844
  SafePointNode* map = start_map();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1845
  if (!map->control()->is_Region())
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1846
    return pred_count()+1;  // there may be a region some day
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1847
  RegionNode* r = map->control()->as_Region();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1848
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1849
  // Add new path to the region.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1850
  uint pnum = r->req();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1851
  r->add_req(NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1852
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1853
  for (uint i = 1; i < map->req(); i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1854
    Node* n = map->in(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1855
    if (i == TypeFunc::Memory) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1856
      // Ensure a phi on all currently known memories.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1857
      for (MergeMemStream mms(n->as_MergeMem()); mms.next_non_empty(); ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1858
        Node* phi = mms.memory();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1859
        if (phi->is_Phi() && phi->as_Phi()->region() == r) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1860
          assert(phi->req() == pnum, "must be same size as region");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1861
          phi->add_req(NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1862
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1863
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1864
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1865
      if (n->is_Phi() && n->as_Phi()->region() == r) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1866
        assert(n->req() == pnum, "must be same size as region");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1867
        n->add_req(NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1868
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1869
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1870
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1871
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1872
  return pnum;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1873
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1874
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1875
//------------------------------ensure_phi-------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1876
// Turn the idx'th entry of the current map into a Phi
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1877
PhiNode *Parse::ensure_phi(int idx, bool nocreate) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1878
  SafePointNode* map = this->map();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1879
  Node* region = map->control();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1880
  assert(region->is_Region(), "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1881
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1882
  Node* o = map->in(idx);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1883
  assert(o != NULL, "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1884
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1885
  if (o == top())  return NULL; // TOP always merges into TOP
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1886
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1887
  if (o->is_Phi() && o->as_Phi()->region() == region) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1888
    return o->as_Phi();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1889
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1890
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1891
  // Now use a Phi here for merging
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1892
  assert(!nocreate, "Cannot build a phi for a block already parsed.");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1893
  const JVMState* jvms = map->jvms();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1894
  const Type* t;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1895
  if (jvms->is_loc(idx)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1896
    t = block()->local_type_at(idx - jvms->locoff());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1897
  } else if (jvms->is_stk(idx)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1898
    t = block()->stack_type_at(idx - jvms->stkoff());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1899
  } else if (jvms->is_mon(idx)) {
11458
5ba160829cef 7128355: assert(!nocreate) failed: Cannot build a phi for a block already parsed
kvn
parents: 11445
diff changeset
  1900
    assert(!jvms->is_monitor_box(idx), "no phis for boxes");
5ba160829cef 7128355: assert(!nocreate) failed: Cannot build a phi for a block already parsed
kvn
parents: 11445
diff changeset
  1901
    t = TypeInstPtr::BOTTOM; // this is sufficient for a lock object
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1902
  } else if ((uint)idx < TypeFunc::Parms) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1903
    t = o->bottom_type();  // Type::RETURN_ADDRESS or such-like.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1904
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1905
    assert(false, "no type information for this phi");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1906
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1907
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1908
  // If the type falls to bottom, then this must be a local that
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1909
  // is mixing ints and oops or some such.  Forcing it to top
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1910
  // makes it go dead.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1911
  if (t == Type::BOTTOM) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1912
    map->set_req(idx, top());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1913
    return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1914
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1915
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1916
  // Do not create phis for top either.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1917
  // A top on a non-null control flow must be an unused even after the.phi.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1918
  if (t == Type::TOP || t == Type::HALF) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1919
    map->set_req(idx, top());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1920
    return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1921
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1922
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1923
  PhiNode* phi = PhiNode::make(region, o, t);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1924
  gvn().set_type(phi, t);
211
e2b60448c234 6667610: (Escape Analysis) retry compilation without EA if it fails
kvn
parents: 1
diff changeset
  1925
  if (C->do_escape_analysis()) record_for_igvn(phi);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1926
  map->set_req(idx, phi);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1927
  return phi;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1928
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1929
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1930
//--------------------------ensure_memory_phi----------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1931
// Turn the idx'th slice of the current memory into a Phi
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1932
PhiNode *Parse::ensure_memory_phi(int idx, bool nocreate) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1933
  MergeMemNode* mem = merged_memory();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1934
  Node* region = control();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1935
  assert(region->is_Region(), "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1936
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1937
  Node *o = (idx == Compile::AliasIdxBot)? mem->base_memory(): mem->memory_at(idx);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1938
  assert(o != NULL && o != top(), "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1939
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1940
  PhiNode* phi;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1941
  if (o->is_Phi() && o->as_Phi()->region() == region) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1942
    phi = o->as_Phi();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1943
    if (phi == mem->base_memory() && idx >= Compile::AliasIdxRaw) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1944
      // clone the shared base memory phi to make a new memory split
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1945
      assert(!nocreate, "Cannot build a phi for a block already parsed.");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1946
      const Type* t = phi->bottom_type();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1947
      const TypePtr* adr_type = C->get_adr_type(idx);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1948
      phi = phi->slice_memory(adr_type);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1949
      gvn().set_type(phi, t);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1950
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1951
    return phi;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1952
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1953
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1954
  // Now use a Phi here for merging
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1955
  assert(!nocreate, "Cannot build a phi for a block already parsed.");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1956
  const Type* t = o->bottom_type();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1957
  const TypePtr* adr_type = C->get_adr_type(idx);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1958
  phi = PhiNode::make(region, o, t, adr_type);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1959
  gvn().set_type(phi, t);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1960
  if (idx == Compile::AliasIdxBot)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1961
    mem->set_base_memory(phi);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1962
  else
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1963
    mem->set_memory_at(idx, phi);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1964
  return phi;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1965
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1966
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1967
//------------------------------call_register_finalizer-----------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1968
// Check the klass of the receiver and call register_finalizer if the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1969
// class need finalization.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1970
void Parse::call_register_finalizer() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1971
  Node* receiver = local(0);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1972
  assert(receiver != NULL && receiver->bottom_type()->isa_instptr() != NULL,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1973
         "must have non-null instance type");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1974
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1975
  const TypeInstPtr *tinst = receiver->bottom_type()->isa_instptr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1976
  if (tinst != NULL && tinst->klass()->is_loaded() && !tinst->klass_is_exact()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1977
    // The type isn't known exactly so see if CHA tells us anything.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1978
    ciInstanceKlass* ik = tinst->klass()->as_instance_klass();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1979
    if (!Dependencies::has_finalizable_subclass(ik)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1980
      // No finalizable subclasses so skip the dynamic check.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1981
      C->dependencies()->assert_has_no_finalizable_subclasses(ik);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1982
      return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1983
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1984
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1985
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1986
  // Insert a dynamic test for whether the instance needs
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1987
  // finalization.  In general this will fold up since the concrete
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1988
  // class is often visible so the access flags are constant.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1989
  Node* klass_addr = basic_plus_adr( receiver, receiver, oopDesc::klass_offset_in_bytes() );
590
2954744d7bba 6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents: 211
diff changeset
  1990
  Node* klass = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), klass_addr, TypeInstPtr::KLASS) );
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1991
11430
718fc06da49a 7118863: Move sizeof(klassOopDesc) into the *Klass::*_offset_in_bytes() functions
stefank
parents: 9446
diff changeset
  1992
  Node* access_flags_addr = basic_plus_adr(klass, klass, in_bytes(Klass::access_flags_offset()));
22845
d8812d0ff387 8024921: PPC64 (part 113): Extend Load and Store nodes to know about memory ordering
goetz
parents: 21099
diff changeset
  1993
  Node* access_flags = make_load(NULL, access_flags_addr, TypeInt::INT, T_INT, MemNode::unordered);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1994
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
  1995
  Node* mask  = _gvn.transform(new AndINode(access_flags, intcon(JVM_ACC_HAS_FINALIZER)));
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
  1996
  Node* check = _gvn.transform(new CmpINode(mask, intcon(0)));
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
  1997
  Node* test  = _gvn.transform(new BoolNode(check, BoolTest::ne));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1998
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1999
  IfNode* iff = create_and_map_if(control(), test, PROB_MAX, COUNT_UNKNOWN);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2000
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
  2001
  RegionNode* result_rgn = new RegionNode(3);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2002
  record_for_igvn(result_rgn);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2003
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
  2004
  Node *skip_register = _gvn.transform(new IfFalseNode(iff));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2005
  result_rgn->init_req(1, skip_register);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2006
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
  2007
  Node *needs_register = _gvn.transform(new IfTrueNode(iff));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2008
  set_control(needs_register);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2009
  if (stopped()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2010
    // There is no slow path.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2011
    result_rgn->init_req(2, top());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2012
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2013
    Node *call = make_runtime_call(RC_NO_LEAF,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2014
                                   OptoRuntime::register_finalizer_Type(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2015
                                   OptoRuntime::register_finalizer_Java(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2016
                                   NULL, TypePtr::BOTTOM,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2017
                                   receiver);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2018
    make_slow_call_ex(call, env()->Throwable_klass(), true);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2019
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2020
    Node* fast_io  = call->in(TypeFunc::I_O);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2021
    Node* fast_mem = call->in(TypeFunc::Memory);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2022
    // These two phis are pre-filled with copies of of the fast IO and Memory
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2023
    Node* io_phi   = PhiNode::make(result_rgn, fast_io,  Type::ABIO);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2024
    Node* mem_phi  = PhiNode::make(result_rgn, fast_mem, Type::MEMORY, TypePtr::BOTTOM);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2025
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2026
    result_rgn->init_req(2, control());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2027
    io_phi    ->init_req(2, i_o());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2028
    mem_phi   ->init_req(2, reset_memory());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2029
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2030
    set_all_memory( _gvn.transform(mem_phi) );
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2031
    set_i_o(        _gvn.transform(io_phi) );
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2032
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2033
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2034
  set_control( _gvn.transform(result_rgn) );
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2035
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2036
23491
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2037
// Add check to deoptimize if RTM state is not ProfileRTM
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2038
void Parse::rtm_deopt() {
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2039
#if INCLUDE_RTM_OPT
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2040
  if (C->profile_rtm()) {
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2041
    assert(C->method() != NULL, "only for normal compilations");
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2042
    assert(!C->method()->method_data()->is_empty(), "MDO is needed to record RTM state");
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2043
    assert(depth() == 1, "generate check only for main compiled method");
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2044
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2045
    // Set starting bci for uncommon trap.
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2046
    set_parse_bci(is_osr_parse() ? osr_bci() : 0);
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2047
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2048
    // Load the rtm_state from the MethodData.
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2049
    const TypePtr* adr_type = TypeMetadataPtr::make(C->method()->method_data());
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2050
    Node* mdo = makecon(adr_type);
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2051
    int offset = MethodData::rtm_state_offset_in_bytes();
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2052
    Node* adr_node = basic_plus_adr(mdo, mdo, offset);
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2053
    Node* rtm_state = make_load(control(), adr_node, TypeInt::INT, T_INT, adr_type, MemNode::unordered);
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2054
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2055
    // Separate Load from Cmp by Opaque.
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2056
    // In expand_macro_nodes() it will be replaced either
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2057
    // with this load when there are locks in the code
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2058
    // or with ProfileRTM (cmp->in(2)) otherwise so that
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2059
    // the check will fold.
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2060
    Node* profile_state = makecon(TypeInt::make(ProfileRTM));
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
  2061
    Node* opq   = _gvn.transform( new Opaque3Node(C, rtm_state, Opaque3Node::RTM_OPT) );
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
  2062
    Node* chk   = _gvn.transform( new CmpINode(opq, profile_state) );
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
  2063
    Node* tst   = _gvn.transform( new BoolNode(chk, BoolTest::eq) );
23491
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2064
    // Branch to failure if state was changed
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2065
    { BuildCutout unless(this, tst, PROB_ALWAYS);
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2066
      uncommon_trap(Deoptimization::Reason_rtm_state_change,
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2067
                    Deoptimization::Action_make_not_entrant);
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2068
    }
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2069
  }
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2070
#endif
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2071
}
f690330b10b9 8031320: Use Intel RTM instructions for locks
kvn
parents: 23190
diff changeset
  2072
24442
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2073
void Parse::decrement_age() {
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2074
  MethodCounters* mc = method()->ensure_method_counters();
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2075
  if (mc == NULL) {
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2076
    C->record_failure("Must have MCs");
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2077
    return;
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2078
  }
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2079
  assert(!is_osr_parse(), "Not doing this for OSRs");
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2080
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2081
  // Set starting bci for uncommon trap.
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2082
  set_parse_bci(0);
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2083
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2084
  const TypePtr* adr_type = TypeRawPtr::make((address)mc);
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2085
  Node* mc_adr = makecon(adr_type);
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2086
  Node* cnt_adr = basic_plus_adr(mc_adr, mc_adr, in_bytes(MethodCounters::nmethod_age_offset()));
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2087
  Node* cnt = make_load(control(), cnt_adr, TypeInt::INT, T_INT, adr_type, MemNode::unordered);
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
  2088
  Node* decr = _gvn.transform(new SubINode(cnt, makecon(TypeInt::ONE)));
24442
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2089
  store_to_memory(control(), cnt_adr, decr, T_INT, adr_type, MemNode::unordered);
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
  2090
  Node *chk   = _gvn.transform(new CmpINode(decr, makecon(TypeInt::ZERO)));
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
  2091
  Node* tst   = _gvn.transform(new BoolNode(chk, BoolTest::gt));
24442
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2092
  { BuildCutout unless(this, tst, PROB_ALWAYS);
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2093
    uncommon_trap(Deoptimization::Reason_tenured,
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2094
                  Deoptimization::Action_make_not_entrant);
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2095
  }
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2096
}
4d4ae31dea26 8032463: VirtualDispatch test timeout with DeoptimizeALot
iveresov
parents: 24424
diff changeset
  2097
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2098
//------------------------------return_current---------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2099
// Append current _map to _exit_return
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2100
void Parse::return_current(Node* value) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2101
  if (RegisterFinalizersAtInit &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2102
      method()->intrinsic_id() == vmIntrinsics::_Object_init) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2103
    call_register_finalizer();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2104
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2105
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2106
  // Do not set_parse_bci, so that return goo is credited to the return insn.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2107
  set_bci(InvocationEntryBci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2108
  if (method()->is_synchronized() && GenerateSynchronizationCode) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2109
    shared_unlock(_synch_lock->box_node(), _synch_lock->obj_node());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2110
  }
2867
69187054225f 6788527: Server vm intermittently fails with assertion "live value must not be garbage" with fastdebug bits
kvn
parents: 2570
diff changeset
  2111
  if (C->env()->dtrace_method_probes()) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2112
    make_dtrace_method_exit(method());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2113
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2114
  SafePointNode* exit_return = _exits.map();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2115
  exit_return->in( TypeFunc::Control  )->add_req( control() );
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2116
  exit_return->in( TypeFunc::I_O      )->add_req( i_o    () );
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2117
  Node *mem = exit_return->in( TypeFunc::Memory   );
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2118
  for (MergeMemStream mms(mem->as_MergeMem(), merged_memory()); mms.next_non_empty2(); ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2119
    if (mms.is_empty()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2120
      // get a copy of the base memory, and patch just this one input
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2121
      const TypePtr* adr_type = mms.adr_type(C);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2122
      Node* phi = mms.force_memory()->as_Phi()->slice_memory(adr_type);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2123
      assert(phi->as_Phi()->region() == mms.base_memory()->in(0), "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2124
      gvn().set_type_bottom(phi);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2125
      phi->del_req(phi->req()-1);  // prepare to re-patch
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2126
      mms.set_memory(phi);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2127
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2128
    mms.memory()->add_req(mms.memory2());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2129
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2130
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2131
  // frame pointer is always same, already captured
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2132
  if (value != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2133
    // If returning oops to an interface-return, there is a silent free
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2134
    // cast from oop to interface allowed by the Verifier.  Make it explicit
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2135
    // here.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2136
    Node* phi = _exits.argument(0);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2137
    const TypeInstPtr *tr = phi->bottom_type()->isa_instptr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2138
    if( tr && tr->klass()->is_loaded() &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2139
        tr->klass()->is_interface() ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2140
      const TypeInstPtr *tp = value->bottom_type()->isa_instptr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2141
      if (tp && tp->klass()->is_loaded() &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2142
          !tp->klass()->is_interface()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2143
        // sharpen the type eagerly; this eases certain assert checking
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2144
        if (tp->higher_equal(TypeInstPtr::NOTNULL))
22799
83e58bac7980 8027422: assert(_gvn.type(obj)->higher_equal(tjp)) failed: cast_up is no longer needed
roland
parents: 22234
diff changeset
  2145
          tr = tr->join_speculative(TypeInstPtr::NOTNULL)->is_instptr();
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
  2146
        value = _gvn.transform(new CheckCastPPNode(0,value,tr));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2147
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2148
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2149
    phi->add_req(value);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2150
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2151
24946
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
  2152
  if (_first_return) {
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
  2153
    _exits.map()->transfer_replaced_nodes_from(map(), _new_idx);
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
  2154
    _first_return = false;
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
  2155
  } else {
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
  2156
    _exits.map()->merge_replaced_nodes_with(map());
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
  2157
  }
24b68ccf3fc4 8026796: Make replace_in_map() on parent maps generic
roland
parents: 24923
diff changeset
  2158
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2159
  stop_and_kill_map();          // This CFG path dies here
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2160
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2161
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2162
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2163
//------------------------------add_safepoint----------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2164
void Parse::add_safepoint() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2165
  // See if we can avoid this safepoint.  No need for a SafePoint immediately
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2166
  // after a Call (except Leaf Call) or another SafePoint.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2167
  Node *proj = control();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2168
  bool add_poll_param = SafePointNode::needs_polling_address_input();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2169
  uint parms = add_poll_param ? TypeFunc::Parms+1 : TypeFunc::Parms;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2170
  if( proj->is_Proj() ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2171
    Node *n0 = proj->in(0);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2172
    if( n0->is_Catch() ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2173
      n0 = n0->in(0)->in(0);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2174
      assert( n0->is_Call(), "expect a call here" );
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2175
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2176
    if( n0->is_Call() ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2177
      if( n0->as_Call()->guaranteed_safepoint() )
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2178
        return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2179
    } else if( n0->is_SafePoint() && n0->req() >= parms ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2180
      return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2181
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2182
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2183
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2184
  // Clear out dead values from the debug info.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2185
  kill_dead_locals();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2186
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2187
  // Clone the JVM State
24923
9631f7d691dc 8034812: remove IDX_INIT macro hack in Node class
thartmann
parents: 24442
diff changeset
  2188
  SafePointNode *sfpnt = new SafePointNode(parms, NULL);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2189
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2190
  // Capture memory state BEFORE a SafePoint.  Since we can block at a
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2191
  // SafePoint we need our GC state to be safe; i.e. we need all our current
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2192
  // write barriers (card marks) to not float down after the SafePoint so we
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2193
  // must read raw memory.  Likewise we need all oop stores to match the card
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2194
  // marks.  If deopt can happen, we need ALL stores (we need the correct JVM
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2195
  // state on a deopt).
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2196
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2197
  // We do not need to WRITE the memory state after a SafePoint.  The control
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2198
  // edge will keep card-marks and oop-stores from floating up from below a
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2199
  // SafePoint and our true dependency added here will keep them from floating
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2200
  // down below a SafePoint.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2201
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2202
  // Clone the current memory state
25930
eae8b7490d2c 8054033: Remove unused references to Compile*
thartmann
parents: 25917
diff changeset
  2203
  Node* mem = MergeMemNode::make(map()->memory());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2204
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2205
  mem = _gvn.transform(mem);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2206
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2207
  // Pass control through the safepoint
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2208
  sfpnt->init_req(TypeFunc::Control  , control());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2209
  // Fix edges normally used by a call
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2210
  sfpnt->init_req(TypeFunc::I_O      , top() );
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2211
  sfpnt->init_req(TypeFunc::Memory   , mem   );
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2212
  sfpnt->init_req(TypeFunc::ReturnAdr, top() );
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2213
  sfpnt->init_req(TypeFunc::FramePtr , top() );
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2214
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2215
  // Create a node for the polling address
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2216
  if( add_poll_param ) {
25930
eae8b7490d2c 8054033: Remove unused references to Compile*
thartmann
parents: 25917
diff changeset
  2217
    Node *polladr = ConPNode::make((address)os::get_polling_page());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2218
    sfpnt->init_req(TypeFunc::Parms+0, _gvn.transform(polladr));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2219
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2220
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2221
  // Fix up the JVM State edges
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2222
  add_safepoint_edges(sfpnt);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2223
  Node *transformed_sfpnt = _gvn.transform(sfpnt);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2224
  set_control(transformed_sfpnt);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2225
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2226
  // Provide an edge from root to safepoint.  This makes the safepoint
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2227
  // appear useful until the parse has completed.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2228
  if( OptoRemoveUseless && transformed_sfpnt->is_SafePoint() ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2229
    assert(C->root() != NULL, "Expect parse is still valid");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2230
    C->root()->add_prec(transformed_sfpnt);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2231
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2232
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2233
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2234
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2235
//------------------------show_parse_info--------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2236
void Parse::show_parse_info() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2237
  InlineTree* ilt = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2238
  if (C->ilt() != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2239
    JVMState* caller_jvms = is_osr_parse() ? caller()->caller() : caller();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2240
    ilt = InlineTree::find_subtree_from_root(C->ilt(), caller_jvms, method());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2241
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2242
  if (PrintCompilation && Verbose) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2243
    if (depth() == 1) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2244
      if( ilt->count_inlines() ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2245
        tty->print("    __inlined %d (%d bytes)", ilt->count_inlines(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2246
                     ilt->count_inline_bcs());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2247
        tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2248
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2249
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2250
      if (method()->is_synchronized())         tty->print("s");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2251
      if (method()->has_exception_handlers())  tty->print("!");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2252
      // Check this is not the final compiled version
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2253
      if (C->trap_can_recompile()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2254
        tty->print("-");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2255
      } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2256
        tty->print(" ");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2257
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2258
      method()->print_short_name();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2259
      if (is_osr_parse()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2260
        tty->print(" @ %d", osr_bci());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2261
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2262
      tty->print(" (%d bytes)",method()->code_size());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2263
      if (ilt->count_inlines()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2264
        tty->print(" __inlined %d (%d bytes)", ilt->count_inlines(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2265
                   ilt->count_inline_bcs());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2266
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2267
      tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2268
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2269
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2270
  if (PrintOpto && (depth() == 1 || PrintOptoInlining)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2271
    // Print that we succeeded; suppress this message on the first osr parse.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2272
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2273
    if (method()->is_synchronized())         tty->print("s");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2274
    if (method()->has_exception_handlers())  tty->print("!");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2275
    // Check this is not the final compiled version
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2276
    if (C->trap_can_recompile() && depth() == 1) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2277
      tty->print("-");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2278
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2279
      tty->print(" ");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2280
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2281
    if( depth() != 1 ) { tty->print("   "); }  // missing compile count
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2282
    for (int i = 1; i < depth(); ++i) { tty->print("  "); }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2283
    method()->print_short_name();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2284
    if (is_osr_parse()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2285
      tty->print(" @ %d", osr_bci());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2286
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2287
    if (ilt->caller_bci() != -1) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2288
      tty->print(" @ %d", ilt->caller_bci());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2289
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2290
    tty->print(" (%d bytes)",method()->code_size());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2291
    if (ilt->count_inlines()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2292
      tty->print(" __inlined %d (%d bytes)", ilt->count_inlines(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2293
                 ilt->count_inline_bcs());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2294
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2295
    tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2296
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2297
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2298
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2299
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2300
//------------------------------dump-------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2301
// Dump information associated with the bytecodes of current _method
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2302
void Parse::dump() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2303
  if( method() != NULL ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2304
    // Iterate over bytecodes
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2305
    ciBytecodeStream iter(method());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2306
    for( Bytecodes::Code bc = iter.next(); bc != ciBytecodeStream::EOBC() ; bc = iter.next() ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2307
      dump_bci( iter.cur_bci() );
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2308
      tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2309
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2310
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2311
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2312
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2313
// Dump information associated with a byte code index, 'bci'
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2314
void Parse::dump_bci(int bci) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2315
  // Output info on merge-points, cloning, and within _jsr..._ret
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2316
  // NYI
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2317
  tty->print(" bci:%d", bci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2318
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2319
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2320
#endif