hotspot/src/share/vm/opto/lcm.cpp
author kvn
Tue, 05 Nov 2013 17:38:04 -0800
changeset 22838 82c7497fbad4
parent 22828 17ecb098bc1e
parent 20289 35d78de0c547
child 22852 1063026e8cee
permissions -rw-r--r--
Merge
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/*
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 * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "memory/allocation.inline.hpp"
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#include "opto/block.hpp"
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#include "opto/c2compiler.hpp"
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#include "opto/callnode.hpp"
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#include "opto/cfgnode.hpp"
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#include "opto/machnode.hpp"
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#include "opto/runtime.hpp"
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#ifdef TARGET_ARCH_MODEL_x86_32
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# include "adfiles/ad_x86_32.hpp"
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#endif
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#ifdef TARGET_ARCH_MODEL_x86_64
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# include "adfiles/ad_x86_64.hpp"
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#endif
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#ifdef TARGET_ARCH_MODEL_sparc
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# include "adfiles/ad_sparc.hpp"
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#endif
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#ifdef TARGET_ARCH_MODEL_zero
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# include "adfiles/ad_zero.hpp"
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#endif
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#ifdef TARGET_ARCH_MODEL_arm
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# include "adfiles/ad_arm.hpp"
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#endif
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#ifdef TARGET_ARCH_MODEL_ppc_32
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# include "adfiles/ad_ppc_32.hpp"
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#endif
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#ifdef TARGET_ARCH_MODEL_ppc_64
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# include "adfiles/ad_ppc_64.hpp"
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#endif
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// Optimization - Graph Style
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//------------------------------implicit_null_check----------------------------
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// Detect implicit-null-check opportunities.  Basically, find NULL checks
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// with suitable memory ops nearby.  Use the memory op to do the NULL check.
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// I can generate a memory op if there is not one nearby.
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// The proj is the control projection for the not-null case.
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// The val is the pointer being checked for nullness or
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// decodeHeapOop_not_null node if it did not fold into address.
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void PhaseCFG::implicit_null_check(Block* block, Node *proj, Node *val, int allowed_reasons) {
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  // Assume if null check need for 0 offset then always needed
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  // Intel solaris doesn't support any null checks yet and no
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  // mechanism exists (yet) to set the switches at an os_cpu level
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  if( !ImplicitNullChecks || MacroAssembler::needs_explicit_null_check(0)) return;
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  // Make sure the ptr-is-null path appears to be uncommon!
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  float f = block->end()->as_MachIf()->_prob;
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  if( proj->Opcode() == Op_IfTrue ) f = 1.0f - f;
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  if( f > PROB_UNLIKELY_MAG(4) ) return;
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  uint bidx = 0;                // Capture index of value into memop
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  bool was_store;               // Memory op is a store op
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  // Get the successor block for if the test ptr is non-null
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  Block* not_null_block;  // this one goes with the proj
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  Block* null_block;
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  if (block->get_node(block->number_of_nodes()-1) == proj) {
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    null_block     = block->_succs[0];
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    not_null_block = block->_succs[1];
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  } else {
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    assert(block->get_node(block->number_of_nodes()-2) == proj, "proj is one or the other");
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    not_null_block = block->_succs[0];
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    null_block     = block->_succs[1];
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  }
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  while (null_block->is_Empty() == Block::empty_with_goto) {
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    null_block     = null_block->_succs[0];
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  }
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  // Search the exception block for an uncommon trap.
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  // (See Parse::do_if and Parse::do_ifnull for the reason
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  // we need an uncommon trap.  Briefly, we need a way to
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  // detect failure of this optimization, as in 6366351.)
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  {
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    bool found_trap = false;
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    for (uint i1 = 0; i1 < null_block->number_of_nodes(); i1++) {
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      Node* nn = null_block->get_node(i1);
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      if (nn->is_MachCall() &&
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          nn->as_MachCall()->entry_point() == SharedRuntime::uncommon_trap_blob()->entry_point()) {
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        const Type* trtype = nn->in(TypeFunc::Parms)->bottom_type();
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        if (trtype->isa_int() && trtype->is_int()->is_con()) {
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          jint tr_con = trtype->is_int()->get_con();
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          Deoptimization::DeoptReason reason = Deoptimization::trap_request_reason(tr_con);
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          Deoptimization::DeoptAction action = Deoptimization::trap_request_action(tr_con);
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          assert((int)reason < (int)BitsPerInt, "recode bit map");
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          if (is_set_nth_bit(allowed_reasons, (int) reason)
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              && action != Deoptimization::Action_none) {
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            // This uncommon trap is sure to recompile, eventually.
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            // When that happens, C->too_many_traps will prevent
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            // this transformation from happening again.
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            found_trap = true;
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          }
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        }
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        break;
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      }
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    }
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    if (!found_trap) {
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      // We did not find an uncommon trap.
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      return;
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    }
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  }
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  // Check for decodeHeapOop_not_null node which did not fold into address
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  bool is_decoden = ((intptr_t)val) & 1;
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  val = (Node*)(((intptr_t)val) & ~1);
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  assert(!is_decoden || (val->in(0) == NULL) && val->is_Mach() &&
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         (val->as_Mach()->ideal_Opcode() == Op_DecodeN), "sanity");
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  // Search the successor block for a load or store who's base value is also
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  // the tested value.  There may be several.
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  Node_List *out = new Node_List(Thread::current()->resource_area());
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  MachNode *best = NULL;        // Best found so far
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  for (DUIterator i = val->outs(); val->has_out(i); i++) {
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    Node *m = val->out(i);
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    if( !m->is_Mach() ) continue;
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    MachNode *mach = m->as_Mach();
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    was_store = false;
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    int iop = mach->ideal_Opcode();
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    switch( iop ) {
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    case Op_LoadB:
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    case Op_LoadUB:
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    case Op_LoadUS:
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    case Op_LoadD:
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    case Op_LoadF:
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    case Op_LoadI:
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    case Op_LoadL:
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    case Op_LoadP:
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    case Op_LoadN:
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    case Op_LoadS:
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    case Op_LoadKlass:
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    case Op_LoadNKlass:
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    case Op_LoadRange:
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    case Op_LoadD_unaligned:
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    case Op_LoadL_unaligned:
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      assert(mach->in(2) == val, "should be address");
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      break;
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    case Op_StoreB:
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    case Op_StoreC:
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    case Op_StoreCM:
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    case Op_StoreD:
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    case Op_StoreF:
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   166
    case Op_StoreI:
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   167
    case Op_StoreL:
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   168
    case Op_StoreP:
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parents: 1
diff changeset
   169
    case Op_StoreN:
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d2a189b83b87 7054512: Compress class pointers after perm gen removal
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parents: 13895
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   170
    case Op_StoreNKlass:
1
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   171
      was_store = true;         // Memory op is a store op
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   172
      // Stores will have their address in slot 2 (memory in slot 1).
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   173
      // If the value being nul-checked is in another slot, it means we
489c9b5090e2 Initial load
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   174
      // are storing the checked value, which does NOT check the value!
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parents:
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   175
      if( mach->in(2) != val ) continue;
489c9b5090e2 Initial load
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parents:
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   176
      break;                    // Found a memory op?
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parents:
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   177
    case Op_StrComp:
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parents: 2259
diff changeset
   178
    case Op_StrEquals:
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cfang
parents: 2259
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   179
    case Op_StrIndexOf:
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a2be4c89de81 6695049: (coll) Create an x86 intrinsic for Arrays.equals
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   180
    case Op_AryEq:
15242
695bb216be99 6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
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parents: 14623
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   181
    case Op_EncodeISOArray:
1
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   182
      // Not a legit memory op for implicit null check regardless of
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   183
      // embedded loads
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   184
      continue;
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   185
    default:                    // Also check for embedded loads
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   186
      if( !mach->needs_anti_dependence_check() )
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   187
        continue;               // Not an memory op; skip it
6188
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kvn
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diff changeset
   188
      if( must_clone[iop] ) {
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kvn
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diff changeset
   189
        // Do not move nodes which produce flags because
95ea4d66089a 6973329: C2 with Zero based COOP produces code with broken anti-dependency on x86
kvn
parents: 6180
diff changeset
   190
        // RA will try to clone it to place near branch and
95ea4d66089a 6973329: C2 with Zero based COOP produces code with broken anti-dependency on x86
kvn
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diff changeset
   191
        // it will cause recompilation, see clone_node().
95ea4d66089a 6973329: C2 with Zero based COOP produces code with broken anti-dependency on x86
kvn
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diff changeset
   192
        continue;
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kvn
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diff changeset
   193
      }
4580
db05951a970c 6912517: JIT bug compiles out (and stops running) code that needs to be run. Causes NPE.
kvn
parents: 4566
diff changeset
   194
      {
5698
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   195
        // Check that value is used in memory address in
091095915ee6 6954029: Improve implicit null check generation with compressed oops
kvn
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   196
        // instructions with embedded load (CmpP val1,(val2+off)).
4580
db05951a970c 6912517: JIT bug compiles out (and stops running) code that needs to be run. Causes NPE.
kvn
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diff changeset
   197
        Node* base;
db05951a970c 6912517: JIT bug compiles out (and stops running) code that needs to be run. Causes NPE.
kvn
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diff changeset
   198
        Node* index;
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diff changeset
   199
        const MachOper* oper = mach->memory_inputs(base, index);
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kvn
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diff changeset
   200
        if (oper == NULL || oper == (MachOper*)-1) {
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kvn
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diff changeset
   201
          continue;             // Not an memory op; skip it
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kvn
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diff changeset
   202
        }
db05951a970c 6912517: JIT bug compiles out (and stops running) code that needs to be run. Causes NPE.
kvn
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diff changeset
   203
        if (val == base ||
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kvn
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diff changeset
   204
            val == index && val->bottom_type()->isa_narrowoop()) {
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kvn
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   205
          break;                // Found it
db05951a970c 6912517: JIT bug compiles out (and stops running) code that needs to be run. Causes NPE.
kvn
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diff changeset
   206
        } else {
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kvn
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diff changeset
   207
          continue;             // Skip it
db05951a970c 6912517: JIT bug compiles out (and stops running) code that needs to be run. Causes NPE.
kvn
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diff changeset
   208
        }
db05951a970c 6912517: JIT bug compiles out (and stops running) code that needs to be run. Causes NPE.
kvn
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diff changeset
   209
      }
1
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   210
      break;
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diff changeset
   211
    }
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   212
    // check if the offset is not too high for implicit exception
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   213
    {
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   214
      intptr_t offset = 0;
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   215
      const TypePtr *adr_type = NULL;  // Do not need this return value here
489c9b5090e2 Initial load
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   216
      const Node* base = mach->get_base_and_disp(offset, adr_type);
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diff changeset
   217
      if (base == NULL || base == NodeSentinel) {
1136
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diff changeset
   218
        // Narrow oop address doesn't have base, only index
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kvn
parents: 961
diff changeset
   219
        if( val->bottom_type()->isa_narrowoop() &&
9f6351874414 6746907: Improve implicit null check generation
kvn
parents: 961
diff changeset
   220
            MacroAssembler::needs_explicit_null_check(offset) )
9f6351874414 6746907: Improve implicit null check generation
kvn
parents: 961
diff changeset
   221
          continue;             // Give up if offset is beyond page size
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   222
        // cannot reason about it; is probably not implicit null exception
489c9b5090e2 Initial load
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parents:
diff changeset
   223
      } else {
2254
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 2022
diff changeset
   224
        const TypePtr* tptr;
17384
4e6ea5fa04ad 8014189: JVM crash with SEGV in ConnectionGraph::record_for_escape_analysis()
kvn
parents: 15871
diff changeset
   225
        if (UseCompressedOops && (Universe::narrow_oop_shift() == 0 ||
4e6ea5fa04ad 8014189: JVM crash with SEGV in ConnectionGraph::record_for_escape_analysis()
kvn
parents: 15871
diff changeset
   226
                                  Universe::narrow_klass_shift() == 0)) {
2254
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 2022
diff changeset
   227
          // 32-bits narrow oop can be the base of address expressions
17384
4e6ea5fa04ad 8014189: JVM crash with SEGV in ConnectionGraph::record_for_escape_analysis()
kvn
parents: 15871
diff changeset
   228
          tptr = base->get_ptr_type();
2254
f13dda645a4b 6791178: Specialize for zero as the compressed oop vm heap base
kvn
parents: 2022
diff changeset
   229
        } else {
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kvn
parents: 2022
diff changeset
   230
          // only regular oops are expected here
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kvn
parents: 2022
diff changeset
   231
          tptr = base->bottom_type()->is_ptr();
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kvn
parents: 2022
diff changeset
   232
        }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   233
        // Give up if offset is not a compile-time constant
489c9b5090e2 Initial load
duke
parents:
diff changeset
   234
        if( offset == Type::OffsetBot || tptr->_offset == Type::OffsetBot )
489c9b5090e2 Initial load
duke
parents:
diff changeset
   235
          continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   236
        offset += tptr->_offset; // correct if base is offseted
489c9b5090e2 Initial load
duke
parents:
diff changeset
   237
        if( MacroAssembler::needs_explicit_null_check(offset) )
489c9b5090e2 Initial load
duke
parents:
diff changeset
   238
          continue;             // Give up is reference is beyond 4K page size
489c9b5090e2 Initial load
duke
parents:
diff changeset
   239
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   240
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   241
489c9b5090e2 Initial load
duke
parents:
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   242
    // Check ctrl input to see if the null-check dominates the memory op
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   243
    Block *cb = get_block_for_node(mach);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   244
    cb = cb->_idom;             // Always hoist at least 1 block
489c9b5090e2 Initial load
duke
parents:
diff changeset
   245
    if( !was_store ) {          // Stores can be hoisted only one block
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   246
      while( cb->_dom_depth > (block->_dom_depth + 1))
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   247
        cb = cb->_idom;         // Hoist loads as far as we want
489c9b5090e2 Initial load
duke
parents:
diff changeset
   248
      // The non-null-block should dominate the memory op, too. Live
489c9b5090e2 Initial load
duke
parents:
diff changeset
   249
      // range spilling will insert a spill in the non-null-block if it is
489c9b5090e2 Initial load
duke
parents:
diff changeset
   250
      // needs to spill the memory op for an implicit null check.
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   251
      if (cb->_dom_depth == (block->_dom_depth + 1)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   252
        if (cb != not_null_block) continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   253
        cb = cb->_idom;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   254
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   255
    }
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   256
    if( cb != block ) continue;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   257
489c9b5090e2 Initial load
duke
parents:
diff changeset
   258
    // Found a memory user; see if it can be hoisted to check-block
489c9b5090e2 Initial load
duke
parents:
diff changeset
   259
    uint vidx = 0;              // Capture index of value into memop
489c9b5090e2 Initial load
duke
parents:
diff changeset
   260
    uint j;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   261
    for( j = mach->req()-1; j > 0; j-- ) {
5698
091095915ee6 6954029: Improve implicit null check generation with compressed oops
kvn
parents: 4580
diff changeset
   262
      if( mach->in(j) == val ) {
091095915ee6 6954029: Improve implicit null check generation with compressed oops
kvn
parents: 4580
diff changeset
   263
        vidx = j;
091095915ee6 6954029: Improve implicit null check generation with compressed oops
kvn
parents: 4580
diff changeset
   264
        // Ignore DecodeN val which could be hoisted to where needed.
091095915ee6 6954029: Improve implicit null check generation with compressed oops
kvn
parents: 4580
diff changeset
   265
        if( is_decoden ) continue;
091095915ee6 6954029: Improve implicit null check generation with compressed oops
kvn
parents: 4580
diff changeset
   266
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   267
      // Block of memory-op input
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   268
      Block *inb = get_block_for_node(mach->in(j));
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   269
      Block *b = block;          // Start from nul check
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   270
      while( b != inb && b->_dom_depth > inb->_dom_depth )
489c9b5090e2 Initial load
duke
parents:
diff changeset
   271
        b = b->_idom;           // search upwards for input
489c9b5090e2 Initial load
duke
parents:
diff changeset
   272
      // See if input dominates null check
489c9b5090e2 Initial load
duke
parents:
diff changeset
   273
      if( b != inb )
489c9b5090e2 Initial load
duke
parents:
diff changeset
   274
        break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   275
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   276
    if( j > 0 )
489c9b5090e2 Initial load
duke
parents:
diff changeset
   277
      continue;
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   278
    Block *mb = get_block_for_node(mach);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   279
    // Hoisting stores requires more checks for the anti-dependence case.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   280
    // Give up hoisting if we have to move the store past any load.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   281
    if( was_store ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   282
      Block *b = mb;            // Start searching here for a local load
489c9b5090e2 Initial load
duke
parents:
diff changeset
   283
      // mach use (faulting) trying to hoist
489c9b5090e2 Initial load
duke
parents:
diff changeset
   284
      // n might be blocker to hoisting
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   285
      while( b != block ) {
1
489c9b5090e2 Initial load
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parents:
diff changeset
   286
        uint k;
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   287
        for( k = 1; k < b->number_of_nodes(); k++ ) {
19717
7819ffdaf0ff 8023691: Create interface for nodes in class Block
adlertz
parents: 19330
diff changeset
   288
          Node *n = b->get_node(k);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   289
          if( n->needs_anti_dependence_check() &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
   290
              n->in(LoadNode::Memory) == mach->in(StoreNode::Memory) )
489c9b5090e2 Initial load
duke
parents:
diff changeset
   291
            break;              // Found anti-dependent load
489c9b5090e2 Initial load
duke
parents:
diff changeset
   292
        }
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   293
        if( k < b->number_of_nodes() )
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   294
          break;                // Found anti-dependent load
489c9b5090e2 Initial load
duke
parents:
diff changeset
   295
        // Make sure control does not do a merge (would have to check allpaths)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   296
        if( b->num_preds() != 2 ) break;
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   297
        b = get_block_for_node(b->pred(1)); // Move up to predecessor block
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   298
      }
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   299
      if( b != block ) continue;
1
489c9b5090e2 Initial load
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parents:
diff changeset
   300
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   301
489c9b5090e2 Initial load
duke
parents:
diff changeset
   302
    // Make sure this memory op is not already being used for a NullCheck
489c9b5090e2 Initial load
duke
parents:
diff changeset
   303
    Node *e = mb->end();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   304
    if( e->is_MachNullCheck() && e->in(1) == mach )
489c9b5090e2 Initial load
duke
parents:
diff changeset
   305
      continue;                 // Already being used as a NULL check
489c9b5090e2 Initial load
duke
parents:
diff changeset
   306
489c9b5090e2 Initial load
duke
parents:
diff changeset
   307
    // Found a candidate!  Pick one with least dom depth - the highest
489c9b5090e2 Initial load
duke
parents:
diff changeset
   308
    // in the dom tree should be closest to the null check.
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   309
    if (best == NULL || get_block_for_node(mach)->_dom_depth < get_block_for_node(best)->_dom_depth) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   310
      best = mach;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   311
      bidx = vidx;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   312
    }
489c9b5090e2 Initial load
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parents:
diff changeset
   313
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   314
  // No candidate!
19279
4be3c2e6663c 8022284: Hide internal data structure in PhaseCFG
adlertz
parents: 17384
diff changeset
   315
  if (best == NULL) {
4be3c2e6663c 8022284: Hide internal data structure in PhaseCFG
adlertz
parents: 17384
diff changeset
   316
    return;
4be3c2e6663c 8022284: Hide internal data structure in PhaseCFG
adlertz
parents: 17384
diff changeset
   317
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   318
489c9b5090e2 Initial load
duke
parents:
diff changeset
   319
  // ---- Found an implicit null check
489c9b5090e2 Initial load
duke
parents:
diff changeset
   320
  extern int implicit_null_checks;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   321
  implicit_null_checks++;
489c9b5090e2 Initial load
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parents:
diff changeset
   322
5698
091095915ee6 6954029: Improve implicit null check generation with compressed oops
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parents: 4580
diff changeset
   323
  if( is_decoden ) {
091095915ee6 6954029: Improve implicit null check generation with compressed oops
kvn
parents: 4580
diff changeset
   324
    // Check if we need to hoist decodeHeapOop_not_null first.
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   325
    Block *valb = get_block_for_node(val);
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   326
    if( block != valb && block->_dom_depth < valb->_dom_depth ) {
5698
091095915ee6 6954029: Improve implicit null check generation with compressed oops
kvn
parents: 4580
diff changeset
   327
      // Hoist it up to the end of the test block.
091095915ee6 6954029: Improve implicit null check generation with compressed oops
kvn
parents: 4580
diff changeset
   328
      valb->find_remove(val);
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   329
      block->add_inst(val);
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   330
      map_node_to_block(val, block);
5698
091095915ee6 6954029: Improve implicit null check generation with compressed oops
kvn
parents: 4580
diff changeset
   331
      // DecodeN on x86 may kill flags. Check for flag-killing projections
091095915ee6 6954029: Improve implicit null check generation with compressed oops
kvn
parents: 4580
diff changeset
   332
      // that also need to be hoisted.
091095915ee6 6954029: Improve implicit null check generation with compressed oops
kvn
parents: 4580
diff changeset
   333
      for (DUIterator_Fast jmax, j = val->fast_outs(jmax); j < jmax; j++) {
091095915ee6 6954029: Improve implicit null check generation with compressed oops
kvn
parents: 4580
diff changeset
   334
        Node* n = val->fast_out(j);
10255
bab46e6f7661 7069452: Cleanup NodeFlags
kvn
parents: 10019
diff changeset
   335
        if( n->is_MachProj() ) {
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   336
          get_block_for_node(n)->find_remove(n);
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   337
          block->add_inst(n);
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   338
          map_node_to_block(n, block);
5698
091095915ee6 6954029: Improve implicit null check generation with compressed oops
kvn
parents: 4580
diff changeset
   339
        }
091095915ee6 6954029: Improve implicit null check generation with compressed oops
kvn
parents: 4580
diff changeset
   340
      }
091095915ee6 6954029: Improve implicit null check generation with compressed oops
kvn
parents: 4580
diff changeset
   341
    }
091095915ee6 6954029: Improve implicit null check generation with compressed oops
kvn
parents: 4580
diff changeset
   342
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   343
  // Hoist the memory candidate up to the end of the test block.
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   344
  Block *old_block = get_block_for_node(best);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   345
  old_block->find_remove(best);
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   346
  block->add_inst(best);
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   347
  map_node_to_block(best, block);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   348
489c9b5090e2 Initial load
duke
parents:
diff changeset
   349
  // Move the control dependence
19717
7819ffdaf0ff 8023691: Create interface for nodes in class Block
adlertz
parents: 19330
diff changeset
   350
  if (best->in(0) && best->in(0) == old_block->head())
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   351
    best->set_req(0, block->head());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   352
489c9b5090e2 Initial load
duke
parents:
diff changeset
   353
  // Check for flag-killing projections that also need to be hoisted
489c9b5090e2 Initial load
duke
parents:
diff changeset
   354
  // Should be DU safe because no edge updates.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   355
  for (DUIterator_Fast jmax, j = best->fast_outs(jmax); j < jmax; j++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   356
    Node* n = best->fast_out(j);
10255
bab46e6f7661 7069452: Cleanup NodeFlags
kvn
parents: 10019
diff changeset
   357
    if( n->is_MachProj() ) {
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   358
      get_block_for_node(n)->find_remove(n);
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   359
      block->add_inst(n);
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   360
      map_node_to_block(n, block);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   361
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   362
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   363
489c9b5090e2 Initial load
duke
parents:
diff changeset
   364
  // proj==Op_True --> ne test; proj==Op_False --> eq test.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   365
  // One of two graph shapes got matched:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   366
  //   (IfTrue  (If (Bool NE (CmpP ptr NULL))))
489c9b5090e2 Initial load
duke
parents:
diff changeset
   367
  //   (IfFalse (If (Bool EQ (CmpP ptr NULL))))
489c9b5090e2 Initial load
duke
parents:
diff changeset
   368
  // NULL checks are always branch-if-eq.  If we see a IfTrue projection
489c9b5090e2 Initial load
duke
parents:
diff changeset
   369
  // then we are replacing a 'ne' test with a 'eq' NULL check test.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   370
  // We need to flip the projections to keep the same semantics.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   371
  if( proj->Opcode() == Op_IfTrue ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   372
    // Swap order of projections in basic block to swap branch targets
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   373
    Node *tmp1 = block->get_node(block->end_idx()+1);
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   374
    Node *tmp2 = block->get_node(block->end_idx()+2);
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   375
    block->map_node(tmp2, block->end_idx()+1);
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   376
    block->map_node(tmp1, block->end_idx()+2);
13895
f6dfe4123709 7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents: 13104
diff changeset
   377
    Node *tmp = new (C) Node(C->top()); // Use not NULL input
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   378
    tmp1->replace_by(tmp);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   379
    tmp2->replace_by(tmp1);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   380
    tmp->replace_by(tmp2);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   381
    tmp->destruct();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   382
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   383
489c9b5090e2 Initial load
duke
parents:
diff changeset
   384
  // Remove the existing null check; use a new implicit null check instead.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   385
  // Since schedule-local needs precise def-use info, we need to correct
489c9b5090e2 Initial load
duke
parents:
diff changeset
   386
  // it as well.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   387
  Node *old_tst = proj->in(0);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   388
  MachNode *nul_chk = new (C) MachNullCheckNode(old_tst->in(0),best,bidx);
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   389
  block->map_node(nul_chk, block->end_idx());
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   390
  map_node_to_block(nul_chk, block);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   391
  // Redirect users of old_test to nul_chk
489c9b5090e2 Initial load
duke
parents:
diff changeset
   392
  for (DUIterator_Last i2min, i2 = old_tst->last_outs(i2min); i2 >= i2min; --i2)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   393
    old_tst->last_out(i2)->set_req(0, nul_chk);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   394
  // Clean-up any dead code
489c9b5090e2 Initial load
duke
parents:
diff changeset
   395
  for (uint i3 = 0; i3 < old_tst->req(); i3++)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   396
    old_tst->set_req(i3, NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   397
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   398
  latency_from_uses(nul_chk);
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   399
  latency_from_uses(best);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   400
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   401
489c9b5090e2 Initial load
duke
parents:
diff changeset
   402
489c9b5090e2 Initial load
duke
parents:
diff changeset
   403
//------------------------------select-----------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   404
// Select a nice fellow from the worklist to schedule next. If there is only
489c9b5090e2 Initial load
duke
parents:
diff changeset
   405
// one choice, then use it. Projections take top priority for correctness
489c9b5090e2 Initial load
duke
parents:
diff changeset
   406
// reasons - if I see a projection, then it is next.  There are a number of
489c9b5090e2 Initial load
duke
parents:
diff changeset
   407
// other special cases, for instructions that consume condition codes, et al.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   408
// These are chosen immediately. Some instructions are required to immediately
489c9b5090e2 Initial load
duke
parents:
diff changeset
   409
// precede the last instruction in the block, and these are taken last. Of the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   410
// remaining cases (most), choose the instruction with the greatest latency
489c9b5090e2 Initial load
duke
parents:
diff changeset
   411
// (that is, the most number of pseudo-cycles required to the end of the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   412
// routine). If there is a tie, choose the instruction with the most inputs.
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   413
Node* PhaseCFG::select(Block* block, Node_List &worklist, GrowableArray<int> &ready_cnt, VectorSet &next_call, uint sched_slot) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   414
489c9b5090e2 Initial load
duke
parents:
diff changeset
   415
  // If only a single entry on the stack, use it
489c9b5090e2 Initial load
duke
parents:
diff changeset
   416
  uint cnt = worklist.size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   417
  if (cnt == 1) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   418
    Node *n = worklist[0];
489c9b5090e2 Initial load
duke
parents:
diff changeset
   419
    worklist.map(0,worklist.pop());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   420
    return n;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   421
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   422
489c9b5090e2 Initial load
duke
parents:
diff changeset
   423
  uint choice  = 0; // Bigger is most important
489c9b5090e2 Initial load
duke
parents:
diff changeset
   424
  uint latency = 0; // Bigger is scheduled first
489c9b5090e2 Initial load
duke
parents:
diff changeset
   425
  uint score   = 0; // Bigger is better
961
7fb3b13d4205 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 670
diff changeset
   426
  int idx = -1;     // Index in worklist
15871
b04dd94da4e6 8009120: Fuzz instruction scheduling in HotSpot compilers
shade
parents: 15242
diff changeset
   427
  int cand_cnt = 0; // Candidate count
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   428
489c9b5090e2 Initial load
duke
parents:
diff changeset
   429
  for( uint i=0; i<cnt; i++ ) { // Inspect entire worklist
489c9b5090e2 Initial load
duke
parents:
diff changeset
   430
    // Order in worklist is used to break ties.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   431
    // See caller for how this is used to delay scheduling
489c9b5090e2 Initial load
duke
parents:
diff changeset
   432
    // of induction variable increments to after the other
489c9b5090e2 Initial load
duke
parents:
diff changeset
   433
    // uses of the phi are scheduled.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   434
    Node *n = worklist[i];      // Get Node on worklist
489c9b5090e2 Initial load
duke
parents:
diff changeset
   435
489c9b5090e2 Initial load
duke
parents:
diff changeset
   436
    int iop = n->is_Mach() ? n->as_Mach()->ideal_Opcode() : 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   437
    if( n->is_Proj() ||         // Projections always win
489c9b5090e2 Initial load
duke
parents:
diff changeset
   438
        n->Opcode()== Op_Con || // So does constant 'Top'
489c9b5090e2 Initial load
duke
parents:
diff changeset
   439
        iop == Op_CreateEx ||   // Create-exception must start block
489c9b5090e2 Initial load
duke
parents:
diff changeset
   440
        iop == Op_CheckCastPP
489c9b5090e2 Initial load
duke
parents:
diff changeset
   441
        ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   442
      worklist.map(i,worklist.pop());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   443
      return n;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   444
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   445
489c9b5090e2 Initial load
duke
parents:
diff changeset
   446
    // Final call in a block must be adjacent to 'catch'
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   447
    Node *e = block->end();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   448
    if( e->is_Catch() && e->in(0)->in(0) == n )
489c9b5090e2 Initial load
duke
parents:
diff changeset
   449
      continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   450
489c9b5090e2 Initial load
duke
parents:
diff changeset
   451
    // Memory op for an implicit null check has to be at the end of the block
489c9b5090e2 Initial load
duke
parents:
diff changeset
   452
    if( e->is_MachNullCheck() && e->in(1) == n )
489c9b5090e2 Initial load
duke
parents:
diff changeset
   453
      continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   454
13104
657b387034fb 7119644: Increase superword's vector size up to 256 bits
kvn
parents: 11567
diff changeset
   455
    // Schedule IV increment last.
657b387034fb 7119644: Increase superword's vector size up to 256 bits
kvn
parents: 11567
diff changeset
   456
    if (e->is_Mach() && e->as_Mach()->ideal_Opcode() == Op_CountedLoopEnd &&
657b387034fb 7119644: Increase superword's vector size up to 256 bits
kvn
parents: 11567
diff changeset
   457
        e->in(1)->in(1) == n && n->is_iteratively_computed())
657b387034fb 7119644: Increase superword's vector size up to 256 bits
kvn
parents: 11567
diff changeset
   458
      continue;
657b387034fb 7119644: Increase superword's vector size up to 256 bits
kvn
parents: 11567
diff changeset
   459
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   460
    uint n_choice  = 2;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   461
489c9b5090e2 Initial load
duke
parents:
diff changeset
   462
    // See if this instruction is consumed by a branch. If so, then (as the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   463
    // branch is the last instruction in the basic block) force it to the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   464
    // end of the basic block
489c9b5090e2 Initial load
duke
parents:
diff changeset
   465
    if ( must_clone[iop] ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   466
      // See if any use is a branch
489c9b5090e2 Initial load
duke
parents:
diff changeset
   467
      bool found_machif = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   468
489c9b5090e2 Initial load
duke
parents:
diff changeset
   469
      for (DUIterator_Fast jmax, j = n->fast_outs(jmax); j < jmax; j++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   470
        Node* use = n->fast_out(j);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   471
489c9b5090e2 Initial load
duke
parents:
diff changeset
   472
        // The use is a conditional branch, make them adjacent
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   473
        if (use->is_MachIf() && get_block_for_node(use) == block) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   474
          found_machif = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   475
          break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   476
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   477
20289
35d78de0c547 8024924: Intrinsify java.lang.Math.addExact
rbackman
parents: 19724
diff changeset
   478
        // For nodes that produce a FlagsProj, make the node adjacent to the
35d78de0c547 8024924: Intrinsify java.lang.Math.addExact
rbackman
parents: 19724
diff changeset
   479
        // use of the FlagsProj
35d78de0c547 8024924: Intrinsify java.lang.Math.addExact
rbackman
parents: 19724
diff changeset
   480
        if (use->is_FlagsProj() && get_block_for_node(use) == block) {
35d78de0c547 8024924: Intrinsify java.lang.Math.addExact
rbackman
parents: 19724
diff changeset
   481
          found_machif = true;
35d78de0c547 8024924: Intrinsify java.lang.Math.addExact
rbackman
parents: 19724
diff changeset
   482
          break;
35d78de0c547 8024924: Intrinsify java.lang.Math.addExact
rbackman
parents: 19724
diff changeset
   483
        }
35d78de0c547 8024924: Intrinsify java.lang.Math.addExact
rbackman
parents: 19724
diff changeset
   484
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   485
        // More than this instruction pending for successor to be ready,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   486
        // don't choose this if other opportunities are ready
11567
512b2c76e3b7 7116050: C2/ARM: memory stomping error with DivideMcTests
roland
parents: 11196
diff changeset
   487
        if (ready_cnt.at(use->_idx) > 1)
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   488
          n_choice = 1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   489
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   490
489c9b5090e2 Initial load
duke
parents:
diff changeset
   491
      // loop terminated, prefer not to use this instruction
489c9b5090e2 Initial load
duke
parents:
diff changeset
   492
      if (found_machif)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   493
        continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   494
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   495
489c9b5090e2 Initial load
duke
parents:
diff changeset
   496
    // See if this has a predecessor that is "must_clone", i.e. sets the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   497
    // condition code. If so, choose this first
489c9b5090e2 Initial load
duke
parents:
diff changeset
   498
    for (uint j = 0; j < n->req() ; j++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   499
      Node *inn = n->in(j);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   500
      if (inn) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   501
        if (inn->is_Mach() && must_clone[inn->as_Mach()->ideal_Opcode()] ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   502
          n_choice = 3;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   503
          break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   504
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   505
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   506
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   507
489c9b5090e2 Initial load
duke
parents:
diff changeset
   508
    // MachTemps should be scheduled last so they are near their uses
489c9b5090e2 Initial load
duke
parents:
diff changeset
   509
    if (n->is_MachTemp()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   510
      n_choice = 1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   511
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   512
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   513
    uint n_latency = get_latency_for_node(n);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   514
    uint n_score   = n->req();   // Many inputs get high score to break ties
489c9b5090e2 Initial load
duke
parents:
diff changeset
   515
489c9b5090e2 Initial load
duke
parents:
diff changeset
   516
    // Keep best latency found
15871
b04dd94da4e6 8009120: Fuzz instruction scheduling in HotSpot compilers
shade
parents: 15242
diff changeset
   517
    cand_cnt++;
b04dd94da4e6 8009120: Fuzz instruction scheduling in HotSpot compilers
shade
parents: 15242
diff changeset
   518
    if (choice < n_choice ||
b04dd94da4e6 8009120: Fuzz instruction scheduling in HotSpot compilers
shade
parents: 15242
diff changeset
   519
        (choice == n_choice &&
b04dd94da4e6 8009120: Fuzz instruction scheduling in HotSpot compilers
shade
parents: 15242
diff changeset
   520
         ((StressLCM && Compile::randomized_select(cand_cnt)) ||
b04dd94da4e6 8009120: Fuzz instruction scheduling in HotSpot compilers
shade
parents: 15242
diff changeset
   521
          (!StressLCM &&
b04dd94da4e6 8009120: Fuzz instruction scheduling in HotSpot compilers
shade
parents: 15242
diff changeset
   522
           (latency < n_latency ||
b04dd94da4e6 8009120: Fuzz instruction scheduling in HotSpot compilers
shade
parents: 15242
diff changeset
   523
            (latency == n_latency &&
b04dd94da4e6 8009120: Fuzz instruction scheduling in HotSpot compilers
shade
parents: 15242
diff changeset
   524
             (score < n_score))))))) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   525
      choice  = n_choice;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   526
      latency = n_latency;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   527
      score   = n_score;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   528
      idx     = i;               // Also keep index in worklist
489c9b5090e2 Initial load
duke
parents:
diff changeset
   529
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   530
  } // End of for all ready nodes in worklist
489c9b5090e2 Initial load
duke
parents:
diff changeset
   531
961
7fb3b13d4205 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 670
diff changeset
   532
  assert(idx >= 0, "index should be set");
7fb3b13d4205 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 670
diff changeset
   533
  Node *n = worklist[(uint)idx];      // Get the winner
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   534
961
7fb3b13d4205 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 670
diff changeset
   535
  worklist.map((uint)idx, worklist.pop());     // Compress worklist
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   536
  return n;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   537
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   538
489c9b5090e2 Initial load
duke
parents:
diff changeset
   539
489c9b5090e2 Initial load
duke
parents:
diff changeset
   540
//------------------------------set_next_call----------------------------------
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   541
void PhaseCFG::set_next_call(Block* block, Node* n, VectorSet& next_call) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   542
  if( next_call.test_set(n->_idx) ) return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   543
  for( uint i=0; i<n->len(); i++ ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   544
    Node *m = n->in(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   545
    if( !m ) continue;  // must see all nodes in block that precede call
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   546
    if (get_block_for_node(m) == block) {
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   547
      set_next_call(block, m, next_call);
19279
4be3c2e6663c 8022284: Hide internal data structure in PhaseCFG
adlertz
parents: 17384
diff changeset
   548
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   549
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   550
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   551
489c9b5090e2 Initial load
duke
parents:
diff changeset
   552
//------------------------------needed_for_next_call---------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   553
// Set the flag 'next_call' for each Node that is needed for the next call to
489c9b5090e2 Initial load
duke
parents:
diff changeset
   554
// be scheduled.  This flag lets me bias scheduling so Nodes needed for the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   555
// next subroutine call get priority - basically it moves things NOT needed
489c9b5090e2 Initial load
duke
parents:
diff changeset
   556
// for the next call till after the call.  This prevents me from trying to
489c9b5090e2 Initial load
duke
parents:
diff changeset
   557
// carry lots of stuff live across a call.
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   558
void PhaseCFG::needed_for_next_call(Block* block, Node* this_call, VectorSet& next_call) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   559
  // Find the next control-defining Node in this block
489c9b5090e2 Initial load
duke
parents:
diff changeset
   560
  Node* call = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   561
  for (DUIterator_Fast imax, i = this_call->fast_outs(imax); i < imax; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   562
    Node* m = this_call->fast_out(i);
19724
1e308c6b0de3 8024095: Missing brackets in local scheduling code.
adlertz
parents: 19721
diff changeset
   563
    if (get_block_for_node(m) == block && // Local-block user
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   564
        m != this_call &&       // Not self-start node
19724
1e308c6b0de3 8024095: Missing brackets in local scheduling code.
adlertz
parents: 19721
diff changeset
   565
        m->is_MachCall()) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   566
      call = m;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   567
      break;
19724
1e308c6b0de3 8024095: Missing brackets in local scheduling code.
adlertz
parents: 19721
diff changeset
   568
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   569
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   570
  if (call == NULL)  return;    // No next call (e.g., block end is near)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   571
  // Set next-call for all inputs to this call
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   572
  set_next_call(block, call, next_call);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   573
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   574
11196
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   575
//------------------------------add_call_kills-------------------------------------
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   576
// helper function that adds caller save registers to MachProjNode
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   577
static void add_call_kills(MachProjNode *proj, RegMask& regs, const char* save_policy, bool exclude_soe) {
11196
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   578
  // Fill in the kill mask for the call
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   579
  for( OptoReg::Name r = OptoReg::Name(0); r < _last_Mach_Reg; r=OptoReg::add(r,1) ) {
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   580
    if( !regs.Member(r) ) {     // Not already defined by the call
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   581
      // Save-on-call register?
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   582
      if ((save_policy[r] == 'C') ||
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   583
          (save_policy[r] == 'A') ||
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   584
          ((save_policy[r] == 'E') && exclude_soe)) {
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   585
        proj->_rout.Insert(r);
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   586
      }
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   587
    }
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   588
  }
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   589
}
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   590
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   591
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   592
//------------------------------sched_call-------------------------------------
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   593
uint PhaseCFG::sched_call(Block* block, uint node_cnt, Node_List& worklist, GrowableArray<int>& ready_cnt, MachCallNode* mcall, VectorSet& next_call) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   594
  RegMask regs;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   595
489c9b5090e2 Initial load
duke
parents:
diff changeset
   596
  // Schedule all the users of the call right now.  All the users are
489c9b5090e2 Initial load
duke
parents:
diff changeset
   597
  // projection Nodes, so they must be scheduled next to the call.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   598
  // Collect all the defined registers.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   599
  for (DUIterator_Fast imax, i = mcall->fast_outs(imax); i < imax; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   600
    Node* n = mcall->fast_out(i);
10255
bab46e6f7661 7069452: Cleanup NodeFlags
kvn
parents: 10019
diff changeset
   601
    assert( n->is_MachProj(), "" );
11567
512b2c76e3b7 7116050: C2/ARM: memory stomping error with DivideMcTests
roland
parents: 11196
diff changeset
   602
    int n_cnt = ready_cnt.at(n->_idx)-1;
512b2c76e3b7 7116050: C2/ARM: memory stomping error with DivideMcTests
roland
parents: 11196
diff changeset
   603
    ready_cnt.at_put(n->_idx, n_cnt);
512b2c76e3b7 7116050: C2/ARM: memory stomping error with DivideMcTests
roland
parents: 11196
diff changeset
   604
    assert( n_cnt == 0, "" );
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   605
    // Schedule next to call
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   606
    block->map_node(n, node_cnt++);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   607
    // Collect defined registers
489c9b5090e2 Initial load
duke
parents:
diff changeset
   608
    regs.OR(n->out_RegMask());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   609
    // Check for scheduling the next control-definer
489c9b5090e2 Initial load
duke
parents:
diff changeset
   610
    if( n->bottom_type() == Type::CONTROL )
489c9b5090e2 Initial load
duke
parents:
diff changeset
   611
      // Warm up next pile of heuristic bits
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   612
      needed_for_next_call(block, n, next_call);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   613
489c9b5090e2 Initial load
duke
parents:
diff changeset
   614
    // Children of projections are now all ready
489c9b5090e2 Initial load
duke
parents:
diff changeset
   615
    for (DUIterator_Fast jmax, j = n->fast_outs(jmax); j < jmax; j++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   616
      Node* m = n->fast_out(j); // Get user
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   617
      if(get_block_for_node(m) != block) {
19279
4be3c2e6663c 8022284: Hide internal data structure in PhaseCFG
adlertz
parents: 17384
diff changeset
   618
        continue;
4be3c2e6663c 8022284: Hide internal data structure in PhaseCFG
adlertz
parents: 17384
diff changeset
   619
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   620
      if( m->is_Phi() ) continue;
11567
512b2c76e3b7 7116050: C2/ARM: memory stomping error with DivideMcTests
roland
parents: 11196
diff changeset
   621
      int m_cnt = ready_cnt.at(m->_idx)-1;
512b2c76e3b7 7116050: C2/ARM: memory stomping error with DivideMcTests
roland
parents: 11196
diff changeset
   622
      ready_cnt.at_put(m->_idx, m_cnt);
512b2c76e3b7 7116050: C2/ARM: memory stomping error with DivideMcTests
roland
parents: 11196
diff changeset
   623
      if( m_cnt == 0 )
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   624
        worklist.push(m);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   625
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   626
489c9b5090e2 Initial load
duke
parents:
diff changeset
   627
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   628
489c9b5090e2 Initial load
duke
parents:
diff changeset
   629
  // Act as if the call defines the Frame Pointer.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   630
  // Certainly the FP is alive and well after the call.
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   631
  regs.Insert(_matcher.c_frame_pointer());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   632
489c9b5090e2 Initial load
duke
parents:
diff changeset
   633
  // Set all registers killed and not already defined by the call.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   634
  uint r_cnt = mcall->tf()->range()->cnt();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   635
  int op = mcall->ideal_Opcode();
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   636
  MachProjNode *proj = new (C) MachProjNode( mcall, r_cnt+1, RegMask::Empty, MachProjNode::fat_proj );
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   637
  map_node_to_block(proj, block);
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   638
  block->insert_node(proj, node_cnt++);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   639
489c9b5090e2 Initial load
duke
parents:
diff changeset
   640
  // Select the right register save policy.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   641
  const char * save_policy;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   642
  switch (op) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   643
    case Op_CallRuntime:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   644
    case Op_CallLeaf:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   645
    case Op_CallLeafNoFP:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   646
      // Calling C code so use C calling convention
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   647
      save_policy = _matcher._c_reg_save_policy;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   648
      break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   649
489c9b5090e2 Initial load
duke
parents:
diff changeset
   650
    case Op_CallStaticJava:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   651
    case Op_CallDynamicJava:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   652
      // Calling Java code so use Java calling convention
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   653
      save_policy = _matcher._register_save_policy;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   654
      break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   655
489c9b5090e2 Initial load
duke
parents:
diff changeset
   656
    default:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   657
      ShouldNotReachHere();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   658
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   659
489c9b5090e2 Initial load
duke
parents:
diff changeset
   660
  // When using CallRuntime mark SOE registers as killed by the call
489c9b5090e2 Initial load
duke
parents:
diff changeset
   661
  // so values that could show up in the RegisterMap aren't live in a
489c9b5090e2 Initial load
duke
parents:
diff changeset
   662
  // callee saved register since the register wouldn't know where to
489c9b5090e2 Initial load
duke
parents:
diff changeset
   663
  // find them.  CallLeaf and CallLeafNoFP are ok because they can't
489c9b5090e2 Initial load
duke
parents:
diff changeset
   664
  // have debug info on them.  Strictly speaking this only needs to be
489c9b5090e2 Initial load
duke
parents:
diff changeset
   665
  // done for oops since idealreg2debugmask takes care of debug info
489c9b5090e2 Initial load
duke
parents:
diff changeset
   666
  // references but there no way to handle oops differently than other
489c9b5090e2 Initial load
duke
parents:
diff changeset
   667
  // pointers as far as the kill mask goes.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   668
  bool exclude_soe = op == Op_CallRuntime;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   669
4566
b363f6ef4068 6829187: compiler optimizations required for JSR 292
twisti
parents: 4470
diff changeset
   670
  // If the call is a MethodHandle invoke, we need to exclude the
b363f6ef4068 6829187: compiler optimizations required for JSR 292
twisti
parents: 4470
diff changeset
   671
  // register which is used to save the SP value over MH invokes from
b363f6ef4068 6829187: compiler optimizations required for JSR 292
twisti
parents: 4470
diff changeset
   672
  // the mask.  Otherwise this register could be used for
b363f6ef4068 6829187: compiler optimizations required for JSR 292
twisti
parents: 4470
diff changeset
   673
  // deoptimization information.
b363f6ef4068 6829187: compiler optimizations required for JSR 292
twisti
parents: 4470
diff changeset
   674
  if (op == Op_CallStaticJava) {
b363f6ef4068 6829187: compiler optimizations required for JSR 292
twisti
parents: 4470
diff changeset
   675
    MachCallStaticJavaNode* mcallstaticjava = (MachCallStaticJavaNode*) mcall;
b363f6ef4068 6829187: compiler optimizations required for JSR 292
twisti
parents: 4470
diff changeset
   676
    if (mcallstaticjava->_method_handle_invoke)
b363f6ef4068 6829187: compiler optimizations required for JSR 292
twisti
parents: 4470
diff changeset
   677
      proj->_rout.OR(Matcher::method_handle_invoke_SP_save_mask());
b363f6ef4068 6829187: compiler optimizations required for JSR 292
twisti
parents: 4470
diff changeset
   678
  }
b363f6ef4068 6829187: compiler optimizations required for JSR 292
twisti
parents: 4470
diff changeset
   679
11196
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   680
  add_call_kills(proj, regs, save_policy, exclude_soe);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   681
489c9b5090e2 Initial load
duke
parents:
diff changeset
   682
  return node_cnt;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   683
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   684
489c9b5090e2 Initial load
duke
parents:
diff changeset
   685
489c9b5090e2 Initial load
duke
parents:
diff changeset
   686
//------------------------------schedule_local---------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   687
// Topological sort within a block.  Someday become a real scheduler.
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   688
bool PhaseCFG::schedule_local(Block* block, GrowableArray<int>& ready_cnt, VectorSet& next_call) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   689
  // Already "sorted" are the block start Node (as the first entry), and
489c9b5090e2 Initial load
duke
parents:
diff changeset
   690
  // the block-ending Node and any trailing control projections.  We leave
489c9b5090e2 Initial load
duke
parents:
diff changeset
   691
  // these alone.  PhiNodes and ParmNodes are made to follow the block start
489c9b5090e2 Initial load
duke
parents:
diff changeset
   692
  // Node.  Everything else gets topo-sorted.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   693
489c9b5090e2 Initial load
duke
parents:
diff changeset
   694
#ifndef PRODUCT
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   695
    if (trace_opto_pipelining()) {
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   696
      tty->print_cr("# --- schedule_local B%d, before: ---", block->_pre_order);
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   697
      for (uint i = 0;i < block->number_of_nodes(); i++) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   698
        tty->print("# ");
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   699
        block->get_node(i)->fast_dump();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   700
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   701
      tty->print_cr("#");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   702
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   703
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   704
489c9b5090e2 Initial load
duke
parents:
diff changeset
   705
  // RootNode is already sorted
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   706
  if (block->number_of_nodes() == 1) {
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   707
    return true;
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   708
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   709
489c9b5090e2 Initial load
duke
parents:
diff changeset
   710
  // Move PhiNodes and ParmNodes from 1 to cnt up to the start
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   711
  uint node_cnt = block->end_idx();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   712
  uint phi_cnt = 1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   713
  uint i;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   714
  for( i = 1; i<node_cnt; i++ ) { // Scan for Phi
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   715
    Node *n = block->get_node(i);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   716
    if( n->is_Phi() ||          // Found a PhiNode or ParmNode
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   717
        (n->is_Proj()  && n->in(0) == block->head()) ) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   718
      // Move guy at 'phi_cnt' to the end; makes a hole at phi_cnt
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   719
      block->map_node(block->get_node(phi_cnt), i);
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   720
      block->map_node(n, phi_cnt++);  // swap Phi/Parm up front
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   721
    } else {                    // All others
489c9b5090e2 Initial load
duke
parents:
diff changeset
   722
      // Count block-local inputs to 'n'
489c9b5090e2 Initial load
duke
parents:
diff changeset
   723
      uint cnt = n->len();      // Input count
489c9b5090e2 Initial load
duke
parents:
diff changeset
   724
      uint local = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   725
      for( uint j=0; j<cnt; j++ ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   726
        Node *m = n->in(j);
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   727
        if( m && get_block_for_node(m) == block && !m->is_top() )
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   728
          local++;              // One more block-local input
489c9b5090e2 Initial load
duke
parents:
diff changeset
   729
      }
11567
512b2c76e3b7 7116050: C2/ARM: memory stomping error with DivideMcTests
roland
parents: 11196
diff changeset
   730
      ready_cnt.at_put(n->_idx, local); // Count em up
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   731
9175
80221fe09772 7032963: StoreCM shouldn't participate in store elimination
never
parents: 7397
diff changeset
   732
#ifdef ASSERT
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents: 372
diff changeset
   733
      if( UseConcMarkSweepGC || UseG1GC ) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   734
        if( n->is_Mach() && n->as_Mach()->ideal_Opcode() == Op_StoreCM ) {
9175
80221fe09772 7032963: StoreCM shouldn't participate in store elimination
never
parents: 7397
diff changeset
   735
          // Check the precedence edges
80221fe09772 7032963: StoreCM shouldn't participate in store elimination
never
parents: 7397
diff changeset
   736
          for (uint prec = n->req(); prec < n->len(); prec++) {
80221fe09772 7032963: StoreCM shouldn't participate in store elimination
never
parents: 7397
diff changeset
   737
            Node* oop_store = n->in(prec);
80221fe09772 7032963: StoreCM shouldn't participate in store elimination
never
parents: 7397
diff changeset
   738
            if (oop_store != NULL) {
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   739
              assert(get_block_for_node(oop_store)->_dom_depth <= block->_dom_depth, "oop_store must dominate card-mark");
9175
80221fe09772 7032963: StoreCM shouldn't participate in store elimination
never
parents: 7397
diff changeset
   740
            }
80221fe09772 7032963: StoreCM shouldn't participate in store elimination
never
parents: 7397
diff changeset
   741
          }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   742
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   743
      }
9175
80221fe09772 7032963: StoreCM shouldn't participate in store elimination
never
parents: 7397
diff changeset
   744
#endif
80221fe09772 7032963: StoreCM shouldn't participate in store elimination
never
parents: 7397
diff changeset
   745
80221fe09772 7032963: StoreCM shouldn't participate in store elimination
never
parents: 7397
diff changeset
   746
      // A few node types require changing a required edge to a precedence edge
80221fe09772 7032963: StoreCM shouldn't participate in store elimination
never
parents: 7397
diff changeset
   747
      // before allocation.
4470
1e6edcab3109 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 2348
diff changeset
   748
      if( n->is_Mach() && n->req() > TypeFunc::Parms &&
1e6edcab3109 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 2348
diff changeset
   749
          (n->as_Mach()->ideal_Opcode() == Op_MemBarAcquire ||
1e6edcab3109 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 2348
diff changeset
   750
           n->as_Mach()->ideal_Opcode() == Op_MemBarVolatile) ) {
961
7fb3b13d4205 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 670
diff changeset
   751
        // MemBarAcquire could be created without Precedent edge.
7fb3b13d4205 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 670
diff changeset
   752
        // del_req() replaces the specified edge with the last input edge
7fb3b13d4205 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 670
diff changeset
   753
        // and then removes the last edge. If the specified edge > number of
7fb3b13d4205 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 670
diff changeset
   754
        // edges the last edge will be moved outside of the input edges array
7fb3b13d4205 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 670
diff changeset
   755
        // and the edge will be lost. This is why this code should be
7fb3b13d4205 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 670
diff changeset
   756
        // executed only when Precedent (== TypeFunc::Parms) edge is present.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   757
        Node *x = n->in(TypeFunc::Parms);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   758
        n->del_req(TypeFunc::Parms);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   759
        n->add_prec(x);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   760
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   761
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   762
  }
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   763
  for(uint i2=i; i2< block->number_of_nodes(); i2++ ) // Trailing guys get zapped count
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   764
    ready_cnt.at_put(block->get_node(i2)->_idx, 0);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   765
489c9b5090e2 Initial load
duke
parents:
diff changeset
   766
  // All the prescheduled guys do not hold back internal nodes
489c9b5090e2 Initial load
duke
parents:
diff changeset
   767
  uint i3;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   768
  for(i3 = 0; i3<phi_cnt; i3++ ) {  // For all pre-scheduled
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   769
    Node *n = block->get_node(i3);       // Get pre-scheduled
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   770
    for (DUIterator_Fast jmax, j = n->fast_outs(jmax); j < jmax; j++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   771
      Node* m = n->fast_out(j);
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   772
      if (get_block_for_node(m) == block) { // Local-block user
11567
512b2c76e3b7 7116050: C2/ARM: memory stomping error with DivideMcTests
roland
parents: 11196
diff changeset
   773
        int m_cnt = ready_cnt.at(m->_idx)-1;
512b2c76e3b7 7116050: C2/ARM: memory stomping error with DivideMcTests
roland
parents: 11196
diff changeset
   774
        ready_cnt.at_put(m->_idx, m_cnt);   // Fix ready count
512b2c76e3b7 7116050: C2/ARM: memory stomping error with DivideMcTests
roland
parents: 11196
diff changeset
   775
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   776
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   777
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   778
489c9b5090e2 Initial load
duke
parents:
diff changeset
   779
  Node_List delay;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   780
  // Make a worklist
489c9b5090e2 Initial load
duke
parents:
diff changeset
   781
  Node_List worklist;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   782
  for(uint i4=i3; i4<node_cnt; i4++ ) {    // Put ready guys on worklist
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   783
    Node *m = block->get_node(i4);
11567
512b2c76e3b7 7116050: C2/ARM: memory stomping error with DivideMcTests
roland
parents: 11196
diff changeset
   784
    if( !ready_cnt.at(m->_idx) ) {   // Zero ready count?
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   785
      if (m->is_iteratively_computed()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   786
        // Push induction variable increments last to allow other uses
489c9b5090e2 Initial load
duke
parents:
diff changeset
   787
        // of the phi to be scheduled first. The select() method breaks
489c9b5090e2 Initial load
duke
parents:
diff changeset
   788
        // ties in scheduling by worklist order.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   789
        delay.push(m);
372
b0d8a9fd3646 6601321: Assert(j == 1 || b->_nodes[j-1]->is_Phi(),"CreateEx must be first instruction in block")
never
parents: 360
diff changeset
   790
      } else if (m->is_Mach() && m->as_Mach()->ideal_Opcode() == Op_CreateEx) {
b0d8a9fd3646 6601321: Assert(j == 1 || b->_nodes[j-1]->is_Phi(),"CreateEx must be first instruction in block")
never
parents: 360
diff changeset
   791
        // Force the CreateEx to the top of the list so it's processed
b0d8a9fd3646 6601321: Assert(j == 1 || b->_nodes[j-1]->is_Phi(),"CreateEx must be first instruction in block")
never
parents: 360
diff changeset
   792
        // first and ends up at the start of the block.
b0d8a9fd3646 6601321: Assert(j == 1 || b->_nodes[j-1]->is_Phi(),"CreateEx must be first instruction in block")
never
parents: 360
diff changeset
   793
        worklist.insert(0, m);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   794
      } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   795
        worklist.push(m);         // Then on to worklist!
489c9b5090e2 Initial load
duke
parents:
diff changeset
   796
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   797
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   798
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   799
  while (delay.size()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   800
    Node* d = delay.pop();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   801
    worklist.push(d);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   802
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   803
489c9b5090e2 Initial load
duke
parents:
diff changeset
   804
  // Warm up the 'next_call' heuristic bits
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   805
  needed_for_next_call(block, block->head(), next_call);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   806
489c9b5090e2 Initial load
duke
parents:
diff changeset
   807
#ifndef PRODUCT
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   808
    if (trace_opto_pipelining()) {
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   809
      for (uint j=0; j< block->number_of_nodes(); j++) {
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   810
        Node     *n = block->get_node(j);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   811
        int     idx = n->_idx;
11567
512b2c76e3b7 7116050: C2/ARM: memory stomping error with DivideMcTests
roland
parents: 11196
diff changeset
   812
        tty->print("#   ready cnt:%3d  ", ready_cnt.at(idx));
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   813
        tty->print("latency:%3d  ", get_latency_for_node(n));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   814
        tty->print("%4d: %s\n", idx, n->Name());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   815
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   816
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   817
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   818
11567
512b2c76e3b7 7116050: C2/ARM: memory stomping error with DivideMcTests
roland
parents: 11196
diff changeset
   819
  uint max_idx = (uint)ready_cnt.length();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   820
  // Pull from worklist and schedule
489c9b5090e2 Initial load
duke
parents:
diff changeset
   821
  while( worklist.size() ) {    // Worklist is not ready
489c9b5090e2 Initial load
duke
parents:
diff changeset
   822
489c9b5090e2 Initial load
duke
parents:
diff changeset
   823
#ifndef PRODUCT
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   824
    if (trace_opto_pipelining()) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   825
      tty->print("#   ready list:");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   826
      for( uint i=0; i<worklist.size(); i++ ) { // Inspect entire worklist
489c9b5090e2 Initial load
duke
parents:
diff changeset
   827
        Node *n = worklist[i];      // Get Node on worklist
489c9b5090e2 Initial load
duke
parents:
diff changeset
   828
        tty->print(" %d", n->_idx);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   829
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   830
      tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   831
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   832
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   833
489c9b5090e2 Initial load
duke
parents:
diff changeset
   834
    // Select and pop a ready guy from worklist
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   835
    Node* n = select(block, worklist, ready_cnt, next_call, phi_cnt);
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   836
    block->map_node(n, phi_cnt++);    // Schedule him next
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   837
489c9b5090e2 Initial load
duke
parents:
diff changeset
   838
#ifndef PRODUCT
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   839
    if (trace_opto_pipelining()) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   840
      tty->print("#    select %d: %s", n->_idx, n->Name());
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   841
      tty->print(", latency:%d", get_latency_for_node(n));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   842
      n->dump();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   843
      if (Verbose) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   844
        tty->print("#   ready list:");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   845
        for( uint i=0; i<worklist.size(); i++ ) { // Inspect entire worklist
489c9b5090e2 Initial load
duke
parents:
diff changeset
   846
          Node *n = worklist[i];      // Get Node on worklist
489c9b5090e2 Initial load
duke
parents:
diff changeset
   847
          tty->print(" %d", n->_idx);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   848
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   849
        tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   850
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   851
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   852
489c9b5090e2 Initial load
duke
parents:
diff changeset
   853
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   854
    if( n->is_MachCall() ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   855
      MachCallNode *mcall = n->as_MachCall();
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   856
      phi_cnt = sched_call(block, phi_cnt, worklist, ready_cnt, mcall, next_call);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   857
      continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   858
    }
11196
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   859
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   860
    if (n->is_Mach() && n->as_Mach()->has_call()) {
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   861
      RegMask regs;
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   862
      regs.Insert(_matcher.c_frame_pointer());
11196
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   863
      regs.OR(n->out_RegMask());
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   864
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   865
      MachProjNode *proj = new (C) MachProjNode( n, 1, RegMask::Empty, MachProjNode::fat_proj );
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   866
      map_node_to_block(proj, block);
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   867
      block->insert_node(proj, phi_cnt++);
11196
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   868
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   869
      add_call_kills(proj, regs, _matcher._c_reg_save_policy, false);
11196
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   870
    }
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   871
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   872
    // Children are now all ready
489c9b5090e2 Initial load
duke
parents:
diff changeset
   873
    for (DUIterator_Fast i5max, i5 = n->fast_outs(i5max); i5 < i5max; i5++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   874
      Node* m = n->fast_out(i5); // Get user
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   875
      if (get_block_for_node(m) != block) {
19279
4be3c2e6663c 8022284: Hide internal data structure in PhaseCFG
adlertz
parents: 17384
diff changeset
   876
        continue;
4be3c2e6663c 8022284: Hide internal data structure in PhaseCFG
adlertz
parents: 17384
diff changeset
   877
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   878
      if( m->is_Phi() ) continue;
11567
512b2c76e3b7 7116050: C2/ARM: memory stomping error with DivideMcTests
roland
parents: 11196
diff changeset
   879
      if (m->_idx >= max_idx) { // new node, skip it
11196
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   880
        assert(m->is_MachProj() && n->is_Mach() && n->as_Mach()->has_call(), "unexpected node types");
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   881
        continue;
a310a659c580 7077312: Provide a CALL effect for instruct declaration in the ad file
roland
parents: 10255
diff changeset
   882
      }
11567
512b2c76e3b7 7116050: C2/ARM: memory stomping error with DivideMcTests
roland
parents: 11196
diff changeset
   883
      int m_cnt = ready_cnt.at(m->_idx)-1;
512b2c76e3b7 7116050: C2/ARM: memory stomping error with DivideMcTests
roland
parents: 11196
diff changeset
   884
      ready_cnt.at_put(m->_idx, m_cnt);
512b2c76e3b7 7116050: C2/ARM: memory stomping error with DivideMcTests
roland
parents: 11196
diff changeset
   885
      if( m_cnt == 0 )
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   886
        worklist.push(m);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   887
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   888
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   889
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   890
  if( phi_cnt != block->end_idx() ) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   891
    // did not schedule all.  Retry, Bailout, or Die
489c9b5090e2 Initial load
duke
parents:
diff changeset
   892
    if (C->subsume_loads() == true && !C->failing()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   893
      // Retry with subsume_loads == false
489c9b5090e2 Initial load
duke
parents:
diff changeset
   894
      // If this is the first failure, the sentinel string will "stick"
489c9b5090e2 Initial load
duke
parents:
diff changeset
   895
      // to the Compile object, and the C2Compiler will see it and retry.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   896
      C->record_failure(C2Compiler::retry_no_subsuming_loads());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   897
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   898
    // assert( phi_cnt == end_idx(), "did not schedule all" );
489c9b5090e2 Initial load
duke
parents:
diff changeset
   899
    return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   900
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   901
489c9b5090e2 Initial load
duke
parents:
diff changeset
   902
#ifndef PRODUCT
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   903
  if (trace_opto_pipelining()) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   904
    tty->print_cr("#");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   905
    tty->print_cr("# after schedule_local");
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   906
    for (uint i = 0;i < block->number_of_nodes();i++) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   907
      tty->print("# ");
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   908
      block->get_node(i)->fast_dump();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   909
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   910
    tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   911
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   912
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   913
489c9b5090e2 Initial load
duke
parents:
diff changeset
   914
489c9b5090e2 Initial load
duke
parents:
diff changeset
   915
  return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   916
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   917
489c9b5090e2 Initial load
duke
parents:
diff changeset
   918
//--------------------------catch_cleanup_fix_all_inputs-----------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   919
static void catch_cleanup_fix_all_inputs(Node *use, Node *old_def, Node *new_def) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   920
  for (uint l = 0; l < use->len(); l++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   921
    if (use->in(l) == old_def) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   922
      if (l < use->req()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   923
        use->set_req(l, new_def);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   924
      } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   925
        use->rm_prec(l);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   926
        use->add_prec(new_def);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   927
        l--;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   928
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   929
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   930
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   931
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   932
489c9b5090e2 Initial load
duke
parents:
diff changeset
   933
//------------------------------catch_cleanup_find_cloned_def------------------
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   934
Node* PhaseCFG::catch_cleanup_find_cloned_def(Block *use_blk, Node *def, Block *def_blk, int n_clone_idx) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   935
  assert( use_blk != def_blk, "Inter-block cleanup only");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   936
489c9b5090e2 Initial load
duke
parents:
diff changeset
   937
  // The use is some block below the Catch.  Find and return the clone of the def
489c9b5090e2 Initial load
duke
parents:
diff changeset
   938
  // that dominates the use. If there is no clone in a dominating block, then
489c9b5090e2 Initial load
duke
parents:
diff changeset
   939
  // create a phi for the def in a dominating block.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   940
489c9b5090e2 Initial load
duke
parents:
diff changeset
   941
  // Find which successor block dominates this use.  The successor
489c9b5090e2 Initial load
duke
parents:
diff changeset
   942
  // blocks must all be single-entry (from the Catch only; I will have
489c9b5090e2 Initial load
duke
parents:
diff changeset
   943
  // split blocks to make this so), hence they all dominate.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   944
  while( use_blk->_dom_depth > def_blk->_dom_depth+1 )
489c9b5090e2 Initial load
duke
parents:
diff changeset
   945
    use_blk = use_blk->_idom;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   946
489c9b5090e2 Initial load
duke
parents:
diff changeset
   947
  // Find the successor
489c9b5090e2 Initial load
duke
parents:
diff changeset
   948
  Node *fixup = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   949
489c9b5090e2 Initial load
duke
parents:
diff changeset
   950
  uint j;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   951
  for( j = 0; j < def_blk->_num_succs; j++ )
489c9b5090e2 Initial load
duke
parents:
diff changeset
   952
    if( use_blk == def_blk->_succs[j] )
489c9b5090e2 Initial load
duke
parents:
diff changeset
   953
      break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   954
489c9b5090e2 Initial load
duke
parents:
diff changeset
   955
  if( j == def_blk->_num_succs ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   956
    // Block at same level in dom-tree is not a successor.  It needs a
489c9b5090e2 Initial load
duke
parents:
diff changeset
   957
    // PhiNode, the PhiNode uses from the def and IT's uses need fixup.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   958
    Node_Array inputs = new Node_List(Thread::current()->resource_area());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   959
    for(uint k = 1; k < use_blk->num_preds(); k++) {
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   960
      Block* block = get_block_for_node(use_blk->pred(k));
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   961
      inputs.map(k, catch_cleanup_find_cloned_def(block, def, def_blk, n_clone_idx));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   962
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   963
489c9b5090e2 Initial load
duke
parents:
diff changeset
   964
    // Check to see if the use_blk already has an identical phi inserted.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   965
    // If it exists, it will be at the first position since all uses of a
489c9b5090e2 Initial load
duke
parents:
diff changeset
   966
    // def are processed together.
19717
7819ffdaf0ff 8023691: Create interface for nodes in class Block
adlertz
parents: 19330
diff changeset
   967
    Node *phi = use_blk->get_node(1);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   968
    if( phi->is_Phi() ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   969
      fixup = phi;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   970
      for (uint k = 1; k < use_blk->num_preds(); k++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   971
        if (phi->in(k) != inputs[k]) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   972
          // Not a match
489c9b5090e2 Initial load
duke
parents:
diff changeset
   973
          fixup = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   974
          break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   975
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   976
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   977
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   978
489c9b5090e2 Initial load
duke
parents:
diff changeset
   979
    // If an existing PhiNode was not found, make a new one.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   980
    if (fixup == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   981
      Node *new_phi = PhiNode::make(use_blk->head(), def);
19717
7819ffdaf0ff 8023691: Create interface for nodes in class Block
adlertz
parents: 19330
diff changeset
   982
      use_blk->insert_node(new_phi, 1);
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
   983
      map_node_to_block(new_phi, use_blk);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   984
      for (uint k = 1; k < use_blk->num_preds(); k++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   985
        new_phi->set_req(k, inputs[k]);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   986
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   987
      fixup = new_phi;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   988
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   989
489c9b5090e2 Initial load
duke
parents:
diff changeset
   990
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   991
    // Found the use just below the Catch.  Make it use the clone.
19717
7819ffdaf0ff 8023691: Create interface for nodes in class Block
adlertz
parents: 19330
diff changeset
   992
    fixup = use_blk->get_node(n_clone_idx);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   993
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   994
489c9b5090e2 Initial load
duke
parents:
diff changeset
   995
  return fixup;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   996
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   997
489c9b5090e2 Initial load
duke
parents:
diff changeset
   998
//--------------------------catch_cleanup_intra_block--------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   999
// Fix all input edges in use that reference "def".  The use is in the same
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1000
// block as the def and both have been cloned in each successor block.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1001
static void catch_cleanup_intra_block(Node *use, Node *def, Block *blk, int beg, int n_clone_idx) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1002
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1003
  // Both the use and def have been cloned. For each successor block,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1004
  // get the clone of the use, and make its input the clone of the def
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1005
  // found in that block.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1006
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1007
  uint use_idx = blk->find_node(use);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1008
  uint offset_idx = use_idx - beg;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1009
  for( uint k = 0; k < blk->_num_succs; k++ ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1010
    // Get clone in each successor block
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1011
    Block *sb = blk->_succs[k];
19717
7819ffdaf0ff 8023691: Create interface for nodes in class Block
adlertz
parents: 19330
diff changeset
  1012
    Node *clone = sb->get_node(offset_idx+1);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1013
    assert( clone->Opcode() == use->Opcode(), "" );
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1014
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1015
    // Make use-clone reference the def-clone
19717
7819ffdaf0ff 8023691: Create interface for nodes in class Block
adlertz
parents: 19330
diff changeset
  1016
    catch_cleanup_fix_all_inputs(clone, def, sb->get_node(n_clone_idx));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1017
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1018
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1019
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1020
//------------------------------catch_cleanup_inter_block---------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1021
// Fix all input edges in use that reference "def".  The use is in a different
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1022
// block than the def.
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1023
void PhaseCFG::catch_cleanup_inter_block(Node *use, Block *use_blk, Node *def, Block *def_blk, int n_clone_idx) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1024
  if( !use_blk ) return;        // Can happen if the use is a precedence edge
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1025
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1026
  Node *new_def = catch_cleanup_find_cloned_def(use_blk, def, def_blk, n_clone_idx);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1027
  catch_cleanup_fix_all_inputs(use, def, new_def);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1028
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1029
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1030
//------------------------------call_catch_cleanup-----------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1031
// If we inserted any instructions between a Call and his CatchNode,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1032
// clone the instructions on all paths below the Catch.
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1033
void PhaseCFG::call_catch_cleanup(Block* block) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1034
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1035
  // End of region to clone
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1036
  uint end = block->end_idx();
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1037
  if( !block->get_node(end)->is_Catch() ) return;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1038
  // Start of region to clone
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1039
  uint beg = end;
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1040
  while(!block->get_node(beg-1)->is_MachProj() ||
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1041
        !block->get_node(beg-1)->in(0)->is_MachCall() ) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1042
    beg--;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1043
    assert(beg > 0,"Catch cleanup walking beyond block boundary");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1044
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1045
  // Range of inserted instructions is [beg, end)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1046
  if( beg == end ) return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1047
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1048
  // Clone along all Catch output paths.  Clone area between the 'beg' and
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1049
  // 'end' indices.
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1050
  for( uint i = 0; i < block->_num_succs; i++ ) {
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1051
    Block *sb = block->_succs[i];
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1052
    // Clone the entire area; ignoring the edge fixup for now.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1053
    for( uint j = end; j > beg; j-- ) {
6188
95ea4d66089a 6973329: C2 with Zero based COOP produces code with broken anti-dependency on x86
kvn
parents: 6180
diff changeset
  1054
      // It is safe here to clone a node with anti_dependence
95ea4d66089a 6973329: C2 with Zero based COOP produces code with broken anti-dependency on x86
kvn
parents: 6180
diff changeset
  1055
      // since clones dominate on each path.
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1056
      Node *clone = block->get_node(j-1)->clone();
19717
7819ffdaf0ff 8023691: Create interface for nodes in class Block
adlertz
parents: 19330
diff changeset
  1057
      sb->insert_node(clone, 1);
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1058
      map_node_to_block(clone, sb);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1059
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1060
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1061
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1062
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1063
  // Fixup edges.  Check the def-use info per cloned Node
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1064
  for(uint i2 = beg; i2 < end; i2++ ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1065
    uint n_clone_idx = i2-beg+1; // Index of clone of n in each successor block
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1066
    Node *n = block->get_node(i2);        // Node that got cloned
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1067
    // Need DU safe iterator because of edge manipulation in calls.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1068
    Unique_Node_List *out = new Unique_Node_List(Thread::current()->resource_area());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1069
    for (DUIterator_Fast j1max, j1 = n->fast_outs(j1max); j1 < j1max; j1++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1070
      out->push(n->fast_out(j1));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1071
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1072
    uint max = out->size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1073
    for (uint j = 0; j < max; j++) {// For all users
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1074
      Node *use = out->pop();
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1075
      Block *buse = get_block_for_node(use);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1076
      if( use->is_Phi() ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1077
        for( uint k = 1; k < use->req(); k++ )
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1078
          if( use->in(k) == n ) {
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1079
            Block* b = get_block_for_node(buse->pred(k));
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1080
            Node *fixup = catch_cleanup_find_cloned_def(b, n, block, n_clone_idx);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1081
            use->set_req(k, fixup);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1082
          }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1083
      } else {
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1084
        if (block == buse) {
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1085
          catch_cleanup_intra_block(use, n, block, beg, n_clone_idx);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1086
        } else {
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1087
          catch_cleanup_inter_block(use, buse, n, block, n_clone_idx);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1088
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1089
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1090
    } // End for all users
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1091
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1092
  } // End of for all Nodes in cloned area
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1093
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1094
  // Remove the now-dead cloned ops
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1095
  for(uint i3 = beg; i3 < end; i3++ ) {
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1096
    block->get_node(beg)->disconnect_inputs(NULL, C);
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1097
    block->remove_node(beg);
1
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 the successor blocks have a CreateEx node, move it back to the top
19721
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1101
  for(uint i4 = 0; i4 < block->_num_succs; i4++ ) {
8ecbb2cdc965 8023988: Move local scheduling of nodes to the CFG creation and code motion phase (PhaseCFG)
adlertz
parents: 19717
diff changeset
  1102
    Block *sb = block->_succs[i4];
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1103
    uint new_cnt = end - beg;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1104
    // Remove any newly created, but dead, nodes.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1105
    for( uint j = new_cnt; j > 0; j-- ) {
19717
7819ffdaf0ff 8023691: Create interface for nodes in class Block
adlertz
parents: 19330
diff changeset
  1106
      Node *n = sb->get_node(j);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1107
      if (n->outcnt() == 0 &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1108
          (!n->is_Proj() || n->as_Proj()->in(0)->outcnt() == 1) ){
14623
70c4c1be0a14 7092905: C2: Keep track of the number of dead nodes
bharadwaj
parents: 13969
diff changeset
  1109
        n->disconnect_inputs(NULL, C);
19717
7819ffdaf0ff 8023691: Create interface for nodes in class Block
adlertz
parents: 19330
diff changeset
  1110
        sb->remove_node(j);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1111
        new_cnt--;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1112
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1113
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1114
    // If any newly created nodes remain, move the CreateEx node to the top
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1115
    if (new_cnt > 0) {
19717
7819ffdaf0ff 8023691: Create interface for nodes in class Block
adlertz
parents: 19330
diff changeset
  1116
      Node *cex = sb->get_node(1+new_cnt);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1117
      if( cex->is_Mach() && cex->as_Mach()->ideal_Opcode() == Op_CreateEx ) {
19717
7819ffdaf0ff 8023691: Create interface for nodes in class Block
adlertz
parents: 19330
diff changeset
  1118
        sb->remove_node(1+new_cnt);
7819ffdaf0ff 8023691: Create interface for nodes in class Block
adlertz
parents: 19330
diff changeset
  1119
        sb->insert_node(cex, 1);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1120
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1121
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1122
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1123
}