author | tschatzl |
Wed, 08 Aug 2018 15:31:06 +0200 | |
changeset 51333 | f6641fcf7b7e |
parent 49373 | 47b5652f2928 |
child 53244 | 9807daeb47c4 |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright (c) 2000, 2018, 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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||
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#ifndef SHARE_VM_CI_CITYPEFLOW_HPP |
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#define SHARE_VM_CI_CITYPEFLOW_HPP |
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#ifdef COMPILER2 |
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#include "ci/ciEnv.hpp" |
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#include "ci/ciKlass.hpp" |
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#include "ci/ciMethodBlocks.hpp" |
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#endif |
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class ciTypeFlow : public ResourceObj { |
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private: |
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ciEnv* _env; |
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ciMethod* _method; |
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ciMethodBlocks* _methodBlocks; |
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int _osr_bci; |
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||
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// information cached from the method: |
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int _max_locals; |
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int _max_stack; |
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int _code_size; |
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bool _has_irreducible_entry; |
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const char* _failure_reason; |
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public: |
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class StateVector; |
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class Loop; |
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class Block; |
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// Build a type flow analyzer |
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// Do an OSR analysis if osr_bci >= 0. |
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ciTypeFlow(ciEnv* env, ciMethod* method, int osr_bci = InvocationEntryBci); |
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// Accessors |
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ciMethod* method() const { return _method; } |
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ciEnv* env() { return _env; } |
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Arena* arena() { return _env->arena(); } |
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bool is_osr_flow() const{ return _osr_bci != InvocationEntryBci; } |
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int start_bci() const { return is_osr_flow()? _osr_bci: 0; } |
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int max_locals() const { return _max_locals; } |
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int max_stack() const { return _max_stack; } |
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int max_cells() const { return _max_locals + _max_stack; } |
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int code_size() const { return _code_size; } |
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bool has_irreducible_entry() const { return _has_irreducible_entry; } |
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// Represents information about an "active" jsr call. This |
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// class represents a call to the routine at some entry address |
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// with some distinct return address. |
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class JsrRecord : public ResourceObj { |
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private: |
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int _entry_address; |
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int _return_address; |
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public: |
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JsrRecord(int entry_address, int return_address) { |
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_entry_address = entry_address; |
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_return_address = return_address; |
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} |
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int entry_address() const { return _entry_address; } |
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int return_address() const { return _return_address; } |
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void print_on(outputStream* st) const { |
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#ifndef PRODUCT |
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st->print("%d->%d", entry_address(), return_address()); |
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#endif |
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} |
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}; |
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// A JsrSet represents some set of JsrRecords. This class |
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// is used to record a set of all jsr routines which we permit |
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// execution to return (ret) from. |
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// |
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// During abstract interpretation, JsrSets are used to determine |
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// whether two paths which reach a given block are unique, and |
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// should be cloned apart, or are compatible, and should merge |
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// together. |
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// |
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// Note that different amounts of effort can be expended determining |
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// if paths are compatible. <DISCUSSION> |
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class JsrSet : public ResourceObj { |
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private: |
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GrowableArray<JsrRecord*>* _set; |
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JsrRecord* record_at(int i) { |
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return _set->at(i); |
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} |
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// Insert the given JsrRecord into the JsrSet, maintaining the order |
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// of the set and replacing any element with the same entry address. |
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void insert_jsr_record(JsrRecord* record); |
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// Remove the JsrRecord with the given return address from the JsrSet. |
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void remove_jsr_record(int return_address); |
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public: |
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JsrSet(Arena* arena, int default_len = 4); |
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// Copy this JsrSet. |
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void copy_into(JsrSet* jsrs); |
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// Is this JsrSet compatible with some other JsrSet? |
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bool is_compatible_with(JsrSet* other); |
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// Apply the effect of a single bytecode to the JsrSet. |
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void apply_control(ciTypeFlow* analyzer, |
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ciBytecodeStream* str, |
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StateVector* state); |
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// What is the cardinality of this set? |
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int size() const { return _set->length(); } |
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void print_on(outputStream* st) const PRODUCT_RETURN; |
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}; |
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class LocalSet { |
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private: |
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enum Constants { max = 63 }; |
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uint64_t _bits; |
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public: |
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LocalSet() : _bits(0) {} |
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void add(uint32_t i) { if (i < (uint32_t)max) _bits |= (1LL << i); } |
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void add(LocalSet* ls) { _bits |= ls->_bits; } |
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bool test(uint32_t i) const { return i < (uint32_t)max ? (_bits>>i)&1U : true; } |
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void clear() { _bits = 0; } |
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void print_on(outputStream* st, int limit) const PRODUCT_RETURN; |
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}; |
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// Used as a combined index for locals and temps |
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enum Cell { |
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Cell_0, Cell_max = INT_MAX |
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}; |
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// A StateVector summarizes the type information at some |
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// point in the program |
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class StateVector : public ResourceObj { |
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private: |
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ciType** _types; |
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int _stack_size; |
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int _monitor_count; |
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ciTypeFlow* _outer; |
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int _trap_bci; |
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int _trap_index; |
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LocalSet _def_locals; // For entire block |
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static ciType* type_meet_internal(ciType* t1, ciType* t2, ciTypeFlow* analyzer); |
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public: |
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// Special elements in our type lattice. |
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enum { |
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T_TOP = T_VOID, // why not? |
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T_BOTTOM = T_CONFLICT, |
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T_LONG2 = T_SHORT, // 2nd word of T_LONG |
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T_DOUBLE2 = T_CHAR, // 2nd word of T_DOUBLE |
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T_NULL = T_BYTE // for now. |
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}; |
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static ciType* top_type() { return ciType::make((BasicType)T_TOP); } |
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static ciType* bottom_type() { return ciType::make((BasicType)T_BOTTOM); } |
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static ciType* long2_type() { return ciType::make((BasicType)T_LONG2); } |
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static ciType* double2_type(){ return ciType::make((BasicType)T_DOUBLE2); } |
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static ciType* null_type() { return ciType::make((BasicType)T_NULL); } |
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static ciType* half_type(ciType* t) { |
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switch (t->basic_type()) { |
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case T_LONG: return long2_type(); |
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case T_DOUBLE: return double2_type(); |
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default: ShouldNotReachHere(); return NULL; |
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} |
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} |
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// The meet operation for our type lattice. |
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ciType* type_meet(ciType* t1, ciType* t2) { |
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return type_meet_internal(t1, t2, outer()); |
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} |
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// Accessors |
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ciTypeFlow* outer() const { return _outer; } |
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int stack_size() const { return _stack_size; } |
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void set_stack_size(int ss) { _stack_size = ss; } |
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int monitor_count() const { return _monitor_count; } |
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void set_monitor_count(int mc) { _monitor_count = mc; } |
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LocalSet* def_locals() { return &_def_locals; } |
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const LocalSet* def_locals() const { return &_def_locals; } |
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static Cell start_cell() { return (Cell)0; } |
215 |
static Cell next_cell(Cell c) { return (Cell)(((int)c) + 1); } |
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Cell limit_cell() const { |
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return (Cell)(outer()->max_locals() + stack_size()); |
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} |
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// Cell creation |
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Cell local(int lnum) const { |
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assert(lnum < outer()->max_locals(), "index check"); |
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return (Cell)(lnum); |
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} |
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Cell stack(int snum) const { |
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assert(snum < stack_size(), "index check"); |
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return (Cell)(outer()->max_locals() + snum); |
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} |
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Cell tos() const { return stack(stack_size()-1); } |
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// For external use only: |
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ciType* local_type_at(int i) const { return type_at(local(i)); } |
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ciType* stack_type_at(int i) const { return type_at(stack(i)); } |
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// Accessors for the type of some Cell c |
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ciType* type_at(Cell c) const { |
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assert(start_cell() <= c && c < limit_cell(), "out of bounds"); |
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return _types[c]; |
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} |
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void set_type_at(Cell c, ciType* type) { |
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assert(start_cell() <= c && c < limit_cell(), "out of bounds"); |
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_types[c] = type; |
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} |
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// Top-of-stack operations. |
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void set_type_at_tos(ciType* type) { set_type_at(tos(), type); } |
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ciType* type_at_tos() const { return type_at(tos()); } |
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||
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void push(ciType* type) { |
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_stack_size++; |
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set_type_at_tos(type); |
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} |
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void pop() { |
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debug_only(set_type_at_tos(bottom_type())); |
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_stack_size--; |
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} |
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ciType* pop_value() { |
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ciType* t = type_at_tos(); |
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pop(); |
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return t; |
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} |
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// Convenience operations. |
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267 |
bool is_reference(ciType* type) const { |
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268 |
return type == null_type() || !type->is_primitive_type(); |
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} |
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bool is_int(ciType* type) const { |
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return type->basic_type() == T_INT; |
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} |
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bool is_long(ciType* type) const { |
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return type->basic_type() == T_LONG; |
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} |
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bool is_float(ciType* type) const { |
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return type->basic_type() == T_FLOAT; |
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} |
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bool is_double(ciType* type) const { |
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return type->basic_type() == T_DOUBLE; |
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} |
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void store_to_local(int lnum) { |
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_def_locals.add((uint) lnum); |
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} |
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1 | 287 |
void push_translate(ciType* type); |
288 |
||
289 |
void push_int() { |
|
290 |
push(ciType::make(T_INT)); |
|
291 |
} |
|
292 |
void pop_int() { |
|
293 |
assert(is_int(type_at_tos()), "must be integer"); |
|
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pop(); |
|
295 |
} |
|
296 |
void check_int(Cell c) { |
|
297 |
assert(is_int(type_at(c)), "must be integer"); |
|
298 |
} |
|
299 |
void push_double() { |
|
300 |
push(ciType::make(T_DOUBLE)); |
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301 |
push(double2_type()); |
|
302 |
} |
|
303 |
void pop_double() { |
|
304 |
assert(type_at_tos() == double2_type(), "must be 2nd half"); |
|
305 |
pop(); |
|
306 |
assert(is_double(type_at_tos()), "must be double"); |
|
307 |
pop(); |
|
308 |
} |
|
309 |
void push_float() { |
|
310 |
push(ciType::make(T_FLOAT)); |
|
311 |
} |
|
312 |
void pop_float() { |
|
313 |
assert(is_float(type_at_tos()), "must be float"); |
|
314 |
pop(); |
|
315 |
} |
|
316 |
void push_long() { |
|
317 |
push(ciType::make(T_LONG)); |
|
318 |
push(long2_type()); |
|
319 |
} |
|
320 |
void pop_long() { |
|
321 |
assert(type_at_tos() == long2_type(), "must be 2nd half"); |
|
322 |
pop(); |
|
323 |
assert(is_long(type_at_tos()), "must be long"); |
|
324 |
pop(); |
|
325 |
} |
|
326 |
void push_object(ciKlass* klass) { |
|
327 |
push(klass); |
|
328 |
} |
|
329 |
void pop_object() { |
|
330 |
assert(is_reference(type_at_tos()), "must be reference type"); |
|
331 |
pop(); |
|
332 |
} |
|
333 |
void pop_array() { |
|
334 |
assert(type_at_tos() == null_type() || |
|
335 |
type_at_tos()->is_array_klass(), "must be array type"); |
|
336 |
pop(); |
|
337 |
} |
|
338 |
// pop_objArray and pop_typeArray narrow the tos to ciObjArrayKlass |
|
339 |
// or ciTypeArrayKlass (resp.). In the rare case that an explicit |
|
340 |
// null is popped from the stack, we return NULL. Caller beware. |
|
341 |
ciObjArrayKlass* pop_objArray() { |
|
342 |
ciType* array = pop_value(); |
|
343 |
if (array == null_type()) return NULL; |
|
344 |
assert(array->is_obj_array_klass(), "must be object array type"); |
|
345 |
return array->as_obj_array_klass(); |
|
346 |
} |
|
347 |
ciTypeArrayKlass* pop_typeArray() { |
|
348 |
ciType* array = pop_value(); |
|
349 |
if (array == null_type()) return NULL; |
|
350 |
assert(array->is_type_array_klass(), "must be prim array type"); |
|
351 |
return array->as_type_array_klass(); |
|
352 |
} |
|
353 |
void push_null() { |
|
354 |
push(null_type()); |
|
355 |
} |
|
356 |
void do_null_assert(ciKlass* unloaded_klass); |
|
357 |
||
358 |
// Helper convenience routines. |
|
359 |
void do_aaload(ciBytecodeStream* str); |
|
360 |
void do_checkcast(ciBytecodeStream* str); |
|
361 |
void do_getfield(ciBytecodeStream* str); |
|
362 |
void do_getstatic(ciBytecodeStream* str); |
|
363 |
void do_invoke(ciBytecodeStream* str, bool has_receiver); |
|
364 |
void do_jsr(ciBytecodeStream* str); |
|
365 |
void do_ldc(ciBytecodeStream* str); |
|
366 |
void do_multianewarray(ciBytecodeStream* str); |
|
367 |
void do_new(ciBytecodeStream* str); |
|
368 |
void do_newarray(ciBytecodeStream* str); |
|
369 |
void do_putfield(ciBytecodeStream* str); |
|
370 |
void do_putstatic(ciBytecodeStream* str); |
|
371 |
void do_ret(ciBytecodeStream* str); |
|
372 |
||
373 |
void overwrite_local_double_long(int index) { |
|
374 |
// Invalidate the previous local if it contains first half of |
|
375 |
// a double or long value since it's seconf half is being overwritten. |
|
376 |
int prev_index = index - 1; |
|
377 |
if (prev_index >= 0 && |
|
378 |
(is_double(type_at(local(prev_index))) || |
|
379 |
is_long(type_at(local(prev_index))))) { |
|
380 |
set_type_at(local(prev_index), bottom_type()); |
|
381 |
} |
|
382 |
} |
|
383 |
||
384 |
void load_local_object(int index) { |
|
385 |
ciType* type = type_at(local(index)); |
|
386 |
assert(is_reference(type), "must be reference type"); |
|
387 |
push(type); |
|
388 |
} |
|
389 |
void store_local_object(int index) { |
|
390 |
ciType* type = pop_value(); |
|
391 |
assert(is_reference(type) || type->is_return_address(), |
|
392 |
"must be reference type or return address"); |
|
393 |
overwrite_local_double_long(index); |
|
394 |
set_type_at(local(index), type); |
|
1399
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|
395 |
store_to_local(index); |
1 | 396 |
} |
397 |
||
398 |
void load_local_double(int index) { |
|
399 |
ciType* type = type_at(local(index)); |
|
400 |
ciType* type2 = type_at(local(index+1)); |
|
401 |
assert(is_double(type), "must be double type"); |
|
402 |
assert(type2 == double2_type(), "must be 2nd half"); |
|
403 |
push(type); |
|
404 |
push(double2_type()); |
|
405 |
} |
|
406 |
void store_local_double(int index) { |
|
407 |
ciType* type2 = pop_value(); |
|
408 |
ciType* type = pop_value(); |
|
409 |
assert(is_double(type), "must be double"); |
|
410 |
assert(type2 == double2_type(), "must be 2nd half"); |
|
411 |
overwrite_local_double_long(index); |
|
412 |
set_type_at(local(index), type); |
|
413 |
set_type_at(local(index+1), type2); |
|
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|
414 |
store_to_local(index); |
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|
415 |
store_to_local(index+1); |
1 | 416 |
} |
417 |
||
418 |
void load_local_float(int index) { |
|
419 |
ciType* type = type_at(local(index)); |
|
420 |
assert(is_float(type), "must be float type"); |
|
421 |
push(type); |
|
422 |
} |
|
423 |
void store_local_float(int index) { |
|
424 |
ciType* type = pop_value(); |
|
425 |
assert(is_float(type), "must be float type"); |
|
426 |
overwrite_local_double_long(index); |
|
427 |
set_type_at(local(index), type); |
|
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|
428 |
store_to_local(index); |
1 | 429 |
} |
430 |
||
431 |
void load_local_int(int index) { |
|
432 |
ciType* type = type_at(local(index)); |
|
433 |
assert(is_int(type), "must be int type"); |
|
434 |
push(type); |
|
435 |
} |
|
436 |
void store_local_int(int index) { |
|
437 |
ciType* type = pop_value(); |
|
438 |
assert(is_int(type), "must be int type"); |
|
439 |
overwrite_local_double_long(index); |
|
440 |
set_type_at(local(index), type); |
|
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|
441 |
store_to_local(index); |
1 | 442 |
} |
443 |
||
444 |
void load_local_long(int index) { |
|
445 |
ciType* type = type_at(local(index)); |
|
446 |
ciType* type2 = type_at(local(index+1)); |
|
447 |
assert(is_long(type), "must be long type"); |
|
448 |
assert(type2 == long2_type(), "must be 2nd half"); |
|
449 |
push(type); |
|
450 |
push(long2_type()); |
|
451 |
} |
|
452 |
void store_local_long(int index) { |
|
453 |
ciType* type2 = pop_value(); |
|
454 |
ciType* type = pop_value(); |
|
455 |
assert(is_long(type), "must be long"); |
|
456 |
assert(type2 == long2_type(), "must be 2nd half"); |
|
457 |
overwrite_local_double_long(index); |
|
458 |
set_type_at(local(index), type); |
|
459 |
set_type_at(local(index+1), type2); |
|
1399
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|
460 |
store_to_local(index); |
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|
461 |
store_to_local(index+1); |
1 | 462 |
} |
463 |
||
464 |
// Stop interpretation of this path with a trap. |
|
465 |
void trap(ciBytecodeStream* str, ciKlass* klass, int index); |
|
466 |
||
467 |
public: |
|
468 |
StateVector(ciTypeFlow* outer); |
|
469 |
||
470 |
// Copy our value into some other StateVector |
|
471 |
void copy_into(StateVector* copy) const; |
|
472 |
||
473 |
// Meets this StateVector with another, destructively modifying this |
|
474 |
// one. Returns true if any modification takes place. |
|
475 |
bool meet(const StateVector* incoming); |
|
476 |
||
477 |
// Ditto, except that the incoming state is coming from an exception. |
|
478 |
bool meet_exception(ciInstanceKlass* exc, const StateVector* incoming); |
|
479 |
||
480 |
// Apply the effect of one bytecode to this StateVector |
|
481 |
bool apply_one_bytecode(ciBytecodeStream* stream); |
|
482 |
||
483 |
// What is the bci of the trap? |
|
484 |
int trap_bci() { return _trap_bci; } |
|
485 |
||
486 |
// What is the index associated with the trap? |
|
487 |
int trap_index() { return _trap_index; } |
|
488 |
||
489 |
void print_cell_on(outputStream* st, Cell c) const PRODUCT_RETURN; |
|
490 |
void print_on(outputStream* st) const PRODUCT_RETURN; |
|
491 |
}; |
|
492 |
||
493 |
// Parameter for "find_block" calls: |
|
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|
494 |
// Describes the difference between a public and backedge copy. |
1 | 495 |
enum CreateOption { |
496 |
create_public_copy, |
|
1399
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|
497 |
create_backedge_copy, |
1 | 498 |
no_create |
499 |
}; |
|
500 |
||
1399
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|
501 |
// Successor iterator |
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|
502 |
class SuccIter : public StackObj { |
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|
503 |
private: |
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|
504 |
Block* _pred; |
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|
505 |
int _index; |
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|
506 |
Block* _succ; |
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|
507 |
public: |
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|
508 |
SuccIter() : _pred(NULL), _index(-1), _succ(NULL) {} |
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|
509 |
SuccIter(Block* pred) : _pred(pred), _index(-1), _succ(NULL) { next(); } |
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|
510 |
int index() { return _index; } |
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|
511 |
Block* pred() { return _pred; } // Return predecessor |
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|
512 |
bool done() { return _index < 0; } // Finished? |
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|
513 |
Block* succ() { return _succ; } // Return current successor |
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|
514 |
void next(); // Advance |
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|
515 |
void set_succ(Block* succ); // Update current successor |
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|
516 |
bool is_normal_ctrl() { return index() < _pred->successors()->length(); } |
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|
517 |
}; |
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|
518 |
|
1 | 519 |
// A basic block |
520 |
class Block : public ResourceObj { |
|
521 |
private: |
|
522 |
ciBlock* _ciblock; |
|
523 |
GrowableArray<Block*>* _exceptions; |
|
524 |
GrowableArray<ciInstanceKlass*>* _exc_klasses; |
|
525 |
GrowableArray<Block*>* _successors; |
|
34151
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|
526 |
GrowableArray<Block*>* _predecessors; |
1 | 527 |
StateVector* _state; |
528 |
JsrSet* _jsrs; |
|
529 |
||
530 |
int _trap_bci; |
|
531 |
int _trap_index; |
|
532 |
||
1399
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changeset
|
533 |
// pre_order, assigned at first visit. Used as block ID and "visited" tag |
1 | 534 |
int _pre_order; |
535 |
||
1399
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changeset
|
536 |
// A post-order, used to compute the reverse post order (RPO) provided to the client |
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6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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parents:
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changeset
|
537 |
int _post_order; // used to compute rpo |
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6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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parents:
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changeset
|
538 |
|
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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changeset
|
539 |
// Has this block been cloned for a loop backedge? |
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|
540 |
bool _backedge_copy; |
1 | 541 |
|
11445 | 542 |
// This block is entry to irreducible loop. |
543 |
bool _irreducible_entry; |
|
544 |
||
545 |
// This block has monitor entry point. |
|
546 |
bool _has_monitorenter; |
|
547 |
||
1 | 548 |
// A pointer used for our internal work list |
11445 | 549 |
bool _on_work_list; // on the work list |
1399
9648dfd4ce09
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changeset
|
550 |
Block* _next; |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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changeset
|
551 |
Block* _rpo_next; // Reverse post order list |
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6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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changeset
|
552 |
|
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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changeset
|
553 |
// Loop info |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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diff
changeset
|
554 |
Loop* _loop; // nearest loop |
1 | 555 |
|
556 |
ciBlock* ciblock() const { return _ciblock; } |
|
557 |
StateVector* state() const { return _state; } |
|
558 |
||
559 |
// Compute the exceptional successors and types for this Block. |
|
560 |
void compute_exceptions(); |
|
561 |
||
562 |
public: |
|
563 |
// constructors |
|
564 |
Block(ciTypeFlow* outer, ciBlock* ciblk, JsrSet* jsrs); |
|
565 |
||
566 |
void set_trap(int trap_bci, int trap_index) { |
|
567 |
_trap_bci = trap_bci; |
|
568 |
_trap_index = trap_index; |
|
569 |
assert(has_trap(), ""); |
|
570 |
} |
|
571 |
bool has_trap() const { return _trap_bci != -1; } |
|
572 |
int trap_bci() const { assert(has_trap(), ""); return _trap_bci; } |
|
573 |
int trap_index() const { assert(has_trap(), ""); return _trap_index; } |
|
574 |
||
575 |
// accessors |
|
576 |
ciTypeFlow* outer() const { return state()->outer(); } |
|
577 |
int start() const { return _ciblock->start_bci(); } |
|
578 |
int limit() const { return _ciblock->limit_bci(); } |
|
579 |
int control() const { return _ciblock->control_bci(); } |
|
1399
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|
580 |
JsrSet* jsrs() const { return _jsrs; } |
1 | 581 |
|
1399
9648dfd4ce09
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changeset
|
582 |
bool is_backedge_copy() const { return _backedge_copy; } |
9648dfd4ce09
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|
583 |
void set_backedge_copy(bool z); |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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changeset
|
584 |
int backedge_copy_count() const { return outer()->backedge_copy_count(ciblock()->index(), _jsrs); } |
1 | 585 |
|
586 |
// access to entry state |
|
587 |
int stack_size() const { return _state->stack_size(); } |
|
588 |
int monitor_count() const { return _state->monitor_count(); } |
|
589 |
ciType* local_type_at(int i) const { return _state->local_type_at(i); } |
|
590 |
ciType* stack_type_at(int i) const { return _state->stack_type_at(i); } |
|
591 |
||
1399
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|
592 |
// Data flow on locals |
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changeset
|
593 |
bool is_invariant_local(uint v) const { |
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parents:
1065
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changeset
|
594 |
assert(is_loop_head(), "only loop heads"); |
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|
595 |
// Find outermost loop with same loop head |
9648dfd4ce09
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|
596 |
Loop* lp = loop(); |
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changeset
|
597 |
while (lp->parent() != NULL) { |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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changeset
|
598 |
if (lp->parent()->head() != lp->head()) break; |
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parents:
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diff
changeset
|
599 |
lp = lp->parent(); |
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|
600 |
} |
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6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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|
601 |
return !lp->def_locals()->test(v); |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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|
602 |
} |
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6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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changeset
|
603 |
LocalSet* def_locals() { return _state->def_locals(); } |
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|
604 |
const LocalSet* def_locals() const { return _state->def_locals(); } |
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6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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|
605 |
|
1 | 606 |
// Get the successors for this Block. |
607 |
GrowableArray<Block*>* successors(ciBytecodeStream* str, |
|
608 |
StateVector* state, |
|
609 |
JsrSet* jsrs); |
|
610 |
GrowableArray<Block*>* successors() { |
|
611 |
assert(_successors != NULL, "must be filled in"); |
|
612 |
return _successors; |
|
613 |
} |
|
614 |
||
34151
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diff
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|
615 |
// Predecessors of this block (including exception edges) |
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|
616 |
GrowableArray<Block*>* predecessors() { |
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8140574: C2 must re-execute checks after deoptimizing from merged uncommon traps
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diff
changeset
|
617 |
assert(_predecessors != NULL, "must be filled in"); |
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diff
changeset
|
618 |
return _predecessors; |
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diff
changeset
|
619 |
} |
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changeset
|
620 |
|
1 | 621 |
// Get the exceptional successors for this Block. |
622 |
GrowableArray<Block*>* exceptions() { |
|
623 |
if (_exceptions == NULL) { |
|
624 |
compute_exceptions(); |
|
625 |
} |
|
626 |
return _exceptions; |
|
627 |
} |
|
628 |
||
629 |
// Get the exception klasses corresponding to the |
|
630 |
// exceptional successors for this Block. |
|
631 |
GrowableArray<ciInstanceKlass*>* exc_klasses() { |
|
632 |
if (_exc_klasses == NULL) { |
|
633 |
compute_exceptions(); |
|
634 |
} |
|
635 |
return _exc_klasses; |
|
636 |
} |
|
637 |
||
638 |
// Is this Block compatible with a given JsrSet? |
|
639 |
bool is_compatible_with(JsrSet* other) { |
|
640 |
return _jsrs->is_compatible_with(other); |
|
641 |
} |
|
642 |
||
643 |
// Copy the value of our state vector into another. |
|
644 |
void copy_state_into(StateVector* copy) const { |
|
645 |
_state->copy_into(copy); |
|
646 |
} |
|
647 |
||
648 |
// Copy the value of our JsrSet into another |
|
649 |
void copy_jsrs_into(JsrSet* copy) const { |
|
650 |
_jsrs->copy_into(copy); |
|
651 |
} |
|
652 |
||
653 |
// Meets the start state of this block with another state, destructively |
|
654 |
// modifying this one. Returns true if any modification takes place. |
|
655 |
bool meet(const StateVector* incoming) { |
|
656 |
return state()->meet(incoming); |
|
657 |
} |
|
658 |
||
659 |
// Ditto, except that the incoming state is coming from an |
|
660 |
// exception path. This means the stack is replaced by the |
|
661 |
// appropriate exception type. |
|
662 |
bool meet_exception(ciInstanceKlass* exc, const StateVector* incoming) { |
|
663 |
return state()->meet_exception(exc, incoming); |
|
664 |
} |
|
665 |
||
666 |
// Work list manipulation |
|
667 |
void set_next(Block* block) { _next = block; } |
|
668 |
Block* next() const { return _next; } |
|
669 |
||
670 |
void set_on_work_list(bool c) { _on_work_list = c; } |
|
671 |
bool is_on_work_list() const { return _on_work_list; } |
|
672 |
||
673 |
bool has_pre_order() const { return _pre_order >= 0; } |
|
1399
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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parents:
1065
diff
changeset
|
674 |
void set_pre_order(int po) { assert(!has_pre_order(), ""); _pre_order = po; } |
1 | 675 |
int pre_order() const { assert(has_pre_order(), ""); return _pre_order; } |
1399
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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1065
diff
changeset
|
676 |
void set_next_pre_order() { set_pre_order(outer()->inc_next_pre_order()); } |
1 | 677 |
bool is_start() const { return _pre_order == outer()->start_block_num(); } |
678 |
||
1399
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
679 |
// Reverse post order |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
680 |
void df_init(); |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
681 |
bool has_post_order() const { return _post_order >= 0; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
682 |
void set_post_order(int po) { assert(!has_post_order() && po >= 0, ""); _post_order = po; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
683 |
void reset_post_order(int o){ _post_order = o; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
684 |
int post_order() const { assert(has_post_order(), ""); return _post_order; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
685 |
|
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
686 |
bool has_rpo() const { return has_post_order() && outer()->have_block_count(); } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
687 |
int rpo() const { assert(has_rpo(), ""); return outer()->block_count() - post_order() - 1; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
688 |
void set_rpo_next(Block* b) { _rpo_next = b; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
689 |
Block* rpo_next() { return _rpo_next; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
690 |
|
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
691 |
// Loops |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
692 |
Loop* loop() const { return _loop; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
693 |
void set_loop(Loop* lp) { _loop = lp; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
694 |
bool is_loop_head() const { return _loop && _loop->head() == this; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
695 |
void set_irreducible_entry(bool c) { _irreducible_entry = c; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
696 |
bool is_irreducible_entry() const { return _irreducible_entry; } |
11445 | 697 |
void set_has_monitorenter() { _has_monitorenter = true; } |
698 |
bool has_monitorenter() const { return _has_monitorenter; } |
|
1399
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
699 |
bool is_visited() const { return has_pre_order(); } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
700 |
bool is_post_visited() const { return has_post_order(); } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
701 |
bool is_clonable_exit(Loop* lp); |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
702 |
Block* looping_succ(Loop* lp); // Successor inside of loop |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
703 |
bool is_single_entry_loop_head() const { |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
704 |
if (!is_loop_head()) return false; |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
705 |
for (Loop* lp = loop(); lp != NULL && lp->head() == this; lp = lp->parent()) |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
706 |
if (lp->is_irreducible()) return false; |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
707 |
return true; |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
708 |
} |
1 | 709 |
|
710 |
void print_value_on(outputStream* st) const PRODUCT_RETURN; |
|
711 |
void print_on(outputStream* st) const PRODUCT_RETURN; |
|
712 |
}; |
|
713 |
||
1399
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
714 |
// Loop |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
715 |
class Loop : public ResourceObj { |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
716 |
private: |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
717 |
Loop* _parent; |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
718 |
Loop* _sibling; // List of siblings, null terminated |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
719 |
Loop* _child; // Head of child list threaded thru sibling pointer |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
720 |
Block* _head; // Head of loop |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
721 |
Block* _tail; // Tail of loop |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
722 |
bool _irreducible; |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
723 |
LocalSet _def_locals; |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
724 |
|
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
725 |
public: |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
726 |
Loop(Block* head, Block* tail) : |
51333
f6641fcf7b7e
8208670: Compiler changes to allow enabling -Wreorder
tschatzl
parents:
49373
diff
changeset
|
727 |
_parent(NULL), _sibling(NULL), _child(NULL), |
1399
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
728 |
_head(head), _tail(tail), |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
729 |
_irreducible(false), _def_locals() {} |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
730 |
|
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
731 |
Loop* parent() const { return _parent; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
732 |
Loop* sibling() const { return _sibling; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
733 |
Loop* child() const { return _child; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
734 |
Block* head() const { return _head; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
735 |
Block* tail() const { return _tail; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
736 |
void set_parent(Loop* p) { _parent = p; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
737 |
void set_sibling(Loop* s) { _sibling = s; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
738 |
void set_child(Loop* c) { _child = c; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
739 |
void set_head(Block* hd) { _head = hd; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
740 |
void set_tail(Block* tl) { _tail = tl; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
741 |
|
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
742 |
int depth() const; // nesting depth |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
743 |
|
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
744 |
// Returns true if lp is a nested loop or us. |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
745 |
bool contains(Loop* lp) const; |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
746 |
bool contains(Block* blk) const { return contains(blk->loop()); } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
747 |
|
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
748 |
// Data flow on locals |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
749 |
LocalSet* def_locals() { return &_def_locals; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
750 |
const LocalSet* def_locals() const { return &_def_locals; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
751 |
|
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
752 |
// Merge the branch lp into this branch, sorting on the loop head |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
753 |
// pre_orders. Returns the new branch. |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
754 |
Loop* sorted_merge(Loop* lp); |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
755 |
|
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
756 |
// Mark non-single entry to loop |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
757 |
void set_irreducible(Block* entry) { |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
758 |
_irreducible = true; |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
759 |
entry->set_irreducible_entry(true); |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
760 |
} |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
761 |
bool is_irreducible() const { return _irreducible; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
762 |
|
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
763 |
bool is_root() const { return _tail->pre_order() == max_jint; } |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
764 |
|
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
765 |
void print(outputStream* st = tty, int indent = 0) const PRODUCT_RETURN; |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
766 |
}; |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
767 |
|
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
768 |
// Postorder iteration over the loop tree. |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
769 |
class PostorderLoops : public StackObj { |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
770 |
private: |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
771 |
Loop* _root; |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
772 |
Loop* _current; |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
773 |
public: |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
774 |
PostorderLoops(Loop* root) : _root(root), _current(root) { |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
775 |
while (_current->child() != NULL) { |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
776 |
_current = _current->child(); |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
777 |
} |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
778 |
} |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
779 |
bool done() { return _current == NULL; } // Finished iterating? |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
780 |
void next(); // Advance to next loop |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents:
1065
diff
changeset
|
781 |
Loop* current() { return _current; } // Return current loop. |
9648dfd4ce09
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|
782 |
}; |
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changeset
|
783 |
|
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|
784 |
// Preorder iteration over the loop tree. |
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|
785 |
class PreorderLoops : public StackObj { |
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|
786 |
private: |
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|
787 |
Loop* _root; |
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|
788 |
Loop* _current; |
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|
789 |
public: |
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|
790 |
PreorderLoops(Loop* root) : _root(root), _current(root) {} |
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|
791 |
bool done() { return _current == NULL; } // Finished iterating? |
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|
792 |
void next(); // Advance to next loop |
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|
793 |
Loop* current() { return _current; } // Return current loop. |
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|
794 |
}; |
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|
795 |
|
1 | 796 |
// Standard indexes of successors, for various bytecodes. |
797 |
enum { |
|
798 |
FALL_THROUGH = 0, // normal control |
|
799 |
IF_NOT_TAKEN = 0, // the not-taken branch of an if (i.e., fall-through) |
|
800 |
IF_TAKEN = 1, // the taken branch of an if |
|
801 |
GOTO_TARGET = 0, // unique successor for goto, jsr, or ret |
|
802 |
SWITCH_DEFAULT = 0, // default branch of a switch |
|
803 |
SWITCH_CASES = 1 // first index for any non-default switch branches |
|
804 |
// Unlike in other blocks, the successors of a switch are listed uniquely. |
|
805 |
}; |
|
806 |
||
807 |
private: |
|
808 |
// A mapping from pre_order to Blocks. This array is created |
|
809 |
// only at the end of the flow. |
|
810 |
Block** _block_map; |
|
811 |
||
812 |
// For each ciBlock index, a list of Blocks which share this ciBlock. |
|
813 |
GrowableArray<Block*>** _idx_to_blocklist; |
|
814 |
// count of ciBlocks |
|
815 |
int _ciblock_count; |
|
816 |
||
817 |
// Tells if a given instruction is able to generate an exception edge. |
|
818 |
bool can_trap(ciBytecodeStream& str); |
|
819 |
||
1399
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|
820 |
// Clone the loop heads. Returns true if any cloning occurred. |
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|
821 |
bool clone_loop_heads(Loop* lp, StateVector* temp_vector, JsrSet* temp_set); |
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|
822 |
|
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|
823 |
// Clone lp's head and replace tail's successors with clone. |
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|
824 |
Block* clone_loop_head(Loop* lp, StateVector* temp_vector, JsrSet* temp_set); |
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|
825 |
|
1 | 826 |
public: |
827 |
// Return the block beginning at bci which has a JsrSet compatible |
|
828 |
// with jsrs. |
|
829 |
Block* block_at(int bci, JsrSet* set, CreateOption option = create_public_copy); |
|
830 |
||
831 |
// block factory |
|
832 |
Block* get_block_for(int ciBlockIndex, JsrSet* jsrs, CreateOption option = create_public_copy); |
|
833 |
||
1399
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|
834 |
// How many of the blocks have the backedge_copy bit set? |
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|
835 |
int backedge_copy_count(int ciBlockIndex, JsrSet* jsrs) const; |
1 | 836 |
|
837 |
// Return an existing block containing bci which has a JsrSet compatible |
|
838 |
// with jsrs, or NULL if there is none. |
|
839 |
Block* existing_block_at(int bci, JsrSet* set) { return block_at(bci, set, no_create); } |
|
840 |
||
841 |
// Tell whether the flow analysis has encountered an error of some sort. |
|
842 |
bool failing() { return env()->failing() || _failure_reason != NULL; } |
|
843 |
||
844 |
// Reason this compilation is failing, such as "too many basic blocks". |
|
845 |
const char* failure_reason() { return _failure_reason; } |
|
846 |
||
847 |
// Note a failure. |
|
848 |
void record_failure(const char* reason); |
|
849 |
||
850 |
// Return the block of a given pre-order number. |
|
851 |
int have_block_count() const { return _block_map != NULL; } |
|
852 |
int block_count() const { assert(have_block_count(), ""); |
|
853 |
return _next_pre_order; } |
|
854 |
Block* pre_order_at(int po) const { assert(0 <= po && po < block_count(), "out of bounds"); |
|
855 |
return _block_map[po]; } |
|
856 |
Block* start_block() const { return pre_order_at(start_block_num()); } |
|
857 |
int start_block_num() const { return 0; } |
|
1399
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|
858 |
Block* rpo_at(int rpo) const { assert(0 <= rpo && rpo < block_count(), "out of bounds"); |
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|
859 |
return _block_map[rpo]; } |
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|
860 |
int next_pre_order() { return _next_pre_order; } |
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|
861 |
int inc_next_pre_order() { return _next_pre_order++; } |
1 | 862 |
|
863 |
private: |
|
864 |
// A work list used during flow analysis. |
|
865 |
Block* _work_list; |
|
866 |
||
1399
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|
867 |
// List of blocks in reverse post order |
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|
868 |
Block* _rpo_list; |
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|
869 |
|
1 | 870 |
// Next Block::_pre_order. After mapping, doubles as block_count. |
871 |
int _next_pre_order; |
|
872 |
||
873 |
// Are there more blocks on the work list? |
|
874 |
bool work_list_empty() { return _work_list == NULL; } |
|
875 |
||
876 |
// Get the next basic block from our work list. |
|
877 |
Block* work_list_next(); |
|
878 |
||
879 |
// Add a basic block to our work list. |
|
880 |
void add_to_work_list(Block* block); |
|
881 |
||
1399
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|
882 |
// Prepend a basic block to rpo list. |
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|
883 |
void prepend_to_rpo_list(Block* blk) { |
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|
884 |
blk->set_rpo_next(_rpo_list); |
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|
885 |
_rpo_list = blk; |
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|
886 |
} |
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|
887 |
|
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|
888 |
// Root of the loop tree |
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|
889 |
Loop* _loop_tree_root; |
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|
890 |
|
1 | 891 |
// State used for make_jsr_record |
892 |
int _jsr_count; |
|
893 |
GrowableArray<JsrRecord*>* _jsr_records; |
|
894 |
||
895 |
public: |
|
896 |
// Make a JsrRecord for a given (entry, return) pair, if such a record |
|
897 |
// does not already exist. |
|
898 |
JsrRecord* make_jsr_record(int entry_address, int return_address); |
|
899 |
||
1399
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|
900 |
void set_loop_tree_root(Loop* ltr) { _loop_tree_root = ltr; } |
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changeset
|
901 |
Loop* loop_tree_root() { return _loop_tree_root; } |
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changeset
|
902 |
|
1 | 903 |
private: |
904 |
// Get the initial state for start_bci: |
|
905 |
const StateVector* get_start_state(); |
|
906 |
||
907 |
// Merge the current state into all exceptional successors at the |
|
908 |
// current point in the code. |
|
909 |
void flow_exceptions(GrowableArray<Block*>* exceptions, |
|
910 |
GrowableArray<ciInstanceKlass*>* exc_klasses, |
|
911 |
StateVector* state); |
|
912 |
||
913 |
// Merge the current state into all successors at the current point |
|
914 |
// in the code. |
|
915 |
void flow_successors(GrowableArray<Block*>* successors, |
|
916 |
StateVector* state); |
|
917 |
||
918 |
// Interpret the effects of the bytecodes on the incoming state |
|
919 |
// vector of a basic block. Push the changed state to succeeding |
|
920 |
// basic blocks. |
|
921 |
void flow_block(Block* block, |
|
922 |
StateVector* scratch_state, |
|
923 |
JsrSet* scratch_jsrs); |
|
924 |
||
925 |
// Perform the type flow analysis, creating and cloning Blocks as |
|
926 |
// necessary. |
|
927 |
void flow_types(); |
|
928 |
||
1399
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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|
929 |
// Perform the depth first type flow analysis. Helper for flow_types. |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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changeset
|
930 |
void df_flow_types(Block* start, |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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diff
changeset
|
931 |
bool do_flow, |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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1065
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changeset
|
932 |
StateVector* temp_vector, |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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changeset
|
933 |
JsrSet* temp_set); |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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diff
changeset
|
934 |
|
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6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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parents:
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changeset
|
935 |
// Incrementally build loop tree. |
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6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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1065
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changeset
|
936 |
void build_loop_tree(Block* blk); |
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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diff
changeset
|
937 |
|
1 | 938 |
// Create the block map, which indexes blocks in pre_order. |
939 |
void map_blocks(); |
|
940 |
||
941 |
public: |
|
942 |
// Perform type inference flow analysis. |
|
943 |
void do_flow(); |
|
944 |
||
34151
8e0bebdbc29e
8140574: C2 must re-execute checks after deoptimizing from merged uncommon traps
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parents:
13963
diff
changeset
|
945 |
// Determine if bci is dominated by dom_bci |
8e0bebdbc29e
8140574: C2 must re-execute checks after deoptimizing from merged uncommon traps
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parents:
13963
diff
changeset
|
946 |
bool is_dominated_by(int bci, int dom_bci); |
8e0bebdbc29e
8140574: C2 must re-execute checks after deoptimizing from merged uncommon traps
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diff
changeset
|
947 |
|
1 | 948 |
void print_on(outputStream* st) const PRODUCT_RETURN; |
1399
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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parents:
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diff
changeset
|
949 |
|
9648dfd4ce09
6384206: Phis which are later unneeded are impairing our ability to inline based on static types
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diff
changeset
|
950 |
void rpo_print_on(outputStream* st) const PRODUCT_RETURN; |
1 | 951 |
}; |
7397 | 952 |
|
953 |
#endif // SHARE_VM_CI_CITYPEFLOW_HPP |