Samir Jindel
c1df0d4c10
If the left-hand side of the store is an allocation and no GC-triggering instructions have been executed since, it is safe to elide the store barrier. This gives a 1.4% code size reduction on Flutter Gallery ARM32. Change-Id: Ib7227d3ef9d798d5e30f238f3f789f9a2e637d6a Cq-Include-Trybots: luci.dart.try: vm-kernel-optcounter-threshold-linux-release-x64-try,vm-kernel-precomp-linux-debug-x64-try,vm-kernel-precomp-linux-release-simarm-try,vm-kernel-precomp-linux-release-simarm64-try,vm-kernel-precomp-linux-release-x64-try,vm-kernel-precomp-win-release-x64-try Reviewed-on: https://dart-review.googlesource.com/64687 Commit-Queue: Samir Jindel <sjindel@google.com> Reviewed-by: Alexander Markov <alexmarkov@google.com> Reviewed-by: Ryan Macnak <rmacnak@google.com>
104 lines
2.3 KiB
C++
104 lines
2.3 KiB
C++
// Copyright (c) 2018, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef RUNTIME_VM_COMPILER_BACKEND_CODE_STATISTICS_H_
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#define RUNTIME_VM_COMPILER_BACKEND_CODE_STATISTICS_H_
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#include "vm/compiler/assembler/assembler.h"
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#include "vm/compiler/backend/il.h"
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#include "vm/object.h"
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namespace dart {
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class CombinedCodeStatistics {
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public:
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// clang-format off
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enum EntryCounter {
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#define DO(type, attrs) kTag##type,
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FOR_EACH_INSTRUCTION(DO)
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#undef DO
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#define DO(type, attrs) kTag##type##SlowPath,
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FOR_EACH_INSTRUCTION(DO)
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#undef DO
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kTagAssertAssignableParameterCheck,
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kTagAssertAssignableInsertedByFrontend,
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kTagAssertAssignableFromSource,
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kTagCheckedEntry,
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kTagIntrinsics,
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kNumEntries,
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};
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// clang-format on
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CombinedCodeStatistics();
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void Begin(Instruction* instruction);
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void End(Instruction* instruction);
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void DumpStatistics();
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static EntryCounter SlowPathCounterFor(Instruction::Tag tag) {
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return static_cast<CombinedCodeStatistics::EntryCounter>(
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CombinedCodeStatistics::kTagGraphEntrySlowPath + tag);
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}
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private:
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friend class CodeStatistics;
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static int CompareEntries(const void* a, const void* b);
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typedef struct {
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const char* name;
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intptr_t bytes;
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intptr_t count;
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} Entry;
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Entry entries_[kNumEntries];
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intptr_t unaccounted_bytes_;
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intptr_t alignment_bytes_;
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intptr_t object_header_bytes_;
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intptr_t return_const_count_;
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intptr_t return_const_with_load_field_count_;
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};
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class CodeStatistics {
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public:
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explicit CodeStatistics(Assembler* assembler);
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void Begin(Instruction* instruction);
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void End(Instruction* instruction);
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void SpecialBegin(intptr_t tag);
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void SpecialEnd(intptr_t tag);
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void AppendTo(CombinedCodeStatistics* stat);
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void Finalize();
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private:
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static const int kStackSize = 8;
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Assembler* assembler_;
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typedef struct {
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intptr_t bytes;
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intptr_t count;
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} Entry;
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Entry entries_[CombinedCodeStatistics::kNumEntries];
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intptr_t instruction_bytes_;
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intptr_t unaccounted_bytes_;
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intptr_t alignment_bytes_;
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intptr_t stack_[kStackSize];
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intptr_t stack_index_;
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};
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} // namespace dart
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#endif // RUNTIME_VM_COMPILER_BACKEND_CODE_STATISTICS_H_
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