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Issue 1177123002: Decompiler improvements. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 5 years, 6 months ago
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1 // Copyright 2013 the V8 project authors. All rights reserved. 1 // Copyright 2013 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "src/compiler/code-generator.h" 5 #include "src/compiler/code-generator.h"
6 6
7 #include "src/compiler/code-generator-impl.h" 7 #include "src/compiler/code-generator-impl.h"
8 #include "src/compiler/linkage.h" 8 #include "src/compiler/linkage.h"
9 #include "src/compiler/pipeline.h" 9 #include "src/compiler/pipeline.h"
10 10
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89 if (block->IsDeferred() == (deferred == 0)) { 89 if (block->IsDeferred() == (deferred == 0)) {
90 continue; 90 continue;
91 } 91 }
92 // Align loop headers on 16-byte boundaries. 92 // Align loop headers on 16-byte boundaries.
93 if (block->IsLoopHeader()) masm()->Align(16); 93 if (block->IsLoopHeader()) masm()->Align(16);
94 // Bind a label for a block. 94 // Bind a label for a block.
95 current_block_ = block->rpo_number(); 95 current_block_ = block->rpo_number();
96 if (FLAG_code_comments) { 96 if (FLAG_code_comments) {
97 // TODO(titzer): these code comments are a giant memory leak. 97 // TODO(titzer): these code comments are a giant memory leak.
98 Vector<char> buffer = Vector<char>::New(200); 98 Vector<char> buffer = Vector<char>::New(200);
99 SNPrintF(buffer, "-- B%d start%s%s%s%s --", block->rpo_number().ToInt(), 99 char* buffer_start = buffer.start();
100 block->IsDeferred() ? " (deferred)" : "", 100
101 block->needs_frame() ? "" : " (no frame)", 101 int next = SNPrintF(
102 block->must_construct_frame() ? " (construct frame)" : "", 102 buffer, "-- B%d start%s%s%s%s", block->rpo_number().ToInt(),
103 block->must_deconstruct_frame() ? " (deconstruct frame)" : ""); 103 block->IsDeferred() ? " (deferred)" : "",
104 masm()->RecordComment(buffer.start()); 104 block->needs_frame() ? "" : " (no frame)",
105 block->must_construct_frame() ? " (construct frame)" : "",
106 block->must_deconstruct_frame() ? " (deconstruct frame)" : "");
107
108 buffer = buffer.SubVector(next, buffer.length());
109
110 if (block->IsLoopHeader()) {
111 next =
112 SNPrintF(buffer, " (loop up to %d)", block->loop_end().ToInt());
113 buffer = buffer.SubVector(next, buffer.length());
114 }
115 if (block->loop_header().IsValid()) {
116 next =
117 SNPrintF(buffer, " (in loop %d)", block->loop_header().ToInt());
118 buffer = buffer.SubVector(next, buffer.length());
119 }
120 SNPrintF(buffer, " --");
121 masm()->RecordComment(buffer_start);
105 } 122 }
106 masm()->bind(GetLabel(current_block_)); 123 masm()->bind(GetLabel(current_block_));
107 for (int i = block->code_start(); i < block->code_end(); ++i) { 124 for (int i = block->code_start(); i < block->code_end(); ++i) {
108 AssembleInstruction(code()->InstructionAt(i)); 125 AssembleInstruction(code()->InstructionAt(i));
109 } 126 }
110 } 127 }
111 } 128 }
112 129
113 // Assemble all out-of-line code. 130 // Assemble all out-of-line code.
114 if (ools_) { 131 if (ools_) {
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691 : masm_(gen->masm()), next_(gen->ools_) { 708 : masm_(gen->masm()), next_(gen->ools_) {
692 gen->ools_ = this; 709 gen->ools_ = this;
693 } 710 }
694 711
695 712
696 OutOfLineCode::~OutOfLineCode() {} 713 OutOfLineCode::~OutOfLineCode() {}
697 714
698 } // namespace compiler 715 } // namespace compiler
699 } // namespace internal 716 } // namespace internal
700 } // namespace v8 717 } // namespace v8
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