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Issue 526223002: Use Chrome compatible naming for compiler specifics. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: mips Created 6 years, 3 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 #ifndef V8_HYDROGEN_GVN_H_ 5 #ifndef V8_HYDROGEN_GVN_H_
6 #define V8_HYDROGEN_GVN_H_ 6 #define V8_HYDROGEN_GVN_H_
7 7
8 #include "src/compiler.h" 8 #include "src/compiler.h"
9 #include "src/hydrogen.h" 9 #include "src/hydrogen.h"
10 #include "src/hydrogen-instructions.h" 10 #include "src/hydrogen-instructions.h"
11 #include "src/zone.h" 11 #include "src/zone.h"
12 12
13 namespace v8 { 13 namespace v8 {
14 namespace internal { 14 namespace internal {
15 15
16 class OStream; 16 class OStream;
17 17
18 // This class extends GVNFlagSet with additional "special" dynamic side effects, 18 // This class extends GVNFlagSet with additional "special" dynamic side effects,
19 // which can be used to represent side effects that cannot be expressed using 19 // which can be used to represent side effects that cannot be expressed using
20 // the GVNFlags of an HInstruction. These special side effects are tracked by a 20 // the GVNFlags of an HInstruction. These special side effects are tracked by a
21 // SideEffectsTracker (see below). 21 // SideEffectsTracker (see below).
22 class SideEffects V8_FINAL { 22 class SideEffects FINAL {
23 public: 23 public:
24 static const int kNumberOfSpecials = 64 - kNumberOfFlags; 24 static const int kNumberOfSpecials = 64 - kNumberOfFlags;
25 25
26 SideEffects() : bits_(0) { 26 SideEffects() : bits_(0) {
27 DCHECK(kNumberOfFlags + kNumberOfSpecials == sizeof(bits_) * CHAR_BIT); 27 DCHECK(kNumberOfFlags + kNumberOfSpecials == sizeof(bits_) * CHAR_BIT);
28 } 28 }
29 explicit SideEffects(GVNFlagSet flags) : bits_(flags.ToIntegral()) {} 29 explicit SideEffects(GVNFlagSet flags) : bits_(flags.ToIntegral()) {}
30 bool IsEmpty() const { return bits_ == 0; } 30 bool IsEmpty() const { return bits_ == 0; }
31 bool ContainsFlag(GVNFlag flag) const { 31 bool ContainsFlag(GVNFlag flag) const {
32 return (bits_ & MaskFlag(flag)) != 0; 32 return (bits_ & MaskFlag(flag)) != 0;
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56 }; 56 };
57 57
58 58
59 struct TrackedEffects; 59 struct TrackedEffects;
60 60
61 // Tracks global variable and inobject field loads/stores in a fine grained 61 // Tracks global variable and inobject field loads/stores in a fine grained
62 // fashion, and represents them using the "special" dynamic side effects of the 62 // fashion, and represents them using the "special" dynamic side effects of the
63 // SideEffects class (see above). This way unrelated global variable/inobject 63 // SideEffects class (see above). This way unrelated global variable/inobject
64 // field stores don't prevent hoisting and merging of global variable/inobject 64 // field stores don't prevent hoisting and merging of global variable/inobject
65 // field loads. 65 // field loads.
66 class SideEffectsTracker V8_FINAL BASE_EMBEDDED { 66 class SideEffectsTracker FINAL BASE_EMBEDDED {
67 public: 67 public:
68 SideEffectsTracker() : num_global_vars_(0), num_inobject_fields_(0) {} 68 SideEffectsTracker() : num_global_vars_(0), num_inobject_fields_(0) {}
69 SideEffects ComputeChanges(HInstruction* instr); 69 SideEffects ComputeChanges(HInstruction* instr);
70 SideEffects ComputeDependsOn(HInstruction* instr); 70 SideEffects ComputeDependsOn(HInstruction* instr);
71 71
72 private: 72 private:
73 friend OStream& operator<<(OStream& os, const TrackedEffects& f); 73 friend OStream& operator<<(OStream& os, const TrackedEffects& f);
74 bool ComputeGlobalVar(Unique<Cell> cell, int* index); 74 bool ComputeGlobalVar(Unique<Cell> cell, int* index);
75 bool ComputeInobjectField(HObjectAccess access, int* index); 75 bool ComputeInobjectField(HObjectAccess access, int* index);
76 76
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104 : tracker(t), effects(e) {} 104 : tracker(t), effects(e) {}
105 SideEffectsTracker* tracker; 105 SideEffectsTracker* tracker;
106 SideEffects effects; 106 SideEffects effects;
107 }; 107 };
108 108
109 109
110 OStream& operator<<(OStream& os, const TrackedEffects& f); 110 OStream& operator<<(OStream& os, const TrackedEffects& f);
111 111
112 112
113 // Perform common subexpression elimination and loop-invariant code motion. 113 // Perform common subexpression elimination and loop-invariant code motion.
114 class HGlobalValueNumberingPhase V8_FINAL : public HPhase { 114 class HGlobalValueNumberingPhase FINAL : public HPhase {
115 public: 115 public:
116 explicit HGlobalValueNumberingPhase(HGraph* graph); 116 explicit HGlobalValueNumberingPhase(HGraph* graph);
117 117
118 void Run(); 118 void Run();
119 119
120 private: 120 private:
121 SideEffects CollectSideEffectsOnPathsToDominatedBlock( 121 SideEffects CollectSideEffectsOnPathsToDominatedBlock(
122 HBasicBlock* dominator, 122 HBasicBlock* dominator,
123 HBasicBlock* dominated); 123 HBasicBlock* dominated);
124 void AnalyzeGraph(); 124 void AnalyzeGraph();
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145 // Used when collecting side effects on paths from dominator to 145 // Used when collecting side effects on paths from dominator to
146 // dominated. 146 // dominated.
147 BitVector visited_on_paths_; 147 BitVector visited_on_paths_;
148 148
149 DISALLOW_COPY_AND_ASSIGN(HGlobalValueNumberingPhase); 149 DISALLOW_COPY_AND_ASSIGN(HGlobalValueNumberingPhase);
150 }; 150 };
151 151
152 } } // namespace v8::internal 152 } } // namespace v8::internal
153 153
154 #endif // V8_HYDROGEN_GVN_H_ 154 #endif // V8_HYDROGEN_GVN_H_
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