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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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4748 | 4748 |
4749 class HAdd V8_FINAL : public HArithmeticBinaryOperation { | 4749 class HAdd V8_FINAL : public HArithmeticBinaryOperation { |
4750 public: | 4750 public: |
4751 static HInstruction* New(Zone* zone, | 4751 static HInstruction* New(Zone* zone, |
4752 HValue* context, | 4752 HValue* context, |
4753 HValue* left, | 4753 HValue* left, |
4754 HValue* right); | 4754 HValue* right); |
4755 | 4755 |
4756 // Add is only commutative if two integer values are added and not if two | 4756 // Add is only commutative if two integer values are added and not if two |
4757 // tagged values are added (because it might be a String concatenation). | 4757 // tagged values are added (because it might be a String concatenation). |
4758 // We also do not commute (pointer + offset). | |
4758 virtual bool IsCommutative() const V8_OVERRIDE { | 4759 virtual bool IsCommutative() const V8_OVERRIDE { |
4759 return !representation().IsTagged(); | 4760 return !representation().IsTagged() && !representation().IsExternal(); |
4760 } | 4761 } |
4761 | 4762 |
4762 virtual HValue* EnsureAndPropagateNotMinusZero( | 4763 virtual HValue* EnsureAndPropagateNotMinusZero( |
4763 BitVector* visited) V8_OVERRIDE; | 4764 BitVector* visited) V8_OVERRIDE; |
4764 | 4765 |
4765 virtual HValue* Canonicalize() V8_OVERRIDE; | 4766 virtual HValue* Canonicalize() V8_OVERRIDE; |
4766 | 4767 |
4767 virtual bool TryDecompose(DecompositionResult* decomposition) V8_OVERRIDE { | 4768 virtual bool TryDecompose(DecompositionResult* decomposition) V8_OVERRIDE { |
4768 if (left()->IsInteger32Constant()) { | 4769 if (left()->IsInteger32Constant()) { |
4769 decomposition->Apply(right(), left()->GetInteger32Constant()); | 4770 decomposition->Apply(right(), left()->GetInteger32Constant()); |
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4785 (left()->ToNumberCanBeObserved() || right()->ToNumberCanBeObserved() || | 4786 (left()->ToNumberCanBeObserved() || right()->ToNumberCanBeObserved() || |
4786 left()->ToStringCanBeObserved() || right()->ToStringCanBeObserved())) { | 4787 left()->ToStringCanBeObserved() || right()->ToStringCanBeObserved())) { |
4787 SetAllSideEffects(); | 4788 SetAllSideEffects(); |
4788 ClearFlag(kUseGVN); | 4789 ClearFlag(kUseGVN); |
4789 } else { | 4790 } else { |
4790 ClearAllSideEffects(); | 4791 ClearAllSideEffects(); |
4791 SetFlag(kUseGVN); | 4792 SetFlag(kUseGVN); |
4792 } | 4793 } |
4793 } | 4794 } |
4794 | 4795 |
4796 virtual Representation RepresentationFromInputs() V8_OVERRIDE; | |
4797 | |
4798 virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE; | |
4799 | |
4795 DECLARE_CONCRETE_INSTRUCTION(Add) | 4800 DECLARE_CONCRETE_INSTRUCTION(Add) |
4796 | 4801 |
4797 protected: | 4802 protected: |
4798 virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } | 4803 virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; } |
4799 | 4804 |
4800 virtual Range* InferRange(Zone* zone) V8_OVERRIDE; | 4805 virtual Range* InferRange(Zone* zone) V8_OVERRIDE; |
4801 | 4806 |
4802 private: | 4807 private: |
4803 HAdd(HValue* context, HValue* left, HValue* right) | 4808 HAdd(HValue* context, HValue* left, HValue* right) |
4804 : HArithmeticBinaryOperation(context, left, right) { | 4809 : HArithmeticBinaryOperation(context, left, right) { |
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6078 static HObjectAccess ForBackingStoreOffset(int offset, | 6083 static HObjectAccess ForBackingStoreOffset(int offset, |
6079 Representation representation = Representation::Tagged()); | 6084 Representation representation = Representation::Tagged()); |
6080 | 6085 |
6081 // Create an access to a resolved field (in-object or backing store). | 6086 // Create an access to a resolved field (in-object or backing store). |
6082 static HObjectAccess ForField(Handle<Map> map, | 6087 static HObjectAccess ForField(Handle<Map> map, |
6083 LookupResult *lookup, Handle<String> name = Handle<String>::null()); | 6088 LookupResult *lookup, Handle<String> name = Handle<String>::null()); |
6084 | 6089 |
6085 // Create an access for the payload of a Cell or JSGlobalPropertyCell. | 6090 // Create an access for the payload of a Cell or JSGlobalPropertyCell. |
6086 static HObjectAccess ForCellPayload(Isolate* isolate); | 6091 static HObjectAccess ForCellPayload(Isolate* isolate); |
6087 | 6092 |
6093 static HObjectAccess ForJSTypedArrayLength() { | |
6094 return HObjectAccess::ForJSObjectOffset(JSTypedArray::kLengthOffset); | |
6095 } | |
6096 | |
6097 static HObjectAccess ForJSArrayBufferBackingStore() { | |
6098 return HObjectAccess::ForJSObjectOffset( | |
6099 JSArrayBuffer::kBackingStoreOffset, Representation::External()); | |
6100 } | |
6101 | |
6102 static HObjectAccess ForExternalArrayExternalPointer() { | |
6103 return HObjectAccess::ForJSObjectOffset( | |
6104 ExternalArray::kExternalPointerOffset, Representation::External()); | |
6105 } | |
6106 | |
6107 | |
danno
2013/11/25 11:44:13
nit: perhaps only one line between functions
| |
6108 static HObjectAccess ForJSArrayBufferViewWeakNext() { | |
6109 return HObjectAccess::ForJSObjectOffset(JSArrayBufferView::kWeakNextOffset); | |
6110 } | |
6111 | |
6112 static HObjectAccess ForJSArrayBufferWeakFirstView() { | |
6113 return HObjectAccess::ForJSObjectOffset( | |
6114 JSArrayBuffer::kWeakFirstViewOffset); | |
6115 } | |
6116 | |
6117 static HObjectAccess ForJSArrayBufferViewBuffer() { | |
6118 return HObjectAccess::ForJSObjectOffset(JSArrayBufferView::kBufferOffset); | |
6119 } | |
6120 | |
6121 static HObjectAccess ForJSArrayBufferViewByteOffset() { | |
6122 return HObjectAccess::ForJSObjectOffset( | |
6123 JSArrayBufferView::kByteOffsetOffset); | |
6124 } | |
6125 | |
6126 static HObjectAccess ForJSArrayBufferViewByteLength() { | |
6127 return HObjectAccess::ForJSObjectOffset( | |
6128 JSArrayBufferView::kByteLengthOffset); | |
6129 } | |
6088 void PrintTo(StringStream* stream); | 6130 void PrintTo(StringStream* stream); |
danno
2013/11/25 11:44:13
nit: perhaps one line above?
| |
6089 | 6131 |
6090 inline bool Equals(HObjectAccess that) const { | 6132 inline bool Equals(HObjectAccess that) const { |
6091 return value_ == that.value_; // portion and offset must match | 6133 return value_ == that.value_; // portion and offset must match |
6092 } | 6134 } |
6093 | 6135 |
6094 protected: | 6136 protected: |
6095 void SetGVNFlags(HValue *instr, bool is_store); | 6137 void SetGVNFlags(HValue *instr, bool is_store); |
6096 | 6138 |
6097 private: | 6139 private: |
6098 // internal use only; different parts of an object or array | 6140 // internal use only; different parts of an object or array |
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6494 } else if (index == 1) { | 6536 } else if (index == 1) { |
6495 if (field_representation().IsInteger8() || | 6537 if (field_representation().IsInteger8() || |
6496 field_representation().IsUInteger8() || | 6538 field_representation().IsUInteger8() || |
6497 field_representation().IsInteger16() || | 6539 field_representation().IsInteger16() || |
6498 field_representation().IsUInteger16() || | 6540 field_representation().IsUInteger16() || |
6499 field_representation().IsInteger32()) { | 6541 field_representation().IsInteger32()) { |
6500 return Representation::Integer32(); | 6542 return Representation::Integer32(); |
6501 } else if (field_representation().IsDouble() || | 6543 } else if (field_representation().IsDouble() || |
6502 field_representation().IsSmi()) { | 6544 field_representation().IsSmi()) { |
6503 return field_representation(); | 6545 return field_representation(); |
6546 } else if (field_representation().IsExternal()) { | |
6547 return Representation::External(); | |
6504 } | 6548 } |
6505 } | 6549 } |
6506 return Representation::Tagged(); | 6550 return Representation::Tagged(); |
6507 } | 6551 } |
6508 virtual void HandleSideEffectDominator(GVNFlag side_effect, | 6552 virtual void HandleSideEffectDominator(GVNFlag side_effect, |
6509 HValue* dominator) V8_OVERRIDE { | 6553 HValue* dominator) V8_OVERRIDE { |
6510 ASSERT(side_effect == kChangesNewSpacePromotion); | 6554 ASSERT(side_effect == kChangesNewSpacePromotion); |
6511 new_space_dominator_ = dominator; | 6555 new_space_dominator_ = dominator; |
6512 } | 6556 } |
6513 virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; | 6557 virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE; |
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7450 virtual bool IsDeletable() const V8_OVERRIDE { return true; } | 7494 virtual bool IsDeletable() const V8_OVERRIDE { return true; } |
7451 }; | 7495 }; |
7452 | 7496 |
7453 | 7497 |
7454 #undef DECLARE_INSTRUCTION | 7498 #undef DECLARE_INSTRUCTION |
7455 #undef DECLARE_CONCRETE_INSTRUCTION | 7499 #undef DECLARE_CONCRETE_INSTRUCTION |
7456 | 7500 |
7457 } } // namespace v8::internal | 7501 } } // namespace v8::internal |
7458 | 7502 |
7459 #endif // V8_HYDROGEN_INSTRUCTIONS_H_ | 7503 #endif // V8_HYDROGEN_INSTRUCTIONS_H_ |
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