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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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97 V(CompareIDAndBranch) \ | 97 V(CompareIDAndBranch) \ |
98 V(CompareGeneric) \ | 98 V(CompareGeneric) \ |
99 V(CompareObjectEqAndBranch) \ | 99 V(CompareObjectEqAndBranch) \ |
100 V(CompareMap) \ | 100 V(CompareMap) \ |
101 V(CompareConstantEqAndBranch) \ | 101 V(CompareConstantEqAndBranch) \ |
102 V(Constant) \ | 102 V(Constant) \ |
103 V(Context) \ | 103 V(Context) \ |
104 V(DebugBreak) \ | 104 V(DebugBreak) \ |
105 V(DeclareGlobals) \ | 105 V(DeclareGlobals) \ |
106 V(DeleteProperty) \ | 106 V(DeleteProperty) \ |
107 V(DeoptCounter) \ | |
danno
2013/06/03 10:48:00
In addition to my general feedback to your approac
indutny
2013/06/03 10:56:12
Hm... you're right, but even this case I would nee
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108 V(DeoptCounterAdd) \ | |
107 V(Deoptimize) \ | 109 V(Deoptimize) \ |
108 V(Div) \ | 110 V(Div) \ |
109 V(DummyUse) \ | 111 V(DummyUse) \ |
110 V(ElementsKind) \ | 112 V(ElementsKind) \ |
111 V(EnterInlined) \ | 113 V(EnterInlined) \ |
112 V(FixedArrayBaseLength) \ | 114 V(FixedArrayBaseLength) \ |
113 V(ForceRepresentation) \ | 115 V(ForceRepresentation) \ |
114 V(FunctionLiteral) \ | 116 V(FunctionLiteral) \ |
115 V(GetCachedArrayIndex) \ | 117 V(GetCachedArrayIndex) \ |
116 V(GlobalObject) \ | 118 V(GlobalObject) \ |
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1511 protected: | 1513 protected: |
1512 virtual void InternalSetOperandAt(int index, HValue* value) { | 1514 virtual void InternalSetOperandAt(int index, HValue* value) { |
1513 values_[index] = value; | 1515 values_[index] = value; |
1514 } | 1516 } |
1515 | 1517 |
1516 private: | 1518 private: |
1517 ZoneList<HValue*> values_; | 1519 ZoneList<HValue*> values_; |
1518 }; | 1520 }; |
1519 | 1521 |
1520 | 1522 |
1523 // Deoptimization counter is a conditional deoptimization instruction, executing | |
1524 // only when HDeoptCounter's internal cell value is <= 0. | |
1525 // Value itself can be manipulated by using HDeoptCounterAdd instruction. | |
1526 class HDeoptCounter: public HTemplateInstruction<0> { | |
1527 public: | |
1528 HDeoptCounter(int id, int initial_value, int max_value) | |
1529 : id_(id), | |
1530 initial_value_(initial_value), | |
1531 max_value_(max_value) { | |
1532 ASSERT(initial_value_ <= max_value_); | |
1533 ASSERT(Smi::IsValid(initial_value_)); | |
1534 ASSERT(Smi::IsValid(max_value_)); | |
1535 } | |
1536 | |
1537 virtual Representation RequiredInputRepresentation(int index) { | |
1538 return Representation::None(); | |
1539 } | |
1540 | |
1541 virtual void PrintDataTo(StringStream* stream); | |
1542 | |
1543 inline int id() const { return id_; } | |
1544 inline int initial_value() const { return initial_value_; } | |
1545 inline int max_value() const { return max_value_; } | |
1546 | |
1547 DECLARE_CONCRETE_INSTRUCTION(DeoptCounter) | |
1548 | |
1549 private: | |
1550 int id_; | |
1551 int initial_value_; | |
1552 int max_value_; | |
1553 }; | |
1554 | |
1555 | |
1556 // Modify HDeoptCounter's cell's value by adding `delta` to it. | |
1557 // NOTE: May cause soft deoptimization on negative or zero cell's value. | |
1558 class HDeoptCounterAdd: public HTemplateInstruction<0> { | |
1559 public: | |
1560 explicit HDeoptCounterAdd(HDeoptCounter* counter, int delta) | |
1561 : counter_(counter), | |
1562 delta_(delta) { | |
1563 } | |
1564 | |
1565 virtual Representation RequiredInputRepresentation(int index) { | |
1566 return Representation::None(); | |
1567 } | |
1568 | |
1569 virtual void PrintDataTo(StringStream* stream); | |
1570 | |
1571 inline HDeoptCounter* counter() const { return counter_; } | |
1572 inline int delta() { return delta_; } | |
1573 | |
1574 DECLARE_CONCRETE_INSTRUCTION(DeoptCounterAdd) | |
1575 | |
1576 private: | |
1577 HDeoptCounter* counter_; | |
1578 int delta_; | |
1579 }; | |
1580 | |
1581 | |
1521 class HGoto: public HTemplateControlInstruction<1, 0> { | 1582 class HGoto: public HTemplateControlInstruction<1, 0> { |
1522 public: | 1583 public: |
1523 explicit HGoto(HBasicBlock* target) { | 1584 explicit HGoto(HBasicBlock* target) { |
1524 SetSuccessorAt(0, target); | 1585 SetSuccessorAt(0, target); |
1525 } | 1586 } |
1526 | 1587 |
1527 virtual Representation RequiredInputRepresentation(int index) { | 1588 virtual Representation RequiredInputRepresentation(int index) { |
1528 return Representation::None(); | 1589 return Representation::None(); |
1529 } | 1590 } |
1530 | 1591 |
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6500 virtual bool IsDeletable() const { return true; } | 6561 virtual bool IsDeletable() const { return true; } |
6501 }; | 6562 }; |
6502 | 6563 |
6503 | 6564 |
6504 #undef DECLARE_INSTRUCTION | 6565 #undef DECLARE_INSTRUCTION |
6505 #undef DECLARE_CONCRETE_INSTRUCTION | 6566 #undef DECLARE_CONCRETE_INSTRUCTION |
6506 | 6567 |
6507 } } // namespace v8::internal | 6568 } } // namespace v8::internal |
6508 | 6569 |
6509 #endif // V8_HYDROGEN_INSTRUCTIONS_H_ | 6570 #endif // V8_HYDROGEN_INSTRUCTIONS_H_ |
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