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| 1 // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "src/compiler/simplified-operator-reducer.h" |
| 6 |
| 7 #include "src/compiler/js-graph.h" |
| 8 #include "src/compiler/machine-operator.h" |
| 9 #include "src/compiler/node-matchers.h" |
| 10 #include "src/compiler/operator-properties.h" |
| 11 |
| 12 namespace v8 { |
| 13 namespace internal { |
| 14 namespace compiler { |
| 15 |
| 16 SimplifiedOperatorReducer::SimplifiedOperatorReducer(JSGraph* jsgraph) |
| 17 : jsgraph_(jsgraph), simplified_(jsgraph->zone()) {} |
| 18 |
| 19 |
| 20 SimplifiedOperatorReducer::~SimplifiedOperatorReducer() {} |
| 21 |
| 22 |
| 23 Reduction SimplifiedOperatorReducer::Reduce(Node* node) { |
| 24 switch (node->opcode()) { |
| 25 case IrOpcode::kBooleanNot: { |
| 26 HeapObjectMatcher m(node->InputAt(0)); |
| 27 if (m.HasValue()) { |
| 28 return Replace( |
| 29 jsgraph()->BooleanConstant(!m.Value().handle()->BooleanValue())); |
| 30 } |
| 31 if (m.IsBooleanNot()) return Replace(m.InputAt(0)); |
| 32 break; |
| 33 } |
| 34 case IrOpcode::kChangeBitToBool: { |
| 35 Int32Matcher m(node->InputAt(0)); |
| 36 if (m.Is(0)) return Replace(jsgraph()->FalseConstant()); |
| 37 if (m.Is(1)) return Replace(jsgraph()->TrueConstant()); |
| 38 if (m.IsChangeBoolToBit()) return Replace(m.InputAt(0)); |
| 39 break; |
| 40 } |
| 41 case IrOpcode::kChangeBoolToBit: { |
| 42 HeapObjectMatcher m(node->InputAt(0)); |
| 43 if (m.HasValue()) return ReplaceInt32(m.Value().handle()->BooleanValue()); |
| 44 if (m.IsChangeBitToBool()) return Replace(m.InputAt(0)); |
| 45 break; |
| 46 } |
| 47 case IrOpcode::kChangeFloat64ToTagged: { |
| 48 Float64Matcher m(node->InputAt(0)); |
| 49 if (m.HasValue()) return ReplaceNumber(m.Value()); |
| 50 break; |
| 51 } |
| 52 case IrOpcode::kChangeInt32ToTagged: { |
| 53 Int32Matcher m(node->InputAt(0)); |
| 54 if (m.HasValue()) return ReplaceNumber(m.Value()); |
| 55 break; |
| 56 } |
| 57 case IrOpcode::kChangeTaggedToFloat64: { |
| 58 NumberMatcher m(node->InputAt(0)); |
| 59 if (m.HasValue()) return ReplaceFloat64(m.Value()); |
| 60 if (m.IsChangeFloat64ToTagged()) return Replace(m.node()->InputAt(0)); |
| 61 if (m.IsChangeInt32ToTagged()) { |
| 62 return Change(node, machine()->ChangeInt32ToFloat64(), m.InputAt(0)); |
| 63 } |
| 64 if (m.IsChangeUint32ToTagged()) { |
| 65 return Change(node, machine()->ChangeUint32ToFloat64(), m.InputAt(0)); |
| 66 } |
| 67 break; |
| 68 } |
| 69 case IrOpcode::kChangeTaggedToInt32: { |
| 70 NumberMatcher m(node->InputAt(0)); |
| 71 if (m.HasValue()) return ReplaceInt32(DoubleToInt32(m.Value())); |
| 72 if (m.IsChangeFloat64ToTagged()) { |
| 73 return Change(node, machine()->ChangeFloat64ToInt32(), m.InputAt(0)); |
| 74 } |
| 75 if (m.IsChangeInt32ToTagged()) return Replace(m.InputAt(0)); |
| 76 break; |
| 77 } |
| 78 case IrOpcode::kChangeTaggedToUint32: { |
| 79 NumberMatcher m(node->InputAt(0)); |
| 80 if (m.HasValue()) return ReplaceUint32(DoubleToUint32(m.Value())); |
| 81 if (m.IsChangeFloat64ToTagged()) { |
| 82 return Change(node, machine()->ChangeFloat64ToUint32(), m.InputAt(0)); |
| 83 } |
| 84 if (m.IsChangeUint32ToTagged()) return Replace(m.InputAt(0)); |
| 85 break; |
| 86 } |
| 87 case IrOpcode::kChangeUint32ToTagged: { |
| 88 Uint32Matcher m(node->InputAt(0)); |
| 89 if (m.HasValue()) return ReplaceNumber(FastUI2D(m.Value())); |
| 90 break; |
| 91 } |
| 92 default: |
| 93 break; |
| 94 } |
| 95 return NoChange(); |
| 96 } |
| 97 |
| 98 |
| 99 Reduction SimplifiedOperatorReducer::Change(Node* node, const Operator* op, |
| 100 Node* a) { |
| 101 DCHECK_EQ(node->InputCount(), OperatorProperties::GetTotalInputCount(op)); |
| 102 DCHECK_LE(1, node->InputCount()); |
| 103 node->set_op(op); |
| 104 node->ReplaceInput(0, a); |
| 105 return Changed(node); |
| 106 } |
| 107 |
| 108 |
| 109 Reduction SimplifiedOperatorReducer::ReplaceFloat64(double value) { |
| 110 return Replace(jsgraph()->Float64Constant(value)); |
| 111 } |
| 112 |
| 113 |
| 114 Reduction SimplifiedOperatorReducer::ReplaceInt32(int32_t value) { |
| 115 return Replace(jsgraph()->Int32Constant(value)); |
| 116 } |
| 117 |
| 118 |
| 119 Reduction SimplifiedOperatorReducer::ReplaceNumber(double value) { |
| 120 return Replace(jsgraph()->Constant(value)); |
| 121 } |
| 122 |
| 123 |
| 124 Reduction SimplifiedOperatorReducer::ReplaceNumber(int32_t value) { |
| 125 return Replace(jsgraph()->Constant(value)); |
| 126 } |
| 127 |
| 128 |
| 129 Graph* SimplifiedOperatorReducer::graph() const { return jsgraph()->graph(); } |
| 130 |
| 131 |
| 132 MachineOperatorBuilder* SimplifiedOperatorReducer::machine() const { |
| 133 return jsgraph()->machine(); |
| 134 } |
| 135 |
| 136 } // namespace compiler |
| 137 } // namespace internal |
| 138 } // namespace v8 |
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