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| 1 // Copyright 2014 the V8 project authors. All rights reserved. | 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 | 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/common-operator-reducer.h" | 5 #include "src/compiler/common-operator-reducer.h" |
| 6 | 6 |
| 7 #include <algorithm> | 7 #include <algorithm> |
| 8 | 8 |
| 9 #include "src/compiler/common-operator.h" | 9 #include "src/compiler/common-operator.h" |
| 10 #include "src/compiler/graph.h" | 10 #include "src/compiler/graph.h" |
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| 119 UNREACHABLE(); | 119 UNREACHABLE(); |
| 120 } | 120 } |
| 121 } | 121 } |
| 122 return Replace(dead()); | 122 return Replace(dead()); |
| 123 } | 123 } |
| 124 | 124 |
| 125 Reduction CommonOperatorReducer::ReduceDeoptimizeConditional(Node* node) { | 125 Reduction CommonOperatorReducer::ReduceDeoptimizeConditional(Node* node) { |
| 126 DCHECK(node->opcode() == IrOpcode::kDeoptimizeIf || | 126 DCHECK(node->opcode() == IrOpcode::kDeoptimizeIf || |
| 127 node->opcode() == IrOpcode::kDeoptimizeUnless); | 127 node->opcode() == IrOpcode::kDeoptimizeUnless); |
| 128 bool condition_is_true = node->opcode() == IrOpcode::kDeoptimizeUnless; | 128 bool condition_is_true = node->opcode() == IrOpcode::kDeoptimizeUnless; |
| 129 DeoptimizeParameters p = DeoptimizeParametersOf(node->op()); | 129 DeoptimizeReason reason = DeoptimizeReasonOf(node->op()); |
| 130 Node* condition = NodeProperties::GetValueInput(node, 0); | 130 Node* condition = NodeProperties::GetValueInput(node, 0); |
| 131 Node* frame_state = NodeProperties::GetValueInput(node, 1); | 131 Node* frame_state = NodeProperties::GetValueInput(node, 1); |
| 132 Node* effect = NodeProperties::GetEffectInput(node); | 132 Node* effect = NodeProperties::GetEffectInput(node); |
| 133 Node* control = NodeProperties::GetControlInput(node); | 133 Node* control = NodeProperties::GetControlInput(node); |
| 134 // Swap DeoptimizeIf/DeoptimizeUnless on {node} if {cond} is a BooleaNot | 134 // Swap DeoptimizeIf/DeoptimizeUnless on {node} if {cond} is a BooleaNot |
| 135 // and use the input to BooleanNot as new condition for {node}. Note we | 135 // and use the input to BooleanNot as new condition for {node}. Note we |
| 136 // assume that {cond} was already properly optimized before we get here | 136 // assume that {cond} was already properly optimized before we get here |
| 137 // (as guaranteed by the graph reduction logic). | 137 // (as guaranteed by the graph reduction logic). |
| 138 if (condition->opcode() == IrOpcode::kBooleanNot) { | 138 if (condition->opcode() == IrOpcode::kBooleanNot) { |
| 139 NodeProperties::ReplaceValueInput(node, condition->InputAt(0), 0); | 139 NodeProperties::ReplaceValueInput(node, condition->InputAt(0), 0); |
| 140 NodeProperties::ChangeOp( | 140 NodeProperties::ChangeOp(node, condition_is_true |
| 141 node, condition_is_true | 141 ? common()->DeoptimizeIf(reason) |
| 142 ? common()->DeoptimizeIf(p.kind(), p.reason()) | 142 : common()->DeoptimizeUnless(reason)); |
| 143 : common()->DeoptimizeUnless(p.kind(), p.reason())); | |
| 144 return Changed(node); | 143 return Changed(node); |
| 145 } | 144 } |
| 146 Decision const decision = DecideCondition(condition); | 145 Decision const decision = DecideCondition(condition); |
| 147 if (decision == Decision::kUnknown) return NoChange(); | 146 if (decision == Decision::kUnknown) return NoChange(); |
| 148 if (condition_is_true == (decision == Decision::kTrue)) { | 147 if (condition_is_true == (decision == Decision::kTrue)) { |
| 149 ReplaceWithValue(node, dead(), effect, control); | 148 ReplaceWithValue(node, dead(), effect, control); |
| 150 } else { | 149 } else { |
| 151 control = graph()->NewNode(common()->Deoptimize(p.kind(), p.reason()), | 150 control = |
| 152 frame_state, effect, control); | 151 graph()->NewNode(common()->Deoptimize(DeoptimizeKind::kEager, reason), |
| 152 frame_state, effect, control); |
| 153 // TODO(bmeurer): This should be on the AdvancedReducer somehow. | 153 // TODO(bmeurer): This should be on the AdvancedReducer somehow. |
| 154 NodeProperties::MergeControlToEnd(graph(), common(), control); | 154 NodeProperties::MergeControlToEnd(graph(), common(), control); |
| 155 Revisit(graph()->end()); | 155 Revisit(graph()->end()); |
| 156 } | 156 } |
| 157 return Replace(dead()); | 157 return Replace(dead()); |
| 158 } | 158 } |
| 159 | 159 |
| 160 Reduction CommonOperatorReducer::ReduceMerge(Node* node) { | 160 Reduction CommonOperatorReducer::ReduceMerge(Node* node) { |
| 161 DCHECK_EQ(IrOpcode::kMerge, node->opcode()); | 161 DCHECK_EQ(IrOpcode::kMerge, node->opcode()); |
| 162 // | 162 // |
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| 427 node->ReplaceInput(0, a); | 427 node->ReplaceInput(0, a); |
| 428 node->ReplaceInput(1, b); | 428 node->ReplaceInput(1, b); |
| 429 node->TrimInputCount(2); | 429 node->TrimInputCount(2); |
| 430 NodeProperties::ChangeOp(node, op); | 430 NodeProperties::ChangeOp(node, op); |
| 431 return Changed(node); | 431 return Changed(node); |
| 432 } | 432 } |
| 433 | 433 |
| 434 } // namespace compiler | 434 } // namespace compiler |
| 435 } // namespace internal | 435 } // namespace internal |
| 436 } // namespace v8 | 436 } // namespace v8 |
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