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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/select-lowering.h" | 5 #include "src/compiler/select-lowering.h" |
6 | 6 |
7 #include "src/compiler/common-operator.h" | 7 #include "src/compiler/common-operator.h" |
8 #include "src/compiler/diamond.h" | 8 #include "src/compiler/diamond.h" |
9 #include "src/compiler/generic-node-inl.h" | 9 #include "src/compiler/generic-node-inl.h" |
10 #include "src/compiler/graph.h" | 10 #include "src/compiler/graph.h" |
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25 Reduction SelectLowering::Reduce(Node* node) { | 25 Reduction SelectLowering::Reduce(Node* node) { |
26 if (node->opcode() != IrOpcode::kSelect) return NoChange(); | 26 if (node->opcode() != IrOpcode::kSelect) return NoChange(); |
27 SelectParameters const p = SelectParametersOf(node->op()); | 27 SelectParameters const p = SelectParametersOf(node->op()); |
28 | 28 |
29 Node* const cond = node->InputAt(0); | 29 Node* const cond = node->InputAt(0); |
30 | 30 |
31 // Check if we already have a diamond for this condition. | 31 // Check if we already have a diamond for this condition. |
32 auto i = merges_.find(cond); | 32 auto i = merges_.find(cond); |
33 if (i == merges_.end()) { | 33 if (i == merges_.end()) { |
34 // Create a new diamond for this condition and remember its merge node. | 34 // Create a new diamond for this condition and remember its merge node. |
35 Diamond d(graph(), common(), cond); | 35 Diamond d(graph(), common(), cond, p.hint()); |
36 i = merges_.insert(std::make_pair(cond, d.merge)).first; | 36 i = merges_.insert(std::make_pair(cond, d.merge)).first; |
37 } | 37 } |
38 | 38 |
39 DCHECK_EQ(cond, i->first); | 39 DCHECK_EQ(cond, i->first); |
40 | 40 |
41 // Create a Phi hanging off the previously determined merge. | 41 // Create a Phi hanging off the previously determined merge. |
42 node->set_op(common()->Phi(p.type(), 2)); | 42 node->set_op(common()->Phi(p.type(), 2)); |
43 node->ReplaceInput(0, node->InputAt(1)); | 43 node->ReplaceInput(0, node->InputAt(1)); |
44 node->ReplaceInput(1, node->InputAt(2)); | 44 node->ReplaceInput(1, node->InputAt(2)); |
45 node->ReplaceInput(2, i->second); | 45 node->ReplaceInput(2, i->second); |
46 return Changed(node); | 46 return Changed(node); |
47 } | 47 } |
48 | 48 |
49 } // namespace compiler | 49 } // namespace compiler |
50 } // namespace internal | 50 } // namespace internal |
51 } // namespace v8 | 51 } // namespace v8 |
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