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/select-lowering.h" 6 7 #include "src/compiler/common-operator.h" 8 #include "src/compiler/diamond.h" 9 #include "src/compiler/graph.h" 10 #include "src/compiler/node.h" 11 #include "src/compiler/node-properties.h" 12 13 namespace v8 { 14 namespace internal { 15 namespace compiler { 16 17 SelectLowering::SelectLowering(Graph* graph, CommonOperatorBuilder* common) 18 : common_(common), graph_(graph) {} 19 20 SelectLowering::~SelectLowering() {} 21 22 23 Reduction SelectLowering::Reduce(Node* node) { 24 if (node->opcode() != IrOpcode::kSelect) return NoChange(); 25 SelectParameters const p = SelectParametersOf(node->op()); 26 27 Node* cond = node->InputAt(0); 28 Node* vthen = node->InputAt(1); 29 Node* velse = node->InputAt(2); 30 31 // Create a diamond and a phi. 32 Diamond d(graph(), common(), cond, p.hint()); 33 node->ReplaceInput(0, vthen); 34 node->ReplaceInput(1, velse); 35 node->ReplaceInput(2, d.merge); 36 NodeProperties::ChangeOp(node, common()->Phi(p.representation(), 2)); 37 return Changed(node); 38 } 39 40 } // namespace compiler 41 } // namespace internal 42 } // namespace v8 43
