Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 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" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 11 | #include "src/compiler/node-properties.h" |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 12 | |
| 13 | namespace v8 { |
| 14 | namespace internal { |
| 15 | namespace compiler { |
| 16 | |
| 17 | SelectLowering::SelectLowering(Graph* graph, CommonOperatorBuilder* common) |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 18 | : common_(common), graph_(graph) {} |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 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); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 30 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 31 | // Create a diamond and a phi. |
| 32 | Diamond d(graph(), common(), cond, p.hint()); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 33 | node->ReplaceInput(0, vthen); |
| 34 | node->ReplaceInput(1, velse); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 35 | node->ReplaceInput(2, d.merge); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 36 | NodeProperties::ChangeOp(node, common()->Phi(p.representation(), 2)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 37 | return Changed(node); |
| 38 | } |
| 39 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 40 | } // namespace compiler |
| 41 | } // namespace internal |
| 42 | } // namespace v8 |