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// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/compiler/select-lowering.h"
#include "src/compiler/common-operator.h"
#include "src/compiler/diamond.h"
#include "src/compiler/graph-assembler.h"
#include "src/compiler/graph.h"
#include "src/compiler/node-properties.h"
#include "src/compiler/node.h"
namespace v8 {
namespace internal {
namespace compiler {
SelectLowering::SelectLowering(JSGraphAssembler* graph_assembler, Graph* graph)
: graph_assembler_(graph_assembler), start_(graph->start()) {}
SelectLowering::~SelectLowering() = default;
Reduction SelectLowering::Reduce(Node* node) {
if (node->opcode() != IrOpcode::kSelect) return NoChange();
return LowerSelect(node);
}
#define __ gasm()->
Reduction SelectLowering::LowerSelect(Node* node) {
SelectParameters const p = SelectParametersOf(node->op());
Node* condition = node->InputAt(0);
Node* vtrue = node->InputAt(1);
Node* vfalse = node->InputAt(2);
bool reset_gasm = false;
if (gasm()->control() == nullptr) {
gasm()->InitializeEffectControl(start(), start());
reset_gasm = true;
}
auto done = __ MakeLabel(p.representation());
__ GotoIf(condition, &done, vtrue);
__ Goto(&done, vfalse);
__ Bind(&done);
if (reset_gasm) {
gasm()->Reset(nullptr);
}
return Changed(done.PhiAt(0));
}
#undef __
} // namespace compiler
} // namespace internal
} // namespace v8
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