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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/common-operator-reducer.h"
#include "src/compiler/common-operator.h"
#include "src/compiler/node.h"
namespace v8 {
namespace internal {
namespace compiler {
Reduction CommonOperatorReducer::Reduce(Node* node) {
switch (node->opcode()) {
case IrOpcode::kEffectPhi:
case IrOpcode::kPhi: {
int const input_count = node->InputCount();
if (input_count > 1) {
Node* const replacement = node->InputAt(0);
for (int i = 1; i < input_count - 1; ++i) {
if (node->InputAt(i) != replacement) return NoChange();
}
return Replace(replacement);
}
break;
}
case IrOpcode::kSelect: {
if (node->InputAt(1) == node->InputAt(2)) {
return Replace(node->InputAt(1));
}
break;
}
default:
break;
}
return NoChange();
}
} // namespace compiler
} // namespace internal
} // namespace v8
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