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// Copyright 2015 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/control-flow-optimizer.h"
#include "src/compiler/js-graph.h"
#include "src/compiler/js-operator.h"
#include "src/compiler/machine-operator.h"
#include "test/unittests/compiler/graph-unittest.h"
#include "test/unittests/compiler/node-test-utils.h"
#include "testing/gmock-support.h"
using testing::AllOf;
using testing::Capture;
using testing::CaptureEq;
namespace v8 {
namespace internal {
namespace compiler {
class ControlFlowOptimizerTest : public GraphTest {
public:
explicit ControlFlowOptimizerTest(int num_parameters = 3)
: GraphTest(num_parameters), machine_(zone()) {}
~ControlFlowOptimizerTest() OVERRIDE {}
protected:
void Optimize() {
JSOperatorBuilder javascript(zone());
JSGraph jsgraph(isolate(), graph(), common(), &javascript, machine());
ControlFlowOptimizer optimizer(&jsgraph, zone());
optimizer.Optimize();
}
MachineOperatorBuilder* machine() { return &machine_; }
private:
MachineOperatorBuilder machine_;
};
TEST_F(ControlFlowOptimizerTest, Switch) {
Node* index = Parameter(0);
Node* branch0 = graph()->NewNode(
common()->Branch(),
graph()->NewNode(machine()->Word32Equal(), index, Int32Constant(0)),
start());
Node* if_true0 = graph()->NewNode(common()->IfTrue(), branch0);
Node* if_false0 = graph()->NewNode(common()->IfFalse(), branch0);
Node* branch1 = graph()->NewNode(
common()->Branch(),
graph()->NewNode(machine()->Word32Equal(), index, Int32Constant(1)),
if_false0);
Node* if_true1 = graph()->NewNode(common()->IfTrue(), branch1);
Node* if_false1 = graph()->NewNode(common()->IfFalse(), branch1);
Node* merge =
graph()->NewNode(common()->Merge(3), if_true0, if_true1, if_false1);
graph()->SetEnd(graph()->NewNode(common()->End(), merge));
Optimize();
Capture<Node*> switch_capture;
EXPECT_THAT(end(),
IsEnd(IsMerge(IsIfValue(0, CaptureEq(&switch_capture)),
IsIfValue(1, CaptureEq(&switch_capture)),
IsIfDefault(AllOf(CaptureEq(&switch_capture),
IsSwitch(index, start()))))));
}
} // namespace compiler
} // namespace internal
} // namespace v8
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