744c66bc29
Split lowering of Select nodes into a separate graph reducer and be more clever when lowering to diamonds, i.e. reuse diamonds that have the same condition and only add more phis to it. TEST=unittests R=dcarney@chromium.org Review URL: https://codereview.chromium.org/702463002 Cr-Commit-Position: refs/heads/master@{#25078} git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25078 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
63 lines
1.7 KiB
C++
63 lines
1.7 KiB
C++
// 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 "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 SelectLoweringTest : public GraphTest {
|
|
public:
|
|
SelectLoweringTest() : GraphTest(5), lowering_(graph(), common()) {}
|
|
|
|
protected:
|
|
Reduction Reduce(Node* node) { return lowering_.Reduce(node); }
|
|
|
|
private:
|
|
SelectLowering lowering_;
|
|
};
|
|
|
|
|
|
TEST_F(SelectLoweringTest, SelectWithSameConditions) {
|
|
Node* const p0 = Parameter(0);
|
|
Node* const p1 = Parameter(1);
|
|
Node* const p2 = Parameter(2);
|
|
Node* const p3 = Parameter(3);
|
|
Node* const p4 = Parameter(4);
|
|
|
|
Capture<Node*> branch;
|
|
Capture<Node*> merge;
|
|
{
|
|
Reduction const r =
|
|
Reduce(graph()->NewNode(common()->Select(kMachInt32), p0, p1, p2));
|
|
ASSERT_TRUE(r.Changed());
|
|
EXPECT_THAT(
|
|
r.replacement(),
|
|
IsPhi(
|
|
kMachInt32, p1, p2,
|
|
AllOf(CaptureEq(&merge),
|
|
IsMerge(IsIfTrue(CaptureEq(&branch)),
|
|
IsIfFalse(AllOf(CaptureEq(&branch),
|
|
IsBranch(p0, graph()->start())))))));
|
|
}
|
|
{
|
|
Reduction const r =
|
|
Reduce(graph()->NewNode(common()->Select(kMachInt32), p0, p3, p4));
|
|
ASSERT_TRUE(r.Changed());
|
|
EXPECT_THAT(r.replacement(), IsPhi(kMachInt32, p3, p4, CaptureEq(&merge)));
|
|
}
|
|
}
|
|
|
|
} // namespace compiler
|
|
} // namespace internal
|
|
} // namespace v8
|