5cefb367ce
This in turn allows usage of AdvancedReducer::ReplaceWithValue which has access to the underlying graph reducer. R=titzer@chromium.org Review URL: https://codereview.chromium.org/1158723005 Cr-Commit-Position: refs/heads/master@{#28817}
75 lines
2.6 KiB
C++
75 lines
2.6 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/access-builder.h"
|
|
#include "src/compiler/load-elimination.h"
|
|
#include "src/compiler/simplified-operator.h"
|
|
#include "test/unittests/compiler/graph-unittest.h"
|
|
#include "test/unittests/compiler/node-test-utils.h"
|
|
|
|
namespace v8 {
|
|
namespace internal {
|
|
namespace compiler {
|
|
|
|
class LoadEliminationTest : public GraphTest {
|
|
public:
|
|
LoadEliminationTest() : GraphTest(3), simplified_(zone()) {}
|
|
~LoadEliminationTest() override {}
|
|
|
|
protected:
|
|
Reduction Reduce(Node* node) {
|
|
// TODO(titzer): mock the GraphReducer here for better unit testing.
|
|
GraphReducer graph_reducer(zone(), graph());
|
|
LoadElimination reducer(&graph_reducer);
|
|
return reducer.Reduce(node);
|
|
}
|
|
|
|
SimplifiedOperatorBuilder* simplified() { return &simplified_; }
|
|
|
|
private:
|
|
SimplifiedOperatorBuilder simplified_;
|
|
};
|
|
|
|
|
|
TEST_F(LoadEliminationTest, LoadFieldWithStoreField) {
|
|
Node* object1 = Parameter(0);
|
|
Node* object2 = Parameter(1);
|
|
Node* value = Parameter(2);
|
|
Node* effect = graph()->start();
|
|
Node* control = graph()->start();
|
|
|
|
FieldAccess access1 = AccessBuilder::ForContextSlot(42);
|
|
Node* store1 = graph()->NewNode(simplified()->StoreField(access1), object1,
|
|
value, effect, control);
|
|
Reduction r1 = Reduce(graph()->NewNode(simplified()->LoadField(access1),
|
|
object1, store1, control));
|
|
ASSERT_TRUE(r1.Changed());
|
|
EXPECT_EQ(value, r1.replacement());
|
|
|
|
FieldAccess access2 = AccessBuilder::ForMap();
|
|
Node* store2 = graph()->NewNode(simplified()->StoreField(access2), object1,
|
|
object2, store1, control);
|
|
Reduction r2 = Reduce(graph()->NewNode(simplified()->LoadField(access2),
|
|
object1, store2, control));
|
|
ASSERT_TRUE(r2.Changed());
|
|
EXPECT_EQ(object2, r2.replacement());
|
|
|
|
Node* store3 = graph()->NewNode(
|
|
simplified()->StoreBuffer(BufferAccess(kExternalInt8Array)), object2,
|
|
value, Int32Constant(10), object1, store2, control);
|
|
|
|
Reduction r3 = Reduce(graph()->NewNode(simplified()->LoadField(access1),
|
|
object2, store3, control));
|
|
ASSERT_FALSE(r3.Changed());
|
|
|
|
Reduction r4 = Reduce(graph()->NewNode(simplified()->LoadField(access1),
|
|
object1, store3, control));
|
|
ASSERT_TRUE(r4.Changed());
|
|
EXPECT_EQ(value, r4.replacement());
|
|
}
|
|
|
|
} // namespace compiler
|
|
} // namespace internal
|
|
} // namespace v8
|