Line data    Source code

       1             : // Copyright 2016 the V8 project authors. All rights reserved.
       2             : // Use of this source code is governed by a BSD-style license that can be
       3             : // found in the LICENSE file.
       4             : 
       5             : #include "src/compiler/checkpoint-elimination.h"
       6             : #include "src/compiler/common-operator.h"
       7             : #include "src/compiler/operator.h"
       8             : #include "test/unittests/compiler/graph-reducer-unittest.h"
       9             : #include "test/unittests/compiler/graph-unittest.h"
      10             : #include "test/unittests/compiler/node-test-utils.h"
      11             : 
      12             : using testing::StrictMock;
      13             : 
      14             : namespace v8 {
      15             : namespace internal {
      16             : namespace compiler {
      17             : 
      18             : class CheckpointEliminationTest : public GraphTest {
      19             :  public:
      20           1 :   CheckpointEliminationTest() : GraphTest() {}
      21           1 :   ~CheckpointEliminationTest() override = default;
      22             : 
      23             :  protected:
      24             :   Reduction Reduce(AdvancedReducer::Editor* editor, Node* node) {
      25           1 :     CheckpointElimination reducer(editor);
      26           1 :     return reducer.Reduce(node);
      27             :   }
      28             : 
      29           1 :   Reduction Reduce(Node* node) {
      30           1 :     StrictMock<MockAdvancedReducerEditor> editor;
      31           1 :     return Reduce(&editor, node);
      32             :   }
      33             : };
      34             : 
      35             : namespace {
      36             : 
      37        3037 : const Operator kOpNoWrite(0, Operator::kNoWrite, "OpNoWrite", 0, 1, 0, 0, 1, 0);
      38             : 
      39             : }  // namespace
      40             : 
      41             : // -----------------------------------------------------------------------------
      42             : // Checkpoint
      43             : 
      44       15189 : TEST_F(CheckpointEliminationTest, CheckpointChain) {
      45           1 :   Node* const control = graph()->start();
      46           1 :   Node* frame_state = EmptyFrameState();
      47             :   Node* checkpoint1 = graph()->NewNode(common()->Checkpoint(), frame_state,
      48           1 :                                        graph()->start(), control);
      49           1 :   Node* effect_link = graph()->NewNode(&kOpNoWrite, checkpoint1);
      50             :   Node* checkpoint2 = graph()->NewNode(common()->Checkpoint(), frame_state,
      51           1 :                                        effect_link, control);
      52           1 :   Reduction r = Reduce(checkpoint2);
      53           2 :   ASSERT_TRUE(r.Changed());
      54           2 :   EXPECT_EQ(effect_link, r.replacement());
      55             : }
      56             : 
      57             : }  // namespace compiler
      58             : }  // namespace internal
      59        9111 : }  // namespace v8