Merge V8 5.3.332.45. DO NOT MERGE
Test: Manual
FPIIM-449
Change-Id: Id3254828b068abdea3cb10442e0172a8c9a98e03
(cherry picked from commit 13e2dadd00298019ed862f2b2fc5068bba730bcf)
diff --git a/test/unittests/compiler/checkpoint-elimination-unittest.cc b/test/unittests/compiler/checkpoint-elimination-unittest.cc
new file mode 100644
index 0000000..a201fc9
--- /dev/null
+++ b/test/unittests/compiler/checkpoint-elimination-unittest.cc
@@ -0,0 +1,59 @@
+// Copyright 2016 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/checkpoint-elimination.h"
+#include "src/compiler/common-operator.h"
+#include "src/compiler/operator.h"
+#include "test/unittests/compiler/graph-reducer-unittest.h"
+#include "test/unittests/compiler/graph-unittest.h"
+#include "test/unittests/compiler/node-test-utils.h"
+
+using testing::StrictMock;
+
+namespace v8 {
+namespace internal {
+namespace compiler {
+
+class CheckpointEliminationTest : public GraphTest {
+ public:
+ CheckpointEliminationTest() : GraphTest() {}
+ ~CheckpointEliminationTest() override {}
+
+ protected:
+ Reduction Reduce(AdvancedReducer::Editor* editor, Node* node) {
+ CheckpointElimination reducer(editor);
+ return reducer.Reduce(node);
+ }
+
+ Reduction Reduce(Node* node) {
+ StrictMock<MockAdvancedReducerEditor> editor;
+ return Reduce(&editor, node);
+ }
+};
+
+namespace {
+
+const Operator kOpNoWrite(0, Operator::kNoWrite, "OpNoWrite", 0, 1, 0, 0, 1, 0);
+
+} // namespace
+
+// -----------------------------------------------------------------------------
+// Checkpoint
+
+TEST_F(CheckpointEliminationTest, CheckpointChain) {
+ Node* const control = graph()->start();
+ Node* frame_state = EmptyFrameState();
+ Node* checkpoint1 = graph()->NewNode(common()->Checkpoint(), frame_state,
+ graph()->start(), control);
+ Node* effect_link = graph()->NewNode(&kOpNoWrite, checkpoint1);
+ Node* checkpoint2 = graph()->NewNode(common()->Checkpoint(), frame_state,
+ effect_link, control);
+ Reduction r = Reduce(checkpoint2);
+ ASSERT_TRUE(r.Changed());
+ EXPECT_EQ(effect_link, r.replacement());
+}
+
+} // namespace compiler
+} // namespace internal
+} // namespace v8