1 files changed, 77 insertions, 0 deletions
diff --git a/compiler/optimizing/suspend_check_test.cc b/compiler/optimizing/suspend_check_test.cc
new file mode 100644
index 0000000000..65fc2d8e85
--- /dev/null
+++ b/compiler/optimizing/suspend_check_test.cc
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "builder.h"
+#include "dex_instruction.h"
+#include "nodes.h"
+#include "optimizing_unit_test.h"
+
+#include "gtest/gtest.h"
+
+namespace art {
+
+/**
+ * Check that the HGraphBuilder adds suspend checks to backward branches.
+ */
+
+static void TestCode(const uint16_t* data) {
+  ArenaPool pool;
+  ArenaAllocator allocator(&pool);
+  HGraphBuilder builder(&allocator);
+  const DexFile::CodeItem* item = reinterpret_cast<const DexFile::CodeItem*>(data);
+  HGraph* graph = builder.BuildGraph(*item);
+  ASSERT_NE(graph, nullptr);
+
+  HBasicBlock* first_block = graph->GetEntryBlock()->GetSuccessors().Get(0);
+  HInstruction* first_instruction = first_block->GetFirstInstruction();
+  // Account for some tests having a store local as first instruction.
+  ASSERT_TRUE(first_instruction->IsSuspendCheck()
+              || first_instruction->GetNext()->IsSuspendCheck());
+}
+
+TEST(CodegenTest, CFG1) {
+  const uint16_t data[] = ZERO_REGISTER_CODE_ITEM(
+    Instruction::NOP,
+    Instruction::GOTO | 0xFF00);
+
+  TestCode(data);
+}
+
+TEST(CodegenTest, CFG2) {
+  const uint16_t data[] = ZERO_REGISTER_CODE_ITEM(
+    Instruction::GOTO_32, 0, 0);
+
+  TestCode(data);
+}
+
+TEST(CodegenTest, CFG3) {
+  const uint16_t data[] = ONE_REGISTER_CODE_ITEM(
+    Instruction::CONST_4 | 0 | 0,
+    Instruction::IF_EQ, 0xFFFF,
+    Instruction::RETURN_VOID);
+
+  TestCode(data);
+}
+
+TEST(CodegenTest, CFG4) {
+  const uint16_t data[] = ONE_REGISTER_CODE_ITEM(
+    Instruction::CONST_4 | 0 | 0,
+    Instruction::IF_NE, 0xFFFF,
+    Instruction::RETURN_VOID);
+
+  TestCode(data);
+}
+}  // namespace art