Opt compiler: enhance gvn for commutative ops.

Change-Id: I415b50d58b30cab4ec38077be22373eb9598ec40

3 files changed, 43 insertions, 0 deletions

diff --git a/test/455-checker-gvn/expected.txt b/test/455-checker-gvn/expected.txt
new file mode 100644
index 0000000..8351c19
--- /dev/null
+++ b/test/455-checker-gvn/expected.txt
@@ -0,0 +1 @@
+14
diff --git a/test/455-checker-gvn/info.txt b/test/455-checker-gvn/info.txt
new file mode 100644
index 0000000..dfffd92
--- /dev/null
+++ b/test/455-checker-gvn/info.txt
@@ -0,0 +1 @@
+Checker test for GVN.
diff --git a/test/455-checker-gvn/src/Main.java b/test/455-checker-gvn/src/Main.java
new file mode 100644
index 0000000..e94fc46
--- /dev/null
+++ b/test/455-checker-gvn/src/Main.java
@@ -0,0 +1,41 @@
+/*
+ * 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.
+ */
+
+public class Main {
+  public static void main(String[] args) {
+    System.out.println(foo(3, 4));
+  }
+
+  // CHECK-START: int Main.foo(int, int) GVN (before)
+  // CHECK: Add
+  // CHECK: Add
+  // CHECK: Add
+
+  // CHECK-START: int Main.foo(int, int) GVN (after)
+  // CHECK: Add
+  // CHECK: Add
+  // CHECK-NOT: Add
+
+  public static int foo(int x, int y) {
+    int sum1 = x + y;
+    int sum2 = y + x;
+    return sum1 + sum2;
+  }
+
+  public static long bar(int i) {
+    return i;
+  }
+}