Implement LICM in optimizing compiler.
Change-Id: I9c8afb0a58ef45e568576015473cbfd5f011c242
diff --git a/test/445-checker-licm/src/Main.java b/test/445-checker-licm/src/Main.java
new file mode 100644
index 0000000..91ac2ed
--- /dev/null
+++ b/test/445-checker-licm/src/Main.java
@@ -0,0 +1,123 @@
+/*
+* Copyright (C) 2015 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 {
+
+ // CHECK-START: int Main.div() licm (before)
+ // CHECK-DAG: Div ( loop_header:{{B\d+}} )
+
+ // CHECK-START: int Main.div() licm (after)
+ // CHECK-NOT: Div ( loop_header:{{B\d+}} )
+
+ // CHECK-START: int Main.div() licm (after)
+ // CHECK-DAG: Div ( loop_header:null )
+
+ public static int div() {
+ int result = 0;
+ for (int i = 0; i < 10; ++i) {
+ result += staticField / 42;
+ }
+ return result;
+ }
+
+ // CHECK-START: int Main.innerDiv() licm (before)
+ // CHECK-DAG: Div ( loop_header:{{B\d+}} )
+
+ // CHECK-START: int Main.innerDiv() licm (after)
+ // CHECK-NOT: Div ( loop_header:{{B\d+}} )
+
+ // CHECK-START: int Main.innerDiv() licm (after)
+ // CHECK-DAG: Div ( loop_header:null )
+
+ public static int innerDiv() {
+ int result = 0;
+ for (int i = 0; i < 10; ++i) {
+ for (int j = 0; j < 10; ++j) {
+ result += staticField / 42;
+ }
+ }
+ return result;
+ }
+
+ // CHECK-START: int Main.innerDiv2() licm (before)
+ // CHECK-DAG: Mul ( loop_header:{{B4}} )
+
+ // CHECK-START: int Main.innerDiv2() licm (after)
+ // CHECK-DAG: Mul ( loop_header:{{B2}} )
+
+ public static int innerDiv2() {
+ int result = 0;
+ for (int i = 0; i < 10; ++i) {
+ for (int j = 0; j < 10; ++j) {
+ // The operation has been hoisted out of the inner loop.
+ // Note that we depend on the compiler's block numbering to
+ // check if it has been moved.
+ result += staticField * i;
+ }
+ }
+ return result;
+ }
+
+ // CHECK-START: int Main.innerDiv3(int, int) licm (before)
+ // CHECK-DAG: Div ( loop_header:{{B\d+}} )
+
+ // CHECK-START: int Main.innerDiv3(int, int) licm (after)
+ // CHECK-DAG: Div ( loop_header:{{B\d+}} )
+
+ public static int innerDiv3(int a, int b) {
+ int result = 0;
+ while (b < 5) {
+ // a might be null, so we can't hoist the operation.
+ result += staticField / a;
+ b++;
+ }
+ return result;
+ }
+
+ // CHECK-START: int Main.arrayLength(int[]) licm (before)
+ // CHECK-DAG: [[NullCheck:l\d+]] NullCheck ( loop_header:{{B\d+}} )
+ // CHECK-DAG: ArrayLength [ [[NullCheck]] ] ( loop_header:{{B\d+}} )
+
+ // CHECK-START: int Main.arrayLength(int[]) licm (after)
+ // CHECK-NOT: NullCheck ( loop_header:{{B\d+}} )
+ // CHECK-NOT: ArrayLength ( loop_header:{{B\d+}} )
+
+ // CHECK-START: int Main.arrayLength(int[]) licm (after)
+ // CHECK-DAG: [[NullCheck:l\d+]] NullCheck ( loop_header:null )
+ // CHECK-DAG: ArrayLength [ [[NullCheck]] ] ( loop_header:null )
+
+ public static int arrayLength(int[] array) {
+ int result = 0;
+ for (int i = 0; i < array.length; ++i) {
+ result += array[i];
+ }
+ return result;
+ }
+
+ public static int staticField = 42;
+
+ public static void assertEquals(int expected, int actual) {
+ if (expected != actual) {
+ throw new Error("Expected " + expected + ", got " + actual);
+ }
+ }
+
+ public static void main(String[] args) {
+ assertEquals(10, div());
+ assertEquals(100, innerDiv());
+ assertEquals(12, arrayLength(new int[] { 4, 8 }));
+ }
+}