blob: 91ac2edbdcaa549d26803212ec46f08ab94bf6cb [file] [log] [blame]
/*
* 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 }));
}
}