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/*
* 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.
*/
package com.android.jack.optimizations.uselesscopy;
import com.android.jack.TestTools;
import com.android.jack.test.category.KnownBugs;
import com.android.jack.test.toolchain.AbstractTestTools;
import com.android.jack.test.toolchain.JackBasedToolchain;
import junit.framework.Assert;
import org.jf.dexlib.CodeItem;
import org.jf.dexlib.DexFile;
import org.jf.dexlib.Code.Instruction;
import org.jf.dexlib.Code.Opcode;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import java.io.File;
import javax.annotation.Nonnull;
public class UselessVariableCopyTest {
/**
* Verify that generated dex does not contains useless 'mov' instructions.
*/
@Test
@Category(KnownBugs.class)
public void test001() throws Exception {
File out = AbstractTestTools.createTempDir();
File outDex = new File(out, "classes.dex");
JackBasedToolchain toolchain = AbstractTestTools.getCandidateToolchain(JackBasedToolchain.class);
toolchain.disableDxOptimizations();
toolchain.srcToExe(
AbstractTestTools.getClasspathAsString(toolchain.getDefaultBootClasspath()),
out,
/* zipFile = */ false,
AbstractTestTools.getTestRootDir("com.android.jack.optimizations.uselesscopy.test001.jack"));
DexFile dexFile = new DexFile(outDex);
CodeItem ci =
TestTools.getEncodedMethod(dexFile,
"Lcom/android/jack/optimizations/uselesscopy/test001/jack/Test001;", "test",
"(Ljava/lang/Object;)Z").codeItem;
Assert.assertFalse(hasOpcode(ci, Opcode.MOVE_OBJECT));
}
private boolean hasOpcode(@Nonnull CodeItem codeItem, @Nonnull Opcode opcode) {
for (Instruction inst : codeItem.getInstructions()) {
if (inst.opcode == opcode) {
return true;
}
}
return false;
}
}
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