blob: 8e85bd01be27a1d72e989baa99a948af01d181af [file] [log] [blame]
// Copyright (c) 2020, the R8 project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
package com.android.tools.r8.code;
import com.android.tools.r8.dex.IndexedItemCollection;
import com.android.tools.r8.errors.Unreachable;
import com.android.tools.r8.graph.DexField;
import com.android.tools.r8.graph.DexType;
import com.android.tools.r8.graph.GraphLens;
import com.android.tools.r8.graph.ObjectToOffsetMapping;
import com.android.tools.r8.graph.ProgramMethod;
import com.android.tools.r8.graph.UseRegistry;
import com.android.tools.r8.ir.code.FieldMemberType;
import com.android.tools.r8.ir.conversion.IRBuilder;
import com.android.tools.r8.ir.conversion.LensCodeRewriterUtils;
import com.android.tools.r8.naming.ClassNameMapper;
import com.android.tools.r8.utils.structural.CompareToVisitor;
import com.android.tools.r8.utils.structural.StructuralSpecification;
import java.nio.ShortBuffer;
public class DexInitClass extends Base2Format {
public static final int OPCODE = 0x60;
public static final String NAME = "InitClass";
public static final String SMALI_NAME = "initclass";
private final int dest;
private final DexType clazz;
private static void specify(StructuralSpecification<DexInitClass, ?> spec) {
spec.withInt(i -> i.dest).withItem(i -> i.clazz);
}
public DexInitClass(int dest, DexType clazz) {
assert clazz.isClassType();
this.dest = dest;
this.clazz = clazz;
}
@Override
public void buildIR(IRBuilder builder) {
builder.addInitClass(dest, clazz);
}
@Override
public void collectIndexedItems(
IndexedItemCollection indexedItems,
ProgramMethod context,
GraphLens graphLens,
LensCodeRewriterUtils rewriter) {
// We intentionally apply the graph lens first, and then the init class lens, using the fact
// that the init class lens maps classes in the final program to fields in the final program.
DexType rewrittenClass = graphLens.lookupType(clazz);
DexField clinitField = indexedItems.getInitClassLens().getInitClassField(rewrittenClass);
clinitField.collectIndexedItems(indexedItems);
}
@Override
public boolean canThrow() {
return true;
}
@Override
public String getName() {
return NAME;
}
@Override
public String getSmaliName() {
return SMALI_NAME;
}
@Override
public int getOpcode() {
throw new Unreachable();
}
@Override
int getCompareToId() {
return DexCompareHelper.INIT_CLASS_COMPARE_ID;
}
private int getOpcode(DexField field) {
FieldMemberType type = FieldMemberType.fromDexType(field.type);
switch (type) {
case INT:
case FLOAT:
return Sget.OPCODE;
case LONG:
case DOUBLE:
return SgetWide.OPCODE;
case OBJECT:
return SgetObject.OPCODE;
case BOOLEAN:
return SgetBoolean.OPCODE;
case BYTE:
return SgetByte.OPCODE;
case CHAR:
return SgetChar.OPCODE;
case SHORT:
return SgetShort.OPCODE;
default:
throw new Unreachable("Unexpected type: " + type);
}
}
@Override
public void registerUse(UseRegistry registry) {
registry.registerInitClass(clazz);
}
@Override
public void write(
ShortBuffer buffer,
ProgramMethod context,
GraphLens graphLens,
ObjectToOffsetMapping mapping,
LensCodeRewriterUtils rewriter) {
// We intentionally apply the graph lens first, and then the init class lens, using the fact
// that the init class lens maps classes in the final program to fields in the final program.
DexType rewrittenClass = graphLens.lookupType(clazz);
DexField clinitField = mapping.getClinitField(rewrittenClass);
writeFirst(dest, buffer, getOpcode(clinitField));
write16BitReference(clinitField, buffer, mapping);
}
@Override
public int hashCode() {
return ((clazz.hashCode() << 8) | dest) ^ getClass().hashCode();
}
@Override
final int internalAcceptCompareTo(Instruction other, CompareToVisitor visitor) {
return visitor.visit(this, (DexInitClass) other, DexInitClass::specify);
}
@Override
public String toSmaliString(ClassNameMapper naming) {
return formatSmaliString("v" + dest + ", " + clazz.toSmaliString());
}
@Override
public String toString(ClassNameMapper naming) {
StringBuilder builder = new StringBuilder("v").append(dest).append(", ");
if (naming == null) {
builder.append(clazz.toSourceString());
} else {
builder.append(naming.originalNameOf(clazz));
}
return formatString(builder.toString());
}
}