| // Copyright (c) 2017, 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.cf.code; |
| |
| import com.android.tools.r8.cf.CfPrinter; |
| import com.android.tools.r8.errors.Unreachable; |
| import com.android.tools.r8.graph.AppView; |
| import com.android.tools.r8.graph.DexType; |
| import com.android.tools.r8.graph.GraphLense; |
| import com.android.tools.r8.ir.code.ValueType; |
| import com.android.tools.r8.ir.conversion.CfSourceCode; |
| import com.android.tools.r8.ir.conversion.CfState; |
| import com.android.tools.r8.ir.conversion.IRBuilder; |
| import com.android.tools.r8.ir.optimize.Inliner.ConstraintWithTarget; |
| import com.android.tools.r8.ir.optimize.InliningConstraints; |
| import com.android.tools.r8.naming.NamingLens; |
| import org.objectweb.asm.MethodVisitor; |
| import org.objectweb.asm.Opcodes; |
| |
| public class CfConstNumber extends CfInstruction { |
| |
| private final long value; |
| private final ValueType type; |
| |
| public CfConstNumber(long value, ValueType type) { |
| this.value = value; |
| this.type = type; |
| } |
| |
| public ValueType getType() { |
| return type; |
| } |
| |
| public long getRawValue() { |
| return value; |
| } |
| |
| public int getIntValue() { |
| assert type == ValueType.INT; |
| return (int) value; |
| } |
| |
| public long getLongValue() { |
| assert type == ValueType.LONG; |
| return value; |
| } |
| |
| public float getFloatValue() { |
| assert type == ValueType.FLOAT; |
| return Float.intBitsToFloat((int) value); |
| } |
| |
| public double getDoubleValue() { |
| assert type == ValueType.DOUBLE; |
| return Double.longBitsToDouble(value); |
| } |
| |
| @Override |
| public void write(MethodVisitor visitor, NamingLens lens) { |
| switch (type) { |
| case INT: |
| { |
| int value = getIntValue(); |
| if (-1 <= value && value <= 5) { |
| visitor.visitInsn(Opcodes.ICONST_0 + value); |
| } else if (Byte.MIN_VALUE <= value && value <= Byte.MAX_VALUE) { |
| visitor.visitIntInsn(Opcodes.BIPUSH, value); |
| } else if (Short.MIN_VALUE <= value && value <= Short.MAX_VALUE) { |
| visitor.visitIntInsn(Opcodes.SIPUSH, value); |
| } else { |
| visitor.visitLdcInsn(value); |
| } |
| break; |
| } |
| case LONG: |
| { |
| long value = getLongValue(); |
| if (value == 0 || value == 1) { |
| visitor.visitInsn(Opcodes.LCONST_0 + (int) value); |
| } else { |
| visitor.visitLdcInsn(value); |
| } |
| break; |
| } |
| case FLOAT: |
| { |
| float value = getFloatValue(); |
| if (value == 0 || value == 1 || value == 2) { |
| visitor.visitInsn(Opcodes.FCONST_0 + (int) value); |
| if (isNegativeZeroFloat(value)) { |
| visitor.visitInsn(Opcodes.FNEG); |
| } |
| } else { |
| visitor.visitLdcInsn(value); |
| } |
| break; |
| } |
| case DOUBLE: |
| { |
| double value = getDoubleValue(); |
| if (value == 0 || value == 1) { |
| visitor.visitInsn(Opcodes.DCONST_0 + (int) value); |
| if (isNegativeZeroDouble(value)) { |
| visitor.visitInsn(Opcodes.DNEG); |
| } |
| } else { |
| visitor.visitLdcInsn(value); |
| } |
| break; |
| } |
| default: |
| throw new Unreachable("Non supported type in cf backend: " + type); |
| } |
| } |
| |
| public static boolean isNegativeZeroDouble(double value) { |
| return Double.doubleToLongBits(value) == Double.doubleToLongBits(-0.0); |
| } |
| |
| public static boolean isNegativeZeroFloat(float value) { |
| return Float.floatToIntBits(value) == Float.floatToIntBits(-0.0f); |
| } |
| |
| @Override |
| public void print(CfPrinter printer) { |
| printer.print(this); |
| } |
| |
| @Override |
| public void buildIR(IRBuilder builder, CfState state, CfSourceCode code) { |
| builder.addConst(type.toPrimitiveTypeLattice(), state.push(type).register, value); |
| } |
| |
| @Override |
| public ConstraintWithTarget inliningConstraint( |
| InliningConstraints inliningConstraints, |
| DexType invocationContext, |
| GraphLense graphLense, |
| AppView<?> appView) { |
| return inliningConstraints.forConstInstruction(); |
| } |
| } |