proguard.optimize.peephole
Class InstructionSequenceReplacer

java.lang.Object
  proguard.classfile.util.SimplifiedVisitor
      proguard.optimize.peephole.InstructionSequenceReplacer

All Implemented Interfaces:

ConstantVisitor, InstructionVisitor

public class InstructionSequenceReplacer
extends SimplifiedVisitor
implements InstructionVisitor, ConstantVisitor

This InstructionVisitor replaces a given pattern instruction sequence by another given replacement instruction sequence. The arguments of the instruction sequences can be wildcards that are matched and replaced.

See Also:

InstructionSequenceMatcher

Constructor Summary

InstructionSequenceReplacer(Constant[] patternConstants, Instruction[] patternInstructions, Instruction[] replacementInstructions, BranchTargetFinder branchTargetFinder, CodeAttributeEditor codeAttributeEditor)
Creates a new InstructionSequenceReplacer.

InstructionSequenceReplacer(Constant[] patternConstants, Instruction[] patternInstructions, Instruction[] replacementInstructions, BranchTargetFinder branchTargetFinder, CodeAttributeEditor codeAttributeEditor, InstructionVisitor extraInstructionVisitor)
Creates a new InstructionSequenceReplacer.

Method Summary

void	visitAnyInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, Instruction instruction) Visits any type of Instruction.

Methods inherited from class proguard.classfile.util.SimplifiedVisitor

visitAnnotation, visitAnnotation, visitAnnotation, visitAnnotation, visitAnnotation, visitAnnotationDefaultAttribute, visitAnnotationElementValue, visitAnyAnnotationsAttribute, visitAnyAttribute, visitAnyClass, visitAnyConstant, visitAnyElementValue, visitAnyMember, visitAnyMethodrefConstant, visitAnyParameterAnnotationsAttribute, visitAnyRefConstant, visitAnyStackMapFrame, visitAnySwitchInstruction, visitAnyVerificationType, visitArrayElementValue, visitBranchInstruction, visitClassConstant, visitClassElementValue, visitCodeAttribute, visitConstantElementValue, visitConstantInstruction, visitConstantValueAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDoubleConstant, visitDoubleType, visitEnclosingMethodAttribute, visitEnumConstantElementValue, visitExceptionsAttribute, visitFieldrefConstant, visitFloatConstant, visitFloatType, visitFullFrame, visitInnerClassesAttribute, visitIntegerConstant, visitIntegerType, visitInterfaceMethodrefConstant, visitLessZeroFrame, visitLibraryClass, visitLibraryField, visitLibraryMember, visitLibraryMethod, visitLineNumberTableAttribute, visitLocalVariableTableAttribute, visitLocalVariableTypeTableAttribute, visitLongConstant, visitLongType, visitLookUpSwitchInstruction, visitMethodrefConstant, visitMoreZeroFrame, visitNameAndTypeConstant, visitNullType, visitObjectType, visitProgramClass, visitProgramField, visitProgramMember, visitProgramMethod, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleParameterAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleParameterAnnotationsAttribute, visitSameOneFrame, visitSameZeroFrame, visitSignatureAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSimpleInstruction, visitSourceDirAttribute, visitSourceFileAttribute, visitStackDoubleType, visitStackFloatType, visitStackIntegerType, visitStackLongType, visitStackMapAttribute, visitStackMapTableAttribute, visitStackNullType, visitStackObjectType, visitStackTopType, visitStackUninitializedThisType, visitStackUninitializedType, visitStringConstant, visitSyntheticAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitTableSwitchInstruction, visitTopType, visitUninitializedThisType, visitUninitializedType, visitUnknownAttribute, visitUtf8Constant, visitVariableInstruction, visitVariablesDoubleType, visitVariablesFloatType, visitVariablesIntegerType, visitVariablesLongType, visitVariablesNullType, visitVariablesObjectType, visitVariablesTopType, visitVariablesUninitializedThisType, visitVariablesUninitializedType

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface proguard.classfile.instruction.visitor.InstructionVisitor

visitBranchInstruction, visitConstantInstruction, visitLookUpSwitchInstruction, visitSimpleInstruction, visitTableSwitchInstruction, visitVariableInstruction

Methods inherited from interface proguard.classfile.constant.visitor.ConstantVisitor

visitClassConstant, visitDoubleConstant, visitFieldrefConstant, visitFloatConstant, visitIntegerConstant, visitInterfaceMethodrefConstant, visitLongConstant, visitMethodrefConstant, visitNameAndTypeConstant, visitStringConstant, visitUtf8Constant

Constructor Detail

InstructionSequenceReplacer

public InstructionSequenceReplacer(Constant[] patternConstants,
                                   Instruction[] patternInstructions,
                                   Instruction[] replacementInstructions,
                                   BranchTargetFinder branchTargetFinder,
                                   CodeAttributeEditor codeAttributeEditor)

Creates a new InstructionSequenceReplacer.

Parameters:

patternConstants - any constants referenced by the pattern instruction.

patternInstructions - the pattern instruction sequence.

replacementInstructions - the replacement instruction sequence.

branchTargetFinder - a branch target finder that has been initialized to indicate branch targets in the visited code.

codeAttributeEditor - a code editor that can be used for accumulating changes to the code.

InstructionSequenceReplacer

public InstructionSequenceReplacer(Constant[] patternConstants,
                                   Instruction[] patternInstructions,
                                   Instruction[] replacementInstructions,
                                   BranchTargetFinder branchTargetFinder,
                                   CodeAttributeEditor codeAttributeEditor,
                                   InstructionVisitor extraInstructionVisitor)

Creates a new InstructionSequenceReplacer.

Parameters:

patternConstants - any constants referenced by the pattern instruction.

branchTargetFinder - a branch target finder that has been initialized to indicate branch targets in the visited code.

codeAttributeEditor - a code editor that can be used for accumulating changes to the code.

extraInstructionVisitor - an optional extra visitor for all deleted load instructions.

Method Detail

visitAnyInstruction

public void visitAnyInstruction(Clazz clazz,
                                Method method,
                                CodeAttribute codeAttribute,
                                int offset,
                                Instruction instruction)

Description copied from class: SimplifiedVisitor

Visits any type of Instruction.

Overrides:

visitAnyInstruction in class SimplifiedVisitor