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.

Author:

Eric Lafortune

See Also:

InstructionSequenceMatcher

Field Summary

Fields

Modifier and Type	Field and Description
static int	A
static int	B
static int	BOOLEAN_A_STRING
static int	BOOLEAN_B_STRING
static int	C
static int	CHAR_A_STRING
static int	CHAR_B_STRING
static int	D
static int	DOUBLE_A_STRING
static int	DOUBLE_B_STRING
static int	FLOAT_A_STRING
static int	FLOAT_B_STRING
static int	INT_A_STRING
static int	INT_B_STRING
static int	LONG_A_STRING
static int	LONG_B_STRING
static int	STRING_A_LENGTH
static int	STRING_A_STRING
static int	STRING_B_STRING
static int	X
static int	Y
static int	Z

Constructor Summary

Constructors

Constructor and Description
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

Methods

Modifier and Type	Method and Description
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, visitAnnotation, visitAnnotationDefaultAttribute, visitAnnotationElementValue, visitAnyAnnotationsAttribute, visitAnyAttribute, visitAnyClass, visitAnyConstant, visitAnyElementValue, visitAnyMember, visitAnyMethodrefConstant, visitAnyParameterAnnotationsAttribute, visitAnyRefConstant, visitAnyStackMapFrame, visitAnySwitchInstruction, visitAnyTargetInfo, visitAnyTypeAnnotationsAttribute, visitAnyVerificationType, visitArrayElementValue, visitBootstrapMethodsAttribute, visitBranchInstruction, visitCatchTargetInfo, visitClassConstant, visitClassElementValue, visitCodeAttribute, visitConstantElementValue, visitConstantInstruction, visitConstantValueAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDeprecatedAttribute, visitDoubleConstant, visitDoubleType, visitEmptyTargetInfo, visitEmptyTargetInfo, visitEmptyTargetInfo, visitEnclosingMethodAttribute, visitEnumConstantElementValue, visitExceptionsAttribute, visitFieldrefConstant, visitFloatConstant, visitFloatType, visitFormalParameterTargetInfo, visitFullFrame, visitInnerClassesAttribute, visitIntegerConstant, visitIntegerType, visitInterfaceMethodrefConstant, visitInvokeDynamicConstant, visitLessZeroFrame, visitLibraryClass, visitLibraryField, visitLibraryMember, visitLibraryMethod, visitLineNumberTableAttribute, visitLocalVariableTableAttribute, visitLocalVariableTargetInfo, visitLocalVariableTypeTableAttribute, visitLongConstant, visitLongType, visitLookUpSwitchInstruction, visitMethodHandleConstant, visitMethodParametersAttribute, visitMethodrefConstant, visitMethodTypeConstant, visitMoreZeroFrame, visitNameAndTypeConstant, visitNullType, visitObjectType, visitOffsetTargetInfo, visitProgramClass, visitProgramField, visitProgramMember, visitProgramMethod, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleAnnotationsAttribute, visitRuntimeInvisibleParameterAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeInvisibleTypeAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleAnnotationsAttribute, visitRuntimeVisibleParameterAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitRuntimeVisibleTypeAnnotationsAttribute, visitSameOneFrame, visitSameZeroFrame, visitSignatureAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSignatureAttribute, visitSimpleInstruction, visitSourceDirAttribute, visitSourceFileAttribute, visitStackDoubleType, visitStackFloatType, visitStackIntegerType, visitStackLongType, visitStackMapAttribute, visitStackMapTableAttribute, visitStackNullType, visitStackObjectType, visitStackTopType, visitStackUninitializedThisType, visitStackUninitializedType, visitStringConstant, visitSuperTypeTargetInfo, visitSyntheticAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitSyntheticAttribute, visitTableSwitchInstruction, visitThrowsTargetInfo, visitTopType, visitTypeAnnotation, visitTypeAnnotation, visitTypeAnnotation, visitTypeAnnotation, visitTypeAnnotation, visitTypeAnnotation, visitTypeArgumentTargetInfo, visitTypeParameterBoundTargetInfo, visitTypeParameterBoundTargetInfo, visitTypeParameterBoundTargetInfo, visitTypeParameterBoundTargetInfo, visitTypeParameterTargetInfo, visitTypeParameterTargetInfo, visitTypePathInfo, visitTypePathInfo, visitTypePathInfo, visitTypePathInfo, visitTypePathInfo, 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, visitInvokeDynamicConstant, visitLongConstant, visitMethodHandleConstant, visitMethodrefConstant, visitMethodTypeConstant, visitNameAndTypeConstant, visitStringConstant, visitUtf8Constant

Field Detail

X

public static final int X

See Also:

Constant Field Values

Y

public static final int Y

See Also:

Constant Field Values

Z

public static final int Z

See Also:

Constant Field Values

A

public static final int A

See Also:

Constant Field Values

B

public static final int B

See Also:

Constant Field Values

C

public static final int C

See Also:

Constant Field Values

D

public static final int D

See Also:

Constant Field Values

STRING_A_LENGTH

public static final int STRING_A_LENGTH

See Also:

Constant Field Values

BOOLEAN_A_STRING

public static final int BOOLEAN_A_STRING

See Also:

Constant Field Values

CHAR_A_STRING

public static final int CHAR_A_STRING

See Also:

Constant Field Values

INT_A_STRING

public static final int INT_A_STRING

See Also:

Constant Field Values

LONG_A_STRING

public static final int LONG_A_STRING

See Also:

Constant Field Values

FLOAT_A_STRING

public static final int FLOAT_A_STRING

See Also:

Constant Field Values

DOUBLE_A_STRING

public static final int DOUBLE_A_STRING

See Also:

Constant Field Values

STRING_A_STRING

public static final int STRING_A_STRING

See Also:

Constant Field Values

BOOLEAN_B_STRING

public static final int BOOLEAN_B_STRING

See Also:

Constant Field Values

CHAR_B_STRING

public static final int CHAR_B_STRING

See Also:

Constant Field Values

INT_B_STRING

public static final int INT_B_STRING

See Also:

Constant Field Values

LONG_B_STRING

public static final int LONG_B_STRING

See Also:

Constant Field Values

FLOAT_B_STRING

public static final int FLOAT_B_STRING

See Also:

Constant Field Values

DOUBLE_B_STRING

public static final int DOUBLE_B_STRING

See Also:

Constant Field Values

STRING_B_STRING

public static final int STRING_B_STRING

See Also:

Constant Field Values

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