proguard.optimize.peephole
Class BranchTargetFinder

java.lang.Object
  proguard.optimize.peephole.BranchTargetFinder

All Implemented Interfaces:

AttrInfoVisitor, ExceptionInfoVisitor, InstructionVisitor

public class BranchTargetFinder

extends Object

implements AttrInfoVisitor, InstructionVisitor, ExceptionInfoVisitor

This AttrInfoVisitor finds all branch targets in the CodeAttrInfo objects that it visits.

Constructor Summary

BranchTargetFinder(int codeLength)
Creates a new BranchTargetFinder.

Method Summary

boolean	isBranchTarget(int offset) Returns whether the instruction at the given offset is the target of a branch instruction in the CodeAttrInfo that was visited most recently.
void	visitBranchInstruction(ClassFile classFile, MethodInfo methodInfo, CodeAttrInfo codeAttrInfo, int offset, BranchInstruction branchInstruction)
void	visitCodeAttrInfo(ClassFile classFile, MethodInfo methodInfo, CodeAttrInfo codeAttrInfo)
void	visitConstantValueAttrInfo(ClassFile classFile, FieldInfo fieldInfo, ConstantValueAttrInfo constantValueAttrInfo)
void	visitCpInstruction(ClassFile classFile, MethodInfo methodInfo, CodeAttrInfo codeAttrInfo, int offset, CpInstruction cpInstruction)
void	visitDeprecatedAttrInfo(ClassFile classFile, DeprecatedAttrInfo deprecatedAttrInfo)
void	visitExceptionInfo(ClassFile classFile, MethodInfo methodInfo, CodeAttrInfo codeAttrInfo, ExceptionInfo exceptionInfo)
void	visitExceptionsAttrInfo(ClassFile classFile, MethodInfo methodInfo, ExceptionsAttrInfo exceptionsAttrInfo)
void	visitInnerClassesAttrInfo(ClassFile classFile, InnerClassesAttrInfo innerClassesAttrInfo)
void	visitLineNumberTableAttrInfo(ClassFile classFile, MethodInfo methodInfo, CodeAttrInfo codeAttrInfo, LineNumberTableAttrInfo lineNumberTableAttrInfo)
void	visitLocalVariableTableAttrInfo(ClassFile classFile, MethodInfo methodInfo, CodeAttrInfo codeAttrInfo, LocalVariableTableAttrInfo localVariableTableAttrInfo)
void	visitLookUpSwitchInstruction(ClassFile classFile, MethodInfo methodInfo, CodeAttrInfo codeAttrInfo, int offset, LookUpSwitchInstruction lookUpSwitchInstruction)
void	visitSignatureAttrInfo(ClassFile classFile, SignatureAttrInfo signatureAttrInfo)
void	visitSimpleInstruction(ClassFile classFile, MethodInfo methodInfo, CodeAttrInfo codeAttrInfo, int offset, SimpleInstruction simpleInstruction)
void	visitSourceDirAttrInfo(ClassFile classFile, SourceDirAttrInfo sourceDirAttrInfo)
void	visitSourceFileAttrInfo(ClassFile classFile, SourceFileAttrInfo sourceFileAttrInfo)
void	visitSyntheticAttrInfo(ClassFile classFile, SyntheticAttrInfo syntheticAttrInfo)
void	visitTableSwitchInstruction(ClassFile classFile, MethodInfo methodInfo, CodeAttrInfo codeAttrInfo, int offset, TableSwitchInstruction tableSwitchInstruction)
void	visitUnknownAttrInfo(ClassFile classFile, UnknownAttrInfo unknownAttrInfo)
void	visitVariableInstruction(ClassFile classFile, MethodInfo methodInfo, CodeAttrInfo codeAttrInfo, int offset, VariableInstruction variableInstruction)

Methods inherited from class java.lang.Object

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

Constructor Detail

BranchTargetFinder

public BranchTargetFinder(int codeLength)

Creates a new BranchTargetFinder.

Parameters:

codeLength - an estimate of the maximum length of all the code that will be edited.

Method Detail

isBranchTarget

public boolean isBranchTarget(int offset)

Returns whether the instruction at the given offset is the target of a branch instruction in the CodeAttrInfo that was visited most recently.

visitUnknownAttrInfo

public void visitUnknownAttrInfo(ClassFile classFile,
                                 UnknownAttrInfo unknownAttrInfo)

Specified by:

visitUnknownAttrInfo in interface AttrInfoVisitor

visitInnerClassesAttrInfo

public void visitInnerClassesAttrInfo(ClassFile classFile,
                                      InnerClassesAttrInfo innerClassesAttrInfo)

Specified by:

visitInnerClassesAttrInfo in interface AttrInfoVisitor

visitConstantValueAttrInfo

public void visitConstantValueAttrInfo(ClassFile classFile,
                                       FieldInfo fieldInfo,
                                       ConstantValueAttrInfo constantValueAttrInfo)

Specified by:

visitConstantValueAttrInfo in interface AttrInfoVisitor

visitExceptionsAttrInfo

public void visitExceptionsAttrInfo(ClassFile classFile,
                                    MethodInfo methodInfo,
                                    ExceptionsAttrInfo exceptionsAttrInfo)

Specified by:

visitExceptionsAttrInfo in interface AttrInfoVisitor

visitLineNumberTableAttrInfo

public void visitLineNumberTableAttrInfo(ClassFile classFile,
                                         MethodInfo methodInfo,
                                         CodeAttrInfo codeAttrInfo,
                                         LineNumberTableAttrInfo lineNumberTableAttrInfo)

Specified by:

visitLineNumberTableAttrInfo in interface AttrInfoVisitor

visitLocalVariableTableAttrInfo

public void visitLocalVariableTableAttrInfo(ClassFile classFile,
                                            MethodInfo methodInfo,
                                            CodeAttrInfo codeAttrInfo,
                                            LocalVariableTableAttrInfo localVariableTableAttrInfo)

Specified by:

visitLocalVariableTableAttrInfo in interface AttrInfoVisitor

visitSourceFileAttrInfo

public void visitSourceFileAttrInfo(ClassFile classFile,
                                    SourceFileAttrInfo sourceFileAttrInfo)

Specified by:

visitSourceFileAttrInfo in interface AttrInfoVisitor

visitSourceDirAttrInfo

public void visitSourceDirAttrInfo(ClassFile classFile,
                                   SourceDirAttrInfo sourceDirAttrInfo)

Specified by:

visitSourceDirAttrInfo in interface AttrInfoVisitor

visitDeprecatedAttrInfo

public void visitDeprecatedAttrInfo(ClassFile classFile,
                                    DeprecatedAttrInfo deprecatedAttrInfo)

Specified by:

visitDeprecatedAttrInfo in interface AttrInfoVisitor

visitSyntheticAttrInfo

public void visitSyntheticAttrInfo(ClassFile classFile,
                                   SyntheticAttrInfo syntheticAttrInfo)

Specified by:

visitSyntheticAttrInfo in interface AttrInfoVisitor

visitSignatureAttrInfo

public void visitSignatureAttrInfo(ClassFile classFile,
                                   SignatureAttrInfo signatureAttrInfo)

Specified by:

visitSignatureAttrInfo in interface AttrInfoVisitor

visitCodeAttrInfo

public void visitCodeAttrInfo(ClassFile classFile,
                              MethodInfo methodInfo,
                              CodeAttrInfo codeAttrInfo)

Specified by:

visitCodeAttrInfo in interface AttrInfoVisitor

visitSimpleInstruction

public void visitSimpleInstruction(ClassFile classFile,
                                   MethodInfo methodInfo,
                                   CodeAttrInfo codeAttrInfo,
                                   int offset,
                                   SimpleInstruction simpleInstruction)

Specified by:

visitSimpleInstruction in interface InstructionVisitor

visitCpInstruction

public void visitCpInstruction(ClassFile classFile,
                               MethodInfo methodInfo,
                               CodeAttrInfo codeAttrInfo,
                               int offset,
                               CpInstruction cpInstruction)

Specified by:

visitCpInstruction in interface InstructionVisitor

visitVariableInstruction

public void visitVariableInstruction(ClassFile classFile,
                                     MethodInfo methodInfo,
                                     CodeAttrInfo codeAttrInfo,
                                     int offset,
                                     VariableInstruction variableInstruction)

Specified by:

visitVariableInstruction in interface InstructionVisitor

visitBranchInstruction

public void visitBranchInstruction(ClassFile classFile,
                                   MethodInfo methodInfo,
                                   CodeAttrInfo codeAttrInfo,
                                   int offset,
                                   BranchInstruction branchInstruction)

Specified by:

visitBranchInstruction in interface InstructionVisitor

visitTableSwitchInstruction

public void visitTableSwitchInstruction(ClassFile classFile,
                                        MethodInfo methodInfo,
                                        CodeAttrInfo codeAttrInfo,
                                        int offset,
                                        TableSwitchInstruction tableSwitchInstruction)

Specified by:

visitTableSwitchInstruction in interface InstructionVisitor

visitLookUpSwitchInstruction

public void visitLookUpSwitchInstruction(ClassFile classFile,
                                         MethodInfo methodInfo,
                                         CodeAttrInfo codeAttrInfo,
                                         int offset,
                                         LookUpSwitchInstruction lookUpSwitchInstruction)

Specified by:

visitLookUpSwitchInstruction in interface InstructionVisitor

visitExceptionInfo

public void visitExceptionInfo(ClassFile classFile,
                               MethodInfo methodInfo,
                               CodeAttrInfo codeAttrInfo,
                               ExceptionInfo exceptionInfo)

Specified by:

visitExceptionInfo in interface ExceptionInfoVisitor