com.mebigfatguy.fbcontrib.utils
Class RegisterUtils

java.lang.Object
  com.mebigfatguy.fbcontrib.utils.RegisterUtils

public class RegisterUtils
extends java.lang.Object

an auxillary class for managing and manipulating registers

Method Summary

static int	getALoadReg(edu.umd.cs.findbugs.visitclass.DismantleBytecode dbc, int seen) returns the register used to load a reference
static int	getAStoreReg(edu.umd.cs.findbugs.visitclass.DismantleBytecode dbc, int seen) returns the register used to store a reference
static int	getLoadReg(edu.umd.cs.findbugs.visitclass.DismantleBytecode dbc, int seen) returns the register used in a load operation
static int	getLocalVariableEndRange(org.apache.bcel.classfile.LocalVariableTable lvt, int reg, int curPC) returns the end pc of the visible range of this register at this pc
static int[]	getParameterRegisters(org.apache.bcel.classfile.Method obj) gets the set of registers used for parameters
static int	getStoreReg(edu.umd.cs.findbugs.visitclass.DismantleBytecode dbc, int seen) returns the register used in a store operation

Methods inherited from class java.lang.Object

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

Method Detail

getAStoreReg

public static int getAStoreReg(edu.umd.cs.findbugs.visitclass.DismantleBytecode dbc,
                               int seen)

returns the register used to store a reference

Parameters:

dbc - the dismantle byte code parsing the class

seen - the opcode of the store

Returns:

the register stored into

getALoadReg

public static int getALoadReg(edu.umd.cs.findbugs.visitclass.DismantleBytecode dbc,
                              int seen)

returns the register used to load a reference

Parameters:

dbc - the dismantle byte code parsing the class

seen - the opcode of the load

Returns:

the register loaded from

getStoreReg

public static int getStoreReg(edu.umd.cs.findbugs.visitclass.DismantleBytecode dbc,
                              int seen)

returns the register used in a store operation

Parameters:

dbc - the dismantle byte code parsing the class

seen - the opcode of the store

Returns:

the register stored into

getLoadReg

public static int getLoadReg(edu.umd.cs.findbugs.visitclass.DismantleBytecode dbc,
                             int seen)

returns the register used in a load operation

Parameters:

dbc - the dismantle byte code parsing the class

seen - the opcode of the load

Returns:

the register stored into

getLocalVariableEndRange

public static int getLocalVariableEndRange(org.apache.bcel.classfile.LocalVariableTable lvt,
                                           int reg,
                                           int curPC)

returns the end pc of the visible range of this register at this pc

Parameters:

lvt - the local variable table for this method

reg - the register to examine

curPC - the pc of the current instruction

Returns:

the endpc

getParameterRegisters

public static int[] getParameterRegisters(org.apache.bcel.classfile.Method obj)

gets the set of registers used for parameters

Parameters:

obj - the context object for the method to find the parameter registers of