Class ConditionalBranchInstruction

java.lang.Object

com.ibm.wala.shrike.shrikeBT.Instruction

com.ibm.wala.shrike.shrikeBT.ConditionalBranchInstruction

All Implemented Interfaces:

Constants, IConditionalBranchInstruction, IInstruction, Cloneable

public final class ConditionalBranchInstruction
extends Instruction
implements IConditionalBranchInstruction

This class represents conditional branches. A conditional branch tests two integers or two object references for some relationship, and takes the branch if the relationship holds.

Nested Class Summary

Nested classes/interfaces inherited from interface com.ibm.wala.shrike.shrikeBT.IConditionalBranchInstruction

IConditionalBranchInstruction.IOperator, IConditionalBranchInstruction.Operator

Nested classes/interfaces inherited from interface com.ibm.wala.shrike.shrikeBT.IInstruction

IInstruction.Visitor

Field Summary

Fields inherited from class com.ibm.wala.shrike.shrikeBT.Instruction

noInstructions

Fields inherited from interface com.ibm.wala.shrike.shrikeBT.Constants

ACC_ABSTRACT, ACC_ANNOTATION, ACC_ENUM, ACC_FINAL, ACC_INTERFACE, ACC_MODULE, ACC_NATIVE, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_STATIC, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_VOLATILE, CONSTANT_Class, CONSTANT_Double, CONSTANT_FieldRef, CONSTANT_Float, CONSTANT_Integer, CONSTANT_InterfaceMethodRef, CONSTANT_InvokeDynamic, CONSTANT_Long, CONSTANT_MethodHandle, CONSTANT_MethodRef, CONSTANT_MethodType, CONSTANT_NameAndType, CONSTANT_String, CONSTANT_Utf8, indexedTypes, indexedTypes_T, MAYBE, NO, OP_aaload, OP_aastore, OP_aconst_null, OP_aload, OP_aload_0, OP_aload_1, OP_aload_2, OP_aload_3, OP_anewarray, OP_areturn, OP_arraylength, OP_astore, OP_astore_0, OP_astore_1, OP_astore_2, OP_astore_3, OP_athrow, OP_baload, OP_bastore, OP_bipush, OP_caload, OP_castore, OP_checkcast, OP_d2f, OP_d2i, OP_d2l, OP_dadd, OP_daload, OP_dastore, OP_dcmpg, OP_dcmpl, OP_dconst_0, OP_dconst_1, OP_ddiv, OP_dload, OP_dload_0, OP_dload_1, OP_dload_2, OP_dload_3, OP_dmul, OP_dneg, OP_drem, OP_dreturn, OP_dstore, OP_dstore_0, OP_dstore_1, OP_dstore_2, OP_dstore_3, OP_dsub, OP_dup, OP_dup_x1, OP_dup_x2, OP_dup2, OP_dup2_x1, OP_dup2_x2, OP_f2d, OP_f2i, OP_f2l, OP_fadd, OP_faload, OP_fastore, OP_fcmpg, OP_fcmpl, OP_fconst_0, OP_fconst_1, OP_fconst_2, OP_fdiv, OP_fload, OP_fload_0, OP_fload_1, OP_fload_2, OP_fload_3, OP_fmul, OP_fneg, OP_frem, OP_freturn, OP_fstore, OP_fstore_0, OP_fstore_1, OP_fstore_2, OP_fstore_3, OP_fsub, OP_getfield, OP_getstatic, OP_goto, OP_goto_w, OP_i2b, OP_i2c, OP_i2d, OP_i2f, OP_i2l, OP_i2s, OP_iadd, OP_iaload, OP_iand, OP_iastore, OP_iconst_0, OP_iconst_1, OP_iconst_2, OP_iconst_3, OP_iconst_4, OP_iconst_5, OP_iconst_m1, OP_idiv, OP_if_acmpeq, OP_if_acmpne, OP_if_icmpeq, OP_if_icmpge, OP_if_icmpgt, OP_if_icmple, OP_if_icmplt, OP_if_icmpne, OP_ifeq, OP_ifge, OP_ifgt, OP_ifle, OP_iflt, OP_ifne, OP_ifnonnull, OP_ifnull, OP_iinc, OP_iload, OP_iload_0, OP_iload_1, OP_iload_2, OP_iload_3, OP_imul, OP_ineg, OP_instanceof, OP_invokedynamic, OP_invokeinterface, OP_invokespecial, OP_invokestatic, OP_invokevirtual, OP_ior, OP_irem, OP_ireturn, OP_ishl, OP_ishr, OP_istore, OP_istore_0, OP_istore_1, OP_istore_2, OP_istore_3, OP_isub, OP_iushr, OP_ixor, OP_jsr, OP_jsr_w, OP_l2d, OP_l2f, OP_l2i, OP_ladd, OP_laload, OP_land, OP_lastore, OP_lcmp, OP_lconst_0, OP_lconst_1, OP_ldc, OP_ldc_w, OP_ldc2_w, OP_ldiv, OP_lload, OP_lload_0, OP_lload_1, OP_lload_2, OP_lload_3, OP_lmul, OP_lneg, OP_lookupswitch, OP_lor, OP_lrem, OP_lreturn, OP_lshl, OP_lshr, OP_lstore, OP_lstore_0, OP_lstore_1, OP_lstore_2, OP_lstore_3, OP_lsub, OP_lushr, OP_lxor, OP_monitorenter, OP_monitorexit, OP_multianewarray, OP_new, OP_newarray, OP_nop, OP_pop, OP_pop2, OP_putfield, OP_putstatic, OP_ret, OP_return, OP_saload, OP_sastore, OP_sipush, OP_swap, OP_tableswitch, OP_wide, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TYPE_boolean, TYPE_boolean_index, TYPE_byte, TYPE_byte_index, TYPE_char, TYPE_char_index, TYPE_Class, TYPE_double, TYPE_double_index, TYPE_Error, TYPE_Exception, TYPE_float, TYPE_float_index, TYPE_int, TYPE_int_index, TYPE_long, TYPE_long_index, TYPE_MethodHandle, TYPE_MethodType, TYPE_null, TYPE_Object, TYPE_Object_index, TYPE_RuntimeException, TYPE_short, TYPE_short_index, TYPE_String, TYPE_Throwable, TYPE_unknown, TYPE_void, YES

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
int[]	getBranchTargets()
IConditionalBranchInstruction.Operator	getOperator()
int	getPoppedCount()
int	getTarget()
String	getType()
int	hashCode()
boolean	isPEI()	PEI == "Potentially excepting instruction"
static ConditionalBranchInstruction	make(short opcode, int label)
static ConditionalBranchInstruction	make(String type, IConditionalBranchInstruction.Operator operator, int label)
IInstruction	redirectTargets(int[] targetMap)
String	toString()	Subclasses must implement toString.
void	visit(IInstruction.Visitor v)	Apply a Visitor to this instruction.

Methods inherited from class com.ibm.wala.shrike.shrikeBT.Instruction

clone, getOpcode, getPushedType, getPushedWordSize, isFallThrough

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.ibm.wala.shrike.shrikeBT.IInstruction

getPushedType, getPushedWordSize, isFallThrough

Method Details

make

public static ConditionalBranchInstruction make(String type,
 IConditionalBranchInstruction.Operator operator,
 int label)
                                         throws IllegalArgumentException

Throws:

IllegalArgumentException

make

public static ConditionalBranchInstruction make(short opcode,
 int label)
                                         throws IllegalArgumentException

Throws:

IllegalArgumentException

equals

public boolean equals(Object o)

Overrides:

equals in class Object

toString

public String toString()

Description copied from class: Instruction

Subclasses must implement toString.

Specified by:

toString in interface IInstruction

Specified by:

toString in class Instruction

getBranchTargets

public int[] getBranchTargets()

Specified by:

getBranchTargets in interface IInstruction

Overrides:

getBranchTargets in class Instruction

Returns:

an array containing the labels this instruction can branch to (not including the following instruction if this instruction 'falls through')

getTarget

public int getTarget()

Specified by:

getTarget in interface IConditionalBranchInstruction

redirectTargets

public IInstruction redirectTargets(int[] targetMap)
                             throws IllegalArgumentException

Specified by:

redirectTargets in interface IInstruction

Overrides:

redirectTargets in class Instruction

Returns:

an Instruction equivalent to this one but with any branch labels updated by looking them up in the targetMap array

Throws:

IllegalArgumentException

getOperator

public IConditionalBranchInstruction.Operator getOperator()

Specified by:

getOperator in interface IConditionalBranchInstruction

getType

public String getType()

Specified by:

getType in interface IConditionalBranchInstruction

hashCode

public int hashCode()

Overrides:

hashCode in class Object

getPoppedCount

public int getPoppedCount()

Specified by:

getPoppedCount in interface IInstruction

Overrides:

getPoppedCount in class Instruction

Returns:

the number of values this instruction pops off the working stack

visit

public void visit(IInstruction.Visitor v)
           throws NullPointerException

Description copied from class: Instruction

Apply a Visitor to this instruction. We invoke the appropriate Visitor method according to the type of this instruction.

Specified by:

visit in interface IInstruction

Specified by:

visit in class Instruction

Throws:

NullPointerException

isPEI

public boolean isPEI()

Description copied from interface: IInstruction

PEI == "Potentially excepting instruction"

Specified by:

isPEI in interface IInstruction

Returns:

true iff this instruction might throw an exception