Class ComparisonInstruction

java.lang.Object

com.ibm.wala.shrike.shrikeBT.Instruction

com.ibm.wala.shrike.shrikeBT.ComparisonInstruction

All Implemented Interfaces:

Constants, IComparisonInstruction, IInstruction, Cloneable

public final class ComparisonInstruction
extends Instruction
implements IComparisonInstruction

This class represents comparisons between floats, longs and doubles.

Nested Class Summary

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

IComparisonInstruction.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)
IComparisonInstruction.Operator	getOperator()
int	getPoppedCount()
String	getPushedType(String[] types)	Computes the type of data pushed onto the stack, or null if none is pushed.
byte	getPushedWordSize()
String	getType()
int	hashCode()
boolean	isPEI()	PEI == "Potentially excepting instruction"
static ComparisonInstruction	make(String type, IComparisonInstruction.Operator operator)
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, getBranchTargets, getOpcode, isFallThrough, redirectTargets

Methods inherited from class java.lang.Object

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

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

getBranchTargets, isFallThrough, redirectTargets

Method Details

make

public static ComparisonInstruction make(String type,
 IComparisonInstruction.Operator operator)
                                  throws IllegalArgumentException

Throws:

IllegalArgumentException

equals

public boolean equals(Object o)

Overrides:

equals in class Object

getOperator

public IComparisonInstruction.Operator getOperator()

Specified by:

getOperator in interface IComparisonInstruction

Returns:

OPR_cmp (for long), OPR_cmpl, or OPR_cmpg (for float and double)

getType

public String getType()

Specified by:

getType in interface IComparisonInstruction

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

getPushedType

public String getPushedType(String[] types)

Description copied from class: Instruction

Computes the type of data pushed onto the stack, or null if none is pushed.

Specified by:

getPushedType in interface IInstruction

Overrides:

getPushedType in class Instruction

Parameters:

types - the types of the data popped off the stack by this instruction; if poppedTypes is null, then we don't know the incoming stack types and the result of this method may be less accurate

getPushedWordSize

public byte getPushedWordSize()

Specified by:

getPushedWordSize in interface IInstruction

Overrides:

getPushedWordSize in class Instruction

Returns:

the JVM word size of the value this instruction pushes onto the stack, or 0 if this instruction doesn't push anything onto the 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

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

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