java.lang.Object
- com.ibm.wala.shrike.shrikeBT.Instruction
- - com.ibm.wala.shrike.shrikeBT.ShiftInstruction

All Implemented Interfaces:

Constants, IInstruction, IShiftInstruction, java.lang.Cloneable
```
public final class ShiftInstruction
extends Instruction
implements IShiftInstruction
```
ShiftInstructions are distinguished from BinaryOpInstructions because most binary operations in the JVM require both parameters to be the same type, but shifts always take one int parameter.

Nested Class Summary
- Nested classes/interfaces inherited from interface com.ibm.wala.shrike.shrikeBT.IInstruction
  IInstruction.Visitor
- Nested classes/interfaces inherited from interface com.ibm.wala.shrike.shrikeBT.IShiftInstruction
  IShiftInstruction.Operator

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

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`equals(java.lang.Object o)`
`IShiftInstruction.Operator`	`getOperator()`
`int`	`getPoppedCount()`
`java.lang.String`	`getPushedType(java.lang.String[] types)`	Computes the type of data pushed onto the stack, or null if none is pushed.
`byte`	`getPushedWordSize()`
`java.lang.String`	`getType()`
`int`	`hashCode()`
`boolean`	`isPEI()`	PEI == "Potentially excepting instruction"
`boolean`	`isUnsigned()`
`static ShiftInstruction`	`make(java.lang.String type, IShiftInstruction.Operator operator)`
`java.lang.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 Detail
  - make
```
public static ShiftInstruction make(java.lang.String type,
                                    IShiftInstruction.Operator operator)
                             throws java.lang.IllegalArgumentException
```
    Throws:
    
    java.lang.IllegalArgumentException
  - equals
```
public boolean equals(java.lang.Object o)
```
    Overrides:
    
    equals in class java.lang.Object
  - getOperator
```
public IShiftInstruction.Operator getOperator()
```
    Specified by:
    
    getOperator in interface IShiftInstruction
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class java.lang.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 java.lang.String getPushedType(java.lang.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.
  - getType
```
public java.lang.String getType()
```
    Specified by:
    
    getType in interface IShiftInstruction
  - visit
```
public void visit(IInstruction.Visitor v)
           throws java.lang.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:
    
    java.lang.NullPointerException
  - toString
```
public java.lang.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
  - isUnsigned
```
public boolean isUnsigned()
```
    Specified by:
    
    isUnsigned in interface IShiftInstruction

Class ShiftInstruction

Nested Class Summary

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

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

Field Summary

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

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

Method Summary

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

Methods inherited from class java.lang.Object

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

Method Detail

make

equals

getOperator

hashCode

getPoppedCount

getPushedType

getPushedWordSize

getType

visit

toString

isPEI

isUnsigned