org.jikesrvm.compilers.opt.ir

Class LookupSwitch

java.lang.Object

org.jikesrvm.compilers.opt.ir.InstructionFormat

org.jikesrvm.compilers.opt.ir.LookupSwitch

public final class LookupSwitch
extends InstructionFormat

The LookupSwitch InstructionFormat class. The header comment for Instruction contains an explanation of the role of InstructionFormats in the opt compiler's IR.

Field Summary

Fields inherited from class org.jikesrvm.compilers.opt.ir.InstructionFormat

ALoad_format, ALoad_traits, ARCH_INDEPENDENT_INSTR_FORMAT_END_format, AStore_format, AStore_traits, Athrow_format, Athrow_traits, Attempt_format, Attempt_traits, BBend_format, BBend_traits, Binary_format, Binary_traits, BooleanCmp_format, BooleanCmp_traits, BoundsCheck_format, BoundsCheck_traits, CacheOp_format, CacheOp_traits, Call_format, Call_traits, CondMove_format, CondMove_traits, Empty_format, Empty_traits, GetField_format, GetField_traits, GetStatic_format, GetStatic_traits, Goto_format, Goto_traits, GuardedBinary_format, GuardedBinary_traits, GuardedSet_format, GuardedSet_traits, GuardedUnary_format, GuardedUnary_traits, IfCmp_format, IfCmp_traits, IfCmp2_format, IfCmp2_traits, InlineGuard_format, InlineGuard_traits, InstanceOf_format, InstanceOf_traits, InstrumentedCounter_format, InstrumentedCounter_traits, Label_format, Label_traits, Load_format, Load_traits, LookupSwitch_format, LookupSwitch_traits, LowTableSwitch_format, LowTableSwitch_traits, MIN_OPERAND_ARRAY_LENGTH, MonitorOp_format, MonitorOp_traits, Move_format, Move_traits, Multianewarray_format, Multianewarray_traits, New_format, New_traits, NewArray_format, NewArray_traits, Nullary_format, Nullary_traits, NullCheck_format, NullCheck_traits, OsrBarrier_format, OsrBarrier_traits, OsrPoint_format, OsrPoint_traits, Phi_format, Phi_traits, Prepare_format, Prepare_traits, Prologue_format, Prologue_traits, PutField_format, PutField_traits, PutStatic_format, PutStatic_traits, Return_format, Return_traits, Store_format, Store_traits, StoreCheck_format, StoreCheck_traits, TableSwitch_format, TableSwitch_traits, Trap_format, Trap_traits, TrapIf_format, TrapIf_traits, TypeCheck_format, TypeCheck_traits, Unary_format, Unary_traits, Unassigned_format, ZeroCheck_format, ZeroCheck_traits

Constructor Summary

Constructors

Constructor and Description
LookupSwitch()

Method Summary

Modifier and Type	Method and Description
static boolean	conforms(Instruction i) InstructionFormat identification method for LookupSwitch.
static boolean	conforms(Operator o) InstructionFormat identification method for LookupSwitch.
static Instruction	create(Operator o, Operand Value, Operand Unknown1, Operand Unknown2, BranchOperand Default, BranchProfileOperand DefaultBranchProfile, int numVarOps) Create an instruction of the LookupSwitch instruction format.
static BranchProfileOperand	getBranchProfile(Instruction i, int k) Get the k'th operand called BranchProfile from the argument instruction.
static BranchProfileOperand	getClearBranchProfile(Instruction i, int k) Get the k'th operand called BranchProfile from the argument instruction clearing its instruction pointer.
static BranchOperand	getClearDefault(Instruction i) Get the operand called Default from the argument instruction clearing its instruction pointer.
static BranchProfileOperand	getClearDefaultBranchProfile(Instruction i) Get the operand called DefaultBranchProfile from the argument instruction clearing its instruction pointer.
static IntConstantOperand	getClearMatch(Instruction i, int k) Get the k'th operand called Match from the argument instruction clearing its instruction pointer.
static BranchOperand	getClearTarget(Instruction i, int k) Get the k'th operand called Target from the argument instruction clearing its instruction pointer.
static Operand	getClearUnknown1(Instruction i) Get the operand called Unknown1 from the argument instruction clearing its instruction pointer.
static Operand	getClearUnknown2(Instruction i) Get the operand called Unknown2 from the argument instruction clearing its instruction pointer.
static Operand	getClearValue(Instruction i) Get the operand called Value from the argument instruction clearing its instruction pointer.
static BranchOperand	getDefault(Instruction i) Get the operand called Default from the argument instruction.
static BranchProfileOperand	getDefaultBranchProfile(Instruction i) Get the operand called DefaultBranchProfile from the argument instruction.
static IntConstantOperand	getMatch(Instruction i, int k) Get the k'th operand called Match from the argument instruction.
static int	getNumberOfBranchProfiles(Instruction i) How many variable-length operands called BranchProfiles does the argument instruction have?
static int	getNumberOfMatches(Instruction i) How many variable-length operands called Matches does the argument instruction have?
static int	getNumberOfTargets(Instruction i) How many variable-length operands called Targets does the argument instruction have?
static BranchOperand	getTarget(Instruction i, int k) Get the k'th operand called Target from the argument instruction.
static Operand	getUnknown1(Instruction i) Get the operand called Unknown1 from the argument instruction.
static Operand	getUnknown2(Instruction i) Get the operand called Unknown2 from the argument instruction.
static Operand	getValue(Instruction i) Get the operand called Value from the argument instruction.
static boolean	hasBranchProfile(Instruction i, int k) Does the argument instruction have a non-null k'th operand named BranchProfile?
static boolean	hasBranchProfiles(Instruction i) Does the argument instruction have any operands named BranchProfile?
static boolean	hasDefault(Instruction i) Does the argument instruction have a non-null operand named Default?
static boolean	hasDefaultBranchProfile(Instruction i) Does the argument instruction have a non-null operand named DefaultBranchProfile?
static boolean	hasMatch(Instruction i, int k) Does the argument instruction have a non-null k'th operand named Match?
static boolean	hasMatches(Instruction i) Does the argument instruction have any Matches operands?
static boolean	hasTarget(Instruction i, int k) Does the argument instruction have a non-null k'th operand named Target?
static boolean	hasTargets(Instruction i) Does the argument instruction have any operands named Target?
static boolean	hasUnknown1(Instruction i) Does the argument instruction have a non-null operand named Unknown1?
static boolean	hasUnknown2(Instruction i) Does the argument instruction have a non-null operand named Unknown2?
static boolean	hasValue(Instruction i) Does the argument instruction have a non-null operand named Value?
static int	indexOfBranchProfile(Instruction i, int k) Return the index of the k'th operand called BranchProfile in the argument instruction.
static int	indexOfBranchProfiles(Instruction i) Return the index of the first operand called BranchProfile in the argument instruction.
static int	indexOfDefault(Instruction i) Return the index of the operand called Default in the argument instruction.
static int	indexOfDefaultBranchProfile(Instruction i) Return the index of the operand called DefaultBranchProfile in the argument instruction.
static int	indexOfMatch(Instruction i, int k) Return the index of the k'th operand called Match in the argument instruction.
static int	indexOfMatches(Instruction i) Return the index of the first operand called Matches in the argument instruction.
static int	indexOfTarget(Instruction i, int k) Return the index of the k'th operand called Target in the argument instruction.
static int	indexOfTargets(Instruction i) Return the index of the first operand called Target in the argument instruction.
static int	indexOfUnknown1(Instruction i) Return the index of the operand called Unknown1 in the argument instruction.
static int	indexOfUnknown2(Instruction i) Return the index of the operand called Unknown2 in the argument instruction.
static int	indexOfValue(Instruction i) Return the index of the operand called Value in the argument instruction.
static Instruction	mutate(Instruction i, Operator o, Operand Value, Operand Unknown1, Operand Unknown2, BranchOperand Default, BranchProfileOperand DefaultBranchProfile, int numVarOps) Mutate the argument instruction into an instruction of the LookupSwitch instruction format having the specified operator and operands.
static void	resizeNumberOfBranchProfiles(Instruction i, int numVarOps) Change the number of BranchProfiles that may be stored in the argument instruction to numVarOps.
static void	resizeNumberOfMatches(Instruction i, int numVarOps) Change the number of Matches operands that may be stored in the argument instruction to numVarOps.
static void	resizeNumberOfTargets(Instruction i, int numVarOps) Change the number of Targets that may be stored in the argument instruction to numVarOps.
static void	setBranchProfile(Instruction i, int k, BranchProfileOperand o) Set the k'th operand called BranchProfile in the argument instruction to the argument operand.
static void	setDefault(Instruction i, BranchOperand Default) Set the operand called Default in the argument instruction to the argument operand.
static void	setDefaultBranchProfile(Instruction i, BranchProfileOperand DefaultBranchProfile) Set the operand called DefaultBranchProfile in the argument instruction to the argument operand.
static void	setMatch(Instruction i, int k, IntConstantOperand o) Set the k'th operand called Match in the argument instruction to the argument operand.
static void	setTarget(Instruction i, int k, BranchOperand o) Set the k'th operand called Target in the argument instruction to the argument operand.
static void	setUnknown1(Instruction i, Operand Unknown1) Set the operand called Unknown1 in the argument instruction to the argument operand.
static void	setUnknown2(Instruction i, Operand Unknown2) Set the operand called Unknown2 in the argument instruction to the argument operand.
static void	setValue(Instruction i, Operand Value) Set the operand called Value in the argument instruction to the argument operand.

Methods inherited from class org.jikesrvm.compilers.opt.ir.InstructionFormat

fail, fail

Methods inherited from class java.lang.Object

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

Constructor Detail

LookupSwitch

public LookupSwitch()

Method Detail

conforms

public static boolean conforms(Instruction i)

InstructionFormat identification method for LookupSwitch.

Parameters:

i - an instruction

Returns:

true if the InstructionFormat of the argument instruction is LookupSwitch or false if it is not.

conforms

public static boolean conforms(Operator o)

InstructionFormat identification method for LookupSwitch.

Parameters:

o - an instruction

Returns:

true if the InstructionFormat of the argument operator is LookupSwitch or false if it is not.

getValue

public static Operand getValue(Instruction i)

Get the operand called Value from the argument instruction. Note that the returned operand will still point to its containing instruction.

Parameters:

i - the instruction to fetch the operand from

Returns:

the operand called Value

getClearValue

public static Operand getClearValue(Instruction i)

Get the operand called Value from the argument instruction clearing its instruction pointer. The returned operand will not point to any containing instruction.

Parameters:

i - the instruction to fetch the operand from

Returns:

the operand called Value

setValue

public static void setValue(Instruction i,
                            Operand Value)

Set the operand called Value in the argument instruction to the argument operand. The operand will now point to the argument instruction as its containing instruction.

Parameters:

i - the instruction in which to store the operand

Value - the operand to store

indexOfValue

public static int indexOfValue(Instruction i)

Return the index of the operand called Value in the argument instruction.

Parameters:

i - the instruction to access.

Returns:

the index of the operand called Value in the argument instruction

hasValue

public static boolean hasValue(Instruction i)

Does the argument instruction have a non-null operand named Value?

Parameters:

i - the instruction to access.

Returns:

true if the instruction has an non-null operand named Value or false if it does not.

getUnknown1

public static Operand getUnknown1(Instruction i)

Get the operand called Unknown1 from the argument instruction. Note that the returned operand will still point to its containing instruction.

Parameters:

i - the instruction to fetch the operand from

Returns:

the operand called Unknown1

getClearUnknown1

public static Operand getClearUnknown1(Instruction i)

Get the operand called Unknown1 from the argument instruction clearing its instruction pointer. The returned operand will not point to any containing instruction.

Parameters:

i - the instruction to fetch the operand from

Returns:

the operand called Unknown1

setUnknown1

public static void setUnknown1(Instruction i,
                               Operand Unknown1)

Set the operand called Unknown1 in the argument instruction to the argument operand. The operand will now point to the argument instruction as its containing instruction.

Parameters:

i - the instruction in which to store the operand

Unknown1 - the operand to store

indexOfUnknown1

public static int indexOfUnknown1(Instruction i)

Return the index of the operand called Unknown1 in the argument instruction.

Parameters:

i - the instruction to access.

Returns:

the index of the operand called Unknown1 in the argument instruction

hasUnknown1

public static boolean hasUnknown1(Instruction i)

Does the argument instruction have a non-null operand named Unknown1?

Parameters:

i - the instruction to access.

Returns:

true if the instruction has an non-null operand named Unknown1 or false if it does not.

getUnknown2

public static Operand getUnknown2(Instruction i)

Get the operand called Unknown2 from the argument instruction. Note that the returned operand will still point to its containing instruction.

Parameters:

i - the instruction to fetch the operand from

Returns:

the operand called Unknown2

getClearUnknown2

public static Operand getClearUnknown2(Instruction i)

Get the operand called Unknown2 from the argument instruction clearing its instruction pointer. The returned operand will not point to any containing instruction.

Parameters:

i - the instruction to fetch the operand from

Returns:

the operand called Unknown2

setUnknown2

public static void setUnknown2(Instruction i,
                               Operand Unknown2)

Set the operand called Unknown2 in the argument instruction to the argument operand. The operand will now point to the argument instruction as its containing instruction.

Parameters:

i - the instruction in which to store the operand

Unknown2 - the operand to store

indexOfUnknown2

public static int indexOfUnknown2(Instruction i)

Return the index of the operand called Unknown2 in the argument instruction.

Parameters:

i - the instruction to access.

Returns:

the index of the operand called Unknown2 in the argument instruction

hasUnknown2

public static boolean hasUnknown2(Instruction i)

Does the argument instruction have a non-null operand named Unknown2?

Parameters:

i - the instruction to access.

Returns:

true if the instruction has an non-null operand named Unknown2 or false if it does not.

getDefault

public static BranchOperand getDefault(Instruction i)

Get the operand called Default from the argument instruction. Note that the returned operand will still point to its containing instruction.

Parameters:

i - the instruction to fetch the operand from

Returns:

the operand called Default

getClearDefault

public static BranchOperand getClearDefault(Instruction i)

Get the operand called Default from the argument instruction clearing its instruction pointer. The returned operand will not point to any containing instruction.

Parameters:

i - the instruction to fetch the operand from

Returns:

the operand called Default

setDefault

public static void setDefault(Instruction i,
                              BranchOperand Default)

Set the operand called Default in the argument instruction to the argument operand. The operand will now point to the argument instruction as its containing instruction.

Parameters:

i - the instruction in which to store the operand

Default - the operand to store

indexOfDefault

public static int indexOfDefault(Instruction i)

Return the index of the operand called Default in the argument instruction.

Parameters:

i - the instruction to access.

Returns:

the index of the operand called Default in the argument instruction

hasDefault

public static boolean hasDefault(Instruction i)

Does the argument instruction have a non-null operand named Default?

Parameters:

i - the instruction to access.

Returns:

true if the instruction has an non-null operand named Default or false if it does not.

getDefaultBranchProfile

public static BranchProfileOperand getDefaultBranchProfile(Instruction i)

Get the operand called DefaultBranchProfile from the argument instruction. Note that the returned operand will still point to its containing instruction.

Parameters:

i - the instruction to fetch the operand from

Returns:

the operand called DefaultBranchProfile

getClearDefaultBranchProfile

public static BranchProfileOperand getClearDefaultBranchProfile(Instruction i)

Get the operand called DefaultBranchProfile from the argument instruction clearing its instruction pointer. The returned operand will not point to any containing instruction.

Parameters:

i - the instruction to fetch the operand from

Returns:

the operand called DefaultBranchProfile

setDefaultBranchProfile

public static void setDefaultBranchProfile(Instruction i,
                                           BranchProfileOperand DefaultBranchProfile)

Set the operand called DefaultBranchProfile in the argument instruction to the argument operand. The operand will now point to the argument instruction as its containing instruction.

Parameters:

i - the instruction in which to store the operand

DefaultBranchProfile - the operand to store

indexOfDefaultBranchProfile

public static int indexOfDefaultBranchProfile(Instruction i)

Return the index of the operand called DefaultBranchProfile in the argument instruction.

Parameters:

i - the instruction to access.

Returns:

the index of the operand called DefaultBranchProfile in the argument instruction

hasDefaultBranchProfile

public static boolean hasDefaultBranchProfile(Instruction i)

Does the argument instruction have a non-null operand named DefaultBranchProfile?

Parameters:

i - the instruction to access.

Returns:

true if the instruction has an non-null operand named DefaultBranchProfile or false if it does not.

getMatch

public static IntConstantOperand getMatch(Instruction i,
                                          int k)

Get the k'th operand called Match from the argument instruction. Note that the returned operand will still point to its containing instruction.

Parameters:

i - the instruction to fetch the operand from

k - the index of the operand

Returns:

the k'th operand called Match

getClearMatch

public static IntConstantOperand getClearMatch(Instruction i,
                                               int k)

Get the k'th operand called Match from the argument instruction clearing its instruction pointer. The returned operand will not point to any containing instruction.

Parameters:

i - the instruction to fetch the operand from

k - the index of the operand

Returns:

the k'th operand called Match

setMatch

public static void setMatch(Instruction i,
                            int k,
                            IntConstantOperand o)

Set the k'th operand called Match in the argument instruction to the argument operand. The operand will now point to the argument instruction as its containing instruction.

Parameters:

i - the instruction in which to store the operand

k - the index of the operand

o - the operand to store

indexOfMatch

public static int indexOfMatch(Instruction i,
                               int k)

Return the index of the k'th operand called Match in the argument instruction.

Parameters:

i - the instruction to access.

k - the index of the operand.

Returns:

the index of the k'th operand called Match in the argument instruction

hasMatch

public static boolean hasMatch(Instruction i,
                               int k)

Does the argument instruction have a non-null k'th operand named Match?

Parameters:

i - the instruction to access.

k - the index of the operand.

Returns:

true if the instruction has an non-null k'th operand named Match or false if it does not.

indexOfMatches

public static int indexOfMatches(Instruction i)

Return the index of the first operand called Matches in the argument instruction.

Parameters:

i - the instruction to access.

Returns:

the index of the first operand called Matches in the argument instruction

hasMatches

public static boolean hasMatches(Instruction i)

Does the argument instruction have any Matches operands?

Parameters:

i - the instruction to access.

Returns:

true if the instruction has Matches operands or false if it does not.

getNumberOfMatches

public static int getNumberOfMatches(Instruction i)

How many variable-length operands called Matches does the argument instruction have?

Parameters:

i - the instruction to access

Returns:

the number of Matches operands the instruction has

resizeNumberOfMatches

public static void resizeNumberOfMatches(Instruction i,
                                         int numVarOps)

Change the number of Matches operands that may be stored in the argument instruction to numVarOps.

Parameters:

i - the instruction to access

numVarOps - the new number of variable operands called Matches that may be stored in the instruction

getTarget

public static BranchOperand getTarget(Instruction i,
                                      int k)

Get the k'th operand called Target from the argument instruction. Note that the returned operand will still point to its containing instruction.

Parameters:

i - the instruction to fetch the operand from

k - the index of the operand

Returns:

the k'th operand called Target

getClearTarget

public static BranchOperand getClearTarget(Instruction i,
                                           int k)

Get the k'th operand called Target from the argument instruction clearing its instruction pointer. The returned operand will not point to any containing instruction.

Parameters:

i - the instruction to fetch the operand from

k - the index of the operand

Returns:

the k'th operand called Target

setTarget

public static void setTarget(Instruction i,
                             int k,
                             BranchOperand o)

Set the k'th operand called Target in the argument instruction to the argument operand. The operand will now point to the argument instruction as its containing instruction.

Parameters:

i - the instruction in which to store the operand

k - the index of the operand

o - the operand to store

indexOfTarget

public static int indexOfTarget(Instruction i,
                                int k)

Return the index of the k'th operand called Target in the argument instruction.

Parameters:

i - the instruction to access.

k - the index of the operand.

Returns:

the index of the k'th operand called Target in the argument instruction

hasTarget

public static boolean hasTarget(Instruction i,
                                int k)

Does the argument instruction have a non-null k'th operand named Target?

Parameters:

i - the instruction to access.

k - the index of the operand.

Returns:

true if the instruction has an non-null k'th operand named Target or false if it does not.

indexOfTargets

public static int indexOfTargets(Instruction i)

Return the index of the first operand called Target in the argument instruction.

Parameters:

i - the instruction to access.

Returns:

the index of the first operand called Target in the argument instruction

hasTargets

public static boolean hasTargets(Instruction i)

Does the argument instruction have any operands named Target?

Parameters:

i - the instruction to access.

Returns:

true if the instruction has operands named Target or false if it does not.

getNumberOfTargets

public static int getNumberOfTargets(Instruction i)

How many variable-length operands called Targets does the argument instruction have?

Parameters:

i - the instruction to access

Returns:

the number of operands called Targets the instruction has

resizeNumberOfTargets

public static void resizeNumberOfTargets(Instruction i,
                                         int numVarOps)

Change the number of Targets that may be stored in the argument instruction to numVarOps.

Parameters:

i - the instruction to access

numVarOps - the new number of variable operands called Targets that may be stored in the instruction

getBranchProfile

public static BranchProfileOperand getBranchProfile(Instruction i,
                                                    int k)

Get the k'th operand called BranchProfile from the argument instruction. Note that the returned operand will still point to its containing instruction.

Parameters:

i - the instruction to fetch the operand from

k - the index of the operand

Returns:

the k'th operand called BranchProfile

getClearBranchProfile

public static BranchProfileOperand getClearBranchProfile(Instruction i,
                                                         int k)

Get the k'th operand called BranchProfile from the argument instruction clearing its instruction pointer. The returned operand will not point to any containing instruction.

Parameters:

i - the instruction to fetch the operand from

k - the index of the operand

Returns:

the k'th operand called BranchProfile

setBranchProfile

public static void setBranchProfile(Instruction i,
                                    int k,
                                    BranchProfileOperand o)

Set the k'th operand called BranchProfile in the argument instruction to the argument operand. The operand will now point to the argument instruction as its containing instruction.

Parameters:

i - the instruction in which to store the operand

k - the index of the operand

o - the operand to store

indexOfBranchProfile

public static int indexOfBranchProfile(Instruction i,
                                       int k)

Return the index of the k'th operand called BranchProfile in the argument instruction.

Parameters:

i - the instruction to access.

k - the index of the operand.

Returns:

the index of the k'th operand called BranchProfile in the argument instruction

hasBranchProfile

public static boolean hasBranchProfile(Instruction i,
                                       int k)

Does the argument instruction have a non-null k'th operand named BranchProfile?

Parameters:

i - the instruction to access.

k - the index of the operand.

Returns:

true if the instruction has an non-null k'th operand named BranchProfile or false if it does not.

indexOfBranchProfiles

public static int indexOfBranchProfiles(Instruction i)

Return the index of the first operand called BranchProfile in the argument instruction.

Parameters:

i - the instruction to access.

Returns:

the index of the first operand called BranchProfile in the argument instruction

hasBranchProfiles

public static boolean hasBranchProfiles(Instruction i)

Does the argument instruction have any operands named BranchProfile?

Parameters:

i - the instruction to access.

Returns:

true if the instruction has operands named BranchProfile or false if it does not.

getNumberOfBranchProfiles

public static int getNumberOfBranchProfiles(Instruction i)

How many variable-length operands called BranchProfiles does the argument instruction have?

Parameters:

i - the instruction to access

Returns:

the number of operands called BranchProfiles the instruction has

resizeNumberOfBranchProfiles

public static void resizeNumberOfBranchProfiles(Instruction i,
                                                int numVarOps)

Change the number of BranchProfiles that may be stored in the argument instruction to numVarOps.

Parameters:

i - the instruction to access

numVarOps - the new number of variable operands called BranchProfiles that may be stored in the instruction

create

public static Instruction create(Operator o,
                                 Operand Value,
                                 Operand Unknown1,
                                 Operand Unknown2,
                                 BranchOperand Default,
                                 BranchProfileOperand DefaultBranchProfile,
                                 int numVarOps)

Create an instruction of the LookupSwitch instruction format.

Parameters:

o - the instruction's operator

Value - the instruction's Value operand

Unknown1 - the instruction's Unknown1 operand

Unknown2 - the instruction's Unknown2 operand

Default - the instruction's Default operand

DefaultBranchProfile - the instruction's DefaultBranchProfile operand

numVarOps - the number of variable length operands that will be stored in the insruction.

Returns:

the newly created LookupSwitch instruction

mutate

public static Instruction mutate(Instruction i,
                                 Operator o,
                                 Operand Value,
                                 Operand Unknown1,
                                 Operand Unknown2,
                                 BranchOperand Default,
                                 BranchProfileOperand DefaultBranchProfile,
                                 int numVarOps)

Mutate the argument instruction into an instruction of the LookupSwitch instruction format having the specified operator and operands.

Parameters:

i - the instruction to mutate

o - the instruction's operator

Value - the instruction's Value operand

Unknown1 - the instruction's Unknown1 operand

Unknown2 - the instruction's Unknown2 operand

Default - the instruction's Default operand

DefaultBranchProfile - the instruction's DefaultBranchProfile operand

numVarOps - the number of variable length operands that will be stored in the instruction.

Returns:

the mutated instruction