org.jikesrvm.compilers.opt.ir

Class Nullary

java.lang.Object

org.jikesrvm.compilers.opt.ir.InstructionFormat

org.jikesrvm.compilers.opt.ir.Nullary

public final class Nullary
extends InstructionFormat

The Nullary 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
Nullary()

Method Summary

Modifier and Type	Method and Description
static boolean	conforms(Instruction i) InstructionFormat identification method for Nullary.
static boolean	conforms(Operator o) InstructionFormat identification method for Nullary.
static Instruction	create(Operator o, RegisterOperand Result) Create an instruction of the Nullary instruction format.
static RegisterOperand	getClearResult(Instruction i) Get the operand called Result from the argument instruction clearing its instruction pointer.
static RegisterOperand	getResult(Instruction i) Get the operand called Result from the argument instruction.
static boolean	hasResult(Instruction i) Does the argument instruction have a non-null operand named Result?
static int	indexOfResult(Instruction i) Return the index of the operand called Result in the argument instruction.
static Instruction	mutate(Instruction i, Operator o, RegisterOperand Result) Mutate the argument instruction into an instruction of the Nullary instruction format having the specified operator and operands.
static void	setResult(Instruction i, RegisterOperand Result) Set the operand called Result 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

Nullary

public Nullary()

Method Detail

conforms

public static boolean conforms(Instruction i)

InstructionFormat identification method for Nullary.

Parameters:

i - an instruction

Returns:

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

conforms

public static boolean conforms(Operator o)

InstructionFormat identification method for Nullary.

Parameters:

o - an instruction

Returns:

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

getResult

public static RegisterOperand getResult(Instruction i)

Get the operand called Result 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 Result

getClearResult

public static RegisterOperand getClearResult(Instruction i)

Get the operand called Result 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 Result

setResult

public static void setResult(Instruction i,
                             RegisterOperand Result)

Set the operand called Result 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

Result - the operand to store

indexOfResult

public static int indexOfResult(Instruction i)

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

Parameters:

i - the instruction to access.

Returns:

the index of the operand called Result in the argument instruction

hasResult

public static boolean hasResult(Instruction i)

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

Parameters:

i - the instruction to access.

Returns:

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

create

public static Instruction create(Operator o,
                                 RegisterOperand Result)

Create an instruction of the Nullary instruction format.

Parameters:

o - the instruction's operator

Result - the instruction's Result operand

Returns:

the newly created Nullary instruction

mutate

public static Instruction mutate(Instruction i,
                                 Operator o,
                                 RegisterOperand Result)

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

Parameters:

i - the instruction to mutate

o - the instruction's operator

Result - the instruction's Result operand

Returns:

the mutated instruction