jminusminus

Class NLIRConditionalJump

java.lang.Object

jminusminus.NLIRInstruction

jminusminus.NLIRConditionalJump

 class NLIRConditionalJump
extends NLIRInstruction

LIR instruction representing an conditional jump instructions in JVM.

Field Summary

Fields

Modifier and Type	Field and Description
NBasicBlock	onFalseDestination Block to jump to on false.
NBasicBlock	onTrueDestination Block to jump to on true.
int	opcode Test expression opcode.

Fields inherited from class jminusminus.NLIRInstruction

block, id, lirMnemonic, reads, write

Constructor Summary

Constructors

Constructor and Description
NLIRConditionalJump(NBasicBlock block, int id, NLIRInstruction lhs, NLIRInstruction rhs, int opcode, NBasicBlock onTrueDestination, NBasicBlock onFalseDestination) Construct an NLIRConditionalJump instruction.

Method Summary

Methods

Modifier and Type	Method and Description
void	allocatePhysicalRegisters() Replace references to virtual registers in this LIR instruction with references to physical registers.
void	toSpim(PrintWriter out) Translate this LIR instruction into SPIM and write it out to the specified output stream.
String	toString() Return a string representation of this instruction.

Methods inherited from class java.lang.Object

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

Field Detail

opcode

public int opcode

Test expression opcode.

onTrueDestination

public NBasicBlock onTrueDestination

Block to jump to on true.

onFalseDestination

public NBasicBlock onFalseDestination

Block to jump to on false.

Constructor Detail

NLIRConditionalJump

public NLIRConditionalJump(NBasicBlock block,
                   int id,
                   NLIRInstruction lhs,
                   NLIRInstruction rhs,
                   int opcode,
                   NBasicBlock onTrueDestination,
                   NBasicBlock onFalseDestination)

Construct an NLIRConditionalJump instruction.

Parameters:

block - enclosing block.

id - identifier of the instruction.

lhs - lhs LIR.

rhs - rhs LIR.

opcode - opcode in the test.

onTrueDestination - block to jump to on true.

onFalseDestination - block to jump to on false.

Method Detail

allocatePhysicalRegisters

public void allocatePhysicalRegisters()

Description copied from class: NLIRInstruction

Replace references to virtual registers in this LIR instruction with references to physical registers.

Overrides:

allocatePhysicalRegisters in class NLIRInstruction

toSpim

public void toSpim(PrintWriter out)

Description copied from class: NLIRInstruction

Translate this LIR instruction into SPIM and write it out to the specified output stream.

Overrides:

toSpim in class NLIRInstruction

Parameters:

out - output stream for SPIM code.

toString

public String toString()

Description copied from class: NLIRInstruction

Return a string representation of this instruction.

Overrides:

toString in class NLIRInstruction

Returns:

string representation of this instruction.