TrapCodeOperand (Jikes RVM API)

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org.jikesrvm.compilers.opt.ir.operand
Class TrapCodeOperand

java.lang.Object
  org.jikesrvm.compilers.opt.ir.operand.Operand
      org.jikesrvm.compilers.opt.ir.operand.TrapCodeOperand

public final class TrapCodeOperand
extends Operand
extends Operand

Encode the semantic reason for a trap instruction.

See Also:: Operand

Field Summary
`private byte`	`trapCode` The trap code.

Fields inherited from class org.jikesrvm.compilers.opt.ir.operand.Operand
`instruction`

Constructor Summary
`private`	`TrapCodeOperand(byte why)` Create a trap code operand

Method Summary
`static TrapCodeOperand`	`ArrayBounds()` Create a trap code operand for an array bounds check
`static TrapCodeOperand`	`CheckCast()` Create a trap code operand for a check cast
`Operand`	`copy()` Return a new operand that is semantically equivalent to `this`.
`static TrapCodeOperand`	`DivByZero()` Create a trap code operand for a divide by zero check
`int`	`getTrapCode()` Return the numeric value representing the trap code; this is used by the assembler (on Intel) when generating code.
`boolean`	`isArrayBounds()` Does the operand represent an array bounds check ?
`boolean`	`isCheckCast()` Does the operand represent a check cast?
`boolean`	`isDivByZero()` Does the operand represent a divide by zero check?
`boolean`	`isDoesImplement()` Does the operand represent a must implement trap?
`boolean`	`isNullPtr()` Does the operand represent a null pointer check?
`boolean`	`isRegenerate()` Does the operand represent a regeneration trap?
`boolean`	`isStackOverflow()` Does the operand represent a stack overflow check?
`boolean`	`isStoreCheck()` Does the operand represent an array store check?
`static TrapCodeOperand`	`MustImplement()` Create a trap code operand for a must implement
`static TrapCodeOperand`	`NullPtr()` Create a trap code operand for a null pointer check
`static TrapCodeOperand`	`Regenerate()` Create a trap code operand for a regeneration trap
`boolean`	`similar(Operand op)` Are two operands semantically equivalent?
`static TrapCodeOperand`	`StackOverflow()` Create a trap code operand for a stack overflow
`static TrapCodeOperand`	`StoreCheck()` Create a trap code operand for a must implement
`String`	`toString()` Returns the string representation of this operand.

Methods inherited from class org.jikesrvm.compilers.opt.ir.operand.Operand
asAddressConstant, asBlock, asBranch, asClassConstant, asCondition, asDoubleConstant, asFloatConstant, asIntConstant, asLocation, asLongConstant, asMemory, asMethod, asNullConstant, asObjectConstant, asRegister, asStackLocation, asStringConstant, asTIBConstant, asType, conservativelyApproximates, getIndexInInstruction, getType, isAddress, isAddressConstant, isBlock, isBranch, isClassConstant, isConstant, isDefinitelyNull, isDouble, isDoubleConstant, isFloat, isFloatConstant, isInt, isIntConstant, isIntLike, isLocation, isLong, isLongConstant, isMemory, isMethod, isMovableObjectConstant, isNullConstant, isObjectConstant, isRef, isRegister, isStackLocation, isStringConstant, isTIBConstant, isTrueGuard, isType, meet

Methods inherited from class org.jikesrvm.compilers.opt.ir.operand.Operand

asAddressConstant, asBlock, asBranch, asClassConstant, asCondition, asDoubleConstant, asFloatConstant, asIntConstant, asLocation, asLongConstant, asMemory, asMethod, asNullConstant, asObjectConstant, asRegister, asStackLocation, asStringConstant, asTIBConstant, asType, conservativelyApproximates, getIndexInInstruction, getType, isAddress, isAddressConstant, isBlock, isBranch, isClassConstant, isConstant, isDefinitelyNull, isDouble, isDoubleConstant, isFloat, isFloatConstant, isInt, isIntConstant, isIntLike, isLocation, isLong, isLongConstant, isMemory, isMethod, isMovableObjectConstant, isNullConstant, isObjectConstant, isRef, isRegister, isStackLocation, isStringConstant, isTIBConstant, isTrueGuard, isType, meet

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Field Detail

trapCode

private final byte trapCode

The trap code.

Constructor Detail

TrapCodeOperand

private TrapCodeOperand(byte why)

Create a trap code operand

Parameters:: why - the trap code

Method Detail

NullPtr

public static TrapCodeOperand NullPtr()

Create a trap code operand for a null pointer check

Returns:: the newly created trap code operand

ArrayBounds

public static TrapCodeOperand ArrayBounds()

Create a trap code operand for an array bounds check

Returns:: the newly created trap code operand

DivByZero

public static TrapCodeOperand DivByZero()

Create a trap code operand for a divide by zero check

Returns:: the newly created trap code operand

StackOverflow

public static TrapCodeOperand StackOverflow()

Create a trap code operand for a stack overflow

Returns:: the newly created trap code operand

CheckCast

public static TrapCodeOperand CheckCast()

Create a trap code operand for a check cast

Returns:: the newly created trap code operand

MustImplement

public static TrapCodeOperand MustImplement()

Create a trap code operand for a must implement

Returns:: the newly created trap code operand

StoreCheck

public static TrapCodeOperand StoreCheck()

Create a trap code operand for a must implement

Returns:: the newly created trap code operand

Regenerate

public static TrapCodeOperand Regenerate()

Create a trap code operand for a regeneration trap

Returns:: the newly created trap code operand

isNullPtr

public boolean isNullPtr()

Does the operand represent a null pointer check?

Returns:: true if it does and false if it does not

isArrayBounds

public boolean isArrayBounds()

Does the operand represent an array bounds check ?

Returns:: true if it does and false if it does not

isDivByZero

public boolean isDivByZero()

Does the operand represent a divide by zero check?

Returns:: true if it does and false if it does not

isStackOverflow

public boolean isStackOverflow()

Does the operand represent a stack overflow check?

Returns:: true if it does and false if it does not

isCheckCast

public boolean isCheckCast()

Does the operand represent a check cast?

Returns:: true if it does and false if it does not

isDoesImplement

public boolean isDoesImplement()

Does the operand represent a must implement trap?

Returns:: true if it does and false if it does not

isStoreCheck

public boolean isStoreCheck()

Does the operand represent an array store check?

Returns:: true if it does and false if it does not

isRegenerate

public boolean isRegenerate()

Does the operand represent a regeneration trap?

Returns:: true if it does and false if it does not

copy

public Operand copy()

Description copied from class: Operand

Return a new operand that is semantically equivalent to this.

Specified by:: copy in class Operand

Returns:: a copy of this

similar

public boolean similar(Operand op)