com.oracle.graal.lir

Enum LIRInstruction.OperandFlag

java.lang.Object

java.lang.Enum<LIRInstruction.OperandFlag>

com.oracle.graal.lir.LIRInstruction.OperandFlag

All Implemented Interfaces:

Serializable, Comparable<LIRInstruction.OperandFlag>

Enclosing class:

LIRInstruction

public static enum LIRInstruction.OperandFlag
extends Enum<LIRInstruction.OperandFlag>

Flags for an operand.

Enum Constant Summary

Enum Constants

Enum Constant and Description
COMPOSITE The value can be a CompositeValue.
CONST The value can be a JavaConstant.
HINT The register allocator should try to assign a certain register to improve code quality.
ILLEGAL The value can be Value.ILLEGAL.
REG The value can be a RegisterValue.
STACK The value can be a StackSlot.
UNINITIALIZED The value can be uninitialized, e.g., a stack slot that has not written to before.

Method Summary

Modifier and Type	Method and Description
static LIRInstruction.OperandFlag	valueOf(String name) Returns the enum constant of this type with the specified name.
static LIRInstruction.OperandFlag[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

REG

public static final LIRInstruction.OperandFlag REG

The value can be a RegisterValue.

STACK

public static final LIRInstruction.OperandFlag STACK

The value can be a StackSlot.

COMPOSITE

public static final LIRInstruction.OperandFlag COMPOSITE

The value can be a CompositeValue.

CONST

public static final LIRInstruction.OperandFlag CONST

The value can be a JavaConstant.

ILLEGAL

public static final LIRInstruction.OperandFlag ILLEGAL

The value can be Value.ILLEGAL.

HINT

public static final LIRInstruction.OperandFlag HINT

The register allocator should try to assign a certain register to improve code quality. Use LIRInstruction.forEachRegisterHint(jdk.internal.jvmci.meta.Value, com.oracle.graal.lir.LIRInstruction.OperandMode, com.oracle.graal.lir.InstructionValueProcedure) to access the register hints.

UNINITIALIZED

public static final LIRInstruction.OperandFlag UNINITIALIZED

The value can be uninitialized, e.g., a stack slot that has not written to before. This is only used to avoid false positives in verification code.

Method Detail

values

public static LIRInstruction.OperandFlag[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (LIRInstruction.OperandFlag c : LIRInstruction.OperandFlag.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static LIRInstruction.OperandFlag valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null