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package jdk.vm.ci.meta;

Represents the type of values. This class can be extended by compilers to track additional information about values.
/** * Represents the type of {@link Value values}. This class can be extended by compilers to track * additional information about values. */
public abstract class ValueKind<K extends ValueKind<K>> { private enum IllegalKind implements PlatformKind { ILLEGAL; private final EnumKey<IllegalKind> key = new EnumKey<>(this); public Key getKey() { return key; } public int getSizeInBytes() { return 0; } public int getVectorLength() { return 0; } public char getTypeChar() { return '-'; } } private static class IllegalValueKind extends ValueKind<IllegalValueKind> { IllegalValueKind() { super(IllegalKind.ILLEGAL); } @Override public IllegalValueKind changeType(PlatformKind newPlatformKind) { return this; } @Override public String toString() { return "ILLEGAL"; } }
The non-type.
/** * The non-type. */
public static final ValueKind<?> Illegal = new IllegalValueKind(); private final PlatformKind platformKind; public ValueKind(PlatformKind platformKind) { this.platformKind = platformKind; } public final PlatformKind getPlatformKind() { return platformKind; }
Create a new ValueKind with a different PlatformKind. Subclasses must override this to preserve the additional information added by the compiler.
/** * Create a new {@link ValueKind} with a different {@link PlatformKind}. Subclasses must * override this to preserve the additional information added by the compiler. */
public abstract K changeType(PlatformKind newPlatformKind);
Returns a String representation of the kind, which will be included at the end of Object.toString() implementation. Defaults to Object.toString() but can be overridden to provide something more specific.
/** * Returns a String representation of the kind, which will be included at the end of * {@link Value#toString()} implementation. Defaults to {@link #toString()} but can be * overridden to provide something more specific. */
public String getKindSuffix() { return toString(); } }