com.oracle.truffle.js.nodes.access.FrameSlotNode Maven / Gradle / Ivy
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package com.oracle.truffle.js.nodes.access;
import com.oracle.truffle.api.CompilerAsserts;
import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
import com.oracle.truffle.api.frame.Frame;
import com.oracle.truffle.api.frame.FrameDescriptor;
import com.oracle.truffle.api.frame.FrameSlotKind;
import com.oracle.truffle.js.nodes.JavaScriptNode;
public abstract class FrameSlotNode extends JavaScriptNode {
protected final int slot;
protected final Object identifier;
protected FrameSlotNode(int slot, Object identifier) {
this.slot = slot;
this.identifier = identifier;
}
public final int getSlotIndex() {
return slot;
}
/**
* @return the identifier corresponding to this slot
*/
public final Object getIdentifier() {
return identifier;
}
public abstract ScopeFrameNode getLevelFrameNode();
public boolean hasTemporalDeadZone() {
return false;
}
protected final boolean isIllegal(Frame frame) {
return frame.getTag(slot) == FrameSlotKind.Illegal.tag;
}
public abstract static class WithDescriptor extends FrameSlotNode {
@CompilationFinal private FrameDescriptor frameDescriptor;
protected WithDescriptor(int slot, Object identifier) {
super(slot, identifier);
}
protected final boolean isBooleanKind(Frame frame) {
return isOrSetKind(frame, FrameSlotKind.Boolean);
}
protected final boolean isIntegerKind(Frame frame) {
return isOrSetKind(frame, FrameSlotKind.Int);
}
protected final boolean isDoubleKind(Frame frame) {
return isOrSetKind(frame, FrameSlotKind.Double);
}
protected final boolean isLongKind(Frame frame) {
return isOrSetKind(frame, FrameSlotKind.Long);
}
protected final boolean isIntegerKind(Frame frame, FrameSlotKind currentKind) {
return isOrSetKind(frame, currentKind, FrameSlotKind.Int);
}
protected final boolean isDoubleKind(Frame frame, FrameSlotKind currentKind) {
return isOrSetKind(frame, currentKind, FrameSlotKind.Double);
}
protected final boolean isLongKind(Frame frame, FrameSlotKind currentKind) {
return isOrSetKind(frame, currentKind, FrameSlotKind.Long);
}
protected final void ensureObjectKind(Frame frame) {
FrameDescriptor desc = getFrameDescriptor(frame);
if (desc.getSlotKind(slot) != FrameSlotKind.Object) {
CompilerDirectives.transferToInterpreterAndInvalidate();
desc.setSlotKind(slot, FrameSlotKind.Object);
}
}
private boolean isOrSetKind(Frame frame, FrameSlotKind targetKind) {
FrameDescriptor desc = getFrameDescriptor(frame);
FrameSlotKind currentKind = desc.getSlotKind(slot);
return isOrSetKind(frame, desc, currentKind, targetKind);
}
private boolean isOrSetKind(Frame frame, FrameSlotKind currentKind, FrameSlotKind targetKind) {
FrameDescriptor desc = getFrameDescriptor(frame);
return isOrSetKind(frame, desc, currentKind, targetKind);
}
private boolean isOrSetKind(Frame frame, FrameDescriptor desc, FrameSlotKind currentKind, FrameSlotKind targetKind) {
assert desc == frame.getFrameDescriptor();
if (currentKind == targetKind) {
return true;
} else if (currentKind == FrameSlotKind.Illegal) {
CompilerDirectives.transferToInterpreterAndInvalidate();
desc.setSlotKind(slot, targetKind);
return true;
} else {
if (targetKind == FrameSlotKind.Double) {
if (currentKind == FrameSlotKind.Int || currentKind == FrameSlotKind.Long) {
CompilerDirectives.transferToInterpreterAndInvalidate();
desc.setSlotKind(slot, FrameSlotKind.Double);
return true;
}
} else if (targetKind == FrameSlotKind.Long) {
if (currentKind == FrameSlotKind.Int) {
CompilerDirectives.transferToInterpreterAndInvalidate();
desc.setSlotKind(slot, FrameSlotKind.Long);
return true;
}
}
return false;
}
}
protected final FrameDescriptor getFrameDescriptor(Frame frame) {
FrameDescriptor constantFrameDescriptor = frameDescriptor;
if (constantFrameDescriptor == null) {
CompilerDirectives.transferToInterpreterAndInvalidate();
frameDescriptor = constantFrameDescriptor = frame.getFrameDescriptor();
}
assert constantFrameDescriptor == frame.getFrameDescriptor();
CompilerAsserts.partialEvaluationConstant(constantFrameDescriptor);
return constantFrameDescriptor;
}
}
}
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