org.jruby.ir.instructions.ArrayDerefInstr Maven / Gradle / Ivy
package org.jruby.ir.instructions;
import org.jruby.RubyInstanceConfig;
import org.jruby.RubyString;
import org.jruby.ir.IRScope;
import org.jruby.ir.IRVisitor;
import org.jruby.ir.Operation;
import org.jruby.ir.instructions.specialized.OneOperandArgNoBlockCallInstr;
import org.jruby.ir.operands.FrozenString;
import org.jruby.ir.operands.Operand;
import org.jruby.ir.operands.Variable;
import org.jruby.ir.persistence.IRReaderDecoder;
import org.jruby.ir.persistence.IRWriterEncoder;
import org.jruby.ir.runtime.IRRuntimeHelpers;
import org.jruby.ir.transformations.inlining.CloneInfo;
import org.jruby.parser.StaticScope;
import org.jruby.runtime.CallType;
import org.jruby.runtime.DynamicScope;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
/**
* Instruction representing Ruby code of the form: "a['str']"
* which is equivalent to: a.[]('str'). Because a Hash receiver
* would immediately freeze the string, we can freeze and dedup
* the string ahead of time and call [] directly.
*/
public class ArrayDerefInstr extends OneOperandArgNoBlockCallInstr {
private final FrozenString key;
public static ArrayDerefInstr create(Variable result, Operand obj, FrozenString arg0) {
return new ArrayDerefInstr(result, obj, arg0);
}
public ArrayDerefInstr(Variable result, Operand obj, FrozenString arg0) {
super(Operation.ARRAY_DEREF, CallType.FUNCTIONAL, result, "[]", obj, new Operand[] {arg0}, false);
key = arg0;
}
@Override
public Instr clone(CloneInfo ii) {
return new ArrayDerefInstr((Variable) getResult().cloneForInlining(ii), getReceiver().cloneForInlining(ii), key);
}
@Override
public void encode(IRWriterEncoder e) {
if (RubyInstanceConfig.IR_WRITING_DEBUG) System.out.println("Instr(" + getOperation() + "): " + this);
e.encode(getOperation());
e.encode(getResult());
e.encode(getReceiver());
e.encode(getArg1());
}
public static ArrayDerefInstr decode(IRReaderDecoder d) {
return create(d.decodeVariable(), d.decodeOperand(), (FrozenString) d.decodeOperand());
}
@Override
public Object interpret(ThreadContext context, StaticScope currScope, DynamicScope dynamicScope, IRubyObject self, Object[] temp) {
IRubyObject object = (IRubyObject) getReceiver().retrieve(context, self, currScope, dynamicScope, temp);
RubyString keyStr = (RubyString) key.retrieve(context, self, currScope, dynamicScope, temp);
return IRRuntimeHelpers.callOptimizedAref(context, self, object, keyStr, getCallSite());
}
@Override
public void visit(IRVisitor visitor) {
visitor.ArrayDerefInstr(this);
}
public FrozenString getKey() {
return key;
}
}
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