org.jruby.ir.instructions.BEQInstr Maven / Gradle / Ivy
package org.jruby.ir.instructions;
import org.jruby.ir.IRVisitor;
import org.jruby.ir.Operation;
import org.jruby.ir.operands.Boolean;
import org.jruby.ir.operands.*;
import org.jruby.ir.persistence.IRReaderDecoder;
import org.jruby.ir.transformations.inlining.CloneInfo;
import org.jruby.parser.StaticScope;
import org.jruby.runtime.DynamicScope;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
public class BEQInstr extends TwoOperandBranchInstr implements FixedArityInstr {
public static Instr create(Operand v1, Operand v2, Label jmpTarget) {
if (v2 instanceof Boolean) {
Boolean lhs = (Boolean) v2;
if (lhs.isTrue()) {
if (v1 instanceof Boolean) {
if (((Boolean) v1).isTrue()) { // true == true -> just jump
return new JumpInstr(jmpTarget);
} else { // false == true (this will never jump)
return NopInstr.NOP;
}
} else {
return new BTrueInstr(jmpTarget, v1);
}
} else if (lhs.isFalse()) {
if (v1 instanceof Boolean) {
if (((Boolean) v1).isFalse()) { // false == false -> just jump
return new JumpInstr(jmpTarget);
} else { // true == false (this will never jump)
return NopInstr.NOP;
}
} else {
return new BFalseInstr(jmpTarget, v1);
}
}
} else if (v2 instanceof Nil) {
if (v1 instanceof Nil) { // nil == nil -> just jump
return new JumpInstr(jmpTarget);
} else {
return new BNilInstr(jmpTarget, v1);
}
}
if (v2 == UndefinedValue.UNDEFINED) {
if (v1 == UndefinedValue.UNDEFINED) {
return new JumpInstr(jmpTarget);
} else {
return new BUndefInstr(jmpTarget, v1);
}
}
return new BEQInstr(jmpTarget, v1, v2);
}
protected BEQInstr(Label jumpTarget, Operand v1, Operand v2) {
super(Operation.BEQ, jumpTarget, v1, v2);
}
@Override
public Instr clone(CloneInfo ii) {
return new BEQInstr(ii.getRenamedLabel(getJumpTarget()), getArg1().cloneForInlining(ii), getArg2().cloneForInlining(ii));
}
public static BEQInstr decode(IRReaderDecoder d) {
return new BEQInstr(d.decodeLabel(), d.decodeOperand(), d.decodeOperand());
}
@Override
public int interpretAndGetNewIPC(ThreadContext context, DynamicScope currDynScope, StaticScope currScope, IRubyObject self, Object[] temp, int ipc) {
Object value1 = getArg1().retrieve(context, self, currScope, currDynScope, temp);
Object value2 = getArg2().retrieve(context, self, currScope, currDynScope, temp);
return ((IRubyObject) value1).op_equal(context, (IRubyObject)value2).isTrue() ? getJumpTarget().getTargetPC() : ipc;
}
@Override
public void visit(IRVisitor visitor) {
visitor.BEQInstr(this);
}
}
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