return op
}

// brrev returns reverse(op).
// For example, Brrev(<) is >.
func brrev(op ir.Op) ir.Op {
	switch op {
	case ir.OEQ:
		return ir.OEQ
	case ir.ONE:
		return ir.ONE
	case ir.OLT:
		return ir.OGT
	case ir.OGT:
		return ir.OLT
	case ir.OLE:
		return ir.OGE
	case ir.OGE:
		return ir.OLE
	}
	base.Fatalf("brrev: no rev for %v\n", op)
	return op
}

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