// - Stack split code (optional)
	// - PUSHQ	BP
	// - MOVQ	SP,	BP
	//
	// If the prologue layout change, the unwind information should be updated
	// accordingly.

	// Search for the PUSHQ BP instruction inside the prologue.
	var pushbp *obj.Prog
	for p := s.Func().Text; p != nil; p = p.Link {
		if p.As == APUSHQ && p.From.Type == obj.TYPE_REG && p.From.Reg == REG_BP {
			pushbp = p
			break
		}

	// This is only an escape hatch for a lack of complete mapping of "Input changed -> Output changed".
	// WDS does not suffer this limitation, so we could almost safely ignore these.
	// However, other code will merge "Partial push + Full push -> Full push", so skipping full pushes isn't viable.