return v
	}

	// Make a pass through the entry block looking for
	// OpArg{Int,Float}Reg ops. Record the slots they use in a table
	// ("sc"). We use a type-insensitive lookup for the slot table,
	// since the type we get from the ABI analyzer won't always match
	// what the compiler uses when creating OpArg{Int,Float}Reg ops.
	for _, v := range f.Entry.Values {
		if v.Op == OpArgIntReg || v.Op == OpArgFloatReg {

		if p2.Op == OpAddr || p2.Op == OpLocalAddr || p2.Op == OpSP {
			return true
		}
		return (p2.Op == OpArg || p2.Op == OpArgIntReg) && p1.Args[0].Op == OpSP
	case OpArg, OpArgIntReg:
		if p2.Op == OpSP || p2.Op == OpLocalAddr {
			return true
		}
	case OpSP:
		return p2.Op == OpAddr || p2.Op == OpLocalAddr || p2.Op == OpArg || p2.Op == OpArgIntReg || p2.Op == OpSP
	}
	return false
}