// rewrite mem for each call,
	// rewrite each OpSelectNAddr.
	for _, b := range f.Blocks {
		for _, v := range b.Values {
			switch v.Op {
			case OpInitMem:
				m0 = v

			case OpClosureLECall, OpInterLECall, OpStaticLECall, OpTailLECall:
				calls = append(calls, v)

			case OpArg:
				args = append(args, v)

			case OpStore:
				if a := v.Args[1]; a.Op == OpSelectN && !CanSSA(a.Type) {
					if a.Uses > 1 {