On 18/11/16 13:41, Aleksey Shipilev wrote: > *) I don't quite get the NoSp change. The change now allows some > operands to take SP. Was it an overlook, or AArch64 really has some > constraints about this? If they're inputs it really doesn't matter. For ourputs it's essential or C2 will put them in the thread register or somesuch. Andrew.