On Mon, Nov 15, 2010 at 7:45 PM, Jeff Law <l...@redhat.com> wrote: > On 11/08/10 03:49, Richard Guenther wrote: >> >> On Mon, Nov 8, 2010 at 12:03 AM, Andi Kleen<a...@firstfloor.org> wrote: >>> >>> Andreas Schwab<sch...@linux-m68k.org> writes: >>>> >>>> The asm fails to mention that it modifies *regs. >>> >>> It has a memory clobber, that should be enough, no? >> >> No. A memory clobber does not cover automatic storage. > > A memory clobber should clobber anything in memory, including autos in > memory; if it doesn't, then that seems like a major problem. I'd like to > see the rationale behind not clobbering autos in memory.
Non-address taken automatic storage. (note that we don't excercise this in optimization yet) It's difficult to model thins kind of non-aliased memory with this kind of aliasing mechanism (apart from taking all asms as clobbering everything as we currently do). Richard. > Jeff >
