Messages in this thread | | | From | Andi Kleen <> | Subject | Re: gcc 4.5.1 / as 2.20.51.0.11 miscompiling drivers/char/i8k.c ? | Date | Mon, 08 Nov 2010 12:20:02 +0100 |
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Richard Guenther <richard.guenther@gmail.com> writes:
> On Mon, Nov 8, 2010 at 12:03 AM, Andi Kleen <andi@firstfloor.org> wrote: >> Andreas Schwab <schwab@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.
That's a separate problem.
> Btw, I can't see a testcase anywhere so I just assume Andreas got > it right as usual.
An asm with live inputs and outputs should never be optimized way. If 4.5.1 started doing that it's seriously broken.
-Andi
-- ak@linux.intel.com -- Speaking for myself only.
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