[LLVMdev] Inline asm bug?

[Eli Friedman]

On Tue, Jan 8, 2013 at 2:28 PM, Krzysztof Parzyszek
<kparzysz at codeaurora.org> wrote:
> On 1/8/2013 4:24 PM, Eli Friedman wrote:
>>
>>
>> It's kind of weird... inline asm hooks into the compiler at a low
>> level, so think of it this way: alias analysis queries the "memory"
>> clobber, but dead code elimination ignores the clobber list.  You're
>> right, this makes absolutely no sense from the user's perspective.
>
>
> Ok, this sheds some light on it.
>
> Given that the "memory" clobber in the original example had no effect, I am
> assuming that this is indeed a bug.  Am I correct?  The problem there is
> that the load from G has been lost during translation to MI, so I'm assuming
> that this is something that the clobber should have prevented.

Yes, I believe so.

-Eli