PR rtl-optimization/47925: deleting trivially live instructions

[Richard Guenther]

On Tue, Mar 1, 2011 at 12:29 AM, Eric Botcazou <ebotcazou@adacore.com> wrote:
>> The bug showed up as a wrong-code regression in a modified version of Qt,
>> but I haven't yet found a testcase that fails with 4.6 but passes with
>> an older GCC.  Is the patch OK now regardless, or should it wait for 4.7?
>
> Fine for 4.6 with me, but I think you also need an ack from a RM.

Ok with me.

Richard.

>>       PR rtl-optimization/47925
>>       * cse.c (count_reg_usage): Don't ignore the SET_DEST of instructions
>>       with side effects.  Remove the more-specific check for volatile asms.
>
> OK if you adjust the head comment of the function.
>
> --
> Eric Botcazou
>