[PATCH 7/7] ix86: don't recognize/derive Q suffix in the common case

Jan Beulich jbeulich@suse.com
Thu Aug 18 06:29:59 GMT 2022


On 17.08.2022 22:36, H.J. Lu wrote:
> On Tue, Aug 16, 2022 at 12:34 AM Jan Beulich <jbeulich@suse.com> wrote:
>>
>> Have its use, except where actually legitimate, result in the same "only
>> supported in 64-bit mode" diagnostic as emitted for other 64-bit only
>> insns. Also suppress deriving of the suffix in Intel mode except in the
>> legitimate cases. This in exchange allows dropping the respective code
>> from match_template().
>>
>> Oddly enough despite gcc's preference towards FILDQ and FIST{,T}Q we
> 
> This is for inline assembly:
> 
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=39590

I don't think this is affecting inline assembly only. The Z operand modifier
is also used in i386.md. And the lack of testcase when gcc uses it (no
matter for what purpose) is odd in any event.

Jan


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