[Bug middle-end/98173] -fno-tree-pta improves tfft2 benchmark by 50% on zen and -march=natie.

[hubicka at ucw dot cz via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98173

--- Comment #2 from Jan Hubicka <hubicka at ucw dot cz> ---
> PTA certainly can increase register pressure by means of more disambiguations
> and thus more store-motion or PRE.  But you hardly can blame PTA for that ;)
It seems microarch specific, so it also can be just enabled
vectorization...