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

2020-12-07 Thread hubicka at gcc dot gnu.org via Gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98173 Jan Hubicka changed: What|Removed |Added Keywords|missed-optimization | Version|11.0

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

2020-12-07 Thread hubicka at ucw dot cz via Gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98173 --- Comment #2 from Jan Hubicka --- > 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

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

2020-12-07 Thread rguenth at gcc dot gnu.org via Gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98173 Richard Biener changed: What|Removed |Added Version|unknown |11.0 Keywords|