[Bug middle-end/107719] 14% regression on TSVC s3113 on znve4 compared to GCC 7.5

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107719

Richard Biener  changed:

   What|Removed |Added

 Resolution|--- |INVALID
 Status|UNCONFIRMED |RESOLVED

--- Comment #3 from Richard Biener  ---
I can't reproduce the difference in runtime.  I also think you're running into
a misaligned inner loop here.

[Bug middle-end/107719] 14% regression on TSVC s3113 on znve4 compared to GCC 7.5

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107719

Richard Biener  changed:

   What|Removed |Added

 Target||x86_64-*-*

--- Comment #2 from Richard Biener  ---
yep, probably not "real"

[Bug middle-end/107719] 14% regression on TSVC s3113 on znve4 compared to GCC 7.5

[amonakov at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107719

Alexander Monakov  changed:

   What|Removed |Added

 CC||amonakov at gcc dot gnu.org

--- Comment #1 from Alexander Monakov  ---
As you say, the inner loop is the same, and it iterates 32000 times. Most
likely it crosses an instruction fetch boundary differently, try
-falign-loops=32.