[Bug target/114860] [14/15 regression] [aarch64] 511.povray regresses by ~5.5% with -O3 -flto -march=native -mcpu=neoverse-v2 since r14-10014-ga2f4be3dae04fa

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114860 Jakub Jelinek changed: What|Removed |Added Target Milestone|14.2|14.3 --- Comment #10 from Jakub Jelinek

[Bug target/114860] [14/15 regression] [aarch64] 511.povray regresses by ~5.5% with -O3 -flto -march=native -mcpu=neoverse-v2 since r14-10014-ga2f4be3dae04fa

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114860 --- Comment #9 from Tamar Christina --- (In reply to prathamesh3492 from comment #8) > Hi Tamar, > Using -falign-loops=5 indeed brings back the performance. > The adrp instruction has same address (0x4ae784) by setting -falign-loops=5 > (which r

[Bug target/114860] [14/15 regression] [aarch64] 511.povray regresses by ~5.5% with -O3 -flto -march=native -mcpu=neoverse-v2 since r14-10014-ga2f4be3dae04fa

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114860 --- Comment #8 from prathamesh3492 at gcc dot gnu.org --- Hi Tamar, Using -falign-loops=5 indeed brings back the performance. The adrp instruction has same address (0x4ae784) by setting -falign-loops=5 (which reduces misalignment to 4) with/witho

[Bug target/114860] [14/15 regression] [aarch64] 511.povray regresses by ~5.5% with -O3 -flto -march=native -mcpu=neoverse-v2 since r14-10014-ga2f4be3dae04fa

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114860 --- Comment #7 from Tamar Christina --- Yeah, it's most likely an alignment issue, especially as there's no code changes. We run our benchmarking with different flags so it may be why we don't see it. the loop seems misaligned, you can try incr

[Bug target/114860] [14/15 regression] [aarch64] 511.povray regresses by ~5.5% with -O3 -flto -march=native -mcpu=neoverse-v2 since r14-10014-ga2f4be3dae04fa

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114860 Richard Biener changed: What|Removed |Added Target Milestone|14.0|14.2 --- Comment #6 from Richard Biene

[Bug target/114860] [14/15 regression] [aarch64] 511.povray regresses by ~5.5% with -O3 -flto -march=native -mcpu=neoverse-v2 since r14-10014-ga2f4be3dae04fa

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114860 --- Comment #5 from Andrew Pinski --- (In reply to prathamesh3492 from comment #4) > To check for any > possible icache misses I used L1I_CACHE_REFILL counter, and turns out that > there are 64% more L1 icache misses for above adrp instruction w

[Bug target/114860] [14/15 regression] [aarch64] 511.povray regresses by ~5.5% with -O3 -flto -march=native -mcpu=neoverse-v2 since r14-10014-ga2f4be3dae04fa

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114860 --- Comment #4 from prathamesh3492 at gcc dot gnu.org --- Hi Tamar, Sorry for late response. perf profile for povray with LTO: Compiled with 82d6d385f97 (commit before a2f4be3dae0):

[Bug target/114860] [14/15 regression] [aarch64] 511.povray regresses by ~5.5% with -O3 -flto -march=native -mcpu=neoverse-v2 since r14-10014-ga2f4be3dae04fa

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114860 --- Comment #3 from Tamar Christina --- I cannot reproduce this even recompiling libc.

[Bug target/114860] [14/15 regression] [aarch64] 511.povray regresses by ~5.5% with -O3 -flto -march=native -mcpu=neoverse-v2 since r14-10014-ga2f4be3dae04fa

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114860 Tamar Christina changed: What|Removed |Added CC||tnfchris at gcc dot gnu.org --- Comme

[Bug target/114860] [14/15 regression] [aarch64] 511.povray regresses by ~5.5% with -O3 -flto -march=native -mcpu=neoverse-v2 since r14-10014-ga2f4be3dae04fa

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114860 --- Comment #1 from Tamar Christina --- Hmm I Am unable to reproduce this with -O3 - flto -mcpu=neoverse-v2 on a neoverse-v2 machine. Is any other option required? Also that code was new in gcc 14 and was partially reverted due to register al

[Bug target/114860] [14/15 regression] [aarch64] 511.povray regresses by ~5.5% with -O3 -flto -march=native -mcpu=neoverse-v2 since r14-10014-ga2f4be3dae04fa

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114860 Richard Biener changed: What|Removed |Added Target Milestone|--- |14.0