[Bug tree-optimization/119960] [15/16 Regression] vectorizer seems not to do as much any more since r15-5863

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119960 --- Comment #6 from Arseny Kapoulkine --- Thanks for the analysis! Just a note to make sure I didn't misunderstand this, are you saying you see gcc 15 vectorizing the stores when using znver4 tuning? I tried this and it did not do that; using ei

[Bug tree-optimization/119960] [15/16 Regression] vectorizer seems not to do as much any more since r15-5863

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119960 --- Comment #5 from Arseny Kapoulkine --- Thanks for the analysis! Just a note to make sure I didn't misunderstand this, are you saying you see gcc 15 vectorizing the stores when using znver4 tuning? I tried this and it did not do that; using ei

[Bug tree-optimization/119960] [15/16 Regression] vectorizer seems not to do as much any more since r15-5863

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119960 --- Comment #3 from Arseny Kapoulkine --- Created attachment 61209 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=61209&action=edit preprocessed source

[Bug tree-optimization/119960] Regression of code generation

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119960 --- Comment #1 from Arseny Kapoulkine --- Here's what I think is happening: - The C code hot path is, on every iteration, reading a pair of integers from `edgefifo`, decoding a triangle and writing two new pairs of integers to `edgefifo`. It's

[Bug tree-optimization/119960] New: Regression of code generation

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119960 Bug ID: 119960 Summary: Regression of code generation Product: gcc Version: 15.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization

[Bug rtl-optimization/118550] New: Missed optimization for fusing two byte loads with offsets

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118550 Bug ID: 118550 Summary: Missed optimization for fusing two byte loads with offsets Product: gcc Version: 15.0 Status: UNCONFIRMED Severity: normal Pr

[Bug middle-end/109849] suboptimal code for vector walking loop

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109849 --- Comment #41 from Arseny Kapoulkine --- Filed https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118493

[Bug libstdc++/118493] New: std::vector::insert regression in C++03: execution reaches an unreachable program point

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118493 Bug ID: 118493 Summary: std::vector::insert regression in C++03: execution reaches an unreachable program point Product: gcc Version: 14.0 Status: UNCONFIRMED

[Bug middle-end/109849] suboptimal code for vector walking loop

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109849 Arseny Kapoulkine changed: What|Removed |Added CC||arseny.kapoulkine at gmail dot com

[Bug tree-optimization/118279] gcc fails to eliminate unnecessary guards around switch()

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118279 --- Comment #4 from Arseny Kapoulkine --- Noted re: godbolt, sorry! Applying your suggested workaround seems to make the codegen worse? Adding [[assume(hoff >= 0 && hoff <= 2)]]; before the loop retains the guards for the interior jumps b

[Bug tree-optimization/118279] New: gcc fails to eliminate unnecessary guards around switch()

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118279 Bug ID: 118279 Summary: gcc fails to eliminate unnecessary guards around switch() Product: gcc Version: 14.1.1 Status: UNCONFIRMED Severity: normal P

[Bug tree-optimization/118145] New: Regression of code generation due to an overly eager vectorization attempt

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118145 Bug ID: 118145 Summary: Regression of code generation due to an overly eager vectorization attempt Product: gcc Version: 14.1.1 Status: UNCONFIRMED Severity: n