public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
* [Bug tree-optimization/90304] -O3 vectorization gets worse when code is moved into main() [not found] <bug-90304-4@http.gcc.gnu.org/bugzilla/> @ 2021-07-22 21:46 ` pinskia at gcc dot gnu.org 2021-07-22 21:48 ` [Bug tree-optimization/90304] -O3 vectorization gets worse when code is inlined pinskia at gcc dot gnu.org 1 sibling, 0 replies; 2+ messages in thread From: pinskia at gcc dot gnu.org @ 2021-07-22 21:46 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90304 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Severity|normal |enhancement ^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug tree-optimization/90304] -O3 vectorization gets worse when code is inlined [not found] <bug-90304-4@http.gcc.gnu.org/bugzilla/> 2021-07-22 21:46 ` [Bug tree-optimization/90304] -O3 vectorization gets worse when code is moved into main() pinskia at gcc dot gnu.org @ 2021-07-22 21:48 ` pinskia at gcc dot gnu.org 1 sibling, 0 replies; 2+ messages in thread From: pinskia at gcc dot gnu.org @ 2021-07-22 21:48 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90304 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|-O3 vectorization gets |-O3 vectorization gets |worse when code is moved |worse when code is inlined |into main() | Keywords| |alias --- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Testcase: int* ptr(); int f() { int*__restrict result = ptr(); int* first = ptr(); int* second = ptr(); for (int i = 0; i < 1024; ++i) result[i] = first[i] * second[i]; } __attribute__((noinline)) void func(int*__restrict result, int* first, int* second) { for (int i = 0; i < 1024; ++i) result[i] = first[i] * second[i]; } int g() { func(ptr(), ptr(), ptr()); } Notice func is vectorized while f is not. ^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2021-07-22 21:48 UTC | newest] Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- [not found] <bug-90304-4@http.gcc.gnu.org/bugzilla/> 2021-07-22 21:46 ` [Bug tree-optimization/90304] -O3 vectorization gets worse when code is moved into main() pinskia at gcc dot gnu.org 2021-07-22 21:48 ` [Bug tree-optimization/90304] -O3 vectorization gets worse when code is inlined pinskia at gcc dot gnu.org
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).