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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/113458] Missed SLP for reduction of multiplication/addition with promotion Date: Wed, 17 Jan 2024 21:08:49 +0000 [thread overview] Message-ID: <bug-113458-4-vFrimDlUzA@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-113458-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113458 --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- The loop based vectorizer is able to do a decent job at: ``` int f(short *a, signed char *b, int n) { int sum = 0; n = 8; for(int i = 0;i < n; i++) sum += a[i]*b[i]; return sum; } ``` But if we reduce n to 4, the loop based vectorizer is not able to handle it either.
next prev parent reply other threads:[~2024-01-17 21:08 UTC|newest] Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-01-17 20:29 [Bug tree-optimization/113458] New: " pinskia at gcc dot gnu.org 2024-01-17 21:08 ` pinskia at gcc dot gnu.org [this message] 2024-01-18 5:13 ` [Bug tree-optimization/113458] " liuhongt at gcc dot gnu.org 2024-01-18 8:05 ` rguenth at gcc dot gnu.org 2024-01-18 8:10 ` rguenth at gcc dot gnu.org 2024-01-18 8:36 ` [Bug target/113458] " pinskia at gcc dot gnu.org 2024-01-19 0:33 ` liuhongt at gcc dot gnu.org 2024-01-19 21:41 ` pinskia at gcc dot gnu.org 2024-01-19 22:56 ` pinskia at gcc dot gnu.org 2024-01-20 0:41 ` pinskia at gcc dot gnu.org 2024-01-20 8:09 ` pinskia at gcc dot gnu.org 2024-01-21 22:14 ` pinskia at gcc dot gnu.org
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