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* [Bug tree-optimization/116609] New: Live lane vectorization does not support SLP with loop masking
@ 2024-09-05 8:42 rguenth at gcc dot gnu.org
2024-09-06 7:16 ` [Bug tree-optimization/116609] " cvs-commit at gcc dot gnu.org
2024-09-06 7:18 ` rguenth at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: rguenth at gcc dot gnu.org @ 2024-09-05 8:42 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116609
Bug ID: 116609
Summary: Live lane vectorization does not support SLP with loop
masking
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
Target Milestone: ---
It should be trivial to support for single-lane SLP (testing a patch for that)
but also multi-lane might be supportable, for example using slide up/down
or easier when the number of lanes is power-of-two use a larger element
lastb extract.
In general when SLP discovery gets us multi-lanes and that fails we currently
scrap the respective SLP instance but we might want to split it up to a set
of single-lane instances (also avoiding re-discovery).
^ permalink raw reply [flat|nested] 3+ messages in thread* [Bug tree-optimization/116609] Live lane vectorization does not support SLP with loop masking 2024-09-05 8:42 [Bug tree-optimization/116609] New: Live lane vectorization does not support SLP with loop masking rguenth at gcc dot gnu.org @ 2024-09-06 7:16 ` cvs-commit at gcc dot gnu.org 2024-09-06 7:18 ` rguenth at gcc dot gnu.org 1 sibling, 0 replies; 3+ messages in thread From: cvs-commit at gcc dot gnu.org @ 2024-09-06 7:16 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116609 --- Comment #1 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Richard Biener <rguenth@gcc.gnu.org>: https://gcc.gnu.org/g:116bfbc806a7aa3f1ae2a3b3eb38d6bb65e0d0a7 commit r15-3506-g116bfbc806a7aa3f1ae2a3b3eb38d6bb65e0d0a7 Author: Richard Biener <rguenther@suse.de> Date: Thu Sep 5 10:46:58 2024 +0200 tree-optimization/116609 - SLP live lane vectorization with partial vectors The following implements the simple case of single-lane SLP when using partial vectors which can use the VEC_EXTRACT_LAST code generation without changes. I'll keep the PR open for further enhancements. This avoids FAILs of gcc.target/aarch64/sve/live_1.c when using single-lane SLP for non-grouped stores. PR tree-optimization/116609 * tree-vect-loop.cc (vectorizable_live_operation_1): Support partial vectors for single-lane SLP. ^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug tree-optimization/116609] Live lane vectorization does not support SLP with loop masking 2024-09-05 8:42 [Bug tree-optimization/116609] New: Live lane vectorization does not support SLP with loop masking rguenth at gcc dot gnu.org 2024-09-06 7:16 ` [Bug tree-optimization/116609] " cvs-commit at gcc dot gnu.org @ 2024-09-06 7:18 ` rguenth at gcc dot gnu.org 1 sibling, 0 replies; 3+ messages in thread From: rguenth at gcc dot gnu.org @ 2024-09-06 7:18 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116609 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Last reconfirmed| |2024-09-06 Ever confirmed|0 |1 Status|UNCONFIRMED |NEW --- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- It should now work for single-lane SLP when also using the SLP equivalent of ncopies == 1. Both is overly restrictive of course, so keeping open. ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2024-09-06 7:18 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2024-09-05 8:42 [Bug tree-optimization/116609] New: Live lane vectorization does not support SLP with loop masking rguenth at gcc dot gnu.org 2024-09-06 7:16 ` [Bug tree-optimization/116609] " cvs-commit at gcc dot gnu.org 2024-09-06 7:18 ` rguenth at gcc dot gnu.org
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