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* [Bug tree-optimization/114166] New: word_mode vectorization still relies on vector lowering
@ 2024-02-29 11:43 rguenth at gcc dot gnu.org
2024-02-29 11:44 ` [Bug tree-optimization/114166] " rguenth at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: rguenth at gcc dot gnu.org @ 2024-02-29 11:43 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114166
Bug ID: 114166
Summary: word_mode vectorization still relies on vector
lowering
Product: gcc
Version: 14.0
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: ---
When the vectorizer decides to use emulated vectors for operations the target
doesn't support and the vector types do not have integer mode but the
vectorizer simply emits vector code nevertheless which it does for
bitwise operations, we fail RTL expansion.
This can be seen with g++.dg/opt/pr82929.C when moving vector lowering
before vectorization. We then vectorize V1SImode bitwise and even
though the optab check discovered that's not supported.
Vectorizer code generation should, like it now does for PLUS/MINUS and NEGATE,
use integer types when code generating emulated vectors.
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug tree-optimization/114166] word_mode vectorization still relies on vector lowering 2024-02-29 11:43 [Bug tree-optimization/114166] New: word_mode vectorization still relies on vector lowering rguenth at gcc dot gnu.org @ 2024-02-29 11:44 ` rguenth at gcc dot gnu.org 2024-02-29 11:48 ` rguenth at gcc dot gnu.org 2024-02-29 22:46 ` pinskia at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: rguenth at gcc dot gnu.org @ 2024-02-29 11:44 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114166 --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- g++.dg/opt/pr82929.C with -m32, that is. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/114166] word_mode vectorization still relies on vector lowering 2024-02-29 11:43 [Bug tree-optimization/114166] New: word_mode vectorization still relies on vector lowering rguenth at gcc dot gnu.org 2024-02-29 11:44 ` [Bug tree-optimization/114166] " rguenth at gcc dot gnu.org @ 2024-02-29 11:48 ` rguenth at gcc dot gnu.org 2024-02-29 22:46 ` pinskia at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: rguenth at gcc dot gnu.org @ 2024-02-29 11:48 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114166 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |ice-on-valid-code, | |missed-optimization --- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- g++.dg/opt/vectcond-1.C also with -m32 is another testcase, this time for BIT_XOR_EXPR. SLP vectorization is also a bit too happy converting scalar code to vector<1> code, we should filter those out. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/114166] word_mode vectorization still relies on vector lowering 2024-02-29 11:43 [Bug tree-optimization/114166] New: word_mode vectorization still relies on vector lowering rguenth at gcc dot gnu.org 2024-02-29 11:44 ` [Bug tree-optimization/114166] " rguenth at gcc dot gnu.org 2024-02-29 11:48 ` rguenth at gcc dot gnu.org @ 2024-02-29 22:46 ` pinskia at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu.org @ 2024-02-29 22:46 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114166 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Last reconfirmed| |2024-02-29 Status|UNCONFIRMED |NEW Ever confirmed|0 |1 --- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Confirmed. I accidently came across this today via PR 114178 . ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2024-02-29 22:46 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2024-02-29 11:43 [Bug tree-optimization/114166] New: word_mode vectorization still relies on vector lowering rguenth at gcc dot gnu.org 2024-02-29 11:44 ` [Bug tree-optimization/114166] " rguenth at gcc dot gnu.org 2024-02-29 11:48 ` rguenth at gcc dot gnu.org 2024-02-29 22:46 ` pinskia at gcc dot gnu.org
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