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* [Bug c/110638] New: [13 regression] memcpy should be inlined with sve loop @ 2023-07-12 7:42 zhongyunde at huawei dot com 2023-07-12 7:53 ` [Bug target/110638] " pinskia at gcc dot gnu.org 2023-07-12 7:55 ` pinskia at gcc dot gnu.org 0 siblings, 2 replies; 3+ messages in thread From: zhongyunde at huawei dot com @ 2023-07-12 7:42 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110638 Bug ID: 110638 Summary: [13 regression] memcpy should be inlined with sve loop Product: gcc Version: 13.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: zhongyunde at huawei dot com Target Milestone: --- * test:https://gcc.godbolt.org/z/39KddjbE4 ``` void va(struct args_t * func_args) { for (int nl = 0; nl < iterations; nl++) { for (int i = 0; i < LEN_1D; i++) { a[i] = b[i]; } dummy(a, b); } return ; } ``` * gcc12: don't transform the loop into a memcpy call, so it can make use of the new sve feature. * gcc13: use a normal 'bl memcpy' The above regression start from gcc13. ^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug target/110638] [13 regression] memcpy should be inlined with sve loop 2023-07-12 7:42 [Bug c/110638] New: [13 regression] memcpy should be inlined with sve loop zhongyunde at huawei dot com @ 2023-07-12 7:53 ` pinskia at gcc dot gnu.org 2023-07-12 7:55 ` pinskia at gcc dot gnu.org 1 sibling, 0 replies; 3+ messages in thread From: pinskia at gcc dot gnu.org @ 2023-07-12 7:53 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110638 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |missed-optimization Component|c |target --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- I don't see how this is an issue because memcpy in glibc already uses SVE too ... ^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug target/110638] [13 regression] memcpy should be inlined with sve loop 2023-07-12 7:42 [Bug c/110638] New: [13 regression] memcpy should be inlined with sve loop zhongyunde at huawei dot com 2023-07-12 7:53 ` [Bug target/110638] " pinskia at gcc dot gnu.org @ 2023-07-12 7:55 ` pinskia at gcc dot gnu.org 1 sibling, 0 replies; 3+ messages in thread From: pinskia at gcc dot gnu.org @ 2023-07-12 7:55 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110638 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |INVALID Status|UNCONFIRMED |RESOLVED --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Actually this is the correct thing to do. memcpy in glibc has used SVE since glibc commit 9f298bfe1f183804bb54b54ff9071afc0494906c . ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2023-07-12 7:55 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2023-07-12 7:42 [Bug c/110638] New: [13 regression] memcpy should be inlined with sve loop zhongyunde at huawei dot com 2023-07-12 7:53 ` [Bug target/110638] " pinskia at gcc dot gnu.org 2023-07-12 7:55 ` pinskia at gcc dot gnu.org
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