public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
* [Bug ipa/111430] New: IPA read only variable analysis should handle the case where the storing was the same as the initialization
@ 2023-09-16 1:23 pinskia at gcc dot gnu.org
2023-09-16 1:23 ` [Bug ipa/111430] " pinskia at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-09-16 1:23 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111430
Bug ID: 111430
Summary: IPA read only variable analysis should handle the case
where the storing was the same as the initialization
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: pinskia at gcc dot gnu.org
CC: marxin at gcc dot gnu.org
Target Milestone: ---
Take:
```
#define CST 1025
static int b = CST;
void f(int a)
{
if (a)
b = CST;
}
int g(void)
{
return b;
}
```
We should be able to optimize out the store to b in f and even the load in g.
This is another way of solving the original testcase in PR 110992.
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug ipa/111430] IPA read only variable analysis should handle the case where the storing was the same as the initialization 2023-09-16 1:23 [Bug ipa/111430] New: IPA read only variable analysis should handle the case where the storing was the same as the initialization pinskia at gcc dot gnu.org @ 2023-09-16 1:23 ` pinskia at gcc dot gnu.org 2023-09-16 1:23 ` pinskia at gcc dot gnu.org 2023-09-18 8:59 ` rguenth at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu.org @ 2023-09-16 1:23 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111430 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Severity|normal |enhancement ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug ipa/111430] IPA read only variable analysis should handle the case where the storing was the same as the initialization 2023-09-16 1:23 [Bug ipa/111430] New: IPA read only variable analysis should handle the case where the storing was the same as the initialization pinskia at gcc dot gnu.org 2023-09-16 1:23 ` [Bug ipa/111430] " pinskia at gcc dot gnu.org @ 2023-09-16 1:23 ` pinskia at gcc dot gnu.org 2023-09-18 8:59 ` rguenth at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu.org @ 2023-09-16 1:23 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111430 --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Note LLVM does this optimization ... ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug ipa/111430] IPA read only variable analysis should handle the case where the storing was the same as the initialization 2023-09-16 1:23 [Bug ipa/111430] New: IPA read only variable analysis should handle the case where the storing was the same as the initialization pinskia at gcc dot gnu.org 2023-09-16 1:23 ` [Bug ipa/111430] " pinskia at gcc dot gnu.org 2023-09-16 1:23 ` pinskia at gcc dot gnu.org @ 2023-09-18 8:59 ` rguenth at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: rguenth at gcc dot gnu.org @ 2023-09-18 8:59 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111430 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |hubicka at gcc dot gnu.org Ever confirmed|0 |1 Status|UNCONFIRMED |NEW Last reconfirmed| |2023-09-18 --- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- I think there's a duplicate for this. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2023-09-18 8:59 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2023-09-16 1:23 [Bug ipa/111430] New: IPA read only variable analysis should handle the case where the storing was the same as the initialization pinskia at gcc dot gnu.org 2023-09-16 1:23 ` [Bug ipa/111430] " pinskia at gcc dot gnu.org 2023-09-16 1:23 ` pinskia at gcc dot gnu.org 2023-09-18 8:59 ` rguenth 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).