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* [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]
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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
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