public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug testsuite/109147] New: Missing IPA-VRP for return values
@ 2023-03-15 17:01 jakub at gcc dot gnu.org
2023-03-15 17:03 ` [Bug testsuite/109147] " pinskia at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2023-03-15 17:01 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109147
Bug ID: 109147
Summary: Missing IPA-VRP for return values
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
Assignee: unassigned at gcc dot gnu.org
Reporter: jakub at gcc dot gnu.org
CC: david.spickett at linaro dot org, unassigned at gcc dot gnu.org
Depends on: 109146
Target Milestone: ---
+++ This bug was initially created as a clone of Bug #109146 +++
I guess we should turn this primarily into an enhancement request to optimize
this.
I believe that is a request for return value ranges in IPA-VRP.
So a testcase could be:
__attribute__((noinline)) static int
foo (int a, int b)
{
return a == b;
}
int
bar (int a, int b)
{
return foo (a, b) != 0;
}
__attribute__((noinline)) static int
baz (int a)
{
if (a > 10 || a < -10)
return 0;
return a;
}
int
qux (int a)
{
return baz (a) == 42;
}
where if we determine that foo always returns [0, 1] and baz [-10, 10], then we
can
optimize that return ret != 0; into return ret; and ret == 42 into 0.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109146
[Bug 109146] Tail call prevention in frame-address.c is not correct
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug testsuite/109147] Missing IPA-VRP for return values
2023-03-15 17:01 [Bug testsuite/109147] New: Missing IPA-VRP for return values jakub at gcc dot gnu.org
@ 2023-03-15 17:03 ` pinskia at gcc dot gnu.org
2023-03-15 17:07 ` jakub at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-03-15 17:03 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109147
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Isn't this a dup of bug 81323 ?
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug testsuite/109147] Missing IPA-VRP for return values
2023-03-15 17:01 [Bug testsuite/109147] New: Missing IPA-VRP for return values jakub at gcc dot gnu.org
2023-03-15 17:03 ` [Bug testsuite/109147] " pinskia at gcc dot gnu.org
@ 2023-03-15 17:07 ` jakub at gcc dot gnu.org
2023-03-15 17:16 ` jakub at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2023-03-15 17:07 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109147
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 81313 ***
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug testsuite/109147] Missing IPA-VRP for return values
2023-03-15 17:01 [Bug testsuite/109147] New: Missing IPA-VRP for return values jakub at gcc dot gnu.org
2023-03-15 17:03 ` [Bug testsuite/109147] " pinskia at gcc dot gnu.org
2023-03-15 17:07 ` jakub at gcc dot gnu.org
@ 2023-03-15 17:16 ` jakub at gcc dot gnu.org
2023-03-15 17:16 ` jakub at gcc dot gnu.org
2023-12-06 18:59 ` pinskia at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2023-03-15 17:16 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109147
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Resolution|DUPLICATE |---
Status|RESOLVED |REOPENED
Last reconfirmed| |2023-03-15
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug testsuite/109147] Missing IPA-VRP for return values
2023-03-15 17:01 [Bug testsuite/109147] New: Missing IPA-VRP for return values jakub at gcc dot gnu.org
` (2 preceding siblings ...)
2023-03-15 17:16 ` jakub at gcc dot gnu.org
@ 2023-03-15 17:16 ` jakub at gcc dot gnu.org
2023-12-06 18:59 ` pinskia at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2023-03-15 17:16 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109147
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
.
*** This bug has been marked as a duplicate of bug 81323 ***
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug testsuite/109147] Missing IPA-VRP for return values
2023-03-15 17:01 [Bug testsuite/109147] New: Missing IPA-VRP for return values jakub at gcc dot gnu.org
` (3 preceding siblings ...)
2023-03-15 17:16 ` jakub at gcc dot gnu.org
@ 2023-12-06 18:59 ` pinskia at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-12-06 18:59 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109147
Bug 109147 depends on bug 109146, which changed state.
Bug 109146 Summary: Tail call prevention in frame-address.c is not correct
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109146
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2023-12-06 18:59 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-03-15 17:01 [Bug testsuite/109147] New: Missing IPA-VRP for return values jakub at gcc dot gnu.org
2023-03-15 17:03 ` [Bug testsuite/109147] " pinskia at gcc dot gnu.org
2023-03-15 17:07 ` jakub at gcc dot gnu.org
2023-03-15 17:16 ` jakub at gcc dot gnu.org
2023-03-15 17:16 ` jakub at gcc dot gnu.org
2023-12-06 18:59 ` pinskia 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).