public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug middle-end/49106] New: static variable is optimized away even though it is referenced by a nested constructor
@ 2011-05-22 11:15 burnus at gcc dot gnu.org
2011-05-22 11:56 ` [Bug middle-end/49106] " rguenth at gcc dot gnu.org
2021-08-10 21:37 ` pinskia at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: burnus at gcc dot gnu.org @ 2011-05-22 11:15 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49106
Summary: static variable is optimized away even though it is
referenced by a nested constructor
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: burnus@gcc.gnu.org
In the following program, the function "test" is optimized way as the node is
not marked as needed. Thus, the static variable "a" is removed - even though it
is referenced in the nested constructor "_const_func".
Result: Link error:
/tmp/ccaIjMKk.o: In function `_const_func.1591':
test.c:(.text+0x6): undefined reference to `a.1589'
Expected: The local static should not be optimized way, i.e. the nested
function lowering should properly update the cgraph ipa reference list.
Side remark: For my purpose (coarray initialization in gfortran) it would be
best if in such a case both the function and the constructor could be optimized
away. Thus, if there would be some method on tree-level to tell this cgraph ...
main ()
{
void test (void)
{
static int a;
void __attribute__((constructor))
_const_func(void)
{
a = 7;
}
}
return 0;
}
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug middle-end/49106] static variable is optimized away even though it is referenced by a nested constructor
2011-05-22 11:15 [Bug middle-end/49106] New: static variable is optimized away even though it is referenced by a nested constructor burnus at gcc dot gnu.org
@ 2011-05-22 11:56 ` rguenth at gcc dot gnu.org
2021-08-10 21:37 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-05-22 11:56 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49106
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2011.05.22 11:17:27
CC| |hubicka at gcc dot gnu.org
Ever Confirmed|0 |1
--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-05-22 11:17:27 UTC ---
Confirmed.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug middle-end/49106] static variable is optimized away even though it is referenced by a nested constructor
2011-05-22 11:15 [Bug middle-end/49106] New: static variable is optimized away even though it is referenced by a nested constructor burnus at gcc dot gnu.org
2011-05-22 11:56 ` [Bug middle-end/49106] " rguenth at gcc dot gnu.org
@ 2021-08-10 21:37 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-08-10 21:37 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49106
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |7.0
Status|NEW |RESOLVED
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=77555
Resolution|--- |FIXED
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Fixed in GCC 7+.
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2021-08-10 21:37 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2011-05-22 11:15 [Bug middle-end/49106] New: static variable is optimized away even though it is referenced by a nested constructor burnus at gcc dot gnu.org
2011-05-22 11:56 ` [Bug middle-end/49106] " rguenth at gcc dot gnu.org
2021-08-10 21:37 ` 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).