https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67194
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|unknown |4.8.0
Summary|Missed jump thread and |[9/10/11 Regression] Missed
|false positive from |jump thread and false
|-Wuninitialized |positive from
| |-Wuninitialized
CC| |msebor at gcc dot gnu.org
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
Last reconfirmed| |2021-03-31
Known to fail| |10.2.0, 11.0, 4.8.4, 4.9.4,
| |5.5.0, 6.4.0, 7.2.0, 8.3.0,
| |9.1.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed with GCC 11 as a regression introduced in r192537 (4.8.0 20121017):
$ gcc -O2 -S -Wall -xc++ pr67194.c
pr67194.c: In function ‘void elimination_costs_in_insn(rtx_insn*)’:
pr67194.c:53:28: warning: ‘orig_dup[0]’ may be used uninitialized in this
function [-Wmaybe-uninitialized]
53 | *recog_data.dup_loc[i] = orig_dup[i];
| ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
pr67194.c:34:7: note: ‘orig_dup[0]’ was declared here
34 | rtx orig_dup[30];
| ^~~~~~~~
