https://gcc.gnu.org/bugzilla/show_bug.cgi?id=40635
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2009-07-06 13:19:06 |2017-3-2
Known to fail| |6.3.0, 7.0.1
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed with GCC 6/7 at -O[1s]:
t.c: In function ‘server_init’:
t.c:38:6: warning: ‘s42’ may be used uninitialized in this function
[-Wmaybe-uninitialized]
if (sockt_rd < 0)
^
the location is from the use of _16:
<bb 2> [14.30%]:
[t.c:16:6] hp_7 = gethostbyname (machine_3(D));
[t.c:18:13] addr_8 = [t.c:18:17] hp_7->h_addr_list;
[t.c:18:32] _32 = *addr_8;
[t.c:18:3] if (_32 != 0B)
goto <bb 10>; [95.00%]
else
goto <bb 11>; [5.00%]
<bb 11> [0.72%]:
<bb 9> [5.23%]:
# s42_21 = PHI <s42_18(D)(11), [t.c:19:11] s42_9(13)>
goto <bb 8>; [100.00%]
<bb 8> [14.26%]:
# _16 = PHI <[t.c:21:9] -1(12), [t.c:28:12] -1(7), [t.c:19:11] s42_9(15),
s42_21(9)>
[t.c:37:3] foo ();
[t.c:38:6] _28 = _16 < 0;
you can see how the PHI arg coming from BB 9 lacks a location. We are
appearantly not very good in preserving locations of return stmts when
inlining.
