[Bug c++/81714] incorrect location for uninitialised variable

["msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81714

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|6.4.0, 7.3.0, 8.0           |10.2.0, 11.0, 6.3.0, 7.0.1,
                   |                            |8.3.0, 9.3.0
   Last reconfirmed|2018-02-02 00:00:00         |2021-4-2

--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Reconfirmed with GCC 11.  This doesn't look like a problem with -Wuninitialized
but rather much earlier.  The Gimple dump already has the wrong column number:

$ cat pr81714.c && gcc -S -Wall -fdump-tree-gimple-lineno=/dev/stdout -xc++
pr81714.c
int f0 ()
{
  int i;
  return i + 1;
}

int f1 ()
{ 
  int i;
  return 2 + i;
}

int f0 ()
[pr81714.c:4:15] {
  int D.2352;
  int i;

  [pr81714.c:4:14] D.2352 = i + 1;
  [pr81714.c:4:14] return D.2352;
}


int f1 ()
[pr81714.c:10:15] {
  int D.2354;
  int i;

  [pr81714.c:10:14] D.2354 = i + 2;
  [pr81714.c:10:14] return D.2354;
}


pr81714.c: In function ‘int f0()’:
pr81714.c:4:14: warning: ‘i’ is used uninitialized [-Wuninitialized]
    4 |   return i + 1;
      |              ^
pr81714.c:3:7: note: ‘i’ was declared here
    3 |   int i;
      |       ^
pr81714.c: In function ‘int f1()’:
pr81714.c:10:14: warning: ‘i’ is used uninitialized [-Wuninitialized]
   10 |   return 2 + i;
      |              ^
pr81714.c:9:7: note: ‘i’ was declared here
    9 |   int i;
      |       ^

Other middle-end warnings are also affected (e.g., -Warray-bounds).