[Bug c/30856] New: Missing "warning: '$FOO' may be used uninitialized in this function" in trivial case

["christoph dot mallon at gmx dot de" <gcc-bugzilla at gcc dot gnu dot org>]

int f(int x)
{
  int y;
  if (x == 42) y = 23;
  return y;
}

This simple function results in no warning about the possibly uninitialized
local variable 'y' when using the following compiler versions (compiler flags:
-O -Wall):
GCC 4.1.2 20070205
GCC 4.2.0 20070214
GCC 4.3.0 20070209

The warning is correctly reported by GCC 2.95.3, GCC 3.4.6 20060305 and GCC
4.0.4.


-- 
           Summary: Missing "warning: '$FOO' may be used uninitialized in
                    this function" in trivial case
           Product: gcc
           Version: 4.1.2
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: christoph dot mallon at gmx dot de


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30856