[Bug tree-optimization/18501] New: Missing 'used unintialized' warning

["nathan at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

The attached testcase has an uninitialized variable, it is not
diagnosed with -O2 -W -Wall.  Gcc 3.2 says,

uninit.i: In function `bitmap_print_value_set':
uninit.i:8: warning: `first' might be used uninitialized in this function

this is a regression

-- 
           Summary: Missing 'used unintialized' warning
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: nathan at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18501