[Bug tree-optimization/17512] New: ICE in regex.c

["kazu at cs dot umass dot edu" <gcc-bugzilla at gcc dot gnu dot org>]

Compile the following with ./cc1 -O2

char
foo (const char *p)
{
  const char *q = p;
  return ((p != 0) == (q == p));
}

I get

kazu.c: In function 'foo':
kazu.c:3: internal compiler error: in invert_truthvalue, at fold-const.c:2993
Please submit a full bug report,

This testcase was reduced from libiberty/regex.c.

-- 
           Summary: ICE in regex.c
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: kazu at cs dot umass dot edu
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17512