regehr@john-home:~/volatile/tmp51$ current-gcc -O small.c
small.c: In function ‘func_142’:
small.c:15: internal compiler error: in smallest_mode_for_size, at
stor-layout.c:219
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

regehr@john-home:~/volatile/tmp51$ current-gcc -v

Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../configure --program-prefix=current-
--enable-languages=c,c++ --prefix=/home/regehr
Thread model: posix
gcc version 4.4.0 20081027 (experimental) (GCC) 

regehr@john-home:~/volatile/tmp51$ cat small.c

inline int
rshift_u_s (unsigned int left, int right)
{
  return left >> right;
}

char g_95;
const int g_126 = 9L;

int
func_142 (int p_143, int p_144, int p_145, int p_146)
{
  int l_152 = -1;
  if (lshift_u_u (func_26 (rshift_u_s (g_95 ^ l_152, g_126)), 1));
}


-- 
           Summary: ice in smallest_mode_for_size, at stor-layout.c:219
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: regehr at cs dot utah dot edu
 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=37924