$ gcc -c -v verify_gimple_failure.adb
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../../SOURCES/gcc/configure --prefix=/opt/gccsnap --enable-debug --enable-languages=c,ada,c++
Thread model: posix
gcc version 4.4.0 20080403 (experimental) (GCC) 
COLLECT_GCC_OPTIONS='-c' '-v' '-mtune=generic'
 /opt/gccsnap/libexec/gcc/i686-pc-linux-gnu/4.4.0/gnat1 -quiet -dumpbase verify_gimple_failure.adb -mtune=generic verify_gimple_failure.adb -o /tmp/ccFTWmc5.s
verify_gimple_failure.adb: In function ‘Verify_Gimple_Failure’:
verify_gimple_failure.adb:2: error: type mismatch in comparison expression
<unnamed type>

bit_size_type

universal_integer

if (D.213 == 0)
  {
    goto <D.200>;
  }
else
  {
    
  }
verify_gimple_failure.adb:2: error: type mismatch in comparison expression
<unnamed type>

bit_size_type

universal_integer

if (D.224 <= 0)
  {
    goto <D.201>;
  }
else
  {
    goto <D.200>;
  }
verify_gimple_failure.adb:2: error: type mismatch in comparison expression
<unnamed type>

bit_size_type

universal_integer

if (D.235 > 2147483647)
  {
    goto <D.201>;
  }
else
  {
    goto <D.202>;
  }
+===========================GNAT BUG DETECTED==============================+
| 4.4.0 20080403 (experimental) (i686-pc-linux-gnu) verify_gimple failed   |
| Error detected around verify_gimple_failure.adb:2                        |
| Please submit a bug report; see http://gcc.gnu.org/bugs.html.            |
| Use a subject line meaningful to you and us to track the bug.            |
| Include the entire contents of this bug box in the report.               |
| Include the exact gcc or gnatmake command that you entered.              |
| Also include sources listed below in gnatchop format                     |
| (concatenated together with no headers between files).                   |
+==========================================================================+

Please include these source files with error report
Note that list may not be accurate in some cases,
so please double check that the problem can still
be reproduced with the set of files listed.

verify_gimple_failure.adb

compilation abandoned

-- file: verify_gimple_failure.adb
procedure Verify_Gimple_Failure (Arg : in String) is
   Size : constant Natural := Arg'Size;
begin
   null;
end Verify_Gimple_Failure;