[Bug tree-optimization/51301] New: Compiler ICE in vect_is_simple_use_1

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51301

             Bug #: 51301
           Summary: Compiler ICE in vect_is_simple_use_1
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: mgretton@sourceware.org
                CC: irar@gcc.gnu.org
            Target: arm*-*-*


Compiling the following test results in an ICE:

$ cat test.c
/* arm-systest-eabi-gcc -c -O3 -mcpu=cortex-a9 -mfpu=neon -mfloat-abi=softfp
test.c  */
typedef signed char int8_t;
typedef signed long long int64_t;
int64_t
f0a (int8_t * __restrict__ arg1)
{
  int idx;
  int64_t result = 0;
  for (idx = 0; idx < 416; idx += 1)
    result += arg1[idx] << (arg1[idx] == arg1[idx]);
  return result;
}
/* End of test.c.  */
$ arm-upstream-eabi-gcc -c test.c -O3
test.c: In function 'f0a':
test.c:5:1: internal compiler error: in vect_is_simple_use_1, at
tree-vect-stmts.c:5970
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Tested against gcc trunk, rev 181718