[Bug target/23831] New: ICE in immed_double_const with vectorized multipication

["uros at kss-loka dot si" <gcc-bugzilla at gcc dot gnu dot org>]

This testcase ICEs with -O2 -msse2 -ftree-vectorize:

void
test_1 (void)
{
  static unsigned int bm[16];
  int j;
  for (j = 0; j < 16; j++)
    bm[j] = bm[j] * 8;
}

prxxx.c: In function 'test_1':
prxxx.c:8: internal compiler error: in immed_double_const, at emit-rtl.c:468

[BTW: This bug was found when dealing with PR target/22480. As a nice 
enhancement, this code should actually be transformed into vector left shift by 
3.]

-- 
           Summary: ICE in immed_double_const with vectorized multipication
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code, ssemmx
          Severity: normal
          Priority: P2
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: uros at kss-loka dot si
                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=23831