[Bug tree-optimization/38359] New: [4.3/4.4 regression] ICE in set_lattice_value, at tree-ssa-ccp.c:466

["debian-gcc at lists dot debian dot org" <gcc-bugzilla at gcc dot gnu dot org>]

[forwarded from http://bugs.debian.org/PR492505]

works with 4.2 branch, fails with 4.3 branch and trunk, succeeds with -O0

$ gcc-4.3 000.c -c -O1
000.c: In function '_ov_64_seek_lap':
000.c:33: internal compiler error: in set_lattice_value, at tree-ssa-ccp.c:487
Please submit a full bug report,
with preprocessed source if appropriate.

void _ov_64_seek_lap (void)
{
  unsigned x1, x2, x3;
  unsigned ltmp_3978_7;
  unsigned ltmp_3978_7__PHI_TEMPORARY;
  unsigned ltmp_4011_7__PHI_TEMPORARY;
  unsigned ltmp_4012_7;
  signed ltmp_4011_7;

  if (x1)
  {
    if (x2)
    {
      goto llvm_cbe__ov_initset_2e_exit;
    }
  }
  while (1)
    ;

llvm_cbe__ov_initset_2e_exit:
  if (x3)
  {
    ltmp_3978_7__PHI_TEMPORARY = 0xffffff7e;
    goto llvm_cbe_ov_halfrate_p_2e_exit;
  }
  ltmp_3978_7__PHI_TEMPORARY = 1;

llvm_cbe_ov_halfrate_p_2e_exit:
  ltmp_3978_7 = ltmp_3978_7__PHI_TEMPORARY;
  ltmp_4011_7__PHI_TEMPORARY = 0xffffffff;
  ltmp_4011_7 = ltmp_4011_7__PHI_TEMPORARY;
  ltmp_4012_7 = ltmp_4011_7 >> ltmp_3978_7;
}


-- 
           Summary: [4.3/4.4 regression] ICE in set_lattice_value, at tree-
                    ssa-ccp.c:466
           Product: gcc
           Version: 4.3.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: debian-gcc at lists dot debian dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38359