[Bug tree-optimization/37056] New: ICE in build2_stat, at tree.c:3257

[kkojima at gcc dot gnu dot org]

The mainline compiler (trunk revision 138833) fails to compile
the test case below with -O1:

foo.c:24: internal compiler error: in build2_stat, at tree.c:3257


static union {
  char buf[12 * sizeof (long long)];
} u;

int main ()
{
  int off, len, i;
  char *p, *q;

  for (off = 0; off < (sizeof (long long)); off++)
    for (len = 1; len < (10 * sizeof (long long)); len++)
      {
        for (i = 0; i < (12 * sizeof (long long)); i++)
          u.buf[i] = 'a';
        p = (__extension__ (__builtin_constant_p ('\0') && ('\0') == '\0'
                            ? ({void *__s = (u.buf + off); __s;})
                            : memset (u.buf + off, '\0', len)));
        if (p != u.buf + off)
          abort ();
        for (i = 0; i < off; i++, q++)
          if (*q != 'a')
            abort ();
      }
}


-- 
           Summary: ICE in build2_stat, at tree.c:3257
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: kkojima at gcc dot gnu dot org
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37056