gcc/testsuite/gcc.dg/pr23049.c

   1 /* This was an ICE in fold where we tried to fold something like,
   2
   3      a = 0 == 0 ? 0 : 3988292384
   4
   5    after doing if-conversion for the vectorizer.  Folding "0 == 0"
   6    should have been done before calling fold on the whole rhs of
   7    the above expression.  */
   8
   9 /* { dg-do compile } */
  10 /* { dg-require-effective-target int32plus } */
  11 /* { dg-options "-O3 -ftree-vectorize" } */
  12
  13 static unsigned short int crc_table[256];
  14 void AC3_encode_init(void)
  15 {
  16   unsigned int c, n, k;
  17   for(n=0;  n<256; n++)
  18   {
  19     c = n << 8;
  20     for (k = 0; k < 8; k++)
  21     {
  22       if (c & (1 << 15))
  23        c = ((c << 1) & 0xffff) ^ (((1 << 0) | (1 << 2) | (1 << 15) | (1 << 16)) & 0xffff);
  24     }
  25     crc_table[n] = c;
  26   }
  27 }