gcc/testsuite/gcc.dg/graphite/pr42205-1.c

   1 /* { dg-options "-O1 -ffast-math -floop-interchange" } */
   2
   3 int adler32(int adler, char *buf, int n)
   4 {
   5   int sum = 0;
   6   do {
   7      adler += buf[0];
   8      sum += adler;
   9      adler += buf[1];
  10      sum += adler;
  11      adler += buf[2];
  12      sum += adler;
  13      adler += buf[3];
  14      sum += adler;
  15   } while (--n);
  16   return adler | (sum << 16);
  17 }