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

   1 /* { dg-require-effective-target int32plus } */
   2 /* { dg-options "-O1 -ffast-math -floop-interchange" } */
   3
   4 int adler32(int adler, char *buf, int n)
   5 {
   6   int sum = 0;
   7   do {
   8      adler += buf[0];
   9      sum += adler;
  10      adler += buf[1];
  11      sum += adler;
  12      adler += buf[2];
  13      sum += adler;
  14      adler += buf[3];
  15      sum += adler;
  16   } while (--n);
  17   return adler | (sum << 16);
  18 }