gcc/testsuite/gcc.dg/pr42629.c

   1 /* This failed -fcompare-debug because register pressure computation
   2    took debug insns into account.  */
   3 /* { dg-do compile } */
   4 /* { dg-options "-O1 -fsched-pressure -fschedule-insns -fcompare-debug" } */
   5 /* { dg-require-effective-target int32plus } */
   6
   7 int lzo_adler32(int adler, char *buf)
   8 {
   9   int s1 = adler;
  10   int s2 = adler;
  11   s1 += buf[0];
  12   s2 += s1;
  13   s1 += buf[1];
  14   s2 += s1;
  15   s1 += buf[2];
  16   s2 += s1;
  17   s1 += buf[3];
  18   s2 += s1;
  19   s1 += buf[4];
  20   s2 += s1;
  21   s1 += buf[5];
  22   s2 += s1;
  23   s1 += buf[6];
  24   s2 += s1;
  25   s1 += buf[7];
  26   s2 += s1;
  27   return (s2 << 16) + s1;
  28 }