gcc/testsuite/gcc.dg/tree-ssa/ivopt_mult_1.c

   1 /* { dg-do compile { target {{ i?86-*-* x86_64-*-* } && lp64 } } } */
   2 /* { dg-options "-O2 -m64 -fdump-tree-ivopts-details" } */
   3
   4 /* The test 'if (p2 > p_limit2)' can be replaced, so iv p2 can be
   5  * eliminated.  */
   6 long foo(long* p, long* p2, int N1, int N2)
   7 {
   8   int i = 0;
   9   long* p_limit = p + N1;
  10   long* p_limit2 = p2 + N2;
  11   long s = 0;
  12   while (p  <= p_limit)
  13     {
  14       p++;
  15       p2++;
  16       if (p2 > p_limit2)
  17         break;
  18       s += (*p);
  19     }
  20   return s;
  21 }
  22
  23 /* { dg-final { scan-tree-dump-times "Replacing" 1 "ivopts"} } */
  24 /* { dg-final { cleanup-tree-dump "ivopts" } } */