gcc/testsuite/gcc.dg/tree-ssa/reassoc-19.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-Os -fdump-tree-reassoc2" } */
   3
   4 /* Slightly changed testcase from PR middle-end/40815.  */
   5 void bar(char*, char*, int);
   6 void foo(char* left, char* rite, int element)
   7 {
   8   while (left <= rite)
   9   {
  10     /* This should expand into
  11        D.zzzz = D.zzzz - D.xxxx;
  12        and NOT to
  13        D.D.yyyy = -D.xxxx; D.zzzz = D.zzzz + D.yyyy;  */
  14     rite -= element;
  15     bar(left, rite, element);
  16   }
  17 }
  18
  19 /* There should be no " + " in the dump.  */
  20 /* { dg-final { scan-tree-dump-times " \\\+ " 0 "reassoc2" } } */
  21 /* { dg-final { cleanup-tree-dump "reassoc2" } } */