gcc/testsuite/gcc.dg/tree-ssa/pr31521.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-vrp1" } */
   3
   4 void fail(void) __attribute__((noreturn));
   5 int bar(int);
   6
   7 int foo(int x) {
   8   int i;
   9   int s = 0;
  10
  11   if (x <= 0) fail();
  12   for (i = 0; i < x; ++i) {
  13     /* This division by 4 should be replaced with >> 2.  */
  14     s += bar(i/4);
  15   }
  16   return s;
  17 }
  18
  19 /* { dg-final { scan-tree-dump-times " = i_.* >> 2" 1 "vrp1" } } */
  20 /* { dg-final { cleanup-tree-dump "vrp1" } } */