gcc/testsuite/gcc.dg/loop-8.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -fdump-rtl-loop2_invariant" } */
   3
   4 void
   5 f (int *a, int *b)
   6 {
   7   int i;
   8
   9   for (i = 0; i < 100; i++)
  10     {
  11       int d = 42;
  12
  13       a[i] = d;
  14       if (i % 2)
  15         d = i;
  16       b[i] = d;
  17     }
  18 }
  19
  20 /* Load of 42 is moved out of the loop, introducing a new pseudo register.  */
  21 /* { dg-final { scan-rtl-dump-times "Decided" 1 "loop2_invariant" } } */
  22 /* { dg-final { scan-rtl-dump-not "without introducing a new temporary register" "loop2_invariant" } } */
  23