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

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -fdump-rtl-loop2_invariant" } */
   3 /* { dg-skip-if "unexpected IV" { "hppa*-*-* mips*-*-* visium-*-* powerpc*-*-* riscv*-*-*" } { "*" } { "" } } */
   4
   5 void
   6 f (int *a, int *b)
   7 {
   8   int i;
   9
  10   for (i = 0; i < 100; i++)
  11     {
  12       int d = 42;
  13
  14       a[i] = d;
  15       if (i % 2)
  16         d = i;
  17       b[i] = d;
  18     }
  19 }
  20
  21 /* Load of 42 is moved out of the loop, introducing a new pseudo register.  */
  22 /* { dg-final { scan-rtl-dump-times "Decided" 1 "loop2_invariant" } } */
  23 /* { dg-final { scan-rtl-dump-not "without introducing a new temporary register" "loop2_invariant" } } */
  24