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 /* Load immediate on condition is available from z13 on and prevents moving
   5    the load out of the loop, so always run this test with -march=zEC12 that
   6    does not have load immediate on condition.  */
   7 /* { dg-additional-options "-march=zEC12" { target { s390*-*-* } } } */
   8
   9 void
  10 f (int *a, int *b)
  11 {
  12   int i;
  13
  14   for (i = 0; i < 100; i++)
  15     {
  16       int d = 42;
  17
  18       a[i] = d;
  19       if (i % 2)
  20         d = i;
  21       b[i] = d;
  22     }
  23 }
  24
  25 /* Load of 42 is moved out of the loop, introducing a new pseudo register.  */
  26 /* { dg-final { scan-rtl-dump-times "Decided" 1 "loop2_invariant" } } */
  27 /* { dg-final { scan-rtl-dump-not "without introducing a new temporary register" "loop2_invariant" } } */
  28