gcc/testsuite/gcc.dg/pr108970.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -ftree-loop-vectorize -fno-tree-dce -fno-tree-scev-cprop" } */
   3
   4 int m;
   5
   6 __attribute__ ((noinline, returns_twice)) void
   7 empty (void)
   8 {
   9 }
  10
  11 void
  12 foo (void)
  13 {
  14   while (m < 1)
  15     {
  16       empty ();
  17       ++m;
  18     }
  19 }