gcc/testsuite/gcc.dg/tree-ssa/ssa-hoist-8.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-pre-stats" } */
   3
   4 int mem;
   5 void foo ();
   6 int bar (int flag)
   7 {
   8   int res;
   9   foo ();
  10   /* Hoist the load of mem here even though foo () clobbers it.  */
  11   if (flag)
  12     res = mem;
  13   else
  14     {
  15       res = mem;
  16       mem = 2;
  17     }
  18   return res;
  19 }
  20
  21 /* { dg-final { scan-tree-dump "HOIST inserted: 1" "pre" } } */
  22 /* { dg-final { scan-tree-dump-times " = mem;" 1 "pre" } } */