gcc/testsuite/gcc.dg/tm/pub-safety-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-fgnu-tm -O1 -fdump-tree-lim1" } */
   3
   4 /* Test that thread visible loads do not get hoisted out of loops if
   5    the load would not have occurred on each path out of the loop.  */
   6
   7 int x[10] = {0,0,0,0,0,0,0,0,0,0};
   8 int DATA_DATA = 0;
   9
  10 void reader()
  11 {
  12   int i;
  13   __transaction_atomic
  14     {
  15       for (i = 0; i < 10; i++)
  16         if (x[i])
  17           x[i] += DATA_DATA;
  18       /* If we loaded DATA_DATA here, we could hoist it before the loop,
  19          but since we don't... we can't.  */
  20     }
  21 }
  22
  23 /* { dg-final { scan-tree-dump-times "Cannot hoist.*DATA_DATA because it is in a transaction" 1 "lim1" } } */
  24 /* { dg-final { cleanup-tree-dump "lim1" } } */