gnu/dist/gcc4/gcc/testsuite/gcc.dg/tree-ssa/loop-7.c

   1 /* PR tree-optimization/19828 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O1 -fdump-tree-lim-details" } */
   4
   5 int cst_fun1 (int) __attribute__((__const__));
   6 int cst_fun2 (int) __attribute__((__const__));
   7 int pure_fun1 (int) __attribute__((__pure__));
   8 int pure_fun2 (int) __attribute__((__pure__));
   9 int foo (void);
  10
  11 int xxx (void)
  12 {
  13   int i, k = foo (), x = 0;
  14
  15   for (i = 0; i < 100; i++)
  16     {
  17       x += cst_fun1 (k);
  18       x += pure_fun1 (k);
  19
  20       if (k)
  21         {
  22           x += cst_fun2 (k);
  23           x += pure_fun2 (k);
  24         }
  25     }
  26
  27   return x;
  28 }
  29
  30 /* Calls to cst_fun1 and pure_fun1 may be moved out of the loop.
  31    Calls to cst_fun2 and pure_fun2 should not be, since calling
  32    with k = 0 may be invalid.  */
  33
  34 /* { dg-final { scan-tree-dump-times "Moving statement" 3 "lim" } } */
  35 /* { dg-final { cleanup-tree-dump "lim" } } */