gcc/testsuite/gcc.dg/tree-ssa/ssa-thread-18.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-threadfull1-stats" } */
   3
   4 void foo (int nest, int print_nest)
   5 {
   6   _Bool t0 = nest != 0;
   7   _Bool t1 = nest == print_nest;
   8   _Bool t2 = t0 & t1;
   9   if (t2)
  10     __builtin_puts ("x");
  11   nest++;
  12   if (nest > 2)
  13     __builtin_abort ();
  14   if (print_nest == nest)
  15     __builtin_puts ("y");
  16 }
  17
  18 /* We should be able to thread (t2) to !(print_nest == nest) using the
  19    nest == print_nest relation implied by the entry block.  */
  20 /* { dg-final { scan-tree-dump "Jumps threaded: 1" "threadfull1" } } */