gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-thread-2d.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-vrp1-stats -fdump-tree-dom2-stats" } */
   3
   4 void foo();
   5 void bla();
   6 void bar();
   7
   8 /* Avoid threading in the following case, to prevent creating subloops.  */
   9
  10 void dont_thread_2 (int first)
  11 {
  12   int i = 0;
  13
  14   do
  15     {
  16       bla ();
  17       bla ();
  18       bla ();
  19       if (first)
  20         foo ();
  21       else
  22         bar ();
  23
  24       first = 0;
  25       bla ();
  26     } while (i++ < 100);
  27 }
  28
  29 /* Peeling off the first iteration would make threading through
  30    the loop latch safe, but we don't do that currently.  */
  31 /* { dg-final { scan-tree-dump-not "Jumps threaded" "vrp1"} } */
  32 /* { dg-final { scan-tree-dump-not "Jumps threaded" "dom2"} } */