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[/] [openrisc/] [trunk/] [gnu-stable/] [gcc-4.5.1/] [gcc/] [testsuite/] [gcc.dg/] [tree-ssa/] [ssa-dom-thread-2.c] - Blame information for rev 826

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Line No. Rev Author Line
1 298 jeremybenn 
/* { dg-do compile } */
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/* { dg-options "-O2 -fdump-tree-vrp1-stats -fdump-tree-dom1-stats" } */
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void foo();
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void bla();
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void bar();
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/* In the following two cases, we should be able to thread edge through
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   the loop header.  */
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void thread_entry_through_header (void)
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{
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  int i;
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  for (i = 0; i < 170; i++)
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    bla ();
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}
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void thread_latch_through_header (void)
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{
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  int i = 0;
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  int first = 1;
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  do
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    {
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      if (first)
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        foo ();
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      first = 0;
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      bla ();
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    } while (i++ < 100);
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}
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/* This is a TODO -- it is correct to thread both entry and latch edge through
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   the header, but we do not handle this case yet.  */
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void dont_thread_1 (void)
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{
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  int i = 0;
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  int first = 1;
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  do
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    {
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      if (first)
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        foo ();
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      else
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        bar ();
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      first = 0;
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      bla ();
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    } while (i++ < 100);
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}
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/* Avoid threading in the following two cases, to prevent creating subloops.  */
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void dont_thread_2 (int first)
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{
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  int i = 0;
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  do
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    {
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      if (first)
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        foo ();
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      else
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        bar ();
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      first = 0;
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      bla ();
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    } while (i++ < 100);
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}
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void dont_thread_3 (int nfirst)
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{
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  int i = 0;
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  int first = 0;
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  do
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    {
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      if (first)
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        foo ();
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      else
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        bar ();
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      first = nfirst;
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      bla ();
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    } while (i++ < 100);
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}
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/* Avoid threading in this case, in order to avoid creating loop with
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   multiple entries.  */
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void dont_thread_4 (int a, int nfirst)
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{
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  int i = 0;
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  int first;
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  if (a)
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    first = 0;
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  else
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    first = 1;
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  do
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    {
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      if (first)
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        foo ();
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      else
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        bar ();
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      first = nfirst;
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      bla ();
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    } while (i++ < 100);
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}
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/* { dg-final { scan-tree-dump-times "Jumps threaded: 1" 1 "vrp1"} } */
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/* { dg-final { scan-tree-dump-times "Jumps threaded: 2" 0 "vrp1"} } */
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/* { dg-final { scan-tree-dump-times "Jumps threaded: 1" 0 "dom1"} } */
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/* { dg-final { scan-tree-dump-times "Jumps threaded: 2" 1 "dom1"} } */
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/* { dg-final { cleanup-tree-dump "dom1" } } */
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/* { dg-final { cleanup-tree-dump "vrp1" } } */

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