2006-09-05 Andrew Pinski <pinskia@physics.uc.edu>

        PR tree-opt/28937
        * tree-flow.h (tree_ssa_unswitch_loops): Return unsigned int.
        (canonicalize_induction_variables): Likewise.
        (tree_unroll_loops_completely): Likewise.
        (tree_ssa_prefetch_arrays): Likewise.
        (remove_empty_loops): Likewise.
        * tree-ssa-loop-unswitch.c (tree_ssa_unswitch_loops): Return
        TODO_cleanup_cfg instead of directly calling
        cleanup_tree_cfg_loop.
        * tree-ssa-loop-ivcanon.c (canonicalize_induction_variables):
        Likewise.
        (tree_unroll_loops_completely): Likewise.
        (remove_empty_loops): Likewise.
        * tree-ssa-loop-prefetch.c (tree_ssa_prefetch_arrays): Likewise.
        * tree-ssa-loop.c (tree_ssa_loop_unswitch): Use the return value
        of tree_ssa_unswitch_loops.
        (tree_ssa_loop_ivcanon): Use the return value of
        canonicalize_induction_variables.
        (tree_ssa_empty_loop): Use the return value of
        remove_empty_loops.
        (tree_complete_unroll): Use the return value of
        tree_unroll_loops_completely.
        (tree_ssa_loop_prefetch): Use the return value of
        tree_ssa_prefetch_arrays.
        * passes.c (execute_todo): Before Cleanup CFG, set
        updating_used_alone and after cleanup CFG, call
        recalculate_used_alone.
2006-09-05  Andrew Pinski  <pinskia@physics.uc.edu>

        PR tree-opt/28937
        * g++.dg/opt/unroll2.C: New test.




git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@116717 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 5 insertions, 3 deletions

diff --git a/gcc/tree-ssa-loop-prefetch.c b/gcc/tree-ssa-loop-prefetch.c
index b58dbf6fccd..9340bbb4029 100644
--- a/gcc/tree-ssa-loop-prefetch.c
+++ b/gcc/tree-ssa-loop-prefetch.c
@@ -1006,12 +1006,13 @@ fail:
 
 /* Issue prefetch instructions for array references in LOOPS.  */
 
-void
+unsigned int
 tree_ssa_prefetch_arrays (struct loops *loops)
 {
   unsigned i;
   struct loop *loop;
   bool unrolled = false;
+  int todo_flags = 0;
 
   if (!HAVE_prefetch
       /* It is possible to ask compiler for say -mtune=i486 -march=pentium4.
@@ -1019,7 +1020,7 @@ tree_ssa_prefetch_arrays (struct loops *loops)
 	 of processor costs and i486 does not have prefetch, but
 	 -march=pentium4 causes HAVE_prefetch to be true.  Ugh.  */
       || PREFETCH_BLOCK == 0)
-    return;
+    return 0;
 
   initialize_original_copy_tables ();
 
@@ -1057,8 +1058,9 @@ tree_ssa_prefetch_arrays (struct loops *loops)
   if (unrolled)
     {
       scev_reset ();
-      cleanup_tree_cfg_loop ();
+      todo_flags |= TODO_cleanup_cfg;
     }
 
   free_original_copy_tables ();
+  return todo_flags;
 }