* config/i386/xmmintrin.h (_mm_prefetch): Added const to first arg.

[pf3gnuchains/gcc-fork.git] / gcc / tree-ssa-loop-manip.c

diff --git a/gcc/tree-ssa-loop-manip.c b/gcc/tree-ssa-loop-manip.c
index 35bf978..91aac3e 100644 (file)
--- a/gcc/tree-ssa-loop-manip.c
+++ b/gcc/tree-ssa-loop-manip.c
@@ -5,7 +5,7 @@ This file is part of GCC.
    
 GCC is free software; you can redistribute it and/or modify it
 under the terms of the GNU General Public License as published by the
-Free Software Foundation; either version 2, or (at your option) any
+Free Software Foundation; either version 3, or (at your option) any
 later version.
    
 GCC is distributed in the hope that it will be useful, but WITHOUT
@@ -14,9 +14,8 @@ FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 for more details.
    
 You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING.  If not, write to the Free
-Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA.  */
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
 
 #include "config.h"
 #include "system.h"
@@ -366,7 +365,7 @@ rewrite_into_loop_closed_ssa (bitmap changed_bbs, unsigned update_flag)
   unsigned i, old_num_ssa_names;
   bitmap names_to_rename;
 
-  current_loops->state |= LOOP_CLOSED_SSA;
+  loops_state_set (LOOP_CLOSED_SSA);
   if (number_of_loops () <= 1)
     return;
 
@@ -455,9 +454,9 @@ verify_loop_closed_ssa (void)
 }
 
 /* Split loop exit edge EXIT.  The things are a bit complicated by a need to
-   preserve the loop closed ssa form.  */
+   preserve the loop closed ssa form.  The newly created block is returned.  */
 
-void
+basic_block
 split_loop_exit_edge (edge exit)
 {
   basic_block dest = exit->dest;
@@ -484,6 +483,8 @@ split_loop_exit_edge (edge exit)
       add_phi_arg (new_phi, name, exit);
       SET_USE (op_p, new_name);
     }
+
+  return bb;
 }
 
 /* Returns the basic block in that statements should be emitted for induction
@@ -585,9 +586,9 @@ tree_duplicate_loop_to_header_edge (struct loop *loop, edge e,
 {
   unsigned first_new_block;
 
-  if (!(current_loops->state & LOOPS_HAVE_SIMPLE_LATCHES))
+  if (!loops_state_satisfies_p (LOOPS_HAVE_SIMPLE_LATCHES))
     return false;
-  if (!(current_loops->state & LOOPS_HAVE_PREHEADERS))
+  if (!loops_state_satisfies_p (LOOPS_HAVE_PREHEADERS))
     return false;
 
 #ifdef ENABLE_CHECKING
@@ -1036,8 +1037,9 @@ tree_transform_and_unroll_loop (struct loop *loop, unsigned factor,
   new_nonexit->count = exit_bb->count - new_exit->count;
   if (new_nonexit->count < 0)
     new_nonexit->count = 0;
-  scale_bbs_frequencies_int (&loop->latch, 1, new_nonexit->probability,
-                            prob);
+  if (prob > 0)
+    scale_bbs_frequencies_int (&loop->latch, 1, new_nonexit->probability,
+                              prob);
 
   /* Finally create the new counter for number of iterations and add the new
      exit instruction.  */