2007-11-05 H.J. Lu <hongjiu.lu@intel.com>

[pf3gnuchains/gcc-fork.git] / gcc / cfgloopanal.c

diff --git a/gcc/cfgloopanal.c b/gcc/cfgloopanal.c
index 53d36d9..c00d1c5 100644 (file)
--- a/gcc/cfgloopanal.c
+++ b/gcc/cfgloopanal.c
@@ -1,11 +1,11 @@
 /* Natural loop analysis code for GNU compiler.
-   Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
 
 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 later
+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 ANY
@@ -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"
@@ -34,7 +33,7 @@ Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
 /* Checks whether BB is executed exactly once in each LOOP iteration.  */
 
 bool
-just_once_each_iteration_p (const struct loop *loop, basic_block bb)
+just_once_each_iteration_p (const struct loop *loop, const_basic_block bb)
 {
   /* It must be executed at least once each iteration.  */
   if (!dominated_by_p (CDI_DOMINATORS, loop->latch, bb))
@@ -157,12 +156,12 @@ mark_irreducible_loops (void)
 
   free_graph (g);
 
-  current_loops->state |= LOOPS_HAVE_MARKED_IRREDUCIBLE_REGIONS;
+  loops_state_set (LOOPS_HAVE_MARKED_IRREDUCIBLE_REGIONS);
 }
 
 /* Counts number of insns inside LOOP.  */
 int
-num_loop_insns (struct loop *loop)
+num_loop_insns (const struct loop *loop)
 {
   basic_block *bbs, bb;
   unsigned i, ninsns = 0;
@@ -184,7 +183,7 @@ num_loop_insns (struct loop *loop)
 
 /* Counts number of insns executed on average per iteration LOOP.  */
 int
-average_num_loop_insns (struct loop *loop)
+average_num_loop_insns (const struct loop *loop)
 {
   basic_block *bbs, bb;
   unsigned i, binsns, ninsns, ratio;
@@ -295,7 +294,7 @@ get_loop_level (const struct loop *loop)
 /* Returns estimate on cost of computing SEQ.  */
 
 static unsigned
-seq_cost (rtx seq)
+seq_cost (const_rtx seq)
 {
   unsigned cost = 0;
   rtx set;
@@ -335,6 +334,7 @@ init_set_costs (void)
   rtx mem = validize_mem (gen_rtx_MEM (SImode, addr));
   unsigned i;
 
+  target_avail_regs = 0;
   for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
     if (TEST_HARD_REG_BIT (reg_class_contents[GENERAL_REGS], i)
        && !fixed_regs[i])