X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Ftree-scalar-evolution.h;h=e09e19ae5f59d742be41d2e31c3d9ba6955ff12e;hb=8135a42b49e8d0cffae093b782b3636838b363ca;hp=0fecaee2390ec1fb2fe3d4754ce3f6ad5b207559;hpb=553b952322f47e716baf4dd29392d4ab8bc94f98;p=pf3gnuchains%2Fgcc-fork.git

diff --git a/gcc/tree-scalar-evolution.h b/gcc/tree-scalar-evolution.h
index 0fecaee2390..e09e19ae5f5 100644
--- a/gcc/tree-scalar-evolution.h
+++ b/gcc/tree-scalar-evolution.h
@@ -1,12 +1,12 @@
 /* Scalar evolution detector.
-   Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009 Free Software Foundation, Inc.
    Contributed by Sebastian Pop <s.pop@laposte.net>
 
 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
@@ -15,36 +15,56 @@ 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/>.  */
 
 #ifndef GCC_TREE_SCALAR_EVOLUTION_H
 #define GCC_TREE_SCALAR_EVOLUTION_H
 
-extern tree number_of_iterations_in_loop (struct loop *);
-extern tree get_loop_exit_condition (struct loop *);
+extern tree number_of_latch_executions (struct loop *);
+extern tree number_of_exit_cond_executions (struct loop *);
+extern gimple get_loop_exit_condition (const struct loop *);
 
-extern void scev_initialize (struct loops *loops);
+extern void scev_initialize (void);
 extern void scev_reset (void);
+extern void scev_reset_htab (void);
 extern void scev_finalize (void);
 extern tree analyze_scalar_evolution (struct loop *, tree);
-extern tree instantiate_parameters (struct loop *, tree);
+extern tree instantiate_scev (basic_block, struct loop *, tree);
+extern tree resolve_mixers (struct loop *, tree);
 extern void gather_stats_on_scev_database (void);
 extern void scev_analysis (void);
-void scev_const_prop (void);
+extern unsigned int scev_const_prop (void);
+extern bool expression_expensive_p (tree);
+extern bool simple_iv (struct loop *, struct loop *, tree, affine_iv *, bool);
+extern tree compute_overall_effect_of_inner_loop (struct loop *, tree);
 
-/* Affine iv.  */
+/* Returns the basic block preceding LOOP or ENTRY_BLOCK_PTR when the
+   loop is function's body.  */
 
-typedef struct
+static inline basic_block
+block_before_loop (loop_p loop)
 {
-  /* Iv = BASE + STEP * i.  */
-  tree base, step;
+  edge preheader = loop_preheader_edge (loop);
+  return (preheader ? preheader->src : ENTRY_BLOCK_PTR);
+}
 
-  /* True if this iv does not overflow.  */
-  bool no_overflow;
-} affine_iv;
+/* Analyze all the parameters of the chrec that were left under a
+   symbolic form.  LOOP is the loop in which symbolic names have to
+   be analyzed and instantiated.  */
 
-extern bool simple_iv (struct loop *, tree, tree, affine_iv *, bool);
+static inline tree
+instantiate_parameters (struct loop *loop, tree chrec)
+{
+  return instantiate_scev (block_before_loop (loop), loop, chrec);
+}
+
+/* Returns the loop of the polynomial chrec CHREC.  */
+
+static inline struct loop *
+get_chrec_loop (const_tree chrec)
+{
+  return get_loop (CHREC_VARIABLE (chrec));
+}
 
 #endif  /* GCC_TREE_SCALAR_EVOLUTION_H  */