2012-03-27 Richard Guenther <rguenther@suse.de>

[pf3gnuchains/gcc-fork.git] / gcc / tree-scalar-evolution.h

diff --git a/gcc/tree-scalar-evolution.h b/gcc/tree-scalar-evolution.h
index 54e543c..dd1bdfc 100644 (file)
--- a/gcc/tree-scalar-evolution.h
+++ b/gcc/tree-scalar-evolution.h
@@ -1,5 +1,6 @@
 /* Scalar evolution detector.
-   Copyright (C) 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009, 2010
+   Free Software Foundation, Inc.
    Contributed by Sebastian Pop <s.pop@laposte.net>
 
 This file is part of GCC.
@@ -23,20 +24,31 @@ along with GCC; see the file COPYING3.  If not see
 
 extern tree number_of_latch_executions (struct loop *);
 extern tree number_of_exit_cond_executions (struct loop *);
-extern tree get_loop_exit_condition (const struct loop *);
+extern gimple get_loop_exit_condition (const struct loop *);
 
 extern void scev_initialize (void);
 extern void scev_reset (void);
-extern void scev_reset_except_niters (void);
+extern void scev_reset_htab (void);
 extern void scev_finalize (void);
 extern tree analyze_scalar_evolution (struct loop *, tree);
-extern tree instantiate_scev (struct loop *, 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);
-unsigned int 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);
 
-extern bool simple_iv (struct loop *, tree, tree, affine_iv *, bool);
+/* Returns the basic block preceding LOOP or ENTRY_BLOCK_PTR when the
+   loop is function's body.  */
+
+static inline basic_block
+block_before_loop (loop_p loop)
+{
+  edge preheader = loop_preheader_edge (loop);
+  return (preheader ? preheader->src : ENTRY_BLOCK_PTR);
+}
 
 /* Analyze all the parameters of the chrec that were left under a
    symbolic form.  LOOP is the loop in which symbolic names have to
@@ -45,7 +57,7 @@ extern bool simple_iv (struct loop *, tree, tree, affine_iv *, bool);
 static inline tree
 instantiate_parameters (struct loop *loop, tree chrec)
 {
-  return instantiate_scev (loop, loop, chrec);
+  return instantiate_scev (block_before_loop (loop), loop, chrec);
 }
 
 /* Returns the loop of the polynomial chrec CHREC.  */