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[pf3gnuchains/gcc-fork.git] / gcc / tree-ssa-propagate.h

diff --git a/gcc/tree-ssa-propagate.h b/gcc/tree-ssa-propagate.h
index 1813378..e8f4f03 100644 (file)
--- a/gcc/tree-ssa-propagate.h
+++ b/gcc/tree-ssa-propagate.h
@@ -1,6 +1,6 @@
 /* Data structures and function declarations for the SSA value propagation
    engine.
-   Copyright (C) 2004, 2005, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
    Contributed by Diego Novillo <dnovillo@redhat.com>
 
 This file is part of GCC.
@@ -22,9 +22,21 @@ along with GCC; see the file COPYING3.  If not see
 #ifndef _TREE_SSA_PROPAGATE_H
 #define _TREE_SSA_PROPAGATE_H 1
 
-/* Use the TREE_VISITED bitflag to mark statements and PHI nodes that
-   have been deemed varying and should not be simulated again.  */
-#define DONT_SIMULATE_AGAIN(T) TREE_VISITED (T)
+/* If SIM_P is true, statement S will be simulated again.  */
+
+static inline void
+prop_set_simulate_again (gimple s, bool visit_p)
+{
+  gimple_set_visited (s, visit_p);
+}
+
+/* Return true if statement T should be simulated again.  */
+
+static inline bool
+prop_simulate_again_p (gimple s)
+{
+  return gimple_visited_p (s);
+}
 
 /* Lattice values used for propagation purposes.  Specific instances
    of a propagation engine must return these values from the statement
@@ -57,16 +69,6 @@ struct prop_value_d {
 
     /* Propagated value.  */
     tree value;
-
-    /* If this value is held in an SSA name for a non-register
-       variable, this field holds the actual memory reference
-       associated with this value.  This field is taken from 
-       the LHS of the assignment that generated the associated SSA
-       name.  However, in the case of PHI nodes, this field is copied
-       from the PHI arguments (assuming that all the arguments have
-       the same memory reference).  See replace_vuses_in for a more
-       detailed description.  */
-    tree mem_ref;
 };
 
 typedef struct prop_value_d prop_value_t;
@@ -106,20 +108,18 @@ typedef struct value_range_d value_range_t;
 
 
 /* Call-back functions used by the value propagation engine.  */
-typedef enum ssa_prop_result (*ssa_prop_visit_stmt_fn) (tree, edge *, tree *);
-typedef enum ssa_prop_result (*ssa_prop_visit_phi_fn) (tree);
+typedef enum ssa_prop_result (*ssa_prop_visit_stmt_fn) (gimple, edge *, tree *);
+typedef enum ssa_prop_result (*ssa_prop_visit_phi_fn) (gimple);
+typedef bool (*ssa_prop_fold_stmt_fn) (gimple_stmt_iterator *gsi);
 
 
 /* In tree-ssa-propagate.c  */
 void ssa_propagate (ssa_prop_visit_stmt_fn, ssa_prop_visit_phi_fn);
-tree get_rhs (tree);
-bool valid_gimple_expression_p (tree expr);
-bool set_rhs (tree *, tree);
-tree first_vdef (tree);
-bool stmt_makes_single_load (tree);
-bool stmt_makes_single_store (tree);
-prop_value_t *get_value_loaded_by (tree, prop_value_t *);
-bool replace_uses_in (tree, bool *, prop_value_t *);
-bool substitute_and_fold (prop_value_t *, bool);
+bool valid_gimple_rhs_p (tree);
+bool valid_gimple_call_p (tree);
+void move_ssa_defining_stmt_for_defs (gimple, gimple);
+bool update_call_from_tree (gimple_stmt_iterator *, tree);
+bool stmt_makes_single_store (gimple);
+bool substitute_and_fold (prop_value_t *, ssa_prop_fold_stmt_fn);
 
 #endif /* _TREE_SSA_PROPAGATE_H  */