tree-dfa.c (dump_variable): If the variable is a pointer SSA_NAME, also dump its…

tree-dfa.c (dump_variable): If the variable is a pointer SSA_NAME, also dump its points-to information.


	* tree-dfa.c (dump_variable): If the variable is a pointer
	SSA_NAME, also dump its points-to information.
	* tree-flow.h (struct ptr_info_def): Add field
	is_dereferenced.
	(dump_points_to_info_for): Declare.
	(debug_points_to_info_for): Declare.
	* tree-optimize.c (init_tree_optimization_passes): Add a
	second alias analysis pass after DOM2.
	Move pass_del_pta to a later spot.
	* tree-ssa-alias.c (compute_points_to_and_addr_escape): Do not
	create a name tags when we find a dereferenced pointer.  Just
	mark the pointer dereferenced.
	(collect_points_to_info_for): Move code to clear points-to
	information to create_name_tags.
	(create_name_tags): New function.
	(compute_flow_sensitive_aliasing): Call it.
	(setup_pointers_and_addressables): Mark type tags for renaming
	here instead of ...
	(create_memory_tag): ... here.
	(merge_pointed_to_info): Do not merge PT_MALLOC attributes.
	(dump_points_to_info_for): Declare extern.
	(debug_points_to_info_for): New function.

From-SVN: r84377

gcc/ChangeLog

+2004-07-09  Diego Novillo  <dnovillo@redhat.com>
+
+	* tree-dfa.c (dump_variable): If the variable is a pointer
+	SSA_NAME, also dump its points-to information.
+	* tree-flow.h (struct ptr_info_def): Add field
+	is_dereferenced.
+	(dump_points_to_info_for): Declare.
+	(debug_points_to_info_for): Declare.
+	* tree-optimize.c (init_tree_optimization_passes): Add a
+	second alias analysis pass after DOM2.
+	Move pass_del_pta to a later spot.
+	* tree-ssa-alias.c (compute_points_to_and_addr_escape): Do not
+	create a name tags when we find a dereferenced pointer.  Just
+	mark the pointer dereferenced.
+	(collect_points_to_info_for): Move code to clear points-to
+	information to create_name_tags.
+	(create_name_tags): New function.
+	(compute_flow_sensitive_aliasing): Call it.
+	(setup_pointers_and_addressables): Mark type tags for renaming
+	here instead of ...
+	(create_memory_tag): ... here.
+	(merge_pointed_to_info): Do not merge PT_MALLOC attributes.
+	(dump_points_to_info_for): Declare extern.
+	(debug_points_to_info_for): New function.
+
 2004-07-09  Paolo Bonzini  <bonzini@gnu.org>
 
 	* config/arc/arc.md: Switch to DFA-based scheduler description.

gcc/tree-dfa.c

@@ -534,6 +534,13 @@ void
 dump_variable (FILE *file, tree var)
 {
   var_ann_t ann;
+  
+  if (TREE_CODE (var) == SSA_NAME)
+    {
+      if (POINTER_TYPE_P (TREE_TYPE (var)))
+	dump_points_to_info_for (file, var);
+      var = SSA_NAME_VAR (var);
+    }
 
   if (var == NULL_TREE)
     {
@@ -542,9 +549,6 @@ dump_variable (FILE *file, tree var)
     }
 
   print_generic_expr (file, var, dump_flags);
-  
-  if (TREE_CODE (var) == SSA_NAME)
-    var = SSA_NAME_VAR (var);
 
   ann = var_ann (var);
 

gcc/tree-flow.h

@@ -59,6 +59,9 @@ struct ptr_info_def GTY(())
   /* Nonzero if the value of this pointer escapes the current function.  */
   unsigned int value_escapes_p : 1;
 
+  /* Nonzero if this pointer is dereferenced.  */
+  unsigned int is_dereferenced : 1;
+
   /* Set of variables that this pointer may point to.  */
   bitmap pt_vars;
 
@@ -550,6 +553,8 @@ extern void dump_alias_info (FILE *);
 extern void debug_alias_info (void);
 extern void dump_points_to_info (FILE *);
 extern void debug_points_to_info (void);
+extern void dump_points_to_info_for (FILE *, tree);
+extern void debug_points_to_info_for (tree);
 
 /* Call-back function for walk_use_def_chains().  At each reaching
    definition, a function with this prototype is called.  */

gcc/tree-optimize.c

@@ -294,7 +294,6 @@ init_tree_optimization_passes (void)
   NEXT_PASS (pass_may_alias);
   NEXT_PASS (pass_tail_recursion);
   NEXT_PASS (pass_ch);
-  NEXT_PASS (pass_del_pta);
   NEXT_PASS (pass_profile);
   NEXT_PASS (pass_lower_complex);
   NEXT_PASS (pass_sra);
@@ -303,6 +302,7 @@ init_tree_optimization_passes (void)
   NEXT_PASS (DUP_PASS (pass_redundant_phi));
   NEXT_PASS (DUP_PASS (pass_dce));
   NEXT_PASS (pass_dse);
+  NEXT_PASS (DUP_PASS (pass_may_alias));
   NEXT_PASS (DUP_PASS (pass_forwprop));
   NEXT_PASS (DUP_PASS (pass_phiopt));
   NEXT_PASS (pass_ccp);
@@ -320,6 +320,7 @@ init_tree_optimization_passes (void)
   NEXT_PASS (pass_tail_calls);
   NEXT_PASS (pass_late_warn_uninitialized);
   NEXT_PASS (pass_warn_function_return);
+  NEXT_PASS (pass_del_pta);
   NEXT_PASS (pass_del_ssa);
   NEXT_PASS (pass_nrv);
   NEXT_PASS (pass_remove_useless_vars);