IPA ICF pass 1/N

* gimple-iterator.h (gsi_next_nonvirtual_phi): New function.
	* ipa-prop.h (count_formal_params): Global function created from static.
	* ipa-prop.c (count_formal_params): Likewise.
	* ipa-utils.c (ipa_merge_profiles): Be more tolerant if we merge
	profiles for semantically equivalent functions.
	* passes.c (do_per_function): If we load body of a function
	during WPA, this condition should behave same.
	* varpool.c (ctor_for_folding): More tolerant assert for variable
	aliases created during WPA.

From-SVN: r213417

gcc/ChangeLog

@@ -1,3 +1,15 @@
+2014-08-01  Martin Liska  <mliska@suse.cz>
+
+	* gimple-iterator.h (gsi_next_nonvirtual_phi): New function.
+	* ipa-prop.h (count_formal_params): Global function created from static.
+	* ipa-prop.c (count_formal_params): Likewise.
+	* ipa-utils.c (ipa_merge_profiles): Be more tolerant if we merge
+	profiles for semantically equivalent functions.
+	* passes.c (do_per_function): If we load body of a function
+	during WPA, this condition should behave same.
+	* varpool.c (ctor_for_folding): More tolerant assert for variable
+	aliases created during WPA.
+
 2014-08-01  Martin Liska  <mliska@suse.cz>
 
 	* doc/invoke.texi (Options That Control Optimization): Documentation

gcc/gimple-iterator.h

@@ -281,6 +281,30 @@ gsi_last_nondebug_bb (basic_block bb)
   return i;
 }
 
+/* Iterates I statement iterator to the next non-virtual statement.  */
+
+static inline void
+gsi_next_nonvirtual_phi (gimple_stmt_iterator *i)
+{
+  gimple phi;
+
+  if (gsi_end_p (*i))
+    return;
+
+  phi = gsi_stmt (*i);
+  gcc_assert (phi != NULL);
+
+  while (virtual_operand_p (gimple_phi_result (phi)))
+    {
+      gsi_next (i);
+
+      if (gsi_end_p (*i))
+	return;
+
+      phi = gsi_stmt (*i);
+    }
+}
+
 /* Return the basic block associated with this iterator.  */
 
 static inline basic_block

gcc/ipa-prop.c

@@ -212,7 +212,7 @@ ipa_populate_param_decls (struct cgraph_node *node,
 
 /* Return how many formal parameters FNDECL has.  */
 
-static inline int
+int
 count_formal_params (tree fndecl)
 {
   tree parm;

gcc/ipa-prop.h

@@ -529,6 +529,7 @@ void ipa_free_all_edge_args (void);
 void ipa_free_all_structures_after_ipa_cp (void);
 void ipa_free_all_structures_after_iinln (void);
 void ipa_register_cgraph_hooks (void);
+int count_formal_params (tree fndecl);
 
 /* This function ensures the array of node param infos is big enough to
    accommodate a structure for all nodes and reallocates it if not.  */

gcc/ipa-utils.c

@@ -660,13 +660,8 @@ ipa_merge_profiles (struct cgraph_node *dst,
   if (dst->tp_first_run > src->tp_first_run && src->tp_first_run)
     dst->tp_first_run = src->tp_first_run;
 
-  if (src->profile_id)
-    {
-      if (!dst->profile_id)
-	dst->profile_id = src->profile_id;
-      else
-	gcc_assert (src->profile_id == dst->profile_id);
-    }
+  if (src->profile_id && !dst->profile_id)
+    dst->profile_id = src->profile_id;
 
   if (!dst->count)
     return;

gcc/passes.c

@@ -1478,7 +1478,7 @@ do_per_function (void (*callback) (function *, void *data), void *data)
     {
       struct cgraph_node *node;
       FOR_EACH_DEFINED_FUNCTION (node)
-	if (node->analyzed && gimple_has_body_p (node->decl)
+	if (node->analyzed && (gimple_has_body_p (node->decl) && !in_lto_p)
 	    && (!node->clone_of || node->decl != node->clone_of->decl))
 	  callback (DECL_STRUCT_FUNCTION (node->decl), data);
     }

gcc/varpool.c

@@ -405,6 +405,7 @@ ctor_for_folding (tree decl)
   if (decl != real_decl)
     {
       gcc_assert (!DECL_INITIAL (decl)
+		  || (node->alias && node->get_alias_target () == real_node)
 		  || DECL_INITIAL (decl) == error_mark_node);
       if (node->weakref)
 	{