ipa-devirt.c (odr_subtypes_equivalent_p): Compare TYPE_NAME only for aggregate types.

	* ipa-devirt.c (odr_subtypes_equivalent_p): Compare TYPE_NAME only
	for aggregate types.
	(register_odr_type): Be ready for MAIN_VARIANT of ODR type
	type to be non_ODR.
	* tree.c (need_assembler_name_p): Compute mangled name for
	non-fundamental types and integer types.

From-SVN: r222609

gcc/ChangeLog

+2015-04-29  Jan Hubicka  <hubicka@ucw.cz>
+
+	* ipa-devirt.c (odr_subtypes_equivalent_p): Compare TYPE_NAME only
+	for aggregate types.
+	(register_odr_type): Be ready for MAIN_VARIANT of ODR type
+	type to be non_ODR.
+	* tree.c (need_assembler_name_p): Compute mangled name for
+	non-fundamental types and integer types.
+
 2015-04-29  Mikhail Maltsev  <maltsevm@gmail.com>
 
 	* dojump.c (do_compare_rtx_and_jump): Use std::swap instead of

gcc/ipa-devirt.c

@@ -675,7 +675,8 @@ odr_subtypes_equivalent_p (tree t1, tree t2,
      have to be compared structurally.  */
   if (TREE_CODE (t1) != TREE_CODE (t2))
     return false;
-  if ((TYPE_NAME (t1) == NULL_TREE) != (TYPE_NAME (t2) == NULL_TREE))
+  if (AGGREGATE_TYPE_P (t1)
+      && (TYPE_NAME (t1) == NULL_TREE) != (TYPE_NAME (t2) == NULL_TREE))
     return false;
 
   type_pair pair={t1,t2};
@@ -2029,10 +2030,14 @@ register_odr_type (tree type)
       if (in_lto_p)
         odr_vtable_hash = new odr_vtable_hash_type (23);
     }
-  /* Arrange things to be nicer and insert main variants first.  */
-  if (odr_type_p (TYPE_MAIN_VARIANT (type)))
+  /* Arrange things to be nicer and insert main variants first.
+     ??? fundamental prerecorded types do not have mangled names; this
+     makes it possible that non-ODR type is main_odr_variant of ODR type.
+     Things may get smoother if LTO FE set mangled name of those types same
+     way as C++ FE does.  */
+  if (odr_type_p (main_odr_variant (TYPE_MAIN_VARIANT (type))))
     get_odr_type (TYPE_MAIN_VARIANT (type), true);
-  if (TYPE_MAIN_VARIANT (type) != type)
+  if (TYPE_MAIN_VARIANT (type) != type && odr_type_p (main_odr_variant (type)))
     get_odr_type (type, true);
 }
 

gcc/tree.c

@@ -5145,7 +5145,17 @@ need_assembler_name_p (tree decl)
       && DECL_NAME (decl)
       && decl == TYPE_NAME (TREE_TYPE (decl))
       && !is_lang_specific (TREE_TYPE (decl))
-      && AGGREGATE_TYPE_P (TREE_TYPE (decl))
+      /* Save some work. Names of builtin types are always derived from
+	 properties of its main variant.  A special case are integer types
+	 where mangling do make differences between char/signed char/unsigned
+	 char etc.  Storing name for these makes e.g.
+	 -fno-signed-char/-fsigned-char mismatches to be handled well.
+
+	 See cp/mangle.c:write_builtin_type for details.  */
+      && (TREE_CODE (TREE_TYPE (decl)) != VOID_TYPE
+	  && TREE_CODE (TREE_TYPE (decl)) != BOOLEAN_TYPE
+	  && TREE_CODE (TREE_TYPE (decl)) != REAL_TYPE
+	  && TREE_CODE (TREE_TYPE (decl)) != FIXED_POINT_TYPE)
       && !TYPE_ARTIFICIAL (TREE_TYPE (decl))
       && !variably_modified_type_p (TREE_TYPE (decl), NULL_TREE)
       && !type_in_anonymous_namespace_p (TREE_TYPE (decl)))