re PR ipa/64982 (Many g++ failures on x86_64-apple-darwin14 with -m32.)

	PR ipa/64982
	* cgraphunit.c (cgraph_node::expand_thunk): Look for stdarg
	thunks.
	* method.c (use_thunk): Do not check for stdarg thunks.

From-SVN: r220587

gcc/ChangeLog

+2015-02-10  Jan Hubicka  <hubicka@ucw.cz>
+
+	PR ipa/64982
+	* cgraphunit.c (cgraph_node::expand_thunk): Look for stdarg
+	thunks.
+
 2015-02-10  Trevor Saunders  <tsaunders@mozilla.com>
 
 	PR tree-optimization/64326

gcc/cgraphunit.c

@@ -1559,6 +1559,14 @@ cgraph_node::expand_thunk (bool output_asm_thunks, bool force_gimple_thunk)
       thunk.thunk_p = false;
       analyzed = false;
     }
+  else if (stdarg_p (TREE_TYPE (thunk_fndecl)))
+    {
+      error ("generic thunk code fails for method %qD which uses %<...%>",
+	     thunk_fndecl);
+      TREE_ASM_WRITTEN (thunk_fndecl) = 1;
+      analyzed = true;
+      return false;
+    }
   else
     {
       tree restype;

gcc/cp/ChangeLog

+2015-02-10  Jan Hubicka  <hubicka@ucw.cz>
+
+	PR ipa/64982
+	* method.c (use_thunk): Do not check for stdarg thunks.
+
 2015-02-06  Jason Merrill  <jason@redhat.com>
 
 	PR c++/64899

gcc/cp/method.c

@@ -418,20 +418,6 @@ use_thunk (tree thunk_fndecl, bool emit_p)
   if (DECL_ONE_ONLY (function))
     thunk_node->add_to_same_comdat_group (funcn);
 
-  if (!this_adjusting
-      || !targetm.asm_out.can_output_mi_thunk (thunk_fndecl, fixed_offset,
-					       virtual_value, alias))
-    {
-      /* If this is a covariant thunk, or we don't have the necessary
-	 code for efficient thunks, generate a thunk function that
-	 just makes a call to the real function.  Unfortunately, this
-	 doesn't work for varargs.  */
-
-      if (varargs_function_p (function))
-	error ("generic thunk code fails for method %q#D which uses %<...%>",
-	       function);
-    }
-
   pop_from_top_level ();
 }