PR c++/80831 - ICE with -fsyntax-only.

	* decl2.c (c_parse_final_cleanups): Use cgraph_node::get_create.

From-SVN: r249318

gcc/cp/ChangeLog

 2017-06-16  Jason Merrill  <jason@redhat.com>
 
+	PR c++/80831 - ICE with -fsyntax-only.
+	* decl2.c (c_parse_final_cleanups): Use cgraph_node::get_create.
+
 	PR c++/80639 - ICE with invalid PMF initialization.
 	PR c++/80043 - ICE with -fpermissive
 	* typeck.c (convert_for_assignment): Recurse when instantiate_type

gcc/cp/decl2.c

@@ -4627,6 +4627,8 @@ c_parse_final_cleanups (void)
 	  if (!DECL_SAVED_TREE (decl))
 	    continue;
 
+	  cgraph_node *node = cgraph_node::get_create (decl);
+
 	  /* We lie to the back end, pretending that some functions
 	     are not defined when they really are.  This keeps these
 	     functions from being put out unnecessarily.  But, we must
@@ -4647,9 +4649,6 @@ c_parse_final_cleanups (void)
 	      && DECL_INITIAL (decl)
 	      && decl_needed_p (decl))
 	    {
-	      struct cgraph_node *node, *next;
-
-	      node = cgraph_node::get (decl);
 	      if (node->cpp_implicit_alias)
 		node = node->get_alias_target ();
 
@@ -4659,7 +4658,8 @@ c_parse_final_cleanups (void)
 		 group, we need to mark all symbols in the same comdat group
 		 that way.  */
 	      if (node->same_comdat_group)
-		for (next = dyn_cast<cgraph_node *> (node->same_comdat_group);
+		for (cgraph_node *next
+		       = dyn_cast<cgraph_node *> (node->same_comdat_group);
 		     next != node;
 		     next = dyn_cast<cgraph_node *> (next->same_comdat_group))
 		  next->call_for_symbol_thunks_and_aliases (clear_decl_external,
@@ -4673,7 +4673,7 @@ c_parse_final_cleanups (void)
 	  if (!DECL_EXTERNAL (decl)
 	      && decl_needed_p (decl)
 	      && !TREE_ASM_WRITTEN (decl)
-	      && !cgraph_node::get (decl)->definition)
+	      && !node->definition)
 	    {
 	      /* We will output the function; no longer consider it in this
 		 loop.  */

gcc/testsuite/g++.dg/other/fsyntax-only1.C

+// PR c++/80831
+// { dg-options -fsyntax-only }
+// { dg-do compile { target c++11 } }
+
+class A
+{
+public:
+    virtual ~A() { }
+};
+
+class B { };
+
+class C : public A { };
+
+template<class J>
+class D : public C
+{
+public:
+    D() { }
+    ~D() { }
+};
+
+class E
+{
+public:
+    static E& p();
+    B q();
+    template<class J>
+    B q(void (J::*r)())
+    {
+        new D<J>();
+        return q();
+    }
+};
+
+void t()
+{
+  class F
+  {
+  public:
+    virtual void s() { }
+  };
+  E& x = E::p();
+  B y = x.q(&F::s);
+}