re PR c++/51992 (internal compiler error: tree code ‘target_expr’ is not supported in LTO streams)

	PR c++/51992
	* tree.c (find_decls_types_in_node): Walk gimple_call_fntype.

From-SVN: r183527

gcc/ChangeLog

+2012-01-25  Jason Merrill  <jason@redhat.com>
+
+	PR c++/51992
+	* tree.c (find_decls_types_in_node): Walk gimple_call_fntype.
+
 2012-01-25  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/51987

gcc/testsuite/ChangeLog

+2012-01-25  Jason Merrill  <jason@redhat.com>
+
+	PR c++/51992
+	* g++.dg/lto/pr51992_0.C: New.
+
 2012-01-25  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/51987

gcc/testsuite/g++.dg/lto/pr51992_0.C

+// PR c++/51992
+// { dg-lto-do assemble }
+
+template<typename Enum>
+class QFlags
+{
+    int i;
+    inline QFlags(Enum f) : i(f) {}
+};
+class QString {};
+class KComponentData;
+class KConfig
+{
+public:
+    enum OpenFlag {
+        IncludeGlobals = 0x01,
+	CascadeConfig = 0x02,
+	FullConfig = IncludeGlobals|CascadeConfig
+    };
+    typedef QFlags<OpenFlag> OpenFlags;
+};
+template <class T>
+class KSharedPtr {};
+class KSharedConfig : public KConfig
+{
+public:
+  typedef KSharedPtr<KSharedConfig> Ptr;
+    static KSharedConfig::Ptr openConfig(const QString& fileName = QString(),
+				         OpenFlags mode = FullConfig,
+					 const char *resourceType = "config");
+    static KSharedConfig::Ptr openConfig(const KComponentData &componentData,
+				         const QString &fileName = QString(),
+                                         OpenFlags mode = FullConfig,
+					 const char *resourceType = "config");
+};
+typedef KSharedConfig::Ptr KSharedConfigPtr;
+namespace KGlobal
+{
+    KComponentData &mainComponent();
+};
+KSharedConfigPtr KSharedConfig::openConfig(const QString& fileName,
+                                           OpenFlags flags,
+                                           const char *resType)
+{
+    return openConfig(KGlobal::mainComponent(), fileName, flags, resType);
+}
+KSharedConfigPtr KSharedConfig::openConfig(const KComponentData &componentData,
+                                           const QString& fileName,
+                                           OpenFlags flags,
+                                           const char *resType)
+{
+    return KSharedConfigPtr();
+}

gcc/tree.c

@@ -5037,6 +5037,9 @@ find_decls_types_in_node (struct cgraph_node *n, struct free_lang_data_d *fld)
 	{
 	  gimple stmt = gsi_stmt (si);
 
+	  if (is_gimple_call (stmt))
+	    find_decls_types (gimple_call_fntype (stmt), fld);
+
 	  for (i = 0; i < gimple_num_ops (stmt); i++)
 	    {
 	      tree arg = gimple_op (stmt, i);