re PR c++/52582 (g++ ICE when compiling qt-4.8.0 with -O2 on PPC (32bit))

	PR c++/52582
	* method.c (implicitly_declare_fn): Set DECL_EXTERNAL.

From-SVN: r185443

gcc/cp/ChangeLog

+2012-03-15  Jason Merrill  <jason@redhat.com>
+
+	PR c++/52582
+	* method.c (implicitly_declare_fn): Set DECL_EXTERNAL.
+
 2012-03-15  Manuel López-Ibáñez  <manu@gcc.gnu.org>
 
 	PR c++/44783

gcc/cp/method.c

@@ -1593,6 +1593,7 @@ implicitly_declare_fn (special_function_kind kind, tree type, bool const_p)
       DECL_DELETED_FN (fn) = deleted_p;
       DECL_DECLARED_CONSTEXPR_P (fn) = constexpr_p;
     }
+  DECL_EXTERNAL (fn) = true;
   DECL_NOT_REALLY_EXTERN (fn) = 1;
   DECL_DECLARED_INLINE_P (fn) = 1;
   gcc_assert (!TREE_USED (fn));

gcc/testsuite/ChangeLog

+2012-03-15  Jason Merrill  <jason@redhat.com>
+
+	* g++.dg/torture/pr52582.C: New.
+
 2012-03-15  Bernhard Reutner-Fischer  <aldot@gcc.gnu.org>
 
 	* lib/fortran-modules.exp: New file which was forgotten in r185430.

gcc/testsuite/g++.dg/torture/pr52582.C

+// PR c++/52582
+
+inline void *operator new (__SIZE_TYPE__, void *p) throw ()
+{
+  return p;
+}
+struct B
+{
+  virtual ~B ();
+  B ();
+};
+struct A : B
+{
+  A () : B () {}
+  virtual void bar ();
+};
+void
+foo ()
+{
+  char a[64];
+  B *b = new (&a) A ();
+  b->~B ();
+}