re PR c++/27100 (ICE with multiple friend declarations)

Fix PR c++/27100

gcc/cp/ChangeLog:

	PR c++/27100
	* decl.c (duplicate_decls): Properly copy the
	DECL_PENDING_INLINE_P, DECL_PENDING_INLINE_INFO and
	DECL_SAVED_FUNCTION_DATA fields from OLDDECL to NEWDECL.

gcc/testsuite/ChangeLog:

	PR c++/27100
	* g++.dg/other/friend6.C: New test.

From-SVN: r237078

gcc/cp/ChangeLog

@@ -1,3 +1,10 @@
+2016-06-03  Patrick Palka  <ppalka@gcc.gnu.org>
+
+	PR c++/27100
+	* decl.c (duplicate_decls): Properly copy the
+	DECL_PENDING_INLINE_P, DECL_PENDING_INLINE_INFO and
+	DECL_SAVED_FUNCTION_DATA fields from OLDDECL to NEWDECL.
+
 2016-06-03  Chung-Lin Tang  <cltang@codesourcery.com>
 
 	* semantics.c (finish_omp_clauses): Mark OpenACC reduction

gcc/cp/decl.c

@@ -2351,8 +2351,17 @@ duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
 	}
       else
 	{
-	  if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
+	  if (DECL_PENDING_INLINE_P (olddecl))
-	    DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
+	    {
+	      DECL_PENDING_INLINE_P (newdecl) = 1;
+	      DECL_PENDING_INLINE_INFO (newdecl)
+		= DECL_PENDING_INLINE_INFO (olddecl);
+	    }
+	  else if (DECL_PENDING_INLINE_P (newdecl))
+	    ;
+	  else if (DECL_SAVED_FUNCTION_DATA (newdecl) == NULL)
+	    DECL_SAVED_FUNCTION_DATA (newdecl)
+	      = DECL_SAVED_FUNCTION_DATA (olddecl);
 
 	  DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
 

gcc/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2016-06-03  Patrick Palka  <ppalka@gcc.gnu.org>
+
+	PR c++/27100
+	* g++.dg/other/friend6.C: New test.
+
 2016-06-03  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
 
 	* g++.dg/torture/ppc-ldst-array.C: New.

gcc/testsuite/g++.dg/other/friend6.C

@@ -0,0 +1,15 @@
+// PR c++/27100
+// This used to fail at link time with an "undefined reference to 'foo'" error.
+// { dg-do run }
+
+struct A
+{
+  friend void foo (const A&) { }
+  friend void foo (const A&);
+};
+
+int
+main ()
+{
+  foo (A ());
+}