re PR c++/66748 (Crash with abi_tag attribute)

	PR c++/66748
	* tree.c (handle_abi_tag_attribute): Check for CLASS_TYPE_P before
	accessing TYPE_LANG_SPECIFIC node.

	* g++.dg/abi/abi-tag15.C: New test.

From-SVN: r225541

gcc/cp/ChangeLog

+2015-07-08  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/66748
+	* tree.c (handle_abi_tag_attribute): Check for CLASS_TYPE_P before
+	accessing TYPE_LANG_SPECIFIC node.
+
 2015-07-07  Andrew MacLeod  <amacleod@redhat.com>
 
 	* call.c: Adjust includes.

gcc/cp/tree.c

@@ -3653,13 +3653,15 @@ handle_abi_tag_attribute (tree* node, tree name, tree args,
 		 name, *node);
 	  goto fail;
 	}
-      else if (CLASSTYPE_TEMPLATE_INSTANTIATION (*node))
+      else if (CLASS_TYPE_P (*node)
+	       && CLASSTYPE_TEMPLATE_INSTANTIATION (*node))
 	{
 	  warning (OPT_Wattributes, "ignoring %qE attribute applied to "
 		   "template instantiation %qT", name, *node);
 	  goto fail;
 	}
-      else if (CLASSTYPE_TEMPLATE_SPECIALIZATION (*node))
+      else if (CLASS_TYPE_P (*node)
+	       && CLASSTYPE_TEMPLATE_SPECIALIZATION (*node))
 	{
 	  warning (OPT_Wattributes, "ignoring %qE attribute applied to "
 		   "template specialization %qT", name, *node);

gcc/testsuite/ChangeLog

+2015-07-08  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/66748
+	* g++.dg/abi/abi-tag15.C: New test.
+
 2015-07-08  Andrew Bennett  <andrew.bennett@imgtec.com>
 
 	* gcc.target/mips/branch-2.c: Change NOMIPS16 to NOCOMPRESSION.

gcc/testsuite/g++.dg/abi/abi-tag15.C

+// PR c++/66748
+
+enum __attribute__((abi_tag("foo"))) E {}; // { dg-error "redeclaration of" }