re PR c++/52247 (ICE with asm goto)

	PR c++/52247
	* pt.c (tsubst_copy_asm_operands): For LABEL_DECL values call
	lookup_label on label's name and set TREE_USED.

	* g++.dg/template/asmgoto1.C: New test.

From-SVN: r184229

gcc/cp/ChangeLog

+2012-02-14  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/52247
+	* pt.c (tsubst_copy_asm_operands): For LABEL_DECL values call
+	lookup_label on label's name and set TREE_USED.
+
 2012-02-14  Jason Merrill  <jason@redhat.com>
 
 	PR c++/39055

gcc/cp/pt.c

@@ -12612,8 +12612,17 @@ tsubst_copy_asm_operands (tree t, tree args, tsubst_flags_t complain,
   if (purpose)
     purpose = RECUR (purpose);
   value = TREE_VALUE (t);
-  if (value && TREE_CODE (value) != LABEL_DECL)
-    value = RECUR (value);
+  if (value)
+    {
+      if (TREE_CODE (value) != LABEL_DECL)
+	value = RECUR (value);
+      else
+	{
+	  value = lookup_label (DECL_NAME (value));
+	  gcc_assert (TREE_CODE (value) == LABEL_DECL);
+	  TREE_USED (value) = 1;
+	}
+    }
   chain = TREE_CHAIN (t);
   if (chain && chain != void_type_node)
     chain = RECUR (chain);

gcc/testsuite/ChangeLog

+2012-02-14  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/52247
+	* g++.dg/template/asmgoto1.C: New test.
+
 2012-02-14  Ian Lance Taylor  <iant@google.com>
 
 	PR go/48501

gcc/testsuite/g++.dg/template/asmgoto1.C

+// PR c++/52247
+// { dg-do compile }
+
+template <int N>
+bool
+bar ()
+{
+  __asm goto ("" : : : : lab);
+  return true;
+lab:
+  return false;
+}
+
+bool
+foo ()
+{
+  return bar<0> ();
+}