* decl.c (grokdeclarator): Undo 1998-12-14 change.

	* tree.c (build_cplus_array_type_1): Likewise.
	* pt.c (instantiate_class_template): Remove misleading comment.
	(tsubst_aggr_type): Substitute if there are template parameters,
	regardless of whether or not they use template arguments.
	(unify): Likewise, but for unification.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@24656 138bc75d-0d04-0410-961f-82ee72b054a4

gcc/cp/ChangeLog

+1999-01-13  Mark Mitchell  <mark@markmitchell.com>
+
+	* decl.c (grokdeclarator): Undo 1998-12-14 change.
+	* tree.c (build_cplus_array_type_1): Likewise.
+	* pt.c (instantiate_class_template): Remove misleading comment.
+	(tsubst_aggr_type): Substitute if there are template parameters,
+	regardless of whether or not they use template arguments.
+	(unify): Likewise, but for unification.
+
 1999-01-12  Richard Henderson  <rth@cygnus.com>
 
 	* cp-tree.h (flag_permissive): Declare extern.

gcc/cp/decl.c

@@ -9890,9 +9890,13 @@ grokdeclarator (declarator, declspecs, decl_context, initialized, attrlist)
 		    && TREE_TYPE (size) == TREE_TYPE (TREE_OPERAND (size, 0)))
 		  size = TREE_OPERAND (size, 0);
 
-		/* If this involves a template parameter, it'll be
-		   constant, but we don't know what the value is yet.  */
-		if (uses_template_parms (size))
+		/* If this involves a template parameter, it will be a
+		   constant at instantiation time, but we don't know
+		   what the value is yet.  Even if no template
+		   parameters are involved, we may an expression that
+		   is not a constant; we don't even simplify `1 + 2'
+		   when processing a template.  */
+		if (processing_template_decl)
 		  {
 		    /* Resolve a qualified reference to an enumerator or
 		       static const data member of ours.  */

gcc/cp/pt.c

@@ -4475,9 +4475,7 @@ instantiate_class_template (type)
          struct S<int> {};
 
        Now, the `S<U>' in `f<int>' is the specialization, not an
-       instantiation of the original template.  Mark the type as
-       complete, in the same way that we do for a definition of a
-       template class.  */
+       instantiation of the original template.  */
     goto end;
 
   /* Determine what specialization of the original template to
@@ -5043,7 +5041,7 @@ tsubst_aggr_type (t, args, in_decl, entering_scope)
       /* else fall through */
     case ENUMERAL_TYPE:
     case UNION_TYPE:
-      if (uses_template_parms (t))
+      if (TYPE_TEMPLATE_INFO (t))
 	{
 	  tree argvec;
 	  tree context;
@@ -7671,7 +7669,7 @@ unify (tparms, targs, parm, arg, strict, explicit_mask)
       if (TREE_CODE (arg) != TREE_CODE (parm))
 	return 1;
   
-      if (CLASSTYPE_TEMPLATE_INFO (parm) && uses_template_parms (parm))
+      if (CLASSTYPE_TEMPLATE_INFO (parm))
 	{
 	  tree t = NULL_TREE;
 	  if (strict & UNIFY_ALLOW_DERIVED)

gcc/cp/tree.c

@@ -416,8 +416,7 @@ build_cplus_array_type_1 (elt_type, index_type)
       saveable_obstack = &permanent_obstack;
     }
 
-  if (uses_template_parms (elt_type)
-      || uses_template_parms (index_type))
+  if (processing_template_decl)
     {
       t = make_node (ARRAY_TYPE);
       TREE_TYPE (t) = elt_type;

gcc/testsuite/g++.old-deja/g++.pt/crash25.C

+// Build don't link:
+
+template <class T>
+void f()
+{
+  int i[1 << 3];
+}