tree.h (DECL_UNINLINABLE): Move from C++ frontend.

        * tree.h (DECL_UNINLINABLE): Move from C++ frontend.
        (struct tree_decl): Add uninlinable bitfield.
        * c-decl.c (duplicate_decls): Set it.
        * integrate.c (function_cannot_inline_p): Check it.
        * cp-tree.h (struct lang_decl_flags): Remove uninlinable flag.
        (DECL_UNINLINABLE): Move to middle-end.

        * dwarf2out.c (add_name_and_src_coords_attributes): Don't add
        DW_AT_MIPS_linkage_name to abstract methods.
        (dwarf2out_abstract_function): Emit class context before calling
        set_decl_abstract_flags.  Don't clear DECL_ABSTRACT.
        (gen_subprogram_die): Remove obsolete code.
        (gen_member_die): Don't include clones in the member list.
        (gen_decl_die): Emit abstract info for clone origin.
        * dwarfout.c (output_type): Don't include clones in the member list.
        * dbxout.c (dbxout_type_methods): Ignore abstract methods.
        * toplev.c (note_deferral_of_defined_inline_function): Don't clear
        DECL_ABSTRACT on a function that already has it set.
        * class.c (clone_function_decl): Set DECL_ABSTRACT on original fn.
        * decl.c (duplicate_decls): Preserve DECL_ABSTRACT.
        * class.c (build_clone): Set DECL_ABSTRACT_ORIGIN for the clone.
        * optimize.c (maybe_clone_body): Set DECL_ABSTRACT_ORIGIN for the
        parms and outer BLOCK.  note_deferral_of_defined_inline_function.

        * dwarf2out.c (gen_formal_types_die): Also accept a FUNCTION_DECL.
        (get_subprogram_die): Pass it in.
        * method.c (implicitly_declare_fn): Don't set DECL_ARTIFICIAL on
        second parm of op=.

From-SVN: r39945

14 files changed, 151 insertions, 73 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f0ffdcc..57d50323 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,25 @@
+2001-02-21  Jason Merrill  <jason@redhat.com>
+
+	* tree.h (DECL_UNINLINABLE): Move from C++ frontend.
+	(struct tree_decl): Add uninlinable bitfield.
+	* c-decl.c (duplicate_decls): Set it.
+	* integrate.c (function_cannot_inline_p): Check it.
+
+	* dwarf2out.c (add_name_and_src_coords_attributes): Don't add 
+	DW_AT_MIPS_linkage_name to abstract methods.
+	(dwarf2out_abstract_function): Emit class context before calling
+	set_decl_abstract_flags.  Don't clear DECL_ABSTRACT.
+	(gen_subprogram_die): Remove obsolete code.
+	(gen_member_die): Don't include clones in the member list.
+	(gen_decl_die): Emit abstract info for clone origin.
+	* dwarfout.c (output_type): Don't include clones in the member list.
+	* dbxout.c (dbxout_type_methods): Ignore abstract methods.
+	* toplev.c (note_deferral_of_defined_inline_function): Don't clear
+	DECL_ABSTRACT on a function that already has it set.
+
+	* dwarf2out.c (gen_formal_types_die): Also accept a FUNCTION_DECL.
+	(get_subprogram_die): Pass it in.
+
 2001-02-21  Richard Earnshaw  <rearnsha@arm.com>
 
 	* flow.c (mark_set_1): Make not_dead unsigned long.  For
diff --git a/gcc/c-decl.c b/gcc/c-decl.c
index a2118fd..0f104a4 100644
--- a/gcc/c-decl.c
+++ b/gcc/c-decl.c
@@ -1928,19 +1928,6 @@ duplicate_decls (newdecl, olddecl, different_binding_level)
   /* For functions, static overrides non-static.  */
   if (TREE_CODE (newdecl) == FUNCTION_DECL)
     {
-      /* If we're redefining a function previously defined as extern
-	 inline, make sure we emit debug info for the inline before we
-	 throw it away, in case it was inlined into a function that hasn't
-	 been written out yet.  */
-      if (new_is_definition && DECL_INITIAL (olddecl) && TREE_USED (olddecl))
-	{
-	  note_outlining_of_inline_function (olddecl);
-
-	  /* The new defn must not be inline.
-	     FIXME what about -finline-functions? */
-	  DECL_INLINE (newdecl) = 0;
-	}
-
       TREE_PUBLIC (newdecl) &= TREE_PUBLIC (olddecl);
       /* This is since we don't automatically
 	 copy the attributes of NEWDECL into OLDDECL.  */
@@ -1974,12 +1961,27 @@ duplicate_decls (newdecl, olddecl, different_binding_level)
 
   if (TREE_CODE (newdecl) == FUNCTION_DECL)
     {
-      /* If either decl says `inline', this fn is inline,
-	 unless its definition was passed already.  */
-      if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == 0)
-	DECL_INLINE (olddecl) = 1;
+      /* If we're redefining a function previously defined as extern
+	 inline, make sure we emit debug info for the inline before we
+	 throw it away, in case it was inlined into a function that hasn't
+	 been written out yet.  */
+      if (new_is_definition && DECL_INITIAL (olddecl) && TREE_USED (olddecl))
+	{
+	  note_outlining_of_inline_function (olddecl);
 
-      DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
+	  /* The new defn must not be inline.  */
+	  DECL_INLINE (newdecl) = 0;
+	  DECL_UNINLINABLE (newdecl) = 1;
+	}
+      else
+	{
+	  /* If either decl says `inline', this fn is inline,
+	     unless its definition was passed already.  */
+	  if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == 0)
+	    DECL_INLINE (olddecl) = 1;
+
+	  DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
+	}
 
       if (DECL_BUILT_IN (olddecl))
 	{
diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 5387d68..9c0ad71 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,17 @@
+2001-02-21  Jason Merrill  <jason@redhat.com>
+
+	* cp-tree.h (struct lang_decl_flags): Remove uninlinable flag.
+	(DECL_UNINLINABLE): Move to middle-end.
+
+	* class.c (clone_function_decl): Set DECL_ABSTRACT on original fn.
+	* decl.c (duplicate_decls): Preserve DECL_ABSTRACT.
+	* class.c (build_clone): Set DECL_ABSTRACT_ORIGIN for the clone.
+	* optimize.c (maybe_clone_body): Set DECL_ABSTRACT_ORIGIN for the
+	parms and outer BLOCK.  note_deferral_of_defined_inline_function.
+
+	* method.c (implicitly_declare_fn): Don't set DECL_ARTIFICIAL on
+	second parm of op=.
+
 2001-02-19  Mark Mitchell  <mark@codesourcery.com>
 
 	* decl2.c (set_decl_namespace): Allow explicit instantiations in
diff --git a/gcc/cp/class.c b/gcc/cp/class.c
index 6752c90..2ba9e03 100644
--- a/gcc/cp/class.c
+++ b/gcc/cp/class.c
@@ -4179,6 +4179,7 @@ build_clone (fn, name)
   clone = copy_decl (fn);
   /* Remember where this function came from.  */
   DECL_CLONED_FUNCTION (clone) = fn;
+  DECL_ABSTRACT_ORIGIN (clone) = fn;
   /* Reset the function name.  */
   DECL_NAME (clone) = name;
   DECL_ASSEMBLER_NAME (clone) = DECL_NAME (clone);
@@ -4339,6 +4340,9 @@ clone_function_decl (fn, update_method_vec_p)
       if (update_method_vec_p)
 	add_method (DECL_CONTEXT (clone), clone, /*error_p=*/0);
     }
+
+  /* Note that this is an abstract function that is never emitted.  */
+  DECL_ABSTRACT (fn) = 1;
 }
 
 /* For each of the constructors and destructors in T, create an
diff --git a/gcc/cp/cp-tree.h b/gcc/cp/cp-tree.h
index f1e6df5..240832a 100644
--- a/gcc/cp/cp-tree.h
+++ b/gcc/cp/cp-tree.h
@@ -1811,7 +1811,7 @@ struct lang_decl_flags
   unsigned static_function : 1;
   unsigned pure_virtual : 1;
   unsigned has_in_charge_parm_p : 1;
-  unsigned uninlinable : 1;
+  unsigned has_vtt_parm_p : 1;
 
   unsigned deferred : 1;
   unsigned use_template : 2;
@@ -1828,7 +1828,7 @@ struct lang_decl_flags
   unsigned assignment_operator_p : 1;
   unsigned anticipated_p : 1;
   unsigned generate_with_vtable_p : 1;
-  unsigned has_vtt_parm_p : 1;
+  /* One unused bit.  */
 
   union {
     /* In a FUNCTION_DECL, VAR_DECL, TYPE_DECL, or TEMPLATE_DECL, this
@@ -2469,10 +2469,6 @@ extern int flag_new_for_scope;
 /* Record whether a typedef for type `int' was actually `signed int'.  */
 #define C_TYPEDEF_EXPLICITLY_SIGNED(exp) DECL_LANG_FLAG_1 ((exp))
 
-/* In a FUNCTION_DECL, nonzero if the function cannot be inlined.  */
-#define DECL_UNINLINABLE(NODE) \
-  (DECL_LANG_SPECIFIC (NODE)->decl_flags.uninlinable)
-
 /* Returns non-zero if DECL has external linkage, as specified by the
    language standard.  (This predicate may hold even when the
    corresponding entity is not actually given external linkage in the
diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c
index af5ac8a..85e9fa6 100644
--- a/gcc/cp/decl.c
+++ b/gcc/cp/decl.c
@@ -3626,6 +3626,9 @@ duplicate_decls (newdecl, olddecl)
 	DECL_INLINE (olddecl) = 1;
       DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
 
+      /* Preserve abstractness on cloned [cd]tors.  */
+      DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
+
       if (! types_match)
 	{
 	  DECL_LANGUAGE (olddecl) = DECL_LANGUAGE (newdecl);
diff --git a/gcc/cp/method.c b/gcc/cp/method.c
index 349afcb..75e713d 100644
--- a/gcc/cp/method.c
+++ b/gcc/cp/method.c
@@ -1026,8 +1026,6 @@ implicitly_declare_fn (kind, type, const_p)
 
   my_friendly_assert (TREE_CODE (fn) == FUNCTION_DECL, 20000408);
 
-  if (kind != sfk_constructor && kind != sfk_destructor)
-    DECL_ARTIFICIAL (TREE_CHAIN (DECL_ARGUMENTS (fn))) = 1;
   DECL_ARTIFICIAL (fn) = 1;
   DECL_NOT_REALLY_EXTERN (fn) = 1;
   DECL_THIS_INLINE (fn) = 1;
diff --git a/gcc/cp/optimize.c b/gcc/cp/optimize.c
index 115b467..21c94ea 100644
--- a/gcc/cp/optimize.c
+++ b/gcc/cp/optimize.c
@@ -932,6 +932,9 @@ maybe_clone_body (fn)
       && !DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (fn))
     return 0;
 
+  /* Emit the DWARF1 abstract instance.  */
+  note_deferral_of_defined_inline_function (fn);
+
   /* We know that any clones immediately follow FN in the TYPE_METHODS
      list.  */
   for (clone = TREE_CHAIN (fn);
@@ -996,6 +999,7 @@ maybe_clone_body (fn)
 		 from the CLONE to this parameter.  */
 	      if (DECL_HAS_VTT_PARM_P (clone))
 		{
+		  DECL_ABSTRACT_ORIGIN (clone_parm) = parm;
 		  splay_tree_insert (id.decl_map,
 				     (splay_tree_key) parm,
 				     (splay_tree_value) clone_parm);
@@ -1013,6 +1017,7 @@ maybe_clone_body (fn)
 	     function.  */
 	  else
 	    {
+	      DECL_ABSTRACT_ORIGIN (clone_parm) = parm;
 	      splay_tree_insert (id.decl_map,
 				 (splay_tree_key) parm,
 				 (splay_tree_value) clone_parm);
@@ -1029,7 +1034,9 @@ maybe_clone_body (fn)
 
       /* Now, expand this function into RTL, if appropriate.  */
       function_name_declared_p = 1;
-      expand_body (finish_function (0));
+      finish_function (0);
+      BLOCK_ABSTRACT_ORIGIN (DECL_INITIAL (clone)) = DECL_INITIAL (fn);
+      expand_body (clone);
       pop_from_top_level ();
     }
   
diff --git a/gcc/dbxout.c b/gcc/dbxout.c
index 4c4a61a..05a95a4 100644
--- a/gcc/dbxout.c
+++ b/gcc/dbxout.c
@@ -841,7 +841,9 @@ dbxout_type_methods (type)
 
 	  last = fndecl;
 
-	  if (DECL_IGNORED_P (fndecl))
+	  /* Also ignore abstract methods; those are only interesting to
+	     the DWARF backends.  */
+	  if (DECL_IGNORED_P (fndecl) || DECL_ABSTRACT (fndecl))
 	    continue;
 
 	  if (flag_minimal_debug)
diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
index ed4970c..ce3efaf 100644
--- a/gcc/dwarf2out.c
+++ b/gcc/dwarf2out.c
@@ -9390,7 +9390,8 @@ add_name_and_src_coords_attributes (die, decl)
 
       if ((TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL)
 	  && TREE_PUBLIC (decl)
-	  && DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
+	  && DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl)
+	  && !DECL_ABSTRACT (decl))
 	add_AT_string (die, DW_AT_MIPS_linkage_name,
 		       IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
     }
@@ -9936,24 +9937,22 @@ gen_formal_types_die (function_or_method_type, context_die)
 {
   register tree link;
   register tree formal_type = NULL;
-  register tree first_parm_type = TYPE_ARG_TYPES (function_or_method_type);
+  register tree first_parm_type;
+  tree arg;
 
-#if 0
-  /* In the case where we are generating a formal types list for a C++
-     non-static member function type, skip over the first thing on the
-     TYPE_ARG_TYPES list because it only represents the type of the hidden
-     `this pointer'.  The debugger should be able to figure out (without
-     being explicitly told) that this non-static member function type takes a
-     `this pointer' and should be able to figure what the type of that hidden
-     parameter is from the DW_AT_member attribute of the parent
-     DW_TAG_subroutine_type DIE.  */
-  if (TREE_CODE (function_or_method_type) == METHOD_TYPE)
-    first_parm_type = TREE_CHAIN (first_parm_type);
-#endif
+  if (TREE_CODE (function_or_method_type) == FUNCTION_DECL)
+    {
+      arg = DECL_ARGUMENTS (function_or_method_type);
+      function_or_method_type = TREE_TYPE (function_or_method_type);
+    }
+  else
+    arg = NULL_TREE;
+  
+  first_parm_type = TYPE_ARG_TYPES (function_or_method_type);
 
   /* Make our first pass over the list of formal parameter types and output a
      DW_TAG_formal_parameter DIE for each one.  */
-  for (link = first_parm_type; link; link = TREE_CHAIN (link))
+  for (link = first_parm_type; link; )
     {
       register dw_die_ref parm_die;
 
@@ -9963,9 +9962,14 @@ gen_formal_types_die (function_or_method_type, context_die)
 
       /* Output a (nameless) DIE to represent the formal parameter itself.  */
       parm_die = gen_formal_parameter_die (formal_type, context_die);
-      if (TREE_CODE (function_or_method_type) == METHOD_TYPE
-	  && link == first_parm_type)
+      if ((TREE_CODE (function_or_method_type) == METHOD_TYPE
+	   && link == first_parm_type)
+	  || (arg && DECL_ARTIFICIAL (arg)))
 	add_AT_flag (parm_die, DW_AT_artificial, 1);
+
+      link = TREE_CHAIN (link);
+      if (arg)
+	arg = TREE_CHAIN (arg);
     }
 
   /* If this function type has an ellipsis, add a
@@ -10025,19 +10029,34 @@ void
 dwarf2out_abstract_function (decl)
      tree decl;
 {
-  register dw_die_ref old_die = lookup_decl_die (decl);
+  register dw_die_ref old_die;
   tree save_fn;
+  tree context;
+  int was_abstract = DECL_ABSTRACT (decl);
+
+  /* Make sure we have the actual abstract inline, not a clone.  */
+  decl = DECL_ORIGIN (decl);
 
+  old_die = lookup_decl_die (decl);  
   if (old_die && get_AT_unsigned (old_die, DW_AT_inline))
     /* We've already generated the abstract instance.  */
     return;
 
+  /* Be sure we've emitted the in-class declaration DIE (if any) first, so
+     we don't get confused by DECL_ABSTRACT.  */
+  context = decl_class_context (decl);
+  if (context)
+    gen_type_die_for_member
+      (context, decl, decl_function_context (decl) ? NULL : comp_unit_die);
+ 
+  /* Pretend we've just finished compiling this function.  */
   save_fn = current_function_decl;
   current_function_decl = decl;
 
   set_decl_abstract_flags (decl, 1);
   dwarf2out_decl (decl);
-  set_decl_abstract_flags (decl, 0);
+  if (! was_abstract)
+    set_decl_abstract_flags (decl, 0);
 
   current_function_decl = save_fn;
 }
@@ -10088,17 +10107,6 @@ gen_subprogram_die (decl, context_die)
       subr_die = new_die (DW_TAG_subprogram, context_die);
       add_abstract_origin_attribute (subr_die, origin);
     }
-  else if (old_die && DECL_ABSTRACT (decl)
-	   && get_AT_unsigned (old_die, DW_AT_inline))
-    {
-      /* This must be a redefinition of an extern inline function.
-	 We can just reuse the old die here.  */
-      subr_die = old_die;
-
-      /* Clear out the inlined attribute and parm types.  */
-      remove_AT (subr_die, DW_AT_inline);
-      remove_children (subr_die);
-    }
   else if (old_die)
     {
       register unsigned file_index
@@ -10261,7 +10269,7 @@ gen_subprogram_die (decl, context_die)
   if (debug_info_level <= DINFO_LEVEL_TERSE)
     ;
   else if (declaration)
-    gen_formal_types_die (TREE_TYPE (decl), subr_die);
+    gen_formal_types_die (decl, subr_die);
   else
     {
       /* Generate DIEs to represent all known formal parameters */
@@ -10738,6 +10746,10 @@ gen_member_die (type, context_die)
   /* Now output info about the function members (if any).  */
   for (member = TYPE_METHODS (type); member; member = TREE_CHAIN (member))
     {
+      /* Don't include clones in the member list.  */
+      if (DECL_ABSTRACT_ORIGIN (member))
+	continue;
+
       child = lookup_decl_die (member);
       if (child)
 	splice_child_die (context_die, child);
@@ -11266,20 +11278,23 @@ gen_decl_die (decl, context_die)
 	  && (current_function_decl == NULL_TREE || DECL_ARTIFICIAL (decl)))
 	break;
 
+      /* If we're emitting a clone, emit info for the abstract instance.  */
+      if (DECL_ORIGIN (decl) != decl)
+	dwarf2out_abstract_function (DECL_ABSTRACT_ORIGIN (decl));
       /* If we're emitting an out-of-line copy of an inline function,
 	 emit info for the abstract instance and set up to refer to it.  */
-      if (DECL_INLINE (decl) && ! DECL_ABSTRACT (decl)
-	  && ! class_scope_p (context_die)
-	  /* dwarf2out_abstract_function won't emit a die if this is just a
-	     declaration.  We must avoid setting DECL_ABSTRACT_ORIGIN in
-	     that case, because that works only if we have a die.  */
-	  && DECL_INITIAL (decl) != NULL_TREE)
+      else if (DECL_INLINE (decl) && ! DECL_ABSTRACT (decl)
+	       && ! class_scope_p (context_die)
+	       /* dwarf2out_abstract_function won't emit a die if this is just
+		  a declaration.  We must avoid setting DECL_ABSTRACT_ORIGIN in
+		  that case, because that works only if we have a die.  */
+	       && DECL_INITIAL (decl) != NULL_TREE)
 	{
 	  dwarf2out_abstract_function (decl);
 	  set_decl_origin_self (decl);
 	}
-
-      if (debug_info_level > DINFO_LEVEL_TERSE)
+      /* Otherwise we're emitting the primary DIE for this decl.  */
+      else if (debug_info_level > DINFO_LEVEL_TERSE)
 	{
 	  /* Before we describe the FUNCTION_DECL itself, make sure that we
 	     have described its return type.  */
diff --git a/gcc/dwarfout.c b/gcc/dwarfout.c
index 9c7cb47..370d14f 100644
--- a/gcc/dwarfout.c
+++ b/gcc/dwarfout.c
@@ -4444,7 +4444,13 @@ output_type (type, containing_scope)
 	      for (func_member = TYPE_METHODS (type);
 		   func_member;
 		   func_member = TREE_CHAIN (func_member))
-		output_decl (func_member, type);
+		{
+		  /* Don't include clones in the member list.  */
+		  if (DECL_ABSTRACT_ORIGIN (func_member))
+		    continue;
+
+		  output_decl (func_member, type);
+		}
 	    }
 
 	    --in_class;
diff --git a/gcc/integrate.c b/gcc/integrate.c
index bcb3619..270a9c5 100644
--- a/gcc/integrate.c
+++ b/gcc/integrate.c
@@ -139,6 +139,9 @@ function_cannot_inline_p (fndecl)
   register tree parms;
   rtx result;
 
+  if (DECL_UNINLINABLE (fndecl))
+    return N_("function cannot be inline");
+
   /* No inlines with varargs.  */
   if ((last && TREE_VALUE (last) != void_type_node)
       || current_function_varargs)
diff --git a/gcc/toplev.c b/gcc/toplev.c
index b76b6ba..0e592bc 100644
--- a/gcc/toplev.c
+++ b/gcc/toplev.c
@@ -2661,19 +2661,23 @@ note_deferral_of_defined_inline_function (decl)
   /* Generate the DWARF info for the "abstract" instance of a function
      which we may later generate inlined and/or out-of-line instances
      of.  */
-  if (write_symbols == DWARF_DEBUG && DECL_INLINE (decl))
+  if (write_symbols == DWARF_DEBUG
+      && (DECL_INLINE (decl) || DECL_ABSTRACT (decl))
+      && ! DECL_ABSTRACT_ORIGIN (decl))
     {
       /* The front-end may not have set CURRENT_FUNCTION_DECL, but the
 	 DWARF code expects it to be set in this case.  Intuitively,
 	 DECL is the function we just finished defining, so setting
 	 CURRENT_FUNCTION_DECL is sensible.  */
       tree saved_cfd = current_function_decl;
+      int was_abstract = DECL_ABSTRACT (decl);
       current_function_decl = decl;
 
       /* Let the DWARF code do its work.  */
       set_decl_abstract_flags (decl, 1);
       dwarfout_file_scope_decl (decl, 0);
-      set_decl_abstract_flags (decl, 0);
+      if (! was_abstract)
+	set_decl_abstract_flags (decl, 0);
 
       /* Reset CURRENT_FUNCTION_DECL.  */
       current_function_decl = saved_cfd;
diff --git a/gcc/tree.h b/gcc/tree.h
index 60427b9..3d2e384 100644
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -239,8 +239,6 @@ struct tree_common
            INTEGER_TYPE, ENUMERAL_TYPE, FIELD_DECL
        DECL_BUILT_IN_NONANSI in
            FUNCTION_DECL
-       TREE_PARMLIST in
-           TREE_PARMLIST (C++)
        SAVE_EXPR_NOPLACEHOLDER in
 	   SAVE_EXPR
 
@@ -1461,6 +1459,9 @@ struct tree_type
    where it is called.  */
 #define DECL_INLINE(NODE) (FUNCTION_DECL_CHECK (NODE)->decl.inline_flag)
 
+/* In a FUNCTION_DECL, nonzero if the function cannot be inlined.  */
+#define DECL_UNINLINABLE(NODE) (FUNCTION_DECL_CHECK (NODE)->decl.uninlinable)
+
 /* Nonzero in a FUNCTION_DECL means this is a built-in function
    that is not specified by ansi C and that users are supposed to be allowed
    to redefine for any purpose whatever.  */
@@ -1632,7 +1633,8 @@ struct tree_decl
   unsigned pointer_depth : 2;
   unsigned non_addressable : 1;
   unsigned user_align : 1;
-  /* Three unused bits.  */
+  unsigned uninlinable : 1;
+  /* Two unused bits.  */
 
   unsigned lang_flag_0 : 1;
   unsigned lang_flag_1 : 1;