cp-tree.h (UPT_TEMPLATE): Remove.

* cp-tree.h (UPT_TEMPLATE): Remove.
	(UPT_PARMS): Likewise.
	(DECL_NEEDED_P): New macro.
	* decl2.c (finish_vtable_vardecl): Use it.
	(finish_objects): Don't crash with -fsyntax-only.
	(finish_file): Use DECL_NEEDED_P.  Don't prune vtables when
	-fsyntax-only.
	* pt.c (tsubst_friend_function): Remove FIXME that talks about
	obstacks.
	(tsubst_expr): Correct handling of function try-blocks.
	* semantics.c: Include flags.h.
	(expand_body): Don't do RTL generation if -fsyntax-only.
	* Makefile.in (semantics.o): Depends on flags.h.

From-SVN: r29705

gcc/cp/ChangeLog

@@ -1,3 +1,19 @@
+1999-09-29  Mark Mitchell  <mark@codesourcery.com>
+
+	* cp-tree.h (UPT_TEMPLATE): Remove.
+	(UPT_PARMS): Likewise.
+	(DECL_NEEDED_P): New macro.
+	* decl2.c (finish_vtable_vardecl): Use it.
+	(finish_objects): Don't crash with -fsyntax-only.
+	(finish_file): Use DECL_NEEDED_P.  Don't prune vtables when
+	-fsyntax-only.
+	* pt.c (tsubst_friend_function): Remove FIXME that talks about
+	obstacks.
+	(tsubst_expr): Correct handling of function try-blocks.
+	* semantics.c: Include flags.h.
+	(expand_body): Don't do RTL generation if -fsyntax-only.
+	* Makefile.in (semantics.o): Depends on flags.h.
+	
 1999-09-28  Gabriel Dos Reis  <gdr@codesourcery.com>
 
         * pt.c (most_general_template): Adjust declaration.

gcc/cp/Makefile.in

@@ -294,7 +294,8 @@ errfn.o : errfn.c $(CONFIG_H) $(CXX_TREE_H) $(srcdir)/../system.h \
 repo.o : repo.c $(CONFIG_H) $(CXX_TREE_H) $(srcdir)/../system.h \
   $(srcdir)/../toplev.h $(srcdir)/../ggc.h
 semantics.o: semantics.c $(CONFIG_H) $(CXX_TREE_H) lex.h \
-  $(srcdir)/../except.h $(srcdir)/../system.h $(srcdir)/../toplev.h
+  $(srcdir)/../except.h $(srcdir)/../system.h $(srcdir)/../toplev.h \
+  $(srcdir)/../flags.h
 dump.o: dump.c $(CONFIG_H) $(CXX_TREE_H) $(srcdir)/../system.h
 
 #

gcc/cp/cp-tree.h

@@ -2494,9 +2494,13 @@ extern int flag_new_for_scope;
 
 #define THUNK_DELTA(DECL) ((DECL)->decl.frame_size.i)
 
-/* ...and for unexpanded-parameterized-type nodes.  */
-#define UPT_TEMPLATE(NODE)      TREE_PURPOSE(TYPE_VALUES(NODE))
-#define UPT_PARMS(NODE)         TREE_VALUE(TYPE_VALUES(NODE))
+/* DECL_NEEDED_P holds of a declaration when we need to emit its
+   definition.  This is true when the back-end tells us that
+   the symbol has been referenced in the generated code.  If, however,
+   we are not generating code, then it is also true when a symbol has
+   just been used somewhere, even if it's not really needed.  */
+#define DECL_NEEDED_P(DECL)				  \
+  (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME ((DECL)))) \
 
 /* An un-parsed default argument looks like an identifier.  */
 #define DEFARG_LENGTH(NODE)  (DEFAULT_ARG_CHECK(NODE)->identifier.length)

gcc/cp/decl2.c

@@ -2556,7 +2556,7 @@ finish_vtable_vardecl (t, data)
 
   if (! DECL_EXTERNAL (vars)
       && (DECL_INTERFACE_KNOWN (vars) 
-	  || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (vars))
+	  || DECL_NEEDED_P (vars)
 	  || (hack_decl_function_context (vars) && TREE_USED (vars)))
       && ! TREE_ASM_WRITTEN (vars))
     {
@@ -2600,9 +2600,14 @@ finish_vtable_vardecl (t, data)
       if (flag_vtable_gc)
 	output_vtable_inherit (vars);
 
+      /* Because we're only doing syntax-checking, we'll never end up
+	 actually marking the variable as written.  */
+      if (flag_syntax_only)
+	TREE_ASM_WRITTEN (vars) = 1;
+
       return 1;
     }
-  else if (! TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (vars)))
+  else if (!DECL_NEEDED_P (vars))
     /* We don't know what to do with this one yet.  */
     return 0;
 
@@ -2827,6 +2832,12 @@ finish_objects (method_type, initp, body)
   fn = finish_function (lineno, 0);
   expand_body (fn);
 
+  /* When only doing semantic analysis, and no RTL generation, we
+     can't call functions that directly emit assembly code; there is
+     no assembly file in which to put the code.  */
+  if (flag_syntax_only)
+    return;
+
   fnname = XSTR (XEXP (DECL_RTL (fn), 0), 0);
   if (initp == DEFAULT_INIT_PRIORITY)
     {
@@ -2835,7 +2846,6 @@ finish_objects (method_type, initp, body)
       else
 	assemble_destructor (fnname);
     }
-
 #if defined (ASM_OUTPUT_SECTION_NAME) && defined (ASM_OUTPUT_CONSTRUCTOR)
   /* If we're using init priority we can't use assemble_*tor, but on ELF
      targets we can stick the references into named sections for GNU ld
@@ -3554,8 +3564,7 @@ finish_file ()
       
 	  if (DECL_NOT_REALLY_EXTERN (decl)
 	      && DECL_INITIAL (decl)
-	      && (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))
-		  || !DECL_COMDAT (decl)))
+	      && (DECL_NEEDED_P (decl) || !DECL_COMDAT (decl)))
 	    DECL_EXTERNAL (decl) = 0;
 	}
 
@@ -3603,8 +3612,10 @@ finish_file ()
 
   /* Now delete from the chain of variables all virtual function tables.
      We output them all ourselves, because each will be treated
-     specially.  */
-  walk_globals (vtable_decl_p, prune_vtable_vardecl, /*data=*/0);
+     specially.  We don't do this if we're just doing semantic
+     analysis, and not code-generation.  */
+  if (!flag_syntax_only)
+    walk_globals (vtable_decl_p, prune_vtable_vardecl, /*data=*/0);
 
   /* Now, issue warnings about static, but not defined, functions,
      etc., and emit debugging information.  */

gcc/cp/pt.c

@@ -4549,8 +4549,6 @@ tsubst_friend_function (decl, args)
 				    tsubst (DECL_TI_ARGS (decl),
 					    args, /*complain=*/1, 
 					    NULL_TREE));
-      /* FIXME: The decl we create via the next tsubst could be
-	 created on a temporary obstack.  */
       new_friend = tsubst (decl, args, /*complain=*/1, NULL_TREE);
       tmpl = determine_specialization (template_id, new_friend,
 				       &new_args, 
@@ -7466,7 +7464,10 @@ tsubst_expr (t, args, complain, in_decl)
 	  handler = TRY_HANDLERS (t);
 	  for (; handler; handler = TREE_CHAIN (handler))
 	    tsubst_expr (handler, args, complain, in_decl);
-	  finish_handler_sequence (stmt);
+	  if (FN_TRY_BLOCK_P (t))
+	    finish_function_handler_sequence (stmt);
+	  else
+	    finish_handler_sequence (stmt);
 	}
       break;
       

gcc/cp/semantics.c

@@ -31,6 +31,7 @@
 #include "except.h"
 #include "lex.h"
 #include "toplev.h"
+#include "flags.h"
 
 /* There routines provide a modular interface to perform many parsing
    operations.  They may therefore be used during actual parsing, or
@@ -2488,8 +2489,13 @@ expand_body (fn)
 	  && uses_template_parms (DECL_TI_ARGS (fn))))
     return;
 
+  /* There's no reason to do any of the work here if we're only doing
+     semantic analysis; this code just generates RTL.  */
+  if (flag_syntax_only)
+    return;
+
   /* Save the current file name and line number.  When we expand the
-     body of the funciton, we'll set LINENO and INPUT_FILENAME so that
+     body of the function, we'll set LINENO and INPUT_FILENAME so that
      error-mesages come out in the right places.  */
   saved_lineno = lineno;
   saved_input_filename = input_filename;