c-parse.in: Revert last change.

        * c-parse.in: Revert last change.
        (init_reswords): Do not enter disabled keywords into the ridpointers
        table, modulo objc weirdness.
        (_yylex): Return the canonical spelling for a keyword.

From-SVN: r36303

gcc/ChangeLog

+2000-09-10  Richard Henderson  <rth@cygnus.com>
+
+	* c-parse.in: Revert last change.
+	(init_reswords): Do not enter disabled keywords into the ridpointers
+	table, modulo objc weirdness.
+	(_yylex): Return the canonical spelling for a keyword.
+
 2000-09-10  Philip Blundell  <philb@gnu.org>
 
 	* config/arm/arm.h (CPP_ISA_SPEC): Don't define `arm' or `thumb'.

gcc/c-parse.in

@@ -1901,14 +1901,14 @@ stmt:
 		{ stmt_count++;
 		  emit_line_note ($<filename>-1, $<lineno>0);
 		  c_expand_asm_operands ($4, $6, NULL_TREE, NULL_TREE,
-					 $2 && C_RID_CODE ($2) == RID_VOLATILE,
+					 $2 == ridpointers[(int)RID_VOLATILE],
 					 input_filename, lineno); }
 	/* This is the case with input operands as well.  */
 	| ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':' asm_operands ')' ';'
 		{ stmt_count++;
 		  emit_line_note ($<filename>-1, $<lineno>0);
 		  c_expand_asm_operands ($4, $6, $8, NULL_TREE,
-					 $2 && C_RID_CODE ($2) == RID_VOLATILE,
+					 $2 == ridpointers[(int)RID_VOLATILE],
 					 input_filename, lineno); }
 	/* This is the case with clobbered registers as well.  */
 	| ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
@@ -1916,7 +1916,7 @@ stmt:
 		{ stmt_count++;
 		  emit_line_note ($<filename>-1, $<lineno>0);
 		  c_expand_asm_operands ($4, $6, $8, $10,
-					 $2 && C_RID_CODE ($2) == RID_VOLATILE,
+					 $2 == ridpointers[(int)RID_VOLATILE],
 					 input_filename, lineno); }
 	| GOTO identifier ';'
 		{ tree decl;
@@ -3061,8 +3061,7 @@ init_reswords ()
 {
   unsigned int i;
   tree id;
-  int mask = (D_YES
-	      | (doing_objc_thang ? 0 : D_OBJC)
+  int mask = ((doing_objc_thang ? 0 : D_OBJC)
 	      | (flag_isoc99 ? 0 : D_C89)
 	      | (flag_traditional ? D_TRAD : 0)
 	      | (flag_no_asm ? (flag_isoc99 ? D_EXT : D_EXT|D_EXT89) : 0));
@@ -3073,10 +3072,19 @@ init_reswords ()
   ridpointers = (tree *) xcalloc ((int) RID_MAX, sizeof (tree));
   for (i = 0; i < N_reswords; i++)
     {
+      /* If a keyword is disabled, do not enter it into the table
+	 and so create a canonical spelling that isn't a keyword.  */
+      if (reswords[i].disable & mask)
+	continue;
+
       id = get_identifier (reswords[i].word);
       C_RID_CODE (id) = reswords[i].rid;
       ridpointers [(int) reswords[i].rid] = id;
-      if (! (reswords[i].disable & mask))
+
+      /* Objective C does tricky things with enabling and disabling 
+	 keywords.  So these we must not elide in the test above, but
+	 wait and not mark them reserved now.  */
+      if (! (reswords[i].disable & D_YES))
 	C_IS_RESERVED_WORD (id) = 1;
     }
 }
@@ -3219,7 +3227,12 @@ _yylex ()
 
     case CPP_NAME:
       if (C_IS_RESERVED_WORD (yylval.ttype))
-	return rid_to_yy[C_RID_CODE (yylval.ttype)];
+	{
+	  enum rid rid_code = C_RID_CODE (yylval.ttype);
+	  /* Return the canonical spelling for this keyword.  */
+	  yylval.ttype = ridpointers[(int) rid_code];
+	  return rid_to_yy[(int) rid_code];
+	}
 
       if (IDENTIFIER_POINTER (yylval.ttype)[0] == '@')
 	{