Rewrite attribute parsing; update the expected conflicts and state

numbers.

From-SVN: r7252

gcc/c-parse.in

@@ -27,22 +27,23 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 written by AT&T, but I have never seen it.  */
 
 ifobjc
-%expect 20
+%expect 22
 end ifobjc
 ifc
-%expect 8
+%expect 10
 
-/* These are the 8 conflicts you should get in parse.output;
+/* These are the 10 conflicts you should get in parse.output;
    the state numbers may vary if minor changes in the grammar are made.
 
 State 41 contains 1 shift/reduce conflict.  (Two ways to recover from error.)
-State 92 contains 1 shift/reduce conflict.  (Two ways to recover from error.)
-State 99 contains 1 shift/reduce conflict.  (Two ways to recover from error.)
-State 103 contains 1 shift/reduce conflict.  (Two ways to recover from error.)
-State 119 contains 1 shift/reduce conflict.  (See comment at component_decl.)
-State 183 contains 1 shift/reduce conflict.  (Two ways to recover from error.)
-State 193 contains 1 shift/reduce conflict.  (Two ways to recover from error.)
-State 199 contains 1 shift/reduce conflict.  (Two ways to recover from error.)
+State 97 contains 1 shift/reduce conflict.  (Two ways to recover from error.)
+State 104 contains 1 shift/reduce conflict.  (Two ways to recover from error.)
+State 108 contains 1 shift/reduce conflict.  (Two ways to recover from error.)
+State 124 contains 1 shift/reduce conflict.  (See comment at component_decl.)
+State 191 contains 1 shift/reduce conflict.  (Two ways to recover from error.)
+State 204 contains 1 shift/reduce conflict.  (Two ways to recover from error.)
+State 210 contains 1 shift/reduce conflict.  (Two ways to recover from error.)
+State 449 contains 2 shift/reduce conflicts.  (Four ways to parse this.)
 */
 end ifc
 
@@ -178,7 +179,8 @@ void yyerror ();
 %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
 %type <ttype> init maybeasm
 %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
-%type <ttype> maybe_attribute attribute_list attrib
+%type <ttype> maybe_attribute attributes attribute attribute_list attrib
+%type <ttype> any_word
 
 %type <ttype> compstmt
 
@@ -1048,63 +1050,55 @@ notype_initdcl:
 /* the * rules are dummies to accept the Apollo extended syntax
    so that the header files compile. */
 maybe_attribute:
+      /* empty */
+  		{ $$ = NULL_TREE; }
+	| attributes
+		{ $$ = $1; }
+	;
+ 
+attributes:
+      attribute
+		{ $$ = $1; }
+	| attributes attribute
+		{ $$ = chainon ($1, $2); }
+	;
+
+attribute:
+      ATTRIBUTE '(' '(' attribute_list ')' ')'
+		{ $$ = $4; }
+	;
+
+attribute_list:
+      attrib
+		{ $$ = build_tree_list (NULL_TREE, $1); }
+	| attribute_list ',' attrib
+		{ $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
+	;
+ 
+attrib:
     /* empty */
 		{ $$ = NULL_TREE; }
-    | maybe_attribute ATTRIBUTE '(' '(' attribute_list ')' ')'
-		{ $$ = chainon ($5, $1); }
-    ;
-
-attribute_list
-    : attrib
-	{ $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
-    | attribute_list ',' attrib
-	{ $$ = tree_cons (NULL_TREE, $3, $1); }
-    ;
-
-attrib
-    : identifier
-	{ if (strcmp (IDENTIFIER_POINTER ($1), "packed")
-	      && strcmp (IDENTIFIER_POINTER ($1), "noreturn"))
-	    warning ("`%s' attribute directive ignored",
-		     IDENTIFIER_POINTER ($1));
-	  $$ = $1; }
-    | TYPE_QUAL
-    | identifier '(' expr_no_commas ')'
-	{ /* If not aligned(n) or section(name), then issue warning */
-	  if (strcmp (IDENTIFIER_POINTER ($1), "section") == 0
-	      || strcmp (IDENTIFIER_POINTER ($1), "mode") == 0)
-	    {
-	      if (TREE_CODE ($3) != STRING_CST)
-		{
-		  error ("invalid argument in `%s' attribute",
-			 IDENTIFIER_POINTER ($1));
-		  $$ = $1;
-		}
-	      $$ = tree_cons ($1, $3, NULL_TREE);
-	    }
-	  else if (strcmp (IDENTIFIER_POINTER ($1), "aligned") != 0)
-	    {
-	      warning ("`%s' attribute directive ignored",
-		       IDENTIFIER_POINTER ($1));
-	      $$ = $1;
-	    }
-	  else
-	    $$ = tree_cons ($1, $3, NULL_TREE); }
-    | identifier '(' IDENTIFIER ',' expr_no_commas ',' expr_no_commas ')'
-	{ /* if not "format(...)", then issue warning */
-	  if (strcmp (IDENTIFIER_POINTER ($1), "format") != 0)
-	    {
-	      warning ("`%s' attribute directive ignored",
-		       IDENTIFIER_POINTER ($1));
-	      $$ = $1;
-	    }
-	  else
-	    $$ = tree_cons ($1,
-			    tree_cons ($3,
-				       tree_cons ($5, $7, NULL_TREE),
-				       NULL_TREE),
-			    NULL_TREE); }
-    ;
+	| any_word
+		{ $$ = $1; }
+	| any_word '(' IDENTIFIER ')'
+		{ $$ = tree_cons ($1, NULL_TREE,
+				  build_tree_list (NULL_TREE, $3)); }
+	| any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
+		{ $$ = tree_cons ($1, NULL_TREE,
+				  tree_cons (NULL_TREE, $3, $5)); }
+	| any_word '(' nonnull_exprlist ')'
+		{ $$ = tree_cons ($1, NULL_TREE, $3); }
+	;
+
+/* This still leaves out most reserved keywords,
+   shouldn't we include them?  */
+
+any_word:
+	  identifier
+	| SCSPEC
+	| TYPESPEC
+	| TYPE_QUAL
+	;
 
 /* Initializers.  `init' is the entry point.  */