c-typeck.c (c_expand_start_case): Return immediately if exp is an ERROR_MARK.

1999-08-27 00:27 -0700  Zack Weinberg  <zack@bitmover.com>

	* c-typeck.c (c_expand_start_case): Return immediately if exp
	is an ERROR_MARK.
	* fold-const.c (operand_equal_p): Return immediately if arg1
	or arg0 are ERROR_MARKs.
	* stor-layout.c (layout_type [case RECORD_TYPE]): Ignore
	fields of type ERROR_MARK when calculating if the record can
	go in a register.

From-SVN: r28923

gcc/ChangeLog

+1999-08-27 00:27 -0700  Zack Weinberg  <zack@bitmover.com>
+
+	* c-typeck.c (c_expand_start_case): Return immediately if exp
+	is an ERROR_MARK.
+	* fold-const.c (operand_equal_p): Return immediately if arg1
+	or arg0 are ERROR_MARKs.
+	* stor-layout.c (layout_type [case RECORD_TYPE]): Ignore
+	fields of type ERROR_MARK when calculating if the record can
+	go in a register.
+
 Fri Aug 27 01:03:48 1999  Jim Kingdon  <http://developer.redhat.com>
 	with much help from Jeffrey A Law and Richard Henderson
 

gcc/c-typeck.c

@@ -6706,8 +6706,14 @@ tree
 c_expand_start_case (exp)
      tree exp;
 {
-  register enum tree_code code = TREE_CODE (TREE_TYPE (exp));
-  tree type = TREE_TYPE (exp);
+  register enum tree_code code;
+  tree type;
+
+  if (TREE_CODE (exp) == ERROR_MARK)
+    return exp;
+
+  code = TREE_CODE (TREE_TYPE (exp));
+  type = TREE_TYPE (exp);
 
   if (code != INTEGER_TYPE && code != ENUMERAL_TYPE && code != ERROR_MARK)
     {

gcc/fold-const.c

@@ -2091,6 +2091,8 @@ operand_equal_p (arg0, arg1, only_const)
   if (TREE_CODE (arg0) != TREE_CODE (arg1)
       /* This is needed for conversions and for COMPONENT_REF.
 	 Might as well play it safe and always test this.  */
+      || TREE_CODE (TREE_TYPE (arg0)) == ERROR_MARK
+      || TREE_CODE (TREE_TYPE (arg1)) == ERROR_MARK
       || TYPE_MODE (TREE_TYPE (arg0)) != TYPE_MODE (TREE_TYPE (arg1)))
     return 0;
 

gcc/stor-layout.c

@@ -936,7 +936,8 @@ layout_type (type)
 	    {
 	      int bitpos;
 
-	      if (TREE_CODE (field) != FIELD_DECL)
+	      if (TREE_CODE (field) != FIELD_DECL
+		  || TREE_CODE (TREE_TYPE (field)) == ERROR_MARK)
 		continue;
 
 	      if (TYPE_MODE (TREE_TYPE (field)) == BLKmode