fold-const.c (make_range): Don't go looking at TREE_OPERANDs of nodes that are not expressions.

	* fold-const.c (make_range): Don't go looking at TREE_OPERANDs of
	nodes that are not expressions.

From-SVN: r20728

gcc/ChangeLog

+Thu Jun 25 12:47:41 1998  Mark Mitchell  <mark@markmitchell.com>
+
+	* fold-const.c (make_range): Don't go looking at TREE_OPERANDs of
+	nodes that are not expressions.
+
 Thu Jun 25 15:08:16 1998  Mark Mitchell  <mark@markmitchell.com>
 
 	* invoke.texi (-fstrict-aliasing): Document.

gcc/fold-const.c

@@ -2836,10 +2836,20 @@ make_range (exp, pin_p, plow, phigh)
   while (1)
     {
       code = TREE_CODE (exp);
-      arg0 = TREE_OPERAND (exp, 0), arg1 = TREE_OPERAND (exp, 1);
-      if (TREE_CODE_CLASS (code) == '<' || TREE_CODE_CLASS (code) == '1'
+
+      if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code)))
+	{
+	  arg0 = TREE_OPERAND (exp, 0);
+	  if (TREE_CODE_CLASS (code) == '<' 
+	      || TREE_CODE_CLASS (code) == '1'
 	      || TREE_CODE_CLASS (code) == '2')
 	    type = TREE_TYPE (arg0);
+	  if (TREE_CODE_CLASS (code) == '2' 
+	      || TREE_CODE_CLASS (code) == '<'
+	      || (TREE_CODE_CLASS (code) == 'e' 
+		  && tree_code_length[(int) code] > 1))
+	    arg1 = TREE_OPERAND (exp, 1);
+	}
 
       switch (code)
 	{