combine.c (combine_simplify_rtx): Update comment and remove erroneous test.

	* combine.c (combine_simplify_rtx): Update comment and
	remove erroneous test.

From-SVN: r44703

gcc/ChangeLog

+2001-08-08  Graham Stott  <grahams@redhat.com>
+
+	* combine.c (combine_simplify_rtx): Update comment and
+	remove erroneous test.
+
 2001-08-07  Neil Booth  <neil@daikokuya.demon.co.uk>
 
 	* cppinit.c (cpp_finish): Pop the final buffer without comment.

gcc/combine.c

@@ -3856,13 +3856,12 @@ combine_simplify_rtx (x, op0_mode, last, in_dest)
 					      XEXP (XEXP (x, 0), 1))))
 	return reversed;
 
-      /* (ashiftrt foo C) where C is the number of bits in FOO minus 1
-	 is (lt foo (const_int 0)) if STORE_FLAG_VALUE is -1, so we can
+      /* (not (ashiftrt foo C)) where C is the number of bits in FOO minus 1
+	 is (ge foo (const_int 0)) if STORE_FLAG_VALUE is -1, so we can
 	 perform the above simplification.  */
 
       if (STORE_FLAG_VALUE == -1
 	  && GET_CODE (XEXP (x, 0)) == ASHIFTRT
-	  && XEXP (x, 1) == const1_rtx
 	  && GET_CODE (XEXP (XEXP (x, 0), 1)) == CONST_INT
 	  && INTVAL (XEXP (XEXP (x, 0), 1)) == GET_MODE_BITSIZE (mode) - 1)
 	return gen_rtx_GE (mode, XEXP (XEXP (x, 0), 0), const0_rtx);