diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 4a987d567c3..176f4b12ee1 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+Sat Apr 19 14:56:17 CEST 2003  Jan Hubicka  <jh@suse.cz>
+
+	* rtlanal.c (subreg_offset_representable_p):  Fix call of
+	subreg_lowpart.
+
 2003-04-19  Neil Booth  <neil@daikokuya.co.uk>
 
 	* cpphash.h (struct cpp_reader): New member warned_dollar.
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c
index 80fff6310bf..b0c76cc851d 100644
--- a/gcc/rtlanal.c
+++ b/gcc/rtlanal.c
@@ -3432,8 +3432,10 @@ subreg_offset_representable_p (xregno, xmode, offset, ymode)
      redesigned.  */
   if (GET_MODE_SIZE (xmode) % GET_MODE_SIZE (ymode)
       || GET_MODE_SIZE (ymode) % nregs_ymode
-      || mode_for_size (GET_MODE_SIZE (ymode) / nregs_ymode,
-	      		MODE_INT, 0) == VOIDmode
+      || (GET_MODE_BITSIZE (mode_for_size (GET_MODE_BITSIZE (xmode)
+			      		   / nregs_xmode,
+					   MODE_INT, 0))
+	  != GET_MODE_BITSIZE (xmode) / nregs_xmode)
       || nregs_xmode % nregs_ymode)
     abort ();
 #endif
@@ -3441,9 +3443,10 @@ subreg_offset_representable_p (xregno, xmode, offset, ymode)
   /* The XMODE value can be seen as an vector of NREGS_XMODE
      values.  The subreg must represent an lowpart of given field.
      Compute what field it is.  */
-  offset -= subreg_lowpart_offset (mode_for_size (GET_MODE_SIZE (ymode)
-			  			  / nregs_ymode,
-						  MODE_INT, 0), xmode);
+  offset -= subreg_lowpart_offset (ymode, 
+		  		   mode_for_size (GET_MODE_BITSIZE (xmode)
+			  			  / nregs_xmode,
+						  MODE_INT, 0));
 
   /* size of ymode must not be greater than the size of xmode.  */
   mode_multiple = GET_MODE_SIZE (xmode) / GET_MODE_SIZE (ymode);