stor-layout.c (get_mode_alignment): make it work when BITS_PER_UNIT is not a power of two.

        * stor-layout.c (get_mode_alignment): make it work when
        BITS_PER_UNIT is not a power of two.
        * builtins.c (get_pointer_alignment): Likewise.

From-SVN: r44322

gcc/ChangeLog

+2001-07-24  Lars Brinkhoff  <lars@nocrew.org>
+
+	* stor-layout.c (get_mode_alignment): make it work when
+	BITS_PER_UNIT is not a power of two.
+	* builtins.c (get_pointer_alignment): Likewise.
+
 2001-07-24  Richard Henderson  <rth@redhat.com>
 
 	* simplify-rtx.c (avoid_constant_pool_reference): Coerce

gcc/builtins.c

@@ -186,8 +186,8 @@ get_pointer_alignment (exp, max_align)
 	  if (! host_integerp (TREE_OPERAND (exp, 1), 1))
 	    return align;
 
-	  while (((tree_low_cst (TREE_OPERAND (exp, 1), 1) * BITS_PER_UNIT)
-		  & (max_align - 1))
+	  while (((tree_low_cst (TREE_OPERAND (exp, 1), 1))
+		  & (max_align / BITS_PER_UNIT - 1))
 		 != 0)
 	    max_align >>= 1;
 

gcc/stor-layout.c

@@ -1866,10 +1866,11 @@ unsigned int
 get_mode_alignment (mode)
      enum machine_mode mode;
 {
-  unsigned int alignment = GET_MODE_UNIT_SIZE (mode) * BITS_PER_UNIT;
+  unsigned int alignment = GET_MODE_UNIT_SIZE (mode);
   
   /* Extract the LSB of the size.  */
   alignment = alignment & -alignment;
+  alignment *= BITS_PER_UNIT;
 
   alignment = MIN (BIGGEST_ALIGNMENT, MAX (1, alignment));
   return alignment;