+2002-02-04 Richard Henderson <rth@redhat.com>
+
+ * combine.c (nonzero_bits): Re-introduce special case for
+ sp/fp/ap wrt REGNO_POINTER_ALIGN.
+
2002-02-05 Aldy Hernandez <aldyh@redhat.com>
* doc/extend.texi: Warn about unsupported usage of altivec
#endif
/* Include declared information about alignment of pointers. */
-
- if (REG_POINTER (x) && REGNO_POINTER_ALIGN (REGNO (x)))
+ /* ??? We don't properly preserve REG_POINTER changes across
+ pointer-to-integer casts, so we can't trust it except for
+ things that we know must be pointers. See execute/960116-1.c. */
+ if ((x == stack_pointer_rtx
+ || x == frame_pointer_rtx
+ || x == arg_pointer_rtx)
+ && REGNO_POINTER_ALIGN (REGNO (x)))
{
unsigned HOST_WIDE_INT alignment
= REGNO_POINTER_ALIGN (REGNO (x)) / BITS_PER_UNIT;