+Fri Jul 18 15:22:28 2003 Alexandre Oliva <aoliva@redhat.com>
+
+ * combine.c (combinable_i3pat): Don't forbid occurrences of
+ i2dest or i1dest in inner_dest if inner_dest is a mem.
+
Fri Jul 18 17:05:57 CEST 2003 Jan Hubicka <jh@suse.cz>
* cgraph.c (cgraph_remove_node): Clear the hash table slot.
|| GET_CODE (inner_dest) == ZERO_EXTRACT)
inner_dest = XEXP (inner_dest, 0);
- /* Check for the case where I3 modifies its output, as
- discussed above. */
- if ((inner_dest != dest
+ /* Check for the case where I3 modifies its output, as discussed
+ above. We don't want to prevent pseudos from being combined
+ into the address of a MEM, so only prevent the combination if
+ i1 or i2 set the same MEM. */
+ if ((inner_dest != dest &&
+ (GET_CODE (inner_dest) != MEM
+ || rtx_equal_p (i2dest, inner_dest)
+ || (i1dest && rtx_equal_p (i1dest, inner_dest)))
&& (reg_overlap_mentioned_p (i2dest, inner_dest)
|| (i1dest && reg_overlap_mentioned_p (i1dest, inner_dest))))