+Thu Nov 15 08:36:39 2001 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
+
+ * final.c (alter_subreg): If simplify_subreg can't do anything,
+ handle REG ourselves and abort for others.
+
2001-11-15 Richard Hodson <hodsonr@dionecorp.com>
* config/h8300/h8300.c (dosize): Avoid corrupting R3 in interrupt
if (GET_CODE (y) == MEM)
*xp = adjust_address (y, GET_MODE (x), SUBREG_BYTE (x));
else
- *xp = simplify_subreg (GET_MODE (x), y, GET_MODE (y), SUBREG_BYTE (x));
+ {
+ rtx new = simplify_subreg (GET_MODE (x), y, GET_MODE (y),
+ SUBREG_BYTE (x));
+
+ if (new != 0)
+ *xp = new;
+ /* Simplify_subreg can't handle some REG cases, but we have to. */
+ else if (GET_CODE (y) == REG)
+ {
+ REGNO (x) = subreg_hard_regno (x, 1);
+ PUT_CODE (x, REG);
+ ORIGINAL_REGNO (x) = ORIGINAL_REGNO (y);
+ /* This field has a different meaning for REGs and SUBREGs. Make
+ sure to clear it! */
+ x->used = 0;
+ }
+ else
+ abort ();
+ }
+
return *xp;
}