+2003-09-26 Richard Sandiford <rsandifo@redhat.com>
+
+ * expr.c (emit_move_insn_1): If there is no move pattern for the
+ original mode, try using a pattern for the corresponding integer mode.
+
2003-09-26 Richard Sandiford <rsandifo@redhat.com>
* combine.c (if_then_else_cond): Tighten mode check.
return emit_insn (GEN_FCN (insn_code) (x, y));
}
+ /* Try using a move pattern for the corresponding integer mode. This is
+ only safe when simplify_subreg can convert MODE constants into integer
+ constants. At present, it can only do this reliably if the value
+ fits within a HOST_WIDE_INT. */
+ else if (GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT
+ && (submode = int_mode_for_mode (mode)) != BLKmode
+ && mov_optab->handlers[submode].insn_code != CODE_FOR_nothing)
+ return emit_insn (GEN_FCN (mov_optab->handlers[submode].insn_code)
+ (simplify_gen_subreg (submode, x, mode, 0),
+ simplify_gen_subreg (submode, y, mode, 0)));
+
/* This will handle any multi-word or full-word mode that lacks a move_insn
pattern. However, you will get better code if you define such patterns,
even if they must turn into multiple assembler instructions. */