+2010-10-19 Nick Clifton <nickc@redhat.com>
+
+ * config/rx/rx.c (rx_function_value): Small integer types are
+ promotes to SImode.
+ (rx_promote_function_mode): New function.
+ (TARGET_PROMOTE_FUNCTION_MODE): Define.
+
2010-10-19 Nick Clifton <nickc@redhat.com>
* config/mep/mep.c (mep_print_operand): Use
const_tree fn_decl_or_type ATTRIBUTE_UNUSED,
bool outgoing ATTRIBUTE_UNUSED)
{
- return gen_rtx_REG (TYPE_MODE (ret_type), FUNC_RETURN_REGNUM);
+ enum machine_mode mode = TYPE_MODE (ret_type);
+
+ /* RX ABI specifies that small integer types are
+ promoted to int when returned by a function. */
+ if (GET_MODE_SIZE (mode) > 0 && GET_MODE_SIZE (mode) < 4)
+ return gen_rtx_REG (SImode, FUNC_RETURN_REGNUM);
+
+ return gen_rtx_REG (mode, FUNC_RETURN_REGNUM);
+}
+
+/* TARGET_PROMOTE_FUNCTION_MODE must behave in the same way with
+ regard to function returns as does TARGET_FUNCTION_VALUE. */
+
+static enum machine_mode
+rx_promote_function_mode (const_tree type ATTRIBUTE_UNUSED,
+ enum machine_mode mode,
+ int * punsignedp,
+ const_tree funtype ATTRIBUTE_UNUSED,
+ int for_return)
+{
+ if (for_return != 1
+ || GET_MODE_SIZE (mode) >= 4
+ || GET_MODE_SIZE (mode) < 1)
+ return mode;
+
+ return SImode;
}
static bool
#undef TARGET_OPTION_OVERRIDE
#define TARGET_OPTION_OVERRIDE rx_option_override
+#undef TARGET_PROMOTE_FUNCTION_MODE
+#define TARGET_PROMOTE_FUNCTION_MODE rx_promote_function_mode
+
#undef TARGET_OVERRIDE_OPTIONS_AFTER_CHANGE
#define TARGET_OVERRIDE_OPTIONS_AFTER_CHANGE rx_override_options_after_change