{
CUMULATIVE_ARGS *argsp = get_cumulative_args (argsp_v);
+ /* The mode of the argument will be VOIDmode for the "end_marker". Make sure
+ we don't ever generate a VOIDmode register; later passes will barf on that.
+ We may want to use the register number, so return something nominally
+ useful. Thus, for VOIDmode, use DImode, being the natural mode for the
+ register. */
+ machine_mode mode = arg.mode == VOIDmode ? DImode : arg.mode;
+
/* Last-argument marker. */
if (arg.end_marker_p ())
return (argsp->regs < MMIX_MAX_ARGS_IN_REGS)
- ? gen_rtx_REG (arg.mode,
+ ? gen_rtx_REG (mode,
(incoming
? MMIX_FIRST_INCOMING_ARG_REGNUM
: MMIX_FIRST_ARG_REGNUM) + argsp->regs)
return (argsp->regs < MMIX_MAX_ARGS_IN_REGS
&& !targetm.calls.must_pass_in_stack (arg)
- && (GET_MODE_BITSIZE (arg.mode) <= 64
+ && (GET_MODE_BITSIZE (mode) <= 64
|| argsp->lib
|| TARGET_LIBFUNC))
- ? gen_rtx_REG (arg.mode,
+ ? gen_rtx_REG (mode,
(incoming
? MMIX_FIRST_INCOMING_ARG_REGNUM
: MMIX_FIRST_ARG_REGNUM)