Bug 20375 - ia64 varadic regression

[Nathan Sidwell]

Dave Korn wrote:

>   There was under varargs, which didn't require to pass a named argument to
> va_start; it's only with stdargs that it would be impossible.
> 
>   I suspect that this is the underlying reason for the code having developed
> this way:  sometimes the first variadic arg is the last named arg (stdargs),
> sometimes it is the first arg _after_ the last named arg.
> 
ah, yes, that explains the later comment
    /* Handle stdargs.  LAST_NAMED is a slight mis-nomer; it's also true
	 for the unnamed dummy argument following the last named argument.
	 See ABI silliness wrt strict_argument_naming and NAMED_ARG.  So
	 we only want to do this when we get to the actual last named
	 argument, which will be the first time LAST_NAMED gets set.  */
I was trying to work out what the 'unnamed dummy argument' was.  As we
no longer support varargs, this can be excised.

nathan

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