enhance .loc directive for dwarf3 special features

[Daniel Jacobowitz]

On Wed, Sep 07, 2005 at 04:49:11AM -0700, Richard Henderson wrote:
> This patch adds some sub-directives to ".loc" to enable access to
> the entire dwarf3 state machine.  Well, actually, two of these
> were present in dwarf2 and we hadn't exposed them either.
>
> I think the syntax is fairly clean, but if someone thinks we should
> use separate directives like ".loc_basic_block", speak now or forever
> hold your peace.

Hmm, I would have expected:

	.loc [FILE LINE [COLUMN]] [basic_block] [is_stmt [VALUE]]

et cetera.  I think it's still unambiguous.  The chattier we make these
things, the longer it'll take to assemble them... but probably not a
big deal.

Awesome to see this implemented.

-- 
Daniel Jacobowitz
CodeSourcery, LLC