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Date: Wed, 27 Oct 2004 19:04:00 -0000
From: Richard Henderson <rth@redhat.com>
To: Zack Weinberg <zack@codesourcery.com>
Cc: "Joseph S. Myers" <jsm@polyomino.org.uk>, gcc-patches@gcc.gnu.org
Subject: Re: New C parser [patch]
Message-ID: <20041027184957.GB18849@redhat.com>
Mail-Followup-To: Richard Henderson <rth@redhat.com>,
	Zack Weinberg <zack@codesourcery.com>,
	"Joseph S. Myers" <jsm@polyomino.org.uk>, gcc-patches@gcc.gnu.org
References: <Pine.LNX.4.61.0410222353190.30813@digraph.polyomino.org.uk> <Pine.LNX.4.61.0410242017170.7018@digraph.polyomino.org.uk> <873c02e46k.fsf@codesourcery.com>
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On Mon, Oct 25, 2004 at 05:03:31PM -0700, Zack Weinberg wrote:
> The only way
> asm() at top level can continue to make sense is if we pass it along
> to cgraph, and somehow get cgraph to preserve the global order of
> functions and asm()s.  [Mind you, I would not have any problem with
> dropping this feature.]

False.

----
static void doit(int, int);

__asm__("\
	.ent doit	\n\
doit:			\n\
	...		\n\
	ret		\n\
	.end doit	\n\
");

void foo(int a)
{
  doit(a, a+1);
}
----

For non-trivial definitions of doit, this can be extremely useful.
Glibc, for instance, uses this in ld.so.


r~