Re: [patch] Prevent dead code/data removal with gcc 3.4

[Jun Sun <jsun@mvista.com>]

On Fri, Feb 13, 2004 at 03:53:16PM +0100, Ralf Baechle wrote:
> On Fri, Feb 13, 2004 at 03:20:27PM +0100, Maciej W. Rozycki wrote:
> 
> > 2. It changes inline-assembly function prologues to be embedded within the
> > functions, which makes them a bit safer as they can now explicitly refer
> > to the "regs" struct and assures the code won't be removed or reordered.
> 
> It is possible that gcc changes one of the registers before save_static
> and I can't imagine there's a reliable way to fix this in the inline
> version.
> 

Yes.  I still remember this bug vividly.  It took me quite a few days
to track it down.

I really wish there is a more reliable and systematic way to do this, 
even at some expense of a few more instructions ...

Jun