PATCH: Add pause intrinsic

[Andrew Haley]

On 05/26/2011 08:37 PM, Basile Starynkevitch wrote:
> On Thu, 26 May 2011 13:48:13 -0400
> Paul Koning <paul_koning@dell.com> wrote:
> 
>> Relax?  Weird.  "Pause" is just as weird.  It might be an ia32 instruction, 
>> so as an ia32 builtin it is a reasonable name  But if you want a generic 
>> builtin, you need a name that actually has some plausible connection with 
>> what it does, and neither "pause" nor "relax" do that.
> 
> I still think that having a builtin which do a "compiler flush" that is
> which spill all registers to memory is useful, eg a
> builtin_compiler_flush()

I don't see how it can do that without causing reload failures.  You'd
have to be very careful somehow to identify user variables.

Andrew.