[PATCH] Add support for coldcc to clang

[Peter Collingbourne]

On Wed, Feb 20, 2013 at 06:30:53PM -0800, John McCall wrote:
> On Feb 20, 2013, at 6:24 PM, Richard Smith <richard at metafoo.co.uk> wrote:
> > On Wed, Feb 20, 2013 at 6:18 PM, John McCall <rjmccall at apple.com> wrote:
> > On Feb 20, 2013, at 6:13 PM, Peter Collingbourne <peter at pcc.me.uk> wrote:
> > > http://llvm-reviews.chandlerc.com/D443
> > 
> > Are you sure we actually *want* to expose this to users?
> > 
> > I would like to mark the UBSan runtime handler functions as __attribute__((coldcc)), and I think that would make sense for other sanitizers too.
> 
> Are we now willing to commit to a fixed ABI for coldcc?  I thought we hadn't been.

Implementing __attribute__((coldcc)) does not necessarily imply fixing
the ABI, provided that we document the attribute as such.  It should
be safe to use in compiler_rt once we modify its build system to use the
just-built clang.

Thanks,
-- 
Peter