[PATCH] R600: Add intrinsics for math helper instructions

[Tom Stellard]

On Sun, Jun 22, 2014 at 04:17:16PM -0700, Matt Arsenault wrote:
> 
> On Jun 17, 2014, at 7:10 AM, Tom Stellard <tom at stellard.net> wrote:
> 
> > I think we should replace the r600 in the builtin name with amdgpu, this will
> > prevent some confusion about what hardware is supported on.
> 
> I found a problem with this. getIntrinsicForGCCBuiltin / Clang uses Triple::getArchTypePrefix(), which is “r600” when looking for the GCCBuiltin. It never finds the ones with AMDGPU as the target prefix, so to support both of these prefixes clang would need to specially handle these to support both __builtin prefixes

I normally don't care so much about naming, but in this case I would really
like the builtins to use the amdgpu prefix, because r600 is really confusing.
What other options do we have.  Could we add an amdgpu triple?  Can we
change the getArchTypePrefix() function to return "amdgpu"?

- Tom