[llvm-commits] RFC: R600/SI backend v2

[Tom Stellard]

On Wed, Apr 25, 2012 at 03:30:52PM -0400, Tom Stellard wrote:
> Hi,
> 
> Here is an updated version of the R600/Southern Islands backend for LLVM.
> I've gone through and removed all of the code that wasn't being using by
> the r600g and radeonsi Mesa[1] drivers.  Hopefully, this will make it a
> little easier to review.  I know there are still some style violations,
> but as I said before I'm saving those for last in case there is a lot
> of code churn during the review.  I've split the code up into 6 separate
> patches:
> 
> 1. Core backend code (TargetMachine, RegisterInfo, InstrInfo, etc)
> 2. Tablegen definitions and generated files
> 3. Function passes
> 4. Tests
> 5. Intrinsics added to include/llvm
> 6. Build system changes
> 
> Other than the build system and Intrinsic additions, these patches 
> contain no modifications of LLVM core code.  The patches will follow in
> git send-email format and can also be found in the r600-initial-review
> branch here: http://cgit.freedesktop.org/~tstellar/llvm/
> 
> This backend combines some code from the AMDIL backend that was published
> last December with code emitters for R600 (AMD HD2XXX-HD6XXX) and Southern
> Islands (AMD HD7XXX) GPUs.  The R600 code emitter emits bytecode that
> is understood by the r600 gallium 3D/Compute driver in Mesa, and the
> Southern Islands code emitter emits raw Southern Islands machine code,
> but it is in the very early stages of development, so only a handful of
> instructions are supported.
> 
> This backend currently lives upstream in the Mesa project, but I would
> much prefer to have it in the LLVM project.
> 
> Looking forward to your comments.
> 
> Thanks,
> Tom Stellard
> 
> [1] http://www.mesa3d.org/
> 
> 

Hi,

Has anyone had a chance to look at this yet?  Should I be interpreting
the lack of responses as approval (This is the policy of other Open
Source projects I'm involved in).  Would anyone object to me
committing this in a week if there still haven't been any reviews?

-Tom