Re: [Mesa3d-dev] RFC: GSOC Proposal: R300/Gallium GLSL Compiler

[Zack R. <za...@vm...>]

On Saturday 03 April 2010 18:58:36 Marek Olšák wrote:
> On Sun, Apr 4, 2010 at 12:10 AM, Zack Rusin
>  <za...@vm...<mailto:za...@vm...>> wrote: I thought the initial
>  proposal was likely a lot more feasible for a GSOC (of course there one
>  has to point out that Mesa's GLSL compiler already does unroll loops and
>  in general simplifies control-flow so the points #1 and #2 are largely
>  no-ops, but surely there's enough work on Gallium Radeon's drivers left to
>  keep Tom busy). Otherwise having a well-defined and reduced scope with
>  clear deliverables would be rather necessary for LLVM->TGSI code because
>  that is not something that you could get rock solid over a summer.
> 
> It doesn't seem to simplify branches or unroll loops that much, if at all.

It does for cases where the arguments are known.


>  It fails even for the simplest cases like this one:
> 
>     if (gl_Vertex.x < 30.0)

which is unknown at the compilation time.

z