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

[Luca B. <luc...@gm...>]

> This might depend on the target: R600+, for example, is quite
> scalar-oriented anyway (modulo a lot of subtle limitations), so just
> pretending that everything is scalar could work well there since
> revectorizing is almost unnecessary.

Interesting, nv50 is also almost fully scalar, and based on the
Gallium driver source, i965 seems to be scalar too.

So it seems it would really make sense to also have a scalar IR,
whether LLVM IR or something else.

Of course, "scalar" is usually actually SoA SIMD, but that's mostly
hidden, except for things like barriers, join points and nv50 "voting"
instructions.