[Mesa-dev] [PATCH 2/2] i965: Avoid generating MOVs for most ir_assignment handling.

Eric Anholt eric at anholt.net
Wed Nov 2 14:50:15 PDT 2011

On Wed, 19 Oct 2011 19:27:54 -0700, Stéphane Marchesin <stephane.marchesin at gmail.com> wrote:
> On Sat, Aug 27, 2011 at 03:23, Kenneth Graunke <kenneth at whitecape.org> wrote:
> > This is a port of vec4_visitor::try_rewrite_rhs_to_dst to fs_visitor.
> >
> > Not only is this technique less invasive and more robust, it also
> > generates better code.  Over and above the previous technique, this
> > reduced instruction count in shader-db:
> >
> > With all FS optimizations (register coalescing and such) disabled, this
> > reduced instruction count by 6.23% on average and 36% in the best case.
> >
> > With optimizations left enabled, it still reduced instruction count by
> > 0.28% on average and 1.4% in the best case.
> >
> > In no case did this technique result in more code than the prior method.
> >
> Hi,
> This regresses yuv tests in glbench here. The shaders regressing are
> the .glslf files there, and glbench can be found in the same repo:
> http://git.chromium.org/gitweb/?p=chromiumos/third_party/autotest.git;a=tree;f=client/deps/glbench/src;h=8c533f2d21e87c143f512f693947d7a660c2b4bc;hb=HEAD

That gitweb installation doesn't appear to actually provide links to
check out the code, nor is it accessible in some obvious way like
git://git.chromium.org/, nor are the various command lines I'm finding
googling for "chromium git clone autotest" working.

Maybe you could just apitrace it?
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