[Bug 92793] Precision qualifier information gets lost
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Sun Nov 15 21:36:45 PST 2015
https://bugs.freedesktop.org/show_bug.cgi?id=92793
--- Comment #5 from Tapani Pälli <lemody at gmail.com> ---
(In reply to Kenneth Graunke from comment #4)
> FWIW, these changes broke tessellation shaders...I had to revert
>
> commit 5bd122cad9d16596f89260f3b115cd0fb72cb886
> glsl: do not lose precision information when packing varyings
>
> commit f84bc57d7dc02fceb805803131426c791eadeff9
> glsl: Add precision information to ir_variable
>
> to prevent the linker from saying that gl_PerVertex blocks don't match up.
>
> Ilia confirmed that this broke tessellation for Nouveau.
>
> If you want to try it on Intel (Broadwell only), you can grab my 'tess'
> branch and run:
> $ shader_runner tests/spec/arb_tessellation_shader/execution/nop.shader_test
>
> (you'll need to rebase -i out my reverts of those patches to trigger the bug)
sorry about this, I'll take a look at what is wrong, precision should be
ignored on desktop
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