[Bug 92793] Precision qualifier information gets lost

[bugzilla-daemon at freedesktop.org]

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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