[Bug 110953] Adding a redundant single-iteration do-while loop causes different image to be rendered

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Jun 21 14:38:32 UTC 2019


--- Comment #7 from Abel Briggs <abelbriggs1 at hotmail.com> ---
(In reply to Ian Romanick from comment #6)
> This MR should fix the bug:
> https://gitlab.freedesktop.org/mesa/mesa/merge_requests/1152
> And this MR has a minimal test case:
> https://gitlab.freedesktop.org/mesa/piglit/merge_requests/88
> I'm running both through Intel's CI on G33 hardware.  That very, very old
> hardware has OpenGL ES 2.0, but it does not use the NIR loop unrolling path.
> It should hit this bug... I'll find out for sure in the morning.  I tried
> the test and the fix on my local machine using softpipe.
> @abel: Can you test the fix on nouveau?

I pulled your repo and ran the shader, and I can confirm that the issue is
fixed (the reference and variant now render the same image).

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