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From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 103743] Nier:Automata - "if" in fragment shader incorrectly evaluated, causes artifacts
Date: Mon, 27 Nov 2017 20:42:08 +0000	[thread overview]
Message-ID: <bug-103743-502-eNTjO83tn1@http.bugs.freedesktop.org/> (raw)
In-Reply-To: <bug-103743-502@http.bugs.freedesktop.org/>


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https://bugs.freedesktop.org/show_bug.cgi?id=103743

--- Comment #6 from Nicolai Hähnle <nhaehnle@gmail.com> ---
Thanks. To give you an update, this is a super subtle control flow handling bug
in LLVM -- and the difference between the original shader and your modification
at the LLVM input is merely that the sense of one branch is (correctly)
inverted, leading LLVM down a subtly different path in the end.

A sledge-hammer fix is quite simple, but I'm still thinking about how to get a
better fix which doesn't pessimize a bunch of cases.

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  parent reply	other threads:[~2017-11-27 20:42 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-11-14 18:09 [Bug 103743] Nier:Automata - "if" in fragment shader incorrectly evaluated, causes artifacts bugzilla-daemon
2017-11-14 18:10 ` bugzilla-daemon
2017-11-14 18:10 ` bugzilla-daemon
2017-11-14 18:21 ` bugzilla-daemon
2017-11-27 11:02 ` bugzilla-daemon
2017-11-27 12:04 ` bugzilla-daemon
2017-11-27 20:42 ` bugzilla-daemon [this message]
2017-11-28 12:27 ` bugzilla-daemon
2017-11-28 12:28 ` bugzilla-daemon
2017-11-28 17:31 ` bugzilla-daemon
2017-11-28 17:33 ` bugzilla-daemon
2017-11-28 17:34 ` bugzilla-daemon
2018-04-18  9:50 ` bugzilla-daemon
2018-04-28 14:09 ` bugzilla-daemon
2019-02-18  1:36 ` bugzilla-daemon
2019-09-17  2:49 ` bugzilla-daemon

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