Bug 102694

Summary:	LLVM triggered Diagnostic Handler: Illegal instruction detected: VOP* instruction uses the constant bus more than once
Product:	Mesa	Reporter:	Christoph Haag <haagch>
Component:	Drivers/Gallium/radeonsi	Assignee:	Default DRI bug account <dri-devel>
Status:	RESOLVED FIXED	QA Contact:	Default DRI bug account <dri-devel>
Severity:	normal
Priority:	medium	CC:	john.ettedgui, jrch2k10, libgradev, lordheavym
Version:	git
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Christoph Haag 2017-09-13 07:24:34 UTC

RX 480
mesa git 1bcb953e16600e0d9329b678a6eacee98d326547
llvm-svn 312959

Apitrace: https://haagch.frickel.club/files/AstroKill-Linux-DebugGame.trace.xz

LLVM triggered Diagnostic Handler: Illegal instruction detected: VOP* instruction uses the constant bus more than once
%VGPR4<def> = V_MADMK_F32 %SGPR19<kill>, 1050253722, %VGPR20, %EXEC<imp-use>
LLVM failed to compile shader
radeonsi: can't compile a main shader part

Comment 1 Christoph Haag 2017-09-13 13:01:30 UTC

Many applications are affected. CS:GO, Unigine Heaven, Unigine Valles, but not Unigine Sanctuary.

So it's probably not something obscure but something recently introduced.

Comment 2 Christoph Haag 2017-09-13 13:04:27 UTC

llvm-svn 312776 is okay, llvm-svn 312959 is broken.

Comment 3 Michel Dänzer 2017-09-14 03:10:45 UTC

*** Bug 102714 has been marked as a duplicate of this bug. ***

Comment 4 MIka R 2017-09-14 13:11:29 UTC

This also seems to affect kwin_x11. Memory leaking and some plasma 5 objects flicker mildly.

Comment 5 John 2017-09-15 11:41:56 UTC

Same issue with mpv, and I also went back to 312776 to workaround it.

Comment 6 Christoph Haag 2017-09-18 09:53:59 UTC

Tried unigine heaven with new builds and it works fine now.

Most likely fixed by https://github.com/llvm-mirror/llvm/commit/11283fb2c8458150697e07d68d20ae7fe94325b5

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