Bug 71817 - Git Mesa r600g driver crashes while using llvm
Summary: Git Mesa r600g driver crashes while using llvm
Status: RESOLVED NOTABUG
Alias: None
Product: Mesa
Classification: Unclassified
Component: Drivers/Gallium/r600 (show other bugs)
Version: git
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Default DRI bug account
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Reported: 2013-11-20 01:41 UTC by Krzysztof A. Sobiecki
Modified: 2013-11-22 19:45 UTC (History)
1 user (show)

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Attachments
Gdb output after using glxinfo (4.98 KB, text/plain)
2013-11-20 01:41 UTC, Krzysztof A. Sobiecki 		Details
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Description Krzysztof A. Sobiecki 2013-11-20 01:41:09 UTC 
Created attachment 89502 [details]
Gdb output after using glxinfo

R600g crashes while I try to use LLVM support in it.
LLVM: 1:3.4~svn194296-1~exp1
Mesa: e7a5905d8a3960b0981750f8131e3af9acbfcdb8

Error message before segfault:
0x6af6c0: i32 = GlobalAddress<<4 x float> (i32)* @llvm.R600.interp.const> 0 [ORD=1]

Even running glxinfo causes this error.
Comment 1 Krzysztof A. Sobiecki 2013-11-20 04:00:38 UTC 
Tried LLVM version 1:3.4~svn194202-1~exp1 and it have the same problem, and I think it worked with an older Mesa. Will bisect Mesa in the future.
Comment 2 Krzysztof A. Sobiecki 2013-11-20 23:00:50 UTC 
And the winner is:
88c8f1972976c506e8fb048100ed11fef1ca938b is the first bad commit
commit 88c8f1972976c506e8fb048100ed11fef1ca938b
Author: Vincent Lejeune <vljn@ovi.com>
Date:   Wed Oct 30 18:35:58 2013 +0100

    r600/llvm: Store inputs in function arguments

:040000 040000 70bee8674c6b22eda966273cc1f736ed81da3829 10b9d66a3bd9c8328649515d5cf40ce20b022c1b M	src

Thank You.
Comment 3 vincent 2013-11-22 14:17:43 UTC 
You need at least revision @@194425 of llvm 3.4 to have the commit labeled :

commit 70a7d5ddb4f00bbb61afe7b536c6f599f771ab9a
Author: Vincent Lejeune <vljn@ovi.com>
Date:   Mon Nov 11 22:10:24 2013 +0000

    R600: Use function inputs to represent data stored in gpr
    
    git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194425 91177308-0d3
Comment 4 Krzysztof A. Sobiecki 2013-11-22 19:45:06 UTC 
Sorry for the problem.

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