[Bug 96877] Bioshock Infinite: LLVM triggered Diagnostic Handler: Illegal instruction detected: Operand has incorrect register class.

[Bug 96877] Bioshock Infinite: LLVM triggered Diagnostic Handler: Illegal instruction detected: Operand has incorrect register class.

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https://bugs.freedesktop.org/show_bug.cgi?id=96877

            Bug ID: 96877
           Summary: Bioshock Infinite: LLVM triggered Diagnostic Handler:
                    Illegal instruction detected: Operand has incorrect
                    register class.
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: haagch@frickel.club
        QA Contact: dri-devel@lists.freedesktop.org

This happens on my HD 7970M.

"Very Low" graphics settings work fine but trying to start with "Medium"
settings throws this error before it even gets to the menu.

The files are bit too big for bugzilla I think, so

Here is an stderr log with R600_DEBUG="vs,ps,gs,tes,tcs":
http://haagch.frickel.club/files/err.txt.gz

Here is an apitrace that causes the error:
http://haagch.frickel.club/files/bioshock.i386.trace.xz

Happened with latest mesa git and llvm 3.9.0svn_r274975 and now with
3.9.0svn_r275008 too.

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[Bug 96877] Bioshock Infinite: LLVM triggered Diagnostic Handler: Illegal instruction detected: Operand has incorrect register class.

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https://bugs.freedesktop.org/show_bug.cgi?id=96877

--- Comment #1 from Nicolai Hähnle <nhaehnle@gmail.com> ---
Created attachment 124987
  --> https://bugs.freedesktop.org/attachment.cgi?id=124987&action=edit
Reduced test case, fails with llc -march=amdgcn -verify-machineinstrs

I can reproduce this, and I obtained the attached reduced testcase which has an
error since r274954 "AMDGPU: Improve offset folding for register indexing". I'm
not sure how that change is related to the particular error that I get...

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[Bug 96877] Bioshock Infinite: LLVM triggered Diagnostic Handler: Illegal instruction detected: Operand has incorrect register class.

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https://bugs.freedesktop.org/show_bug.cgi?id=96877

--- Comment #2 from Nicolai Hähnle <nhaehnle@gmail.com> ---
Created attachment 124989
  --> https://bugs.freedesktop.org/attachment.cgi?id=124989&action=edit
Treat insert and extract equally in selectMOVRELOffsetImpl

The attached patch fixes the bug for me.

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[Bug 96877] Bioshock Infinite: LLVM triggered Diagnostic Handler: Illegal instruction detected: Operand has incorrect register class.

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https://bugs.freedesktop.org/show_bug.cgi?id=96877

--- Comment #3 from Michel Dänzer <michel@daenzer.net> ---
FWIW, Nicolai's patch seems to fix lots of piglit regressions on my Kaveri.

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[Bug 96877] Bioshock Infinite: LLVM triggered Diagnostic Handler: Illegal instruction detected: Operand has incorrect register class.

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https://bugs.freedesktop.org/show_bug.cgi?id=96877

--- Comment #4 from Nicolai Hähnle <nhaehnle@gmail.com> ---
Another update: there are two separate problems in LLVM which "cooperate" to
lead to this bug. http://reviews.llvm.org/D22210 and
http://reviews.llvm.org/D22217 fix both problems (and either is sufficient for
this bug here).

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[Bug 96877] Bioshock Infinite: LLVM triggered Diagnostic Handler: Illegal instruction detected: Operand has incorrect register class.

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https://bugs.freedesktop.org/show_bug.cgi?id=96877

Christoph Haag <haagch@frickel.club> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED

--- Comment #5 from Christoph Haag <haagch@frickel.club> ---
Both of these are in in llvm svn now.

Enabling and disabling anti aliasing works without this error.
Thanks for the fix.

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