[Bug 69897] New: OpenCL kernel fails to compile with R600 LLVM backend

[Bug 69897] New: OpenCL kernel fails to compile with R600 LLVM backend

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=69897

          Priority: medium
            Bug ID: 69897
          Assignee: dri-devel@lists.freedesktop.org
           Summary: OpenCL kernel fails to compile with R600 LLVM backend
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: greg@chown.ath.cx
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: Drivers/Gallium/r600
           Product: Mesa

Created attachment 86758
  --> https://bugs.freedesktop.org/attachment.cgi?id=86758&action=edit
Kernel source code with headers

The attached kernel fails to compile with this error message:

PRT: /home/greg/build/llvm/lib/Target/R600/AMDILCFGStructurizer.cpp:1115: int
<anonymous namespace>::AMDGPUCFGStructurizer::mergeLoop(llvm::MachineLoop *):
Assertion `ExitBlkSet.size() == 1' failed.
Stack dump:
0.    Running pass 'Function Pass Manager' on module 'radeon'.
1.    Running pass 'AMD IL Control Flow Graph structurizer Pass' on function
'@shadow_ao'

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[Bug 69897] OpenCL kernel fails to compile with R600 LLVM backend

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https://bugs.freedesktop.org/show_bug.cgi?id=69897

--- Comment #1 from Tom Stellard <tstellar@gmail.com> ---
Created attachment 86759
  --> https://bugs.freedesktop.org/attachment.cgi?id=86759&action=edit
Possible Fix

Does this patch help?

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[Bug 69897] OpenCL kernel fails to compile with R600 LLVM backend

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https://bugs.freedesktop.org/show_bug.cgi?id=69897

--- Comment #2 from Grigori Goronzy <greg@chown.ath.cx> ---
It seems to fix the initial problem, but now I'm getting something else:

PRT: /home/greg/build/llvm/include/llvm/Support/Casting.h:239: typename
cast_retty<X, Y *>::ret_type llvm::cast(Y *) [X = llvm::BranchInst, Y =
llvm::TerminatorInst]: Assertion `isa<X>(Val) && "cast<Ty>() argument of
incompatible type!"' failed.
Stack dump:
0.    Running pass 'Function Pass Manager' on module 'radeon'.
1.    Running pass 'Region Pass Manager' on function '@shadow_ao'
2.    Running pass 'Structurize control flow' on basic block '%if.end100'

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[Bug 69897] OpenCL kernel fails to compile with R600 LLVM backend

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https://bugs.freedesktop.org/show_bug.cgi?id=69897

--- Comment #3 from Tom Stellard <tstellar@gmail.com> ---
Created attachment 86760
  --> https://bugs.freedesktop.org/attachment.cgi?id=86760&action=edit
Possible Fix Part 2

Try applying this patch along with the first fix.

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[Bug 69897] OpenCL kernel fails to compile with R600 LLVM backend

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https://bugs.freedesktop.org/show_bug.cgi?id=69897

--- Comment #4 from Grigori Goronzy <greg@chown.ath.cx> ---
Still fails, but it's getting even further:

LLVM ERROR: Not supported instr: <MCInst 292 <MCOperand Reg:1495> <MCOperand
Reg:980> <MCOperand Imm:0> <MCOperand Imm:0>>

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[Bug 69897] OpenCL kernel fails to compile with R600 LLVM backend

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=69897

--- Comment #5 from Tom Stellard <tstellar@gmail.com> ---
Created attachment 86761
  --> https://bugs.freedesktop.org/attachment.cgi?id=86761&action=edit
Fix part 3

Can you try this patch with the other two?

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[Bug 69897] OpenCL kernel fails to compile with R600 LLVM backend

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https://bugs.freedesktop.org/show_bug.cgi?id=69897

--- Comment #6 from Grigori Goronzy <greg@chown.ath.cx> ---
Now it compiles fine, but locks up the GPU. This might be an issue with this
particular kernel, though.

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[Bug 69897] OpenCL kernel fails to compile with R600 LLVM backend

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https://bugs.freedesktop.org/show_bug.cgi?id=69897

Jan Vesely <jv356@scarletmail.rutgers.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |99553


Referenced Bugs:

https://bugs.freedesktop.org/show_bug.cgi?id=99553
[Bug 99553] Tracker bug for runnning OpenCL applications on Clover
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[Bug 69897] OpenCL kernel fails to compile with R600 LLVM backend

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https://bugs.freedesktop.org/show_bug.cgi?id=69897

--- Comment #7 from Vedran Miletić <vedran@miletic.net> ---
Grigori, can you repost the kernel?

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[Bug 69897] OpenCL kernel fails to compile with R600 LLVM backend

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https://bugs.freedesktop.org/show_bug.cgi?id=69897

Jan Vesely <jv356@scarletmail.rutgers.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #86758|text/plain                  |application/tar+gzip
          mime type|                            |

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[Bug 69897] OpenCL kernel fails to compile with R600 LLVM backend

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https://bugs.freedesktop.org/show_bug.cgi?id=69897

GitLab Migration User <gitlab-migration@fdo.invalid> changed:

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

--- Comment #8 from GitLab Migration User <gitlab-migration@fdo.invalid> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/mesa/mesa/issues/465.

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