[llvm-dev] [Release-testers] [8.0.0 Release] rc2 has been tagged

[Brian Cain via llvm-dev]

Any tips or suggestions on how to isolate or identify this defect?  It
seems non-trivial to bisect this failure.

Hans: presumably this bug should block the 8.0 release?

On Mon, Feb 11, 2019 at 8:37 AM Brian Cain <brian.cain at gmail.com> wrote:

> rc1 did not exhibit this mismatch.  A repeat of the rc2 build repeated the
> mismatch.  I diff'd the disassembly between phase 2 and phase 3 and the
> difference is the same on both builds.  The difference follows:
>
> # diff x86isel_p{2,3}.s
> 2c2
> <
> Phase2/Release/llvmCore-8.0.0-rc2.obj/lib/Target/X86/CMakeFiles/LLVMX86CodeGen.dir/X86ISelLowering.cpp.o:
>    file format elf64-x86-64
> ---
> >
> Phase3/Release/llvmCore-8.0.0-rc2.obj/lib/Target/X86/CMakeFiles/LLVMX86CodeGen.dir/X86ISelLowering.cpp.o:
>    file format elf64-x86-64
> 121757c121757
> <      863:     48 8b 84 24 e0 05 00    mov    0x5e0(%rsp),%rax
> ---
> >      863:     48 8b 84 24 b0 01 00    mov    0x1b0(%rsp),%rax
> 121759c121759
> <      86b:     48 33 84 24 b0 01 00    xor    0x1b0(%rsp),%rax
> ---
> >      86b:     48 33 84 24 e0 05 00    xor    0x5e0(%rsp),%rax
> 121761,121762c121761,121762
> <      873:     8b 8c 24 e8 05 00 00    mov    0x5e8(%rsp),%ecx
> <      87a:     33 8c 24 b8 01 00 00    xor    0x1b8(%rsp),%ecx
> ---
> >      873:     8b 8c 24 b8 01 00 00    mov    0x1b8(%rsp),%ecx
> >      87a:     33 8c 24 e8 05 00 00    xor    0x5e8(%rsp),%ecx
>
>
> On Sat, Feb 9, 2019 at 9:54 AM Brian Cain <brian.cain at gmail.com> wrote:
>
>> rc2 build on Ubuntu 16.04 saw a stage 2/3 mismatch on
>> X86IselLowering.cpp.o -- I didn't try to build rc1 for 16.04 but I can try
>> it now to see if it's there too.
>>
>> I can pass along logs if anyone wants to investigate.
>>
>> On Thu, Feb 7, 2019 at 9:41 AM Hans Wennborg via Release-testers <
>> release-testers at lists.llvm.org> wrote:
>>
>>> Dear testers,
>>>
>>> 8.0.0-rc2 has been tagged from the release_80 branch at r353413.
>>>
>>> Please run the test script, share your results, and upload binaries.
>>>
>>> I'll get the source tarballs and docs published as soon as possible,
>>> and binaries as they become available.
>>>
>>> Thanks,
>>> Hans
>>> _______________________________________________
>>> Release-testers mailing list
>>> Release-testers at lists.llvm.org
>>> https://lists.llvm.org/cgi-bin/mailman/listinfo/release-testers
>>>
>>
>>
>>
>
> --
> -Brian
>


-- 
-Brian
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