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Hal Finkel via llvm-dev

2016-Sep-07 12:40 UTC

[llvm-dev] [PowerPC] Recent branch too far breakage

----- Original Message -----> From: "Hal Finkel via llvm-dev" <llvm-dev at
lists.llvm.org>
> To: "Richard Pennington" <rich at pennware.com>
> Cc: llvm-dev at lists.llvm.org
> Sent: Wednesday, September 7, 2016 7:37:50 AM
> Subject: Re: [llvm-dev] [PowerPC] Recent branch too far breakage
> 
> Hi Rich,
> 
> It is hard to tell, but there was a bug fix made to the branch
> relaxation code; perhaps the fix was not bug free -- Could this have
> been caused by r280626?
Is this a release or a debug build?

 -Hal
> 
>  -Hal
> 
> ----- Original Message -----
> > From: "Richard Pennington via llvm-dev" <llvm-dev at
lists.llvm.org>
> > To: llvm-dev at lists.llvm.org
> > Sent: Wednesday, September 7, 2016 7:29:25 AM
> > Subject: [llvm-dev] [PowerPC] Recent branch too far breakage
> > 
> > I'm using a recent revision of TOT (280704) to build clang/LLVM
for
> > PowerPC64 little endian. I'm getting an assembler error when
> > building
> > PPCInstPrinter.cpp:
> > 
> > The error is:
> > 
> > /tmp/PPCInstPrinter-84c835.s: Assembler messages:
> > /tmp/PPCInstPrinter-84c835.s:7671: Error: operand out of range
> > (0x0000000000008004 is not between 0xffffffffffff8000 and
> > 0x0000000000007ffc)
> > 
> > The offending line is the bne branch in this snippet:
> > 
> > .LBB24_787:
> >          ld 3, 16(29)
> >          ld 4, 24(29)
> >          sub      4, 4, 3
> >          rldicl 4, 4, 60, 4
> >          cmplwi 0, 4, 3
> >          bne      0, .LBB24_2630
> > 
> > Could this be because of a recent change in the PowerPC code
> > generator
> > or just because PPCInstPrinter.cpp changed a bit and exposed a
> > pre-existing bug?
> > 
> > 
> > -Rich
> > 
> > _______________________________________________
> > LLVM Developers mailing list
> > llvm-dev at lists.llvm.org
> > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
> > 
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
> 
-- 
Hal Finkel
Assistant Computational Scientist
Leadership Computing Facility
Argonne National Laboratory

Richard Pennington via llvm-dev

2016-Sep-07 13:00 UTC

head link

[llvm-dev] [PowerPC] Recent branch too far breakage

On 09/07/2016 07:40 AM, Hal Finkel wrote:> ----- Original Message -----
>> From: "Hal Finkel via llvm-dev" <llvm-dev at
lists.llvm.org>
>> To: "Richard Pennington" <rich at pennware.com>
>> Cc: llvm-dev at lists.llvm.org
>> Sent: Wednesday, September 7, 2016 7:37:50 AM
>> Subject: Re: [llvm-dev] [PowerPC] Recent branch too far breakage
>>
>> Hi Rich,
>>
>> It is hard to tell, but there was a bug fix made to the branch
>> relaxation code; perhaps the fix was not bug free -- Could this have
>> been caused by r280626?
> Is this a release or a debug build?
>
>   -Hal
Hi Hal,

This occurred between r279916 and r280704, so it could have been 
r280626. I'll try to revert it in my code and see if the problem goes away.
It is a release build.

-Rich>>   -Hal
>>
>> ----- Original Message -----
>>> From: "Richard Pennington via llvm-dev" <llvm-dev at
lists.llvm.org>
>>> To: llvm-dev at lists.llvm.org
>>> Sent: Wednesday, September 7, 2016 7:29:25 AM
>>> Subject: [llvm-dev] [PowerPC] Recent branch too far breakage
>>>
>>> I'm using a recent revision of TOT (280704) to build clang/LLVM
for
>>> PowerPC64 little endian. I'm getting an assembler error when
>>> building
>>> PPCInstPrinter.cpp:
>>>
>>> The error is:
>>>
>>> /tmp/PPCInstPrinter-84c835.s: Assembler messages:
>>> /tmp/PPCInstPrinter-84c835.s:7671: Error: operand out of range
>>> (0x0000000000008004 is not between 0xffffffffffff8000 and
>>> 0x0000000000007ffc)
>>>
>>> The offending line is the bne branch in this snippet:
>>>
>>> .LBB24_787:
>>>           ld 3, 16(29)
>>>           ld 4, 24(29)
>>>           sub      4, 4, 3
>>>           rldicl 4, 4, 60, 4
>>>           cmplwi 0, 4, 3
>>>           bne      0, .LBB24_2630
>>>
>>> Could this be because of a recent change in the PowerPC code
>>> generator
>>> or just because PPCInstPrinter.cpp changed a bit and exposed a
>>> pre-existing bug?
>>>
>>>
>>> -Rich
>>>
>>> _______________________________________________
>>> LLVM Developers mailing list
>>> llvm-dev at lists.llvm.org
>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>>
>> _______________________________________________
>> LLVM Developers mailing list
>> llvm-dev at lists.llvm.org
>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>

Hal Finkel via llvm-dev

2016-Oct-03 04:20 UTC

head link

[llvm-dev] [PowerPC] Recent branch too far breakage

Hi Rich,

r283086 should fix this.

Thanks again,
Hal

----- Original Message -----> From: "Richard Pennington" <rich at pennware.com>
> To: "Hal Finkel" <hfinkel at anl.gov>
> Cc: llvm-dev at lists.llvm.org
> Sent: Wednesday, September 7, 2016 8:00:12 AM
> Subject: Re: [llvm-dev] [PowerPC] Recent branch too far breakage
> 
> On 09/07/2016 07:40 AM, Hal Finkel wrote:
> > ----- Original Message -----
> >> From: "Hal Finkel via llvm-dev" <llvm-dev at
lists.llvm.org>
> >> To: "Richard Pennington" <rich at pennware.com>
> >> Cc: llvm-dev at lists.llvm.org
> >> Sent: Wednesday, September 7, 2016 7:37:50 AM
> >> Subject: Re: [llvm-dev] [PowerPC] Recent branch too far breakage
> >>
> >> Hi Rich,
> >>
> >> It is hard to tell, but there was a bug fix made to the branch
> >> relaxation code; perhaps the fix was not bug free -- Could this
> >> have
> >> been caused by r280626?
> > Is this a release or a debug build?
> >
> >   -Hal
> 
> Hi Hal,
> 
> This occurred between r279916 and r280704, so it could have been
> r280626. I'll try to revert it in my code and see if the problem goes
> away.
> It is a release build.
> 
> -Rich
> >>   -Hal
> >>
> >> ----- Original Message -----
> >>> From: "Richard Pennington via llvm-dev" <llvm-dev
at lists.llvm.org>
> >>> To: llvm-dev at lists.llvm.org
> >>> Sent: Wednesday, September 7, 2016 7:29:25 AM
> >>> Subject: [llvm-dev] [PowerPC] Recent branch too far breakage
> >>>
> >>> I'm using a recent revision of TOT (280704) to build
clang/LLVM
> >>> for
> >>> PowerPC64 little endian. I'm getting an assembler error
when
> >>> building
> >>> PPCInstPrinter.cpp:
> >>>
> >>> The error is:
> >>>
> >>> /tmp/PPCInstPrinter-84c835.s: Assembler messages:
> >>> /tmp/PPCInstPrinter-84c835.s:7671: Error: operand out of range
> >>> (0x0000000000008004 is not between 0xffffffffffff8000 and
> >>> 0x0000000000007ffc)
> >>>
> >>> The offending line is the bne branch in this snippet:
> >>>
> >>> .LBB24_787:
> >>>           ld 3, 16(29)
> >>>           ld 4, 24(29)
> >>>           sub      4, 4, 3
> >>>           rldicl 4, 4, 60, 4
> >>>           cmplwi 0, 4, 3
> >>>           bne      0, .LBB24_2630
> >>>
> >>> Could this be because of a recent change in the PowerPC code
> >>> generator
> >>> or just because PPCInstPrinter.cpp changed a bit and exposed a
> >>> pre-existing bug?
> >>>
> >>>
> >>> -Rich
> >>>
> >>> _______________________________________________
> >>> LLVM Developers mailing list
> >>> llvm-dev at lists.llvm.org
> >>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
> >>>
> >> _______________________________________________
> >> LLVM Developers mailing list
> >> llvm-dev at lists.llvm.org
> >> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
> >>
> 
> 
-- 
Hal Finkel
Lead, Compiler Technology and Programming Languages
Leadership Computing Facility
Argonne National Laboratory

llvm dev - Oct 2016 - [PowerPC] Recent branch too far breakage

[llvm-dev] [PowerPC] Recent branch too far breakage

[llvm-dev] [PowerPC] Recent branch too far breakage

[llvm-dev] [PowerPC] Recent branch too far breakage