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

[Hal Finkel via llvm-dev]

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