[llvm] r232142 - [MachineCopyPropagation] Fix a bug causing incorrect removal for the instruction sequences as follows

[Tom Stellard]

Tim, Evan

Ping for merging this patch to the 3.6 branch.

On Mon, Apr 20, 2015 at 08:27:52AM -0700, Tom Stellard wrote:
> Hi Evan, Tim,
> 
> Is this patch OK for the 3.6 branch?
> 
> http://llvm.org/viewvc/llvm-project?view=revision&revision=232142
> 
> Thanks,
> Tom
> On Mon, Mar 23, 2015 at 09:19:59AM +0800, Hao Liu wrote:
> > Hi Joerg,
> > 
> > It's a bug fix. I think it's better to merge to branch 3.6.
> > 
> > Thanks,
> > -Hao
> > 
> > 2015-03-14 1:47 GMT+08:00 Joerg Sonnenberger <joerg at britannica.bec.de>:
> > > Tom? Tim?
> > >
> > > On Fri, Mar 13, 2015 at 04:34:14PM +0100, Arnaud A. de Grandmaison wrote:
> > >> Yes, I think it is relevant for the 3.6 branch.
> > >>
> > >> Cheers,
> > >> Arnaud
> > >>
> > >> -----Original Message-----
> > >> From: llvm-commits-bounces at cs.uiuc.edu
> > >> [mailto:llvm-commits-bounces at cs.uiuc.edu] On Behalf Of Joerg Sonnenberger
> > >> Sent: 13 March 2015 16:14
> > >> To: llvm-commits at cs.uiuc.edu
> > >> Subject: Re: [llvm] r232142 - [MachineCopyPropagation] Fix a bug causing
> > >> incorrect removal for the instruction sequences as follows
> > >>
> > >> On Fri, Mar 13, 2015 at 05:15:23AM -0000, Hao Liu wrote:
> > >> > Author: haoliu
> > >> > Date: Fri Mar 13 00:15:23 2015
> > >> > New Revision: 232142
> > >> >
> > >> > URL: http://llvm.org/viewvc/llvm-project?rev=232142&view=rev
> > >> > Log:
> > >> > [MachineCopyPropagation] Fix a bug causing incorrect removal for the
> > >> instruction sequences as follows
> > >> >    %Q5_Q6<def> = COPY %Q2_Q3
> > >> >    %D5<def> =
> > >> >    %D3<def> =
> > >> >    %D3<def> = COPY %D6     // Incorrectly removed in
> > >> MachineCopyPropagation
> > >> >    Using of %D3 results in incorrect result ...
> > >> >
> > >> >    Reviewed in http://reviews.llvm.org/D8242
> > >>
> > >> Is this relevant for the 3.6 branch?
> > >>
> > >> Joerg
> > >> _______________________________________________
> > >> llvm-commits mailing list
> > >> llvm-commits at cs.uiuc.edu
> > >> http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
> > >>
> > >>
> > >>
> > >>
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