[flang-dev] [llvm-dev] [11.0.0 Release] The release branch is here; trunk is now 12.0.0

Fri Jul 17 04:45:02 PDT 2020

Hi Hans

That sounds like a good way forward to me for LLVM 11. Let's see where we are for LLVM 12 and re-evaluate.

Ta
Rich

> -----Original Message-----
> From: Hans Wennborg <hans at chromium.org>
> Sent: 17 July, 2020 12:32
> To: Richard Barton <Richard.Barton at arm.com>
> Cc: Rainer Orth <ro at gcc.gnu.org>; Release-testers <release-
> testers at lists.llvm.org>; flang-dev at lists.llvm.org
> Subject: Re: [llvm-dev] [11.0.0 Release] The release branch is here; trunk is
> now 12.0.0
> 
> I've added the test-release.sh flag in
> https://github.com/llvm/llvm-
> project/commit/033ef8420cec57187fffac1f06322f73aa945c4c
> 
> On Thu, Jul 16, 2020 at 4:41 PM Hans Wennborg <hans at chromium.org>
> wrote:
> >
> > Thanks for the update!
> >
> > We should add a flag to the script for flang regardless (I'll do
> > that), but based on what you write I think it makes sense to keep it
> > off by default. Those who are interested can still build and
> > experiment with it, but I don't think there's much value in forcing
> > all testers to build it.
> >
> > Documenting the status in the release notes sounds great to me.
> >
> > Thanks,
> > Hans
> >
> > On Thu, Jul 16, 2020 at 11:38 AM Richard Barton <Richard.Barton at arm.com>
> wrote:
> > >
> > > Hi Hans, Rainer
> > >
> > > I can describe the status of Flang, but I am not exactly sure what the
> criteria is for a sub-project to be ready for release testing. If there is anything
> missing from my summary please ask.
> > >
> > > Functionally, Flang is able to parse Fortran but is not able to generate the
> corresponding LLVM IR. Flang supports a mode where it unparses the parsed
> Fortran back to Fortran source and then passes it off to another Fortran
> compiler that the user can chose to do codegen.
> > >
> > > In terms of platform support, flang does not support the full list of LLVM
> compilers due to its C++17 requirements, so allowances would need to be
> made for that. We know for sure that Flang does not yet build on Windows
> yet, so we would need to also make an exception for this in LLVM 11 release.
> With downstream testing across the community, we believe that Flang
> should work well for the subset of supported compilers on unix distros on
> Arm and x86_64. Flang is still not well covered by public buildbots. We have
> some for Arm on Ubuntu with modern GCC and clang releases but we lack
> coverage for other distros and other CPU architectures, notably X86_64. We
> have only just fixed shared library builds (on linux) and we'll be asking to
> cherry pick those fixes to the LLVM 11 release branch.
> > >
> > > Because of the above, flang does not build as a default target and does
> not build even with -DLLVM_ENABLE_PROJECTS=all.
> > >
> > > I believe/assume that there is no Fortran code in LNT. If there is, we
> certainly have not tested Flang against it so might expect issues. If I am right
> and there is no Fortran code in the test suite then clearly it is not useful to
> run it for Flang.
> > >
> > > Our thoughts as a community were that we would document the flang
> status in the LLVM 11 release notes so that folks taking the release as source
> could experiment with it if they wanted to. I don't think anyone had a strong
> feeling for whether we should include the pre-built binaries in a release.
> > >
> > > I would certainly not be against trying to add flang here and seeing how
> well it does against the release build and test process and give us feedback
> for things to work on. On the other hand, I would not want to cause undue
> disruption to the release effort, so I think there needs to be appetite to try
> amongst the release testers as well.
> > >
> > >  @Hans Based on this, do you think it would be a good idea to add flang to
> the script at this stage?
> > >
> > > Ta
> > > Rich
> > >
> > >
> > >
> > > > -----Original Message-----
> > > > From: llvm-dev <llvm-dev-bounces at lists.llvm.org> On Behalf Of Hans
> > > > Wennborg via llvm-dev
> > > > Sent: 15 July, 2020 13:42
> > > > To: Rainer Orth <ro at gcc.gnu.org>
> > > > Cc: Hans Wennborg via llvm-dev <llvm-dev at lists.llvm.org>; Release-
> testers
> > > > <release-testers at lists.llvm.org>; flang-dev at lists.llvm.org
> > > > Subject: Re: [llvm-dev] [11.0.0 Release] The release branch is here;
> trunk is
> > > > now 12.0.0
> > > >
> > > > On Wed, Jul 15, 2020 at 2:20 PM Rainer Orth <ro at gcc.gnu.org> wrote:
> > > > >
> > > > > Hi Hans,
> > > > >
> > > > > > The release branch for LLVM 11 was created from the trunk at
> > > > > > 2e10b7a39b930ef8d9c4362509d8835b221fbc0a, and the trunk
> version was
> > > > > > bumped to 12.0.0.
> > > > > [...]
> > > > > > The first release candidate will be tagged soon (hopefully in a day or
> > > > > > two if the branch looks stable), and testing of that can begin. The
> > > > > > full release schedule can be found under "Upcoming Releases" to
> the
> > > > > > right at https://llvm.org
> > > > >
> > > > > I noticed that the test-release.sh script currently lacks support to
> > > > > include flang in the build.  Is this intentional or just an oversight?
> > > >
> > > > It hasn't been added yet since flang wasn't in the tree for the last
> release.
> > > >
> > > > flang-dev folks: what is the current flang status? Should it be added
> > > > to the llvm/utils/release/test-release.sh script so that it gets
> > > > testing and prebuilt binaries as part of the release?
> > > > _______________________________________________
> > > > LLVM Developers mailing list
> > > > llvm-dev at lists.llvm.org
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