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<body lang="EN-US" link="#0563C1" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal">Flang team,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here are the notes from the July 8, 2020 Flang Community biweekly call.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The next Flang Technical Community will be <b>Monday, July 13, 8:30 AM Pacific time.</b><o:p></o:p></p>
<p class="MsoNormal">The next Flang biweekly call<b> </b>will be <b>Wednesday, July 22, 2020 at 8:30 AM Pacific time.<o:p></o:p></b></p>
<p class="MsoNormal">The next Classic Flang Technical biweekly call will be <b>Wednesday, July 15, 2020 at 8:30 AM Pacific time</b>. (This is a new open call for the original Flang.)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Information for joining these calls and the Slack channel is at the end of this email.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Let me know if you have any topics you would like covered in the next call.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thank you.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Gary Klimowicz<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>Agenda</b><o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l0 level1 lfo1">ISC and LLVM Workshop on LLVM Compiler and Tools for HPC (recap)<o:p></o:p></li><li class="MsoNormal" style="mso-list:l0 level1 lfo1">International Fortran Conference (recap)<o:p></o:p></li><li class="MsoNormal" style="mso-list:l0 level1 lfo1">Classic Flang technical biweekly call<o:p></o:p></li><li class="MsoNormal" style="mso-list:l0 level1 lfo1">LLVM Technical Call<o:p></o:p></li><li class="MsoNormal" style="mso-list:l0 level1 lfo1">LLVM Flang development update<o:p></o:p></li><li class="MsoNormal" style="mso-list:l0 level1 lfo1">Classic Flang update<o:p></o:p></li></ul>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<p class="MsoNormal"><b>Highlights</b><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l1 level1 lfo2">LLVM Workshop on Compilers and Tools for HPC at ISC 2020 Digital<o:p></o:p></li><ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="mso-list:l1 level2 lfo2">June 25-26<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">Talks by Kiran Chandramohan (Arm,
<a href="https://hps.vi4io.org/_media/events/2020/llvm-cth20_chandramohan.pdf">OpenMP in MLIR and Flang</a>) and Will Lovett (<a href="https://hps.vi4io.org/_media/events/2020/llvm-cth20_lovett.pdf">ARM Scalable Vector Extension in LLVM</a>)<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">Steve Scalpone (NVIDIA) talk on Compiling Three Generations of Fortran with LLVM (slides to come)<o:p></o:p></li></ul>
</ul>
<p class="MsoNormal"><o:p> </o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l1 level1 lfo2">International Fortran Conference 2020 Digital<o:p></o:p></li><ul style="margin-top:0in" type="circle">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">Steve Lionel keynote (mostly Fortran 2018)<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">Lots of object-oriented Fortran (Arjen Markus’s talk and the Saturday workshop he led with Tiziano Müller and Vladimir Rybkin was very good)<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">Gary talked about Flang. Overall, Flang was well-received<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">Many other talks that were of interest; web site is
<a href="https://tcevents.chem.uzh.ch/event/12/">https://tcevents.chem.uzh.ch/event/12/</a>. Presentations are recorded.<o:p></o:p></li></ul>
</ul>
<p class="MsoNormal"><o:p> </o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l1 level1 lfo2">Classic Flang biweekly call<o:p></o:p></li><ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="mso-list:l1 level2 lfo2">There Classic Flang biweekly call is now open to anyone (especially vendors) who are interested in using and improving Classic Flang.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">The call had been mostly for Classic Flang process and technical issues, hosted by Arm Ltd.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">It occurs at the same time as this call, the weeks this call is not held (Wednesdays, 8:30 AM Pacific time).<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">Details for joining this call have been added to these call notes.<o:p></o:p></li></ul>
</ul>
<p class="MsoNormal"><o:p> </o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l1 level1 lfo2">Flang Community Technical Biweekly Call<o:p></o:p></li><ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="mso-list:l1 level2 lfo2">Next topic: Outstanding reviews. David Truby posted an RFC for LLVM 11; we will probably recap the outcome of this RFC.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">The last call was June 29. Discussed current status of lowering and upstreaming from fir-dev to llvm-project (56% (by volume) complete at the time).<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">Please add both small and large technical topics to the Google Doc for the technical call. The link to the Google Doc can be found in the notes below.<o:p></o:p></li></ul>
</ul>
<p class="MsoNormal"><o:p> </o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l1 level1 lfo2">LLVM Flang updates<o:p></o:p></li><ul style="margin-top:0in" type="circle">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">Hal Finkel is working to identify a regular time every 4 weeks to continue the discussions on LLVM alias analysis. Next meeting information is in the details below.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">Andzrej Warzynski and Carol Concatto continue to work on the flang driver.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">Merged work on external I/O runtime.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">Continued work on ENTRY; subroutines pretty much done, but FUNCTION entries are tricky due to aliasing requirements on the result values.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">Implemented statement function lowering. Started work on internal function lowering.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">Completed work on passing intrinsics as function pointer actual arguments.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">Continued to merge work from the fir-dev fork of Flang into Flang proper, including lowering of I/O statements. About 60% of fir-dev is merged.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">Bug fixing from issues exposed by test suites, particularly FCVS.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">Began implementation of semantics for coarrays (specifying image selectors, NUM_IMAGES intrinsic).<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">Improvements for parsing of OpenMP constructs.<o:p></o:p></li></ul>
</ul>
<p class="MsoNormal"><o:p> </o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l1 level1 lfo2">Original Flang Dev news and updates<o:p></o:p></li><ul style="margin-top:0in" type="circle">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">Kiran Chandramohan pushed PR#875 into Flang. This marks the first change pushed under the new Flang Community Pull Request process.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">We published the RFC to flang-dev on handling the outstanding pull requests for classic Flang. Arm, AMD and NVIDIA (others are welcome!) will be evaluating the pull requests for merge
into the master branch. No significant feedback received on the RFC. Look in flang-dev for subject ‘[classic-flang]’ if you’re interested.<o:p></o:p></li></ul>
</ul>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>Details (</b>Updates below are in <b>bold</b>)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoNormal" style="margin-left:-.25in;mso-list:l5 level1 lfo3"><b>Flang on GitHub</b><o:p></o:p></li></ol>
<p class="MsoNormal" style="margin-left:.5in;text-indent:-.25in;mso-list:l6 level1 lfo4">
<![if !supportLists]><span style="font-size:10.0pt;font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>LLVM Flang is merged with LLVM in <a href="https://github.com/llvm/llvm-project/tree/master/flang">
https://github.com/llvm/llvm-project/tree/master/flang</a>.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in;text-indent:-.25in;mso-list:l6 level1 lfo4">
<![if !supportLists]><span style="font-size:10.0pt;font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>There have been <b>2466</b> commits for LLVM Flang encompassing over
<b>154,000</b> lines of code, documentation, CMakefiles and tests.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in;text-indent:-.25in;mso-list:l6 level1 lfo4">
<![if !supportLists]><span style="font-size:10.0pt;font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>There have been <b>1,677</b> total commits to Classic Flang in github.com/flang-compiler/flang.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in;text-indent:-.25in;mso-list:l6 level1 lfo4">
<![if !supportLists]><span style="font-size:10.0pt;font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>There are <b>534</b> people who have “starred” that flang repo and
<b>80</b> forks.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<ol style="margin-top:0in" start="2" type="1">
<li class="MsoNormal" style="margin-left:-.25in;mso-list:l5 level1 lfo3"><b>Flang Community Technical Call (Hosted by Hal Finkel)</b><o:p></o:p></li></ol>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l3 level1 lfo5"><b>The last call was June 29. Discussion centered on the status of lowering and the merge of the
<i>fir-dev</i> branch into LLVM flang master branch.<o:p></o:p></b></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l3 level1 lfo5"><b>The LLVM alias analysis call is scheduled for Tuesday, July 14<sup>th</sup> 10:00 AM Pacific time (12-1 CDT, 6-7pm London).
</b><a href="https://bluejeans.com/101176001?src=join_info"><b>https://bluejeans.com/101176001?src=join_info</b></a><b>. The agenda document is at
</b><a href="https://docs.google.com/document/d/1ybwEKDVtIbhIhK50qYtwKsL50K-NvB6LfuBsfepBZ9Y/edit?usp=sharing"><b>https://docs.google.com/document/d/1ybwEKDVtIbhIhK50qYtwKsL50K-NvB6LfuBsfepBZ9Y/edit?usp=sharing</b></a><b><o:p></o:p></b></li></ul>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l3 level1 lfo5"><b>The next call will be Monday, July 13, 8:30 AM PT.</b><o:p></o:p></li><ul style="margin-top:0in" type="circle">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l3 level2 lfo5"><b>Outstanding reviews.<o:p></o:p></b></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l3 level2 lfo5"><b>LLVM 11 is coming; there is an RFC from David Truby about what we might do before the branch is made.<o:p></o:p></b></li></ul>
</ul>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l3 level1 lfo5"><b>Future Topics and tentative dates:</b><o:p></o:p></li><ul style="margin-top:0in" type="circle">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l3 level2 lfo5">Build times for the compiler.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l3 level2 lfo5">Please feel free to add agenda topics to the Google Doc:
<a href="https://docs.google.com/document/d/1Z2U5UAtJ-Dag5wlMaLaW1KRmNgENNAYynJqLW2j2AZQ/">
https://docs.google.com/document/d/1Z2U5UAtJ-Dag5wlMaLaW1KRmNgENNAYynJqLW2j2AZQ/</a><o:p></o:p></li></ul>
</ul>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<ol style="margin-top:0in" start="3" type="1">
<li class="MsoNormal" style="margin-left:-.25in;mso-list:l5 level1 lfo3"><b>Flang community</b><o:p></o:p></li></ol>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l3 level1 lfo5"><b>Website:</b> <a href="http://www.flang-compiler.org">
www.flang-compiler.org</a> redirects to <a href="http://github.com/flang-compiler/flang">
http://github.com/flang-compiler/flang</a>.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l3 level1 lfo5"><b>Wiki:</b> <a href="https://github.com/flang-compiler/flang/wiki">
https://github.com/flang-compiler/flang/wiki</a><b> </b>is the Flang wiki page where the most up-to-date build instructions and news can be found.<o:p></o:p></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l3 level1 lfo5"><b>Issues:</b><o:p></o:p></li><ul style="margin-top:0in" type="circle">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l3 level2 lfo5">Bug reports for LLVM flang should be reported in Bugzilla:
<a href="https://bugs.llvm.org/">https://bugs.llvm.org/</a>. Use the “flang” tag for flang-related issues, please.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l3 level2 lfo5">Bug reports for current Flang can be reported to
<a href="https://github.com/flang-compiler/flang/issues">https://github.com/flang-compiler/flang/issues</a>.<o:p></o:p></li></ul>
</ul>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l3 level1 lfo5"><b>LLVM mailing lists:</b> There are now two mailing lists hosted by llvm.org:<o:p></o:p></li><ul style="margin-top:0in" type="circle">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l3 level2 lfo5">The flang-dev mailing list has been set up. Subscribe at
<a href="https://lists.llvm.org/cgi-bin/mailman/listinfo/flang-dev">https://lists.llvm.org/cgi-bin/mailman/listinfo/flang-dev</a>. These biweekly notes are now sent to this email list.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l3 level2 lfo5">The flang-commits mailing list has been set up. Subscribe at
<a href="https://lists.llvm.org/cgi-bin/mailman/listinfo/flang-commits">https://lists.llvm.org/cgi-bin/mailman/listinfo/flang-commits</a>.<o:p></o:p></li></ul>
</ul>
<p class="MsoNormal"><o:p> </o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l3 level1 lfo5"><b>Slack: </b><a href="flang-compiler.slack.com">flang-compiler.slack.com
</a>is used for informal real-time communication in the Flang community. The invitation link can be found at the end of this email.<o:p></o:p></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l1 level1 lfo2"><b>LLVM Workshop on Compilers and Tools for HPC at ISC 2020 Digital<o:p></o:p></b></li><ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="mso-list:l1 level2 lfo2">This was held June 25-26.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">Talks by Kiran Chandramohan (Arm,
<a href="https://hps.vi4io.org/_media/events/2020/llvm-cth20_chandramohan.pdf">OpenMP in MLIR and Flang</a>) and Will Lovett (<a href="https://hps.vi4io.org/_media/events/2020/llvm-cth20_lovett.pdf">ARM Scalable Vector Extension in LLVM</a>)<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">Steve Scalpone (NVIDIA) talk on Compiling Three Generations of Fortran with LLVM (flang/f18). This talk mostly focused on FIR code generation examples with a long example derived from Rajan Walia’s work
to convert FIR to the MLIR affine dialect so that loops in a Fortran array expression would be fused by existing MLIR optimizations.<o:p></o:p></li></ul>
</ul>
<p class="MsoNormal"><o:p> </o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l3 level1 lfo5"><b>International Fortran Conference</b><o:p></o:p></li><ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="mso-list:l3 level2 lfo5">FortranCon 2020 was the first International Conference targeting the development for and with the Fortran programming language and took place on July 2 - 4 in Zurich, Switzerland.<b>
</b>The web site is <a href="https://tcevents.chem.uzh.ch/event/12/">https://tcevents.chem.uzh.ch/event/12/</a>.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l3 level2 lfo5">Gary Klimowicz (Flang) Thursday July 2, 9:20 AM PT.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l3 level2 lfo5">Ondřej Čertík (LFortran) Thursday July 2, 9:50 AM PT.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l3 level2 lfo5">Some interesting talks on object-oriented programming in Fortran, interfacing Fortran to other languages, and applications.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l3 level2 lfo5">Lots of people interested in modern Fortran, and promoting its use. About 250 people registered, and there were 100-150 attendees at most sessions.<o:p></o:p></li></ul>
</ul>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<ol style="margin-top:0in" start="4" type="1">
<li class="MsoNormal" style="margin-left:-.25in;mso-list:l5 level1 lfo3"><b>What we’re up to with the llvm-project/flang Fortran 2018 compiler</b><o:p></o:p></li></ol>
<ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="margin-left:.5in;mso-list:l4 level1 lfo6"><b>On GitHub:
</b>The source code LLVM Flang is available on <a href="https://github.com/llvm/llvm-project/tree/master/flang">
https://github.com/llvm/llvm-project/tree/master/flang</a>. It’s recommended to start in the “documentation” directory.<o:p></o:p></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
<ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="margin-left:.5in;mso-list:l4 level1 lfo6"><b>Public plan:
</b>The team maintains a plan for upcoming Flang work at <a href="https://github.com/orgs/flang-compiler/projects/">
https://github.com/orgs/flang-compiler/projects/</a>.<b> </b>This reflects current LLVM Flang priorities and context for the project and its long-term goals.<o:p></o:p></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
<ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="margin-left:.5in;mso-list:l4 level1 lfo6"><b>Status:
</b>We continue development. Recent work includes:<o:p></o:p></li></ul>
<ul style="margin-top:0in" type="disc">
<ul style="margin-top:0in" type="circle">
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level3 lfo2">We had a good call last month on alias analysis in LLVM. Notes from the last call are available at
<a href="https://docs.google.com/document/d/1ybwEKDVtIbhIhK50qYtwKsL50K-NvB6LfuBsfepBZ9Y/">
https://docs.google.com/document/d/1ybwEKDVtIbhIhK50qYtwKsL50K-NvB6LfuBsfepBZ9Y/</a>. Hal Finkel is working to identify a regular time every 4 weeks to continue the discussions. He has a Doodle poll at
<a href="https://doodle.com/poll/9iqfaqttvvic5rfp">https://doodle.com/poll/9iqfaqttvvic5rfp</a> to try to find the right time for this next meeting.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">Arm buildbots are set up at
<a href="http://lab.llvm.org:8011/builders/flang-aarch64-ubuntu">http://lab.llvm.org:8011/builders/flang-aarch64-ubuntu</a> (GCC 9.3) and
<a href="http://lab.llvm.org:8011/builders/flang-aarch64-ubuntu-clang">http://lab.llvm.org:8011/builders/flang-aarch64-ubuntu-clang</a> (Clang 8).<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">NERSC, LANL and Argonne National Lab are working to set up buildbots as well. NERSC buildbot is running, but failing; Brian Friesen is working through the issues. Argonne is working with ECP and security
resources to negotiate whether they can set up their buildbot. LANL is facing the same uphill battle.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">Andzrej Warzynski and Carol Concatto continue to work on the flang driver.<b><o:p></o:p></b></li></ul>
</ul>
</ul>
<ul style="margin-top:0in" type="disc">
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="mso-list:l2 level2 lfo7">Continued work on ENTRY; subroutines pretty much done, but FUNCTION entries are tricky due to aliasing requirements on the result values.<o:p></o:p></li><li class="MsoListParagraph" style="mso-list:l2 level2 lfo7">Work continued on external I/O runtime.<o:p></o:p></li><li class="MsoListParagraph" style="mso-list:l2 level2 lfo7">Implemented statement function lowering. Started work on internal function lowering.<o:p></o:p></li><li class="MsoListParagraph" style="mso-list:l2 level2 lfo7">Completed work on passing intrinsics as function pointer actual arguments.<o:p></o:p></li><li class="MsoListParagraph" style="mso-list:l2 level2 lfo7">Continued to merge work from the
<i>fir-dev</i> fork of Flang into Flang proper, including lowering of I/O statements. About 60% of
<i>fir-dev</i> is merged.<o:p></o:p></li><li class="MsoListParagraph" style="mso-list:l2 level2 lfo7">Bug fixing from issues exposed by test suites, particularly FCVS.<o:p></o:p></li><li class="MsoListParagraph" style="mso-list:l2 level2 lfo7">Began implementation of semantics for coarrays (specifying image selectors, NUM_IMAGES intrinsic).<o:p></o:p></li><li class="MsoListParagraph" style="mso-list:l2 level2 lfo7">Improvements for parsing of OpenMP constructs.<o:p></o:p></li></ul>
</ul>
<p class="MsoListParagraph" style="margin-left:0in"><b><o:p> </o:p></b></p>
<p class="MsoListParagraph" style="margin-left:0in"><b><o:p> </o:p></b></p>
<ol style="margin-top:0in" start="5" type="1">
<li class="MsoListParagraph" style="margin-left:-.25in;mso-list:l5 level1 lfo3"><b>What we’re up to with current Flang</b><o:p></o:p></li></ol>
<ul style="margin-top:0in" type="disc">
<ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="mso-list:l1 level2 lfo2">We sent an RFC to flang-dev on the handling of pull requests for merge into Flang. This will involve multiple parties contributing to the testing effort for the pull requests. Only one response (off-list)
received. The process was adjusted to make it easier to work on multiple pull requests simultaneously. Look in flang-dev email for the subject ‘[classic-flang]’ if you’re interested in commenting.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">We use the Slack channel #classic-flang-pull-requests to coordinate what pull requests we are working on.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">Recent fixes pushed to Flang master<o:p></o:p></li><ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l1 level3 lfo2"><a href="https://github.com/flang-compiler/flang/pull/875">#875</a> Spelling fixes (a simple change)<o:p></o:p></li></ul>
</ul>
</ul>
<ul style="margin-top:0in" type="disc">
<ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="mso-list:l3 level2 lfo5">Outstanding pull requests: <a href="https://github.com/flang-compiler/flang/pulls">
https://github.com/flang-compiler/flang/pulls</a> for the current list of pull requests.<o:p></o:p></li></ul>
</ul>
<ul style="margin-top:0in" type="disc">
<ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="mso-list:l1 level2 lfo2">Outstanding issues: Please refer to the Issues section on GitHub for
<a href="https://github.com/flang-compiler/flang/issues"><span style="color:#0070C0">flang-compiler/flang</span></a> and
<a href="https://github.com/flang-compiler/clang/issues"><span style="color:#0070C0">flang-compiler/flang-driver</span></a>.<o:p></o:p></li></ul>
</ul>
<p class="MsoNormal"><o:p> </o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l7 level1 lfo8"><b>OpenMP 4.5 support:</b><o:p></o:p></li></ul>
<p class="MsoNormal" style="margin-left:1.0in;text-indent:-.25in;mso-list:l8 level2 lfo9">
<![if !supportLists]><span style="font-size:10.0pt;font-family:"Courier New""><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>No update. OpenMP effort is now directed toward LLVM Flang.<b><o:p></o:p></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l7 level1 lfo8"><b>Debug Metadata:</b><o:p></o:p></li><ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="mso-list:l7 level2 lfo8">The outstanding review at <a href="https://reviews.llvm.org/D54114">
https://reviews.llvm.org/D54114</a> [CHARACTER intrinsic data type] is stale and has been canceled. It will be replaced when there is an appropriate update for LLVM Flang.<o:p></o:p></li></ul>
</ul>
<p class="MsoNormal"><o:p> </o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l7 level1 lfo8"><b>Packaging and Binary Releases:</b><o:p></o:p></li></ul>
<ul style="margin-top:0in" type="circle">
<li class="MsoListParagraph" style="mso-list:l8 level1 lfo9">Spack: Spack packages for Flang have been updated. There is also a spack package for f18, based on the flang-compiler/f18 repository.<o:p></o:p></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l7 level1 lfo8"><b>Current Flang Fortran 2008 features<o:p></o:p></b></li></ul>
<p class="MsoNormal" style="margin-left:.75in">Current status of Fortran 2008 features can be found at
<a href="https://github.com/flang-compiler/flang/wiki/Fortran-2008">https://github.com/flang-compiler/flang/wiki/Fortran-2008</a>.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<ol style="margin-top:0in" start="6" type="1">
<li class="MsoListParagraph" style="margin-left:-.25in;mso-list:l5 level1 lfo3"><b>Logistics<o:p></o:p></b></li></ol>
<p class="MsoNormal" style="margin-left:.25in"><b>Flang Community Biweekly Call (this call)</b><o:p></o:p></p>
<ol style="margin-top:0in" start="6" type="1">
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="margin-left:-.25in;mso-list:l5 level2 lfo3">General updates on the Flang project, both LLVM Flang and current Flang.<o:p></o:p></li><li class="MsoNormal" style="margin-left:-.25in;mso-list:l5 level2 lfo3">Biweekly WebEx hosted by NVIDIA (which these notes cover).<o:p></o:p></li><li class="MsoNormal" style="margin-left:-.25in;mso-list:l5 level2 lfo3">The meeting link for this biweekly call is
<a href="https://nvmeet.webex.com/nvmeet/j.php?MTID=mb4edb8c799f69ec2dc0554acc969a162">
https://nvmeet.webex.com/nvmeet/j.php?MTID=mb4edb8c799f69ec2dc0554acc969a162</a>.<o:p></o:p></li></ul>
</ol>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in">Note: If you are having difficulty connecting your audio, try using the “Call Me” option on WebEx to connect audio to your telephone.<o:p></o:p></p>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<p class="MsoNormal" style="margin-left:.25in"><b>Flang Slack Channel</b><o:p></o:p></p>
<ol style="margin-top:0in" start="6" type="1">
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="margin-left:-.25in;mso-list:l5 level2 lfo3">There is a Slack channel dedicated to Flang.<o:p></o:p></li><li class="MsoNormal" style="margin-left:-.25in;mso-list:l5 level2 lfo3">Add yourself via the invitation link
<a href="https://join.slack.com/t/flang-compiler/shared_invite/zt-2pcn51lh-VrRQL_YUOkxA_1CEfMGQhw">
https://join.slack.com/t/flang-compiler/shared_invite/zt-2pcn51lh-VrRQL_YUOkxA_1CEfMGQhw</a><o:p></o:p></li></ul>
</ol>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<p class="MsoNormal" style="margin-left:.25in"><b>Flang Community Technical Biweekly Call</b><o:p></o:p></p>
<ol style="margin-top:0in" start="6" type="1">
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="margin-left:-.25in;mso-list:l5 level2 lfo3">Technical topics call.<o:p></o:p></li><li class="MsoNormal" style="margin-left:-.25in;mso-list:l5 level2 lfo3">Hal Finkel hosts this call on
<a href="https://bluejeans.com/625064848">Bluejeans</a>, Mondays 8:30 Pacific Time, on the weeks alternating with regular Flang biweekly call. The notes for all these calls can be found in Google Docs
<a href="https://docs.google.com/document/d/1Z2U5UAtJ-Dag5wlMaLaW1KRmNgENNAYynJqLW2j2AZQ/">
here</a>.<o:p></o:p></li></ul>
</ol>
<p class="MsoNormal" style="margin-left:.75in">Meeting URL: <a href="https://bluejeans.com/625064848?src=join_info">
https://bluejeans.com/625064848?src=join_info</a><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.75in">Meeting ID: 625 064 848<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.75in">Want to dial in from a phone? Dial one of the following numbers:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in">+1.408.317.9254 (US (San Jose))<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in">+1.866.226.4650 (US Toll Free)<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in">(see all numbers - <a href="https://www.bluejeans.com/premium-numbers">
https://www.bluejeans.com/premium-numbers</a>)<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in">Enter the meeting ID and passcode followed by #<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.75in">Connecting from a room system?<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in">Dial: bjn.vc or 199.48.152.152 and enter your meeting ID & passcode<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.25in"><b>Classic Flang Biweekly Technical Call<o:p></o:p></b></p>
<p class="MsoNormal" style="margin-left:.75in">This is the sync call for people working with the original Flang project. The call happens every other Wednesday in the same week as the LLVM Flang Technical call (alternate week with the Flang Community Biweekly
call).<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.75in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.75in">The agenda is available here: <a href="https://docs.google.com/document/d/1-OuiKx4d7O6eLEJDBDKSRnSiUO2rgRR-c2Ga4AkrzOI">
https://docs.google.com/document/d/1-OuiKx4d7O6eLEJDBDKSRnSiUO2rgRR-c2Ga4AkrzOI</a>.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.75in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.75in">Join the Microsoft Teams Meeting at
<a href="https://teams.microsoft.com/l/meetup-join/19%3ameeting_YjM5YjlmNGEtMjA0MS00MTRlLTg5ZjUtOTM1ZGIxOTU2NWQy%40thread.v2/0?context=%7b%22Tid%22%3a%22f34e5979-57d9-4aaa-ad4d-b122a662184d%22%2c%22Oid%22%3a%223641875c-ef5b-4767-8105-0787a195852f%22%7d">
https://teams.microsoft.com/l/meetup-join/19%3ameeting_YjM5YjlmNGEtMjA0MS00MTRlLTg5ZjUtOTM1ZGIxOTU2NWQy%40thread.v2</a><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.75in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.75in">+442033215213 (Toll)<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.75in">Conference ID: 349 328 047#<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.75in"><a href="https://dialin.teams.microsoft.com/7bdb65cd-97d0-44fe-bc03-bf8072eadc33?id=349328047">Local numbers
</a><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.75in">Join with a video conferencing device<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.75in"><a href="mailto:784150312@t.plcm.vc">784150312@t.plcm.vc</a> VTC Conference ID: 1220440737<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
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