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<body lang="EN-US" link="#0563C1" vlink="#954F72">
<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 August 21<sup>st</sup>, 2019 Flang biweekly call. Updates are in
<b>bold</b>.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Please be sure to let us know if you have any questions and agenda topics for the next call.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">The next Flang biweekly call<b> </b>will be <b>September 4<sup>th</sup>, 2019 at 8:30 AM Pacific Time</b>.<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">Flang Community Technical Call – Recap and next topic: Array descriptors probably<o:p></o:p></li><li class="MsoNormal" style="mso-list:l0 level1 lfo1">Fortran Standards Committee update<o:p></o:p></li><li class="MsoNormal" style="mso-list:l0 level1 lfo1">F18 development update<o:p></o:p></li><li class="MsoNormal" style="mso-list:l0 level1 lfo1">Flang development update<o:p></o:p></li></ul>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></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">Supercomputing 2019<o:p></o:p></li><ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="mso-list:l1 level2 lfo2">Hal submitted for an LLVM BoF session at SC 2019.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">There won’t be an LLVM in HPC Workshop this year.<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">Fortran Standards Committee<o:p></o:p></li><ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="mso-list:l1 level2 lfo2">WG5/PL22.3 meeting (J3 #219) held in Tokyo the week of August 5<sup>th</sup>.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">Goal was to set the work item agenda for Fortran 202X.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">Desire is to have a small update to the standard.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">Items include standardizing behavior that is already implemented across most compilers; enhancing rank-agnostic programming; improvements and cleanup items for I/O; reductions in DO CONCURRENT.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">Larger items (generic programming especially) will continue to be investigated, but were considered too large or ill-defined for inclusion in F202X. This may result in a plan for F202Y (not F203X).<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">See meeting notes and documents at
<a href="https://j3-fortran.org/">https://j3-fortran.org/</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: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">Hal Finkel is hosting this call on
<a href="https://bluejeans.com/625064848">Bluejeans</a>, Wednesdays 8:30 Pacific Time, the weeks alternating with this 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><li class="MsoNormal" style="mso-list:l1 level2 lfo2">The August 14<sup>th</sup> call, Robyn Sampson of Intel presented on aliasing information and LLVM enhancements.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">The next call is scheduled for August 28<sup>th</sup>, 8:30 AM PDT. The scheduled agenda topic is array descriptors.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">Hal has a Doodle poll for potentially changing the time of this call:
<a href="https://doodle.com/poll/66m8mvavg7ag2t49">https://doodle.com/poll/66m8mvavg7ag2t49</a>. The current front-runner is Tuesday, 9:00 AM Pacific time. Please make your preferences known via this link.<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">F18 as an LLVM project<o:p></o:p></li><ul style="margin-top:0in" type="circle">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">The LLVM-hosted 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>.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">We will continue to support the original
<a href="mailto:flang-dev@lists.flang-compiler.org">flang-dev@lists.flang-compiler.org</a> and
<a href="mailto:flang-sync@lists.flang-compiler.org">flang-sync@lists.flang-compiler.org</a> and through August 2019. Further emails will be sent only to the LLVM lists.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">Plan is still to upload documentation for F18 before the code, to help establish the project goals and design strategy before uploading the code. This should help establish context
for the project. Steve has email to the administrators to get the initial phabricator top-level directory created.<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">F18 update<o:p></o:p></li><ul style="margin-top:0in" type="circle">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">Merged pull request for BLOCK from Arm.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">Added more complete array spec checks.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">Implemented a deferred analysis of pointer initializers and other constructs so that forward references can appear in more contexts.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">Implemented folding of DIGITS and SIGN intrinsics.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">Fixed issues with nested IMPLICIT.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">Submitted proposal to LLVM conference for talk on Fortran and MLIR. Coordinating with Google.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">Two pull requests to MLIR to help support Fortran Intermediate Representation have been merged.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">More work on DO loop semantics and constraint checking, including DO CONCURRENT locality specifications. Additional tests for semantic checks added.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level2 lfo2">More work on OpenMP directive parsing and semantic checks, including Declare directives, block constructs, standalone directives, sections, atomic and critical 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">Flang Dev news and updates<o:p></o:p></li><ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="mso-list:l1 level2 lfo2">More bug fixes in queue to send to Flang.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">Improved build support for Windows and Mac coming.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">Microsoft is investigating contributing to Flang.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">Work continues on the BLOCK construct.<o:p></o:p></li></ul>
</ul>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><b>Where we can use your help</b><o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l1 level1 lfo2"><b>Respond to Hal’s Doodle poll for the meeting time for the biweekly Flang Technical Community call.</b><o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level1 lfo2"><b>Subscribe to the new LLVM Flang email list:
</b><a href="https://lists.llvm.org/cgi-bin/mailman/listinfo/flang-dev"><b>https://lists.llvm.org/cgi-bin/mailman/listinfo/flang-dev</b></a><b>. We will be cross-posting to both flang-dev mailing lists until September.</b><o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level1 lfo2">Topics for the next biweekly community call and technical community call.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level1 lfo2">Let us know if you have presentations or meetings relevant to the Flang community. We will publicize them in these notes.<o:p></o:p></li></ul>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><b>Details</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:l6 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:l7 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>1,483</b> total commits (<b>1,483
</b>in the previous update).<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in;text-indent:-.25in;mso-list:l7 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>473</b> people who have “starred” the flang repo and
<b>69</b> forks.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in;text-indent:-.25in;mso-list:l7 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]><b>173 </b>people are following f18 in <b>22</b> forks. There have been
<b>2,376 </b>commits.<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:l6 level1 lfo3"><b>Flang Community Technical Call</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">This 30-minute biweekly call is hosted by Hal Finkel at<span class="MsoHyperlink">
</span><a href="https://bluejeans.com/625064848">https://bluejeans.com/625064848</a> on the Wednesdays we do not have this call, at 8:30 AM Pacific time. S<b>ome people have conflicts with this call time. Hal has posted a Doodle poll for potential different
times: </b><a href="https://doodle.com/poll/66m8mvavg7ag2t49"><b>https://doodle.com/poll/66m8mvavg7ag2t49</b></a>.
<b>Tuesday 9:00 AM Pacific time is the leading candidate.</b><o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">Agenda topics and notes from the calls can be found in
<a href="https://docs.google.com/document/d/1Z2U5UAtJ-Dag5wlMaLaW1KRmNgENNAYynJqLW2j2AZQ/edit#heading=h.oiag5i748hyl">
this </a>Google doc. <b>It also contains instructions for joining the meeting.</b><o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">The most recent call was held August 14<sup>th</sup>, 8:30 AM Pacific time. Robyn Sampson of Intel presented on aliasing information and LLVM enhancements.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">The next call is scheduled for August 28<sup>th</sup>. The agenda topic will be array descriptors.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">Future Topics and tentative dates:<o:p></o:p></li><ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l1 level3 lfo2">LLVM transition (mailing lists, git/monorepo, etc.)<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">DWARF (September 11)<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">Module files<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">Tooling development<o:p></o:p></li></ul>
</ul>
</ul>
<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:l6 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><li class="MsoNormal" style="mso-list:l3 level1 lfo5"><b>Issues: </b>Bug reports for 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><li class="MsoNormal" style="mso-list:l3 level1 lfo5"><b>Mailing lists:</b> There are three mailing lists for Flang:
<i>flang-dev, flang-sync</i> and <i>flang-announce</i> at <a href="http://lists.flang-compiler.org/">
http://lists.flang-compiler.org/</a>.<o:p></o:p></li></ul>
<ul style="margin-top:0in" type="disc">
<ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="mso-list:l1 level2 lfo2">You can reach the general Flang community by emailing
<a href="mailto:flang-dev@lists.flang-compiler.org">flang-dev@lists.flang-compiler.org</a>.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">Occasional announcements are sent to
<a href="mailto:flang-announce@lists.flang-compiler.org">flang-announce@lists.flang-compiler.org</a>.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level2 lfo2">These notes will then be sent to
<i>flang-dev </i>and <a href="mailto:flang-sync@lists.flang-compiler.org">flang-sync@lists.flang-compiler.org</a>. You should be able to subscribe and unsubscribe yourself from
<i>flang-sync</i> and <i>flang-dev</i> as you desire.<o:p></o:p></li></ul>
</ul>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l3 level1 lfo5"><b>LLVM mailing lists: There are now two mailing lists hosted by llvm.org. We will be transitioning to using these lists:</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">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 will now be 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><li class="MsoNormal" style="mso-list:l3 level2 lfo5"><b>Please migrate to the LLVM project mailing lists. We will be turning off the </b><a href="mailto:flang-dev@lists.flang-compiler.org"><b>flang-dev@lists.flang-compiler.org</b></a><b> on September 1, 2019.</b><o:p></o:p></li></ul>
<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. Add yourself via the
<a href="https://join.slack.com/t/flang-compiler/shared_invite/enQtMjExOTEyMzQ3MjIxLTZkMDNlODc2YjgxZDY1NTQ2YWJiZWVhOGU2YWY0NDNiOWY0ZjQzNjYyZTNlZjBlNjgxY2U1ZjFjMmY5NzIwMzA">
invite </a>link.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l3 level1 lfo5"><b>Supercomputing 2019</b><o:p></o:p></li><ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="mso-list:l3 level2 lfo5">Hal submitted for an LLVM BoF session at SC 2019.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l3 level2 lfo5">There won’t be a specific LLVM in HPC Workshop this year.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l3 level2 lfo5">There may also be a social event. Nothing specific yet.<o:p></o:p></li></ul>
</ul>
<p class="MsoNormal"> <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="4" type="1">
<li class="MsoNormal" style="margin-left:-.25in;mso-list:l6 level1 lfo3"><b>What we’re up to</b><o:p></o:p></li></ol>
<p class="MsoNormal"> <o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l8 level1 lfo6"><b>F18 Fortran 2018 compiler</b><o:p></o:p></li></ul>
<ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="margin-left:.5in;mso-list:l4 level1 lfo7"><b>On GitHub:
</b>The source code f18 is available on <a href="https://github.com/flang-compiler/f18/">
flang-compiler.github.com/f18</a>. It’s recommended to start in the “documentation” directory.<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l4 level1 lfo7"><b>Status:
</b>We continue development on the new Fortran 2018 front-end. Recent work includes:<o:p></o:p></li></ul>
<ul style="margin-top:0in" type="disc">
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="mso-list:l2 level2 lfo8"><b>Merged pull request for BLOCK from Arm.</b><o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l2 level2 lfo8"><b>Added more complete array spec checks.</b><o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l2 level2 lfo8"><b>Implemented a deferred analysis of pointer initializers and other constructs so that forward references can appear in more contexts.</b><o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l2 level2 lfo8"><b>Implemented folding of DIGITS and SIGN intrinsics.</b><o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l2 level2 lfo8"><b>Fixed issues with nested IMPLICIT.</b><o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l2 level2 lfo8"><b>Submitted proposal to LLVM conference for talk on Fortran and MLIR. Coordinating with Google.</b><o:p></o:p></li><li class="MsoListParagraph" style="mso-list:l2 level2 lfo8"><b>Two pull requests to MLIR to help support Fortran Intermediate Representation have been merged.</b><o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l2 level2 lfo8"><b>More work on DO loop semantics and constraint checking, including DO CONCURRENT locality specifications. Additional tests for semantic checks added.</b><o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l2 level2 lfo8">More work on OpenMP directive parsing and semantic checks,
<b>including Declare directives, block constructs, standalone directives, sections, atomic and critical constructs.</b><o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l2 level2 lfo8">We are close to the point where we will turn on semantic processing by default. This will make it easier for people to check existing codes against f18 and expanding the test suite in f18.<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l2 level2 lfo8">Additional fixes for semantic issues identified by running internal test suites against f18.<o:p></o:p></li></ul>
</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 lfo7"><b>LLVM Project:</b><o:p></o:p></li></ul>
<ul style="margin-top:0in" type="disc">
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="margin-left:.5in;mso-list:l2 level2 lfo8">The flang-dev email list has been set up on llvm.org. You can subscribe here:
<a href="https://lists.llvm.org/cgi-bin/mailman/listinfo/flang-dev">https://lists.llvm.org/cgi-bin/mailman/listinfo/flang-dev</a>. Archives are also available.<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l2 level2 lfo8">The flang-commits email list has also been set up. There is no content yet, as we haven’t migrated to the LLVM monorepo.<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l2 level2 lfo8">The plan is to first upload some of the top-level documentation so the community can read the project goals and strategy before we do a big code dump. This should happen mid-June.<o:p></o:p></li></ul>
</ul>
<p class="MsoNormal"><b> </b><o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l3 level1 lfo5"><b>Recent updates to Flang:</b><o:p></o:p></li></ul>
<p class="MsoNormal" style="margin-left:.5in">Work continues on the Fortran 2008 BLOCK construct.
<b>We are working on appropriate allocations and deallocations at block entry and exit.</b><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><b>Continued work on polymorphic allocatable assignment statements.</b><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><b>Started work on debug metadata for inlined procedures (helpful for profiling).</b><o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="mso-list:l1 level2 lfo2">More PGI bug fixes<o:p></o:p></li><ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level3 lfo2">#719 libpgmath: windows and osx support (as PR#770)<o:p></o:p></li></ul>
</ul>
</ul>
<p class="MsoNormal"> <o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="mso-list:l1 level2 lfo2">Upcoming changes to Flang (in review):<o:p></o:p></li><ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l1 level3 lfo2">More PGI bug fixes<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">F2008 vector NORM2<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">Debug support for Fortran allocatables<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">Pull request #573 – libpgmath: make it clang friendly; addresses bug #557 (reviewing)<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">Pull request #695 – Remove duplicate files<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">Pull request #716 – Make NCAR Kernels tests into longtests<o:p></o:p></li></ul>
</ul>
</ul>
<p class="MsoNormal"> <o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="mso-list:l1 level2 lfo2">Assigned for work:<o:p></o:p></li><ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l1 level3 lfo2">#226 Unlimited polymorphic type does not work with transfer intrinsic<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">#298 norm2 intrinsic<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">#402 Compiler error on regular code<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">#404 Internal compiler error with polymorphic subroutine parameters and nested derived types<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">#426 Failures in #include of OpenMPI's mpif.h<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">#461 OpenMP TeaLeaf_ref: local pointer variable not captured into parallel region<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">#477 Pull request for module variable import debug test<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">#498 Error while compiling libpgmath<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">#512 Flang rejects polymorphic assignment<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">#577 Procedure pointers to internal procedures<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">#602 fd_sincos_scalar.cpp: "error: ‘__builtin_complex’ was not declared in this scope"<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">#604 Flang errors out on a final subroutine with parameterized derived types<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">#608 gdwarf-<version> flag is not honoured<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">#610 No debug generated for namelists<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">#662 Regression : Segfault in taskloop code<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">Pull request #695 runtime: remove duplicate files<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">Pull request #710 Test case for capturing procedure pointers to OpenMP parallel regions<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">Pull request #719 libpgmath: windows and osx support<o:p></o:p></li></ul>
</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>Outstanding pull requests:</b><o:p></o:p></li></ul>
<ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#521 Add OpenBSD as a recognized OS (pending test on new OpenBSD systems internally)<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#529 runtime: PoC: generate call to LLVM intrinsic instead of calling runtime functions when possible; handling NINT for a beginning (proposed expansion of this pull request)<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#530 AArch64: disable test cases invalid on aarch64 (working on)<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#532 runtime: remove duplicate files (need to validate on all compilers)<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#546 Loosen ties to x86 (working on)<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#572 libpgmath: respect LIBPGMATH_WITH_GENERIC setting; fixes #559 (reviewing)<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#592 add support for macOS (awaiting CLA)<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#622 Add explicit braces to avoid dangling else problem (failed NVIDIA testing)<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#642 AArch64: significantly improve formatted input performance by using optimized libc functions on ARM64<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#647 Introduce buffered I/O and replace getc with buffered read<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#655 Add missing signed integer to a pointer conversion in DATA statement<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#658 Fix in preprocessing for Flexi app<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#659 Changes to support transpose intrinsic during initialization<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#660 Enable support for simd directives<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#672 Support isnan() GNU extension (Arm reviewing)<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#689 Fix for segfault in multiple entries OpenMP functions<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#693 runtime: ARM64 is a 64-bit architecture<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#694 libpgmath sanity: do not call sleep() in Linux systems<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#695 runtime: remove duplicate files<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#701 Fix for ICE in taskloop<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#702 Fix for random_seed when seeds have zeroes in LSB<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#710 Test case for capturing procedure pointers to OpenMP parallel regions<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#711 Make the NCAR Kernels tests into longtests<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#717 Support building libpgmath with clang 6<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#723 Support building flang with clang<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#725 Check for gregset_t before using it<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#726 Remove linux references where unneeded<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#737 TRAILZ function added to the fortran compiler (resubmitted)<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#738 Fix for issue #550<o:p></o:p></li><li class="MsoNormal" style="margin-left:.5in;mso-list:l5 level1 lfo9">#742 Implement UNROLL directive<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>Public plan: </b>NVIDIA has published a brief plan for upcoming Flang work on github.io at
<a href="https://github.com/flang-compiler/flang/wiki/Roadmap"><span style="color:windowtext;text-decoration:none">https://github.com/flang-compiler/flang/wiki/Roadmap</span></a>.<b>
</b>This has been recently updated to reflect current Flang and F18 priorities and to provide better 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="disc">
<li class="MsoNormal" style="mso-list:l8 level1 lfo6"><b>Creating pull requests:</b> NVIDIA requires contributor agreements from developers wishing to make pull requests. The Individual CLA is here:
<a href="https://flang-compiler.github.io/files/Flang-ICLA-v4.pdf"><span style="color:windowtext;text-decoration:none">https://flang-compiler.github.io/files/Flang-ICLA-v4.pdf</span></a><span class="MsoHyperlink"><span style="text-decoration:none">.</span></span>
The Corporate CLA is here: <a href="https://flang-compiler.github.io/files/Flang-CCLA-v2.pdf">
https://flang-compiler.github.io/files/Flang-CCLA-v2.pdf</a>. Send completed CLAs to
<a href="mailto:flang-cla@nvidia.com">flang-cla@nvidia.com</a>.<b> </b>Assuming the pull request builds and passes “make check-flang”,<b>
</b>NVIDIA will take on the internal testing of the pull request using the full test suite available internally and provide feedback to the contributor as appropriate. Once we have the quality of the pull request established, it will be incorporated into Flang.<o:p></o:p></li></ul>
<ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="margin-left:.5in;mso-list:l9 level1 lfo10">LLVM is switching to a new Apache license with LLVM exceptions that we need to incorporate into our CLAs after it is adopted by LLVM community. The LLVM license can be found at
<a href="http://llvm.org/foundation/relicensing/LICENSE.txt"><span style="text-decoration:none">http://llvm.org/foundation/relicensing/LICENSE.txt</span></a>. A web page describing the relicensing effort can be found at
<a href="http://llvm.org/foundation/relicensing/"><span style="text-decoration:none">http://llvm.org/foundation/relicensing/</span></a>.<o:p></o:p></li></ul>
<p class="MsoNormal"> <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:l8 level1 lfo6"><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:l9 level2 lfo10">
<![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]>OpenMP 4.5 is supported on multicore CPUs, mapping all target regions across all the cores, with the following known limitations:<o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<ul style="margin-top:0in" type="circle">
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l1 level3 lfo2">We map the directives directly for host==device with very predictable behavior and good performance results.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">Task depend/priority is not supported<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">OMP do clauses linear, order(n), and schedule (modifier) are not supported<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">SIMD construct, Declare SIMD, and SIMD clause: private/reduction/lastprivate/collapse clauses on SIMD construct are supported, SIMD clause/construct are used as a hint to vectorize through metadata generation<o:p></o:p></li><li class="MsoNormal" style="mso-list:l1 level3 lfo2">There is a bug if target construct is enclosed by task construct<o:p></o:p></li></ul>
</ul>
</ul>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in;text-indent:-.25in;mso-list:l9 level2 lfo10">
<![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<o:p></o:p></p>
<p style="margin:0in;margin-bottom:.0001pt"><span style="font-size:12.0pt"> </span><o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l3 level1 lfo5"><b>Outstanding issues:</b><o:p></o:p></li></ul>
<ul style="margin-top:0in" type="disc">
<ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="mso-list:l1 level2 lfo2">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:l8 level1 lfo6"><b>Debug Metadata:</b><o:p></o:p></li><ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="mso-list:l8 level2 lfo6"><b>LLVM Debug metadata changes posted to LLVM Phabricator for review; responding to review comments.</b><o:p></o:p></li><ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l8 level3 lfo6"><a href="https://reviews.llvm.org/D54114"><b>https://reviews.llvm.org/D54114</b></a><b> [CHARACTER intrinsic data type] Review for this is not complete, and we would like to get additional comments or alternate
proposals.</b><o:p></o:p></li></ul>
<li class="MsoNormal" style="mso-list:l8 level2 lfo6">LLVM Debug metadata changes upstreamed to LLVM:<o:p></o:p></li><ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l8 level3 lfo6"><a href="https://reviews.llvm.org/D54043">https://reviews.llvm.org/D54043</a> [ELEMENTAL, PURE and RECURSIVE PROCEDURES]<o:p></o:p></li><li class="MsoNormal" style="mso-list:l8 level3 lfo6"><a href="https://reviews.llvm.org/D54327">https://reviews.llvm.org/D54327</a> [COMMON blocks]<o:p></o:p></li></ul>
</ul>
</ul>
<p class="MsoNormal"> <o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l8 level1 lfo6"><b>Packaging and Binary Releases:</b><o:p></o:p></li></ul>
<ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="margin-left:.5in;mso-list:l9 level1 lfo10"><b>Binary release:</b> We post binary releases at least quarterly. March binary releases of Flang for x86-64 and OpenPOWER (LLVM 7.0) have been posted to
<a href="http://github.com/flang-compiler/flang/releases">http://github.com/flang-compiler/flang/releases</a>.<o:p></o:p></li><li class="MsoListParagraph" style="mso-list:l9 level1 lfo10"><b>Spack:</b> Spack packages for Flang have been reviewed by the Spack team and pulled into Spack for flang_20180921.<b>
</b>We are still working through issues with defining the spack package for flang. Brian Homerding is starting to work on Spack changes for the LLVM and Flang for the LLVM Git monorepo.
<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:l8 level1 lfo6"><b>Testing updates:</b><o:p></o:p></li></ul>
<ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="margin-left:.5in;mso-list:l4 level1 lfo7">NCAR Kernels tests take a long time to execute on some architectures, so we are planning to move them to longtests, based on Arm pull request.<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:l8 level1 lfo6"><b>Application updates:</b><o:p></o:p></li><ul style="margin-top:0in" type="circle">
<li class="MsoNormal" style="mso-list:l8 level2 lfo6">No update.<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="5" type="1">
<li class="MsoNormal" style="margin-left:-.25in;mso-list:l6 level1 lfo3"><b>Fortran 2008 features</b><o:p></o:p></li></ol>
<p class="MsoNormal" style="margin-left:.25in">Some Fortran 2008 features in development for pgfortran will flow into Flang soon.<o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l8 level1 lfo6">Support for the G0 Edit descriptor has been requested by LLNL. Work is complete and is being upstreamed to Flang.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l8 level1 lfo6">BLOCK construct. <b>Work continues on BLOCK. We are running through a battery of tests.</b><o:p></o:p></li><li class="MsoNormal" style="mso-list:l8 level1 lfo6">Pointer default initialization. Work is scheduled to begin in shortly.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l8 level1 lfo6">Allocation of polymorphic variables. Work is scheduled to begin in shortly.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l8 level1 lfo6">EXECUTE_COMMAND_LINE intrinsic. Work is scheduled to begin in shortly.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l8 level1 lfo6">NORM2 intrinsic. Work has completed and is being upstreamed to Flang.<o:p></o:p></li></ul>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.25in">The following items are considered complete. Please report GitHub issues if you identify any problems.<o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l8 level1 lfo6">ERROR STOP<o:p></o:p></li><li class="MsoNormal" style="mso-list:l8 level1 lfo6">Pointers to internal procedures<o:p></o:p></li><li class="MsoNormal" style="mso-list:l8 level1 lfo6">SUBMODULE<o:p></o:p></li><li class="MsoNormal" style="mso-list:l8 level1 lfo6">Serial implementation of F2018 DO CONCURRENT (there is no multi-core implementation planned at this time)<o:p></o:p></li><div>
<li class="MsoNormal" style="mso-list:l8 level1 lfo6">BACK optional argument support for MINLOC/MAXLOC<o:p></o:p></li></div>
</ul>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
</div>
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