Flang Biweekly Sync - Notes from the January 22nd, 2020 call

Subprojects Flang
1

Flang team,

Here are the notes from the January 22nd, 2020 Flang biweekly call.

The next Flang Technical Community call is scheduled for Monday, January 27th, 8:30 AM Pacific Time. Discussion will probably center on the necessary work to upload flang to the LLVM monorepo.

The next Flang biweekly call will be Wednesday, February 5th, 2020 at 8:30 AM Pacific Time. Note that this is the week of the ECP Annual Meeting.

Logistics information for these calls is at the end of this email.

Thank you.

Gary Klimowicz

Agenda

  • ECP Annual Meeting Feb 3-7
  • Continue discussing merging process and status
  • F18 development update
  • Flang development update

Highlights

  • ECP Annual Meeting February 3-7, 2020, Houston Texas

  • The Compiler Will Help You! The LLVM Compiler Infrastructure in ECP, Thursday Feb 6, 2020, 1:30 PM - 3:00 PM

  • A Flang poster (Alexis Perry-Holby and Flang team) has been created.

  • Pat McCormick would like to arrange a get-together for people working on Flang at the annual meeting. He’s working on arranging a space or this. Let Pat know if you will be attending the ECP Annual meeting.

  • Flang Community Technical Biweekly Call

  • The next call is scheduled for Monday, January 27th. Discussion about the process for uploading Flang to the LLVM monorepo will likely continue.

  • Craig Rasmussen mentioned that he would be interested in talking about experience with flang for a rewriting scheme that they are working on. (It sounds like this might be related to a source-to-source implementation for coarrays, which Craig and Kate Rasmussen are working on.)

  • New Flang update

  • We continue to work through expectations and issues regarding flang’s readiness to be pulled into the LLVM monorepo. Arm is taking the lead on ensuring that we have a set of work items defined for what must be done before the upload, and what can be addressed afterwards.

  • Most of the requests are not complicated: file suffix changes (.cpp instead of .cc); braces around single statements; incorporating tests into lit (the LLVM Integrated Testing framework) from ctest; etc.

  • Other requests include things like greater use of LLVM data structures and file handling.

  • See the detailed notes below for other Flang development updates.

  • Original Flang Dev news and updates

  • We will be providing access for additional committers to the project. There was discussion today around this process. Arm has submitted a list of additional committers for current Flang. We discussed setting up more public buildbots for Power (IBM will be looking into that) and x86.

  • Each team will continue to test their proposed changes internally using their internal test infrastructure.

  • This should help with the queue of pull requests that are outstanding for Flang.

  • NVIDIA will continue to push fixes for GitHub issues to flang.

Where we can use your help

  • Topics for the biweekly calls and technical community calls.
  • Let us know if you have presentations or meetings relevant to the Flang community. We will publicize these in these notes.

**Details (**Updates below are in bold)