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wasmtime/meetings/cranelift/2022/cranelift-06-27.md

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June 27 project call

See the instructions for details on how to attend

Agenda

  1. Opening, welcome and roll call
    1. Note: meeting notes linked in the invite.
    2. Please help add your name to the meeting notes.
    3. Please help take notes.
    4. Thanks!
  2. Announcements
    1. Submit a PR to add your announcement here
  3. Other agenda items
    1. Submit a PR to add your item here

Attendees

  • abrown
  • cfallin
  • fitzgen
  • afonso360
  • akirilov-arm
  • bjorn3
  • Jamey Sharp
  • jlbirch6740
  • uweigand

Notes

No published agenda, proceeding to status updates:

fitzgen: have been looking into stack walking; will eventually look into unwinding as a part of exception handling; sync up with bjorn3 to row in the same direction

afonso360: (welcome back!) have continued work on Cranelift interpreter, starting to figure out ISLE, posted several aarch64 patches

uweigand: out on vacation, upstreamed some changes to QEMU to fix breakage with Wasmtime in v7.0 (fix is in 7.1); also, merging a change to add a "build Wasmtime regression test" to QEMU's CI; planning on moving to vector registers/instructions in s390x backend

bjorn3: no updates

Jamey Sharp: listening in, no updates

akirilov: CFI final version is up for review--feedback needed; started porting splat to ISLE for aarch64

abrown: some sightglass investigation with Yury (performance analysis Chris might be interested in); continued shared memory changes in Wasmtime

jlbirch6740: discussed benchmarking infrastructure for CI with fitzgen and abrown, still need to publish PR; submitted a PR to fix a profiling flag in the C API

cfallin: out sick, investigated performance problem re: splitting in regalloc2 brought by alexcrichton, want to review and merge before next release; also is investigating a regalloc2 checker violation reported by bjorn3 re: pinned vregs (high priority fix!); eventual plan would be to kill pinned vregs and use operands with constraints instead; finishing up e-graphs RFC (will post an initial PR soon)