Add meeting notes for June 27 Cranelift meeting (#4329)

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

@@ -13,8 +13,51 @@
 1. Other agenda items
     1. _Submit a PR to add your item here_
 
-## Notes
-
 ### 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)