2019-08-29

Volunteers wanted

• We’ve had a few issues recently related to upgrading LLVM. We’d like to create a new working group which will focus on fixing ICEs and miscompilations caused by LLVM.

Backport nominations

• Account for doc comments coming from proc macros without spans #63930

  • Accepted for beta backport

• fix nounwind attribute logic #63909

  • Declined for beta backport

• Fix nested eager expansions in arguments of format_args #63717

  • Accepted for beta backport

• Don’t access a static just for its size and alignment #62982

  • Accepted for beta backport

• debuginfo: give unique names to closure and generator types #63875

  • Accepted for beta backport

Working group sync

wg-mir-opt

• @spastorino has gotten Place 2.0 (a reimagining of mir::Place using slices for projections) with only a slight regression in memory usage on one compiler benchmark.

  • They’re currently working on fixing that regression.

• @wesleywiser split promoted items out of mir::Body to prevent cycles in the optimization pipeline.

  • They’re continuing to work on making the const_prop pass more powerful.

Link to full conversation

wg-nll

• A few soundess “fixed-by-nll” issues were closed recently.

• Work is ongoing to stabilize bind-by-move pattern guards.

Link to full conversation

wg-parallel-rustc

• @aturon is doing an audit of related PRs (accepted and pending) with a focus on shared state and lock semantics with multithreaded rustc.

• @aturon is also going to be working on reducing locking and shared mutable state that exists outside the query system.

Link to full conversation