coverage: Prepare for improved branch coverage by Zalathar · Pull Request #124217 · rust-lang/rust (original) (raw)

When trying to rebase my new branch coverage work (including #124154) on top of the introduction of MC/DC coverage (#123409), I found it a lot harder than anticipated. With the benefit of hindsight, the branch coverage code and MC/DC code have become more interdependent than I'm happy with.

This PR therefore disentangles them a bit, so that it will be easier for both areas of code to evolve independently without interference.

This PR also includes a few extra branch coverage tests that I had sitting around from my current branch coverage work. They mostly just demonstrate that certain language constructs listed in #124118 currently don't have branch coverage support.

@rustbot label +A-code-coverage