tree cf4651ad03aeb185d118e5e2ff6870a6461303b9
parent b9a80daac265e1a9a36747bbe971d1f3d085d370
parent 7948e960e9663d107b2210db7a7b3d8b4d813e0b
author bors <bors@rust-lang.org> 1754417421 +0000
committer bors <bors@rust-lang.org> 1754417421 +0000

Auto merge of #144863 - cjgillot:live-or-dead, r=Urgau

Simplify dead code lint

This PR scratches a few itches I had when looking at that code.

The perf improvement comes from keeping the `scanned` set through several marking phases. This pretty much divides by 2 the number of HIR traversals.