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bors d914f17ca7 Auto merge of #90919 - nnethercote:rm-DropArena, r=Mark-Simulacrum 
Remove `DropArena`.

Most arena-allocate types that impl `Drop` get their own `TypedArena`, but a
few infrequently used ones share a `DropArena`. This sharing adds complexity
but doesn't help performance or memory usage. Perhaps it was more effective in
the past prior to some other improvements to arenas.

This commit removes `DropArena` and the sharing of arenas via the `few`
attribute of the `arena_types` macro. This change removes over 100 lines of
code and nine uses of `unsafe` (one of which affects the parallel compiler) and
makes the remaining code easier to read.
2021-11-16 11:48:37 +00:00
..
benches mv compiler to compiler/ 2020-08-30 18:45:07 +03:00
src Auto merge of #90919 - nnethercote:rm-DropArena, r=Mark-Simulacrum 2021-11-16 11:48:37 +00:00
Cargo.toml Store lowering outputs per owner. 2021-10-09 11:56:29 +02:00
README.md mv compiler to compiler/ 2020-08-30 18:45:07 +03:00

README.md

For more information about how rustc works, see the rustc dev guide.