79a2676ce0
Shrink `LiveNode`. `Liveness::users` is a vector that is occasionally enormous. For example, doing a "clean incremental" check build of `inflate`, there is one instance that represents 5,499 live nodes and 1087 vars, which requires 5,977,413 entries. At 24 bytes per entry, that is 143MB. This patch changes LiveNode from a usize to a u32. On 64-bit machines that halves the size of these entries, significantly reducing peak memory usage and memory traffic, and speeding up "clean incremental" builds of `inflate` by about 10%.
This directory contains the source code of the rust project, including:
rustcand its testslibstd- Various submodules for tools, like rustdoc, rls, etc.
For more information on how various parts of the compiler work, see the rustc guide.
Their is also useful content in the following READMEs, which are gradually being moved over to the guide:
- https://github.com/rust-lang/rust/tree/master/src/librustc/ty/maps
- https://github.com/rust-lang/rust/tree/master/src/librustc/dep_graph
- https://github.com/rust-lang/rust/blob/master/src/librustc/infer/region_constraints
- https://github.com/rust-lang/rust/tree/master/src/librustc/infer/higher_ranked
- https://github.com/rust-lang/rust/tree/master/src/librustc/infer/lexical_region_resolve