This was a relic from when we had "nominal flags" and "cached
properties." The latter no longer exists, so nominal flags are no
longer necessary. In fact, every flag is considered a nominal flag. I
went ahead and removed all references to NOMINAL_FLAGS.
Fixes rust-lang#70836
The iterators are now "fused" with `Option` so we don't need separate
state to track which part is already exhausted, and we may also get
niche layout for `None`. We don't use the real `Fuse` adapter because
its specialization for `FusedIterator` unconditionally descends into the
iterator, and that could be expensive to keep revisiting stuff like
nested chains. It also hurts compiler performance to add more iterator
layers to `Chain`.
Don't import integer and float modules, use assoc consts 2
Follow up to #70777. I missed quite a lot of places. Partially because I wanted to keep the size of the last PR down, and partially because my regexes were not good enough :)
r? @dtolnay
Keep codegen units unmerged when building compiler builtins
Make it possible to control how mono items are partitioned into code generation
units, when compiling the compiler builtins, by retaining the original partitioning.
Helps with #48625, #61063, #67960, #70489.
r? @alexcrichton
Miri leak check: memory reachable through globals is not leaked
Also make Miri memory dump prettier by sharing more code with MIR dumping, and fix a bug where the Miri memory dump would print some allocations twice.
r? @oli-obk
Miri PR: https://github.com/rust-lang/miri/pull/1301
Small tweaks in ToOwned::clone_into
- `<[T]>::clone_into` is slightly more optimized.
- `CStr::clone_into` is new, letting it reuse its allocation.
- `OsStr::clone_into` now forwards to the underlying slice/`Vec`.
Speed up path searching with `find_library_crate`.
By doing prefix and suffix checking on a `String` copy of each relevant
`PathBuf`, rather than the `PathBuf` itself.
ty/walk: iterate `GenericArg`s instead of `Ty`s.
Before this PR, `Ty::walk` only iterated over `Ty`s, but that's becoming an increasing problem with `const` generics, as `ty::Const`s in `Substs` are missed by it.
By working with `GenericArg` instead, we can handle both `Ty`s and `ty::Const`s, but also `ty::Region`s, which used to require ad-hoc mechanisms such as `push_regions`.
I've also removed `TraitRef::input_types`, as it's both long obsolete, and easy to misuse.
