Perform LTO optimisations with wasm-ld + -Clinker-plugin-lto
Fixes (partially) #60059. Technically, `--target wasm32-unknown-unknown -Clinker-plugin-lto` would complete without errors before, but it was not producing optimized code. At least, it may have been but it was probably not the opt-level people intended.
Similarly to #118377, this could benefit from a warning about using an explicit libLTO path with LLD, which will ignore it and use its internal LLVM. Especially given we always use lld on wasm targets. I left the code open to that possibility rather than making it perfectly neat.
give dev-friendly error message for incorrect config profiles
before this change, an incorrect profile would result in the following error:
```sh
...
...
File "/home/nimda/devspace/onur-ozkan/rust/src/bootstrap/bootstrap.py", line 1088, in bootstrap
with open(include_path) as included_toml:
^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: '/home/nimda/devspace/onur-ozkan/rust/src/bootstrap/defaults/config.aaaa.toml'
```
with this change, the error message is now:
```sh
...
...
File "/home/nimda/devspace/onur-ozkan/rust/src/bootstrap/bootstrap.py", line 1088, in bootstrap
raise Exception("Unrecognized profile '{}'. Check src/bootstrap/defaults"
Exception: Unrecognized profile 'aaaa'. Check src/bootstrap/defaults for available options.
```
unify read_to_end and io::copy impls for reading into a Vec
This ports over the initial probe (to avoid allocation) and the dynamic read sizing from the io::copy specialization to the `default_read_to_end` implementation which already had its own optimizations for different cases.
I think it should be a best-of-both now.
suggested by `@a1phyr` in https://github.com/rust-lang/rust/pull/117576#issuecomment-1803408492
Expand in-place iteration specialization to Flatten, FlatMap and ArrayChunks
This enables the following cases to collect in-place:
```rust
let v = vec![[0u8; 4]; 1024]
let v: Vec<_> = v.into_iter().flatten().collect();
let v: Vec<Option<NonZeroUsize>> = vec![NonZeroUsize::new(0); 1024];
let v: Vec<_> = v.into_iter().flatten().collect();
let v = vec![u8; 4096];
let v: Vec<_> = v.into_iter().array_chunks::<4>().collect();
```
Especially the nicheful-option-flattening should be useful in real code.
Fix comments for unsigned non-zero `checked_add`, `saturating_add`
While looking at #118313, I happened to notice that two of the expanded comments appear to be slightly inaccurate.
For these two methods, `other` is an ordinary unsigned integer, so it can be zero.
Since the sum of non-zero and zero is always non-zero, the safety argument holds even when `other` is zero.
Update mod comment
The comment of `ASCII_CASE_MASK` on line 477 is `If 6th bit is set ascii is lower case.` but the original comment of `*self ^ ((self.is_ascii_lowercase() as u8) * ASCII_CASE_MASK)` was `Toggle the fifth bit if this is a lowercase letter`
effects: Run `enforce_context_effects` for all method calls
So that we also perform checks when overloaded `PartialEq`s are called.
r? `@compiler-errors`
Rollup of 9 pull requests
Successful merges:
- #111133 (Detect Python-like slicing and suggest how to fix)
- #114708 (Allow setting `rla` labels via `rustbot`)
- #117526 (Account for `!` arm in tail `match` expr)
- #118172 (Add `pretty_terminator` to pretty stable-mir)
- #118202 (Added linker_arg(s) Linker trait methods for link-arg to be prefixed "-Wl," for cc-like linker args and not verbatim)
- #118374 (QueryContext: rename try_collect_active_jobs -> collect_active_jobs, change return type from Option<QueryMap> to QueryMap)
- #118381 (rustc_span: Use correct edit distance start length for suggestions)
- #118382 (Address unused tuple struct fields in the compiler)
- #118384 (Address unused tuple struct fields in rustdoc)
r? `@ghost`
`@rustbot` modify labels: rollup
They're identical to the same-named types from `ast`. I find it silly
(and inefficient) to have all this boilerplate code to convert one type
to an identical type.
There is already a small amount of type sharing between the AST and HIR,
e.g. `Attribute`, `MacroDef`.
The commit adds a `pub use` to `rustc_hir` so that, for example,
`ast::BinOp` can also be referred to as `hir::BinOp`. This is so the
many existing `hir`-qualified mentions of these types don't need to
change.
The commit also moves a couple of operations from the (removed) HIR
types to the AST types, e.g. `is_by_value`.
For these two methods, `other` is an ordinary unsigned integer, so it can be zero.
Since the sum of non-zero and zero is always non-zero, the safety argument
holds even when `other` is zero.
rustc_span: Use correct edit distance start length for suggestions
Otherwise the suggestions can be off-base for non-ASCII identifiers. For example suggesting that `Ok` is a name similar to `读文`.
Closes https://github.com/rust-lang/rust/issues/72553.
QueryContext: rename try_collect_active_jobs -> collect_active_jobs, change return type from Option<QueryMap> to QueryMap
As there currently always Some(...) inside.
