Change `Successors` to `impl Iterator<Item = BasicBlock>`
This PR fixes the FIXME in `compiler\rustc_middle\src\mir\mod.rs`.
This can omit several `&`, `*` or `cloned` operations on Successros' generated elements
Allow `unused_macro_rules` in path tests
PR #96150 adds a new lint to warn about unused macro rules (arms/matchers). This causes errors in `library/std/src/path/tests.rs` on the `x86_64-fortanix-unknown-sgx` platform. This PR fixes compilation errors on that platform by allowing unused macro rules.
Add a query for checking whether a function is an intrinsic.
work towards #93145
This will reduce churn when we add more ways to declare intrinsics
r? `@scottmcm`
rustdoc: Remove doc link resolution fallback to all `macro_rules` in the crate
This is a deny-by-default lint detecting such fallback for crater run, as discussed in https://github.com/rust-lang/rust/pull/96521.
Remove potentially misleading realloc parenthetical
This parenthetical is problematic, because it suggests that the following is sound:
```rust
let layout = Layout:🆕:<[u8; 32]>();
let p1 = alloc(layout);
let p2 = realloc(p1, layout, 32);
if p1 == p2 {
p1.write([0; 32]);
dealloc(p1, layout);
} else {
dealloc(p2, layout);
}
```
At the very least, this isn't the case for [ANSI `realloc`](https://en.cppreference.com/w/c/memory/realloc)
> The original pointer `ptr` is invalidated and any access to it is undefined behavior (even if reallocation was in-place).
and [Windows `HeapReAlloc`](https://docs.microsoft.com/en-us/windows/win32/api/heapapi/nf-heapapi-heaprealloc) is unclear at best (`HEAP_REALLOC_IN_PLACE_ONLY`'s description may imply that the old pointer may be used if `HEAP_REALLOC_IN_PLACE_ONLY` is provided).
The conservative position is to just remove the parenthetical.
cc `@rust-lang/wg-unsafe-code-guidelines` `@rust-lang/wg-allocators`
Rename `eq_ignore_case` to `starts_with_ignore_case`
The method doesn't test for equality. It tests if the object starts with
a given byte array, so its name is confusing.
Sync rustc_codegen_cranelift
Since the last sync there have mostly been fixes of various sorts. I also changed cg_clif from using a custom driver to `-Zcodegen-backend` when built as separate project. When built as part of rust it was already using `-Zcodegen-backend`.
r? `@ghost`
`@rustbot` label +A-codegen +A-cranelift +T-compiler
Fix use of SetHandleInformation on UWP
The use of `SetHandleInformation` (introduced in #96441 to make `HANDLE` inheritable) breaks UWP builds because it is not available for UWP targets.
Proposed workaround: duplicate the `HANDLE` with `inherit = true` and immediately close the old one. Traditional Windows Desktop programs are not affected.
cc `@ChrisDenton`
Add rustc_nonnull_optimization_guaranteed to Owned/Borrowed Fd/Socket
PR #94586 added support for using
`rustc_nonnull_optimization_guaranteed` on values where the "null" value
is the all-ones bitpattern.
Now that #94586 has made it to the stage0 compiler, add
`rustc_nonnull_optimization_guaranteed` to `OwnedFd`, `BorrowedFd`,
`OwnedSocket`, and `BorrowedSocket`, since these types all exclude
all-ones bitpatterns.
This allows `Option<OwnedFd>`, `Option<BorrowedFd>`, `Option<OwnedSocket>`,
and `Option<BorrowedSocket>` to be used in FFI declarations, as described
in the [I/O safety RFC].
[I/O safety RFC]: https://github.com/rust-lang/rfcs/blob/master/text/3128-io-safety.md#ownedfd-and-borrowedfdfd-1
