Ignore deprecation for items deprecated by the same attribute
Whenever a node would be reported as deprecated:
- check if the parent item is also deprecated
- if it is and both were deprecated by the same attribute
- skip the deprecation warning
fixes#35128closes#16490
r? @eddyb
Whenever a node whould be reported as deprecated:
- check if the parent item is also deprecated
- if it is and both were deprecated by the same attribute
- skip the deprecation warning
fixes#35128closes#16490
[MIR] Deaggregate structs to enable further optimizations
Currently, we generate MIR like:
```
tmp0 = ...;
tmp1 = ...;
tmp3 = Foo { a: ..., b: ... };
```
This PR implements "deaggregation," i.e.:
```
tmp3.0 = ...
tmp3.1 = ...
```
Currently, the code only deaggregates structs, not enums. My understanding is that we do not have MIR to set the discriminant of an enum.
Properly enforce the "patterns aren't allowed in foreign functions" rule
Cases like `arg @ PATTERN` or `mut arg` were missing.
Apply the same rule to function pointer types.
Closes https://github.com/rust-lang/rust/issues/35203
[breaking-change], no breakage in sane code is expected though
r? @nikomatsakis
This is somewhat related to https://github.com/rust-lang/rfcs/pull/1685 (cc @matklad).
The goal is to eventually support full pattern syntax where it makes sense (function body may present) and to support *only* the following forms - `TYPE`, `ident: TYPE`, `_: TYPE` - where patterns don't make sense (function body doesn't present), i.e. in foreign functions and function pointer types.
Support removed LLVM intrinsics by invoking its AutoUpgrade mechanism.
Turns out that LLVM sometimes renames platform intrinsics or replaces them with first-class instructions.
For example, signed minimum became `select (icmp SLT, a, b), a, b` where `a` and `b` are vectors.
This is blocking the Servo rustup ([relevant failure](http://build.servo.org/builders/windows-dev/builds/226/steps/compile/logs/stdio)), as they're using a few such intrinsics.
The fix in this PR is to invoke LLVM's own `AutoUpgrade` mechanism to do the replacements.
