Rollup of 11 pull requests #80439
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Rollup of 11 pull requests #80439
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Complement to rust-lang#78863
This includes bytecodealliance/wasmtime#2403 which enables hotswapping with SimpleJIT
Co-authored-by: Jonas Schievink <jonasschievink@gmail.com> Co-authored-by: Vadim Petrochenkov <vadim.petrochenkov@gmail.com>
Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>
This can happen in generic code
Directly use raw pointers in `AtomicPtr` store/load I was unable to find any reason for this limitation in the latest source of LLVM or in the documentation [here](http://llvm.org/docs/Atomics.html#libcalls-atomic). fixes rust-lang/miri#1574
LICM in Cranelift has been fixed recently
This commit makes minor changes to the cranelift backend so that it can build given changes in cg_ssa for Split DWARF. Signed-off-by: David Wood <david@davidtw.co>
…omatsakis Move binder for dyn to each list item This essentially changes `ty::Binder<&'tcx List<ExistentialTraitRef>>` to `&'tcx List<ty::Binder<ExistentialTraitRef>>`. This is a first step in moving the `dyn Trait` representation closer to Chalk, which we've talked about in `@rust-lang/wg-traits.` r? `@nikomatsakis`
Lazy compilation in jit mode
This should not matter right now, but if we ever parallelize rustbuild this will avoid tarball contents being merged together.
…n_backend, r=oli-obk
Move some more code out of CodegenBackend::{codegen_crate,link}
Kind of a follow up to rust-lang#77795
…Simulacrum Update RELEASES.md for 1.49.0 ### [Rendered](https://github.com/XAMPPRocky/rust/tree/relnotes-1.49.0/RELEASES.md) r? ``@Mark-Simulacrum`` cc ``@rust-lang/release``
…arkor
Suggest fn ptr rather than fn item and suggest to use `Fn` trait bounds rather than the unique closure type in E0121
Previously, using `_` as a return type in a function that returned a function/closure would provide a diagnostic that would cause a papercut. For example:
```rust
fn f() -> i32 { 0 }
fn fn_ptr() -> _ { f }
fn closure() -> _ { || 0 }
```
would result in this diagnostic:
```rust
error[E0121]: the type placeholder `_` is not allowed within types on item signatures
--> <anon>:2:16
|
2 | fn fn_ptr() -> _ { f }
| ^
| |
| not allowed in type signatures
| help: replace with the correct return type: `fn() -> i32 {f}`
error[E0121]: the type placeholder `_` is not allowed within types on item signatures
--> <anon>:3:17
|
3 | fn closure() -> _ { || 0 }
| ^
| |
| not allowed in type signatures
| help: replace with the correct return type: `[closure@<anon>:3:21: 3:25]`
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0121`.
```
As can be seen, it was suggested to use the function definition return type `fn() -> i32 { f }` which is not valid syntax as a return type. Additionally, closures cause a papercut as unique closure types (notated in this case as `[closure@<anon>:3:21: 3:25]`) are not valid syntax either.
Instead, this PR implements this version of the diagnostic (this example is for the same code featured above):
```rust
error[E0121]: the type placeholder `_` is not allowed within types on item signatures
--> <anon>:2:16
|
2 | fn fn_ptr() -> _ { f }
| ^
| |
| not allowed in type signatures
| help: replace with the correct return type: `fn() -> i32`
error[E0121]: the type placeholder `_` is not allowed within types on item signatures
--> <anon>:3:17
|
3 | fn closure() -> _ { || 0 }
| ^ not allowed in type signatures
|
= help: consider using an `Fn`, `FnMut`, or `FnOnce` trait bound
= note: for more information on `Fn` traits and closure types, see https://doc.rust-lang.org/book/ch13-01-closures.html
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0121`.
```
As can be seen in this diagnostic, the papercut for returning a function item is fixed by suggesting the usage of a function pointer as the return type. As for closures, it's suggested to use an `Fn`, `FnMut`, or `FnOnce` trait bound (with further reading on closures and `Fn` traits in *The Book* for beginners). I did not implement a suggestion to use `impl Fn() -> i32` syntax as that was out-of-scope for my abilities at the moment, therefore someone in the future may want to implement that. Also, it's possible to use either `impl Trait` syntax, generics, or generics with a `where` clause, and some users may not want to use `impl Trait` syntax for their own reasons.
This PR fixes rust-lang#80179.
Add more comments to trait queries This also adds back a comment that was mistakenly removed in ac9dfc3.
use matches!() macro in more places
…k-Simulacrum BTreeMap: test split_off (and append) more thoroughly Using DeterministicRng as a poor man's property based testing rig. r? ``@Mark-Simulacrum``
Document rustc_macros on nightly-rustc Fixes rust-lang#80345.   r? ``@ehuss``
Remove FIXME in rustc_privacy rust-lang#71104 has been fixed. r? ``@marmeladema`` if you have time, otherwise ``@petrochenkov``
…jorn3 Sync rustc_codegen_cranelift The highlight of this sync are two JIT mode improvements. The first is that it is now possible to use JIT mode when using `-Zcodegen-backend` instead of the custom driver using `-Cllvm-args=mode=jit`. The second one is a new JIT mode that lazily compiles functions when they are called the first time: https://github.com/bjorn3/rustc_codegen_cranelift/pull/1120 In addition this includes a few small runtime performance improvements and various fixes for rustc changes that didn't cause compilation to fail. r? ``@ghost`` ``@rustbot`` label +A-codegen +A-cranelift +T-compiler
…sper rustc_span: Remove `Symbol::with` A subset of rust-lang#79425 that is a pure refactoring.
…rk-Simulacrum bootstrap: put the component name in the tarball temp dir path This should not matter right now, but if we ever parallelize rustbuild this will avoid tarball contents being merged together. r? `@Mark-Simulacrum`
|
@bors r+ rollup=never p=5 |
|
📌 Commit a4a59a0 has been approved by |
bors
added
the
S-waiting-on-bors
|
☀️ Test successful - checks-actions |
This was referenced Dec 28, 2020
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Successful merges:
Fntrait bounds rather than the unique closure type in E0121 #80284 (Suggest fn ptr rather than fn item and suggest to useFntrait bounds rather than the unique closure type in E0121)Symbol::with#80411 (rustc_span: RemoveSymbol::with)Failed merges:
r? @ghost
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