Const propagate casts
fixes#49760
So... This fixes the original issue about the missing warnings.
But our test suite contains fun things like
```rust
fn foo() {}
assert_eq!(foo as i16, foo as usize as i16);
```
Which, will result in
> a raw memory access tried to access part of a pointer value as raw bytes
on both sides of the assertion. Because well... that's exactly what's going on! We're ripping out 16 bits of a pointer.
Squash all lints tied to foreign macros by default
This PR is a continuation of https://github.com/rust-lang/rust/pull/49755 (thanks for the initial jump-start @Dylan-DPC!) and is targeted at solving https://github.com/rust-lang/rust/issues/48855. This change updates the lint infrastructure to, by default, ignore all lints emitted for code that originates in a foreign macro. For example if `println!("...")` injects some idiomatic warnings these are all ignored by default. The rationale here is that for almost all lints there's no action that can be taken if the code originates from a foreign lint.
Closes#48855Closes#52483Closes#52479
rustc: Stabilize #[wasm_import_module] as #[link(...)]
This commit stabilizes the `#[wasm_import_module]` attribute as
`#[link(wasm_import_module = "...")]`. Tracked by #52090 this new directive in
the `#[link]` attribute is used to configured the module name that the imports
are listed with. The WebAssembly specification indicates two utf-8 names are
associated with all imported items, one for the module the item comes from and
one for the item itself. The item itself is configurable in Rust via its
identifier or `#[link_name = "..."]`, but the module name was previously not
configurable and defaulted to `"env"`. This commit ensures that this is also
configurable.
Closes#52090
overhaul exit codes for rustc and rustdoc
This commit changes the exit status of rustc to 1 in the presence of
compilation errors. In the event of an unexpected panic (ICE) the
standard panic error exit status of 101 remains.
A run-make test is added to ensure that the exit code does not regress,
and compiletest is updated to check for an exit status of 1 or 101,
depending on the mode and suite.
This is a breaking change for custom drivers.
Note that while changes were made to the rustdoc binary, there is no
intended behavior change. rustdoc errors (i.e., failed lints) will still
report 101. While this could *also* hide potential ICEs, I will leave
that work to a future PR.
Fixes#51971.
Rollup of 13 pull requests
Successful merges:
- #51628 (use checked write in `LineWriter` example)
- #52116 (Handle array manually in str case conversion methods)
- #52218 (Amend option.take examples)
- #52418 (Do not use desugared ident when suggesting adding a type)
- #52439 (Revert some changes from #51917 to fix custom libdir)
- #52455 (Fix doc comment: use `?` instead of `.unwrap()`)
- #52458 (rustc: Fix a suggestion for the `proc_macro` feature)
- #52464 (Allow clippy to be installed with make install)
- #52472 (rustc: Enable `use_extern_macros` in 2018 edition)
- #52477 (Clarify short-circuiting behvaior of Iterator::zip.)
- #52480 (Cleanup #24958)
- #52487 (Don't build twice the sanitizers on Linux)
- #52510 (rustdoc: remove FIXME about macro redirects)
Failed merges:
r? @ghost
This commit stabilizes the `#[wasm_import_module]` attribute as
`#[link(wasm_import_module = "...")]`. Tracked by #52090 this new directive in
the `#[link]` attribute is used to configured the module name that the imports
are listed with. The WebAssembly specification indicates two utf-8 names are
associated with all imported items, one for the module the item comes from and
one for the item itself. The item itself is configurable in Rust via its
identifier or `#[link_name = "..."]`, but the module name was previously not
configurable and defaulted to `"env"`. This commit ensures that this is also
configurable.
Closes#52090
This commit changes the exit status of rustc to 1 in the presence of
compilation errors. In the event of an unexpected panic (ICE) the
standard panic error exit status of 101 remains.
A run-make test is added to ensure that the exit code does not regress,
and compiletest is updated to check for an exit status of 1 or 101,
depending on the mode and suite.
This is a breaking change for custom drivers.
Fixes#51971.
rustc: Use link_section, not wasm_custom_section
This commit transitions definitions of custom sections on the wasm target from
the unstable `#[wasm_custom_section]` attribute to the
already-stable-for-other-targets `#[link_section]` attribute. Mostly the same
restrictions apply as before, except that this now applies only to statics.
Closes#51088
This commit polishes off this new function to compile on newer rustc as well as
update and add a suite of test cases to work with this new check for lints.
This commit transitions definitions of custom sections on the wasm target from
the unstable `#[wasm_custom_section]` attribute to the
already-stable-for-other-targets `#[link_section]` attribute. Mostly the same
restrictions apply as before, except that this now applies only to statics.
Closes#51088
CTFE: use binary_op to compare integer with match disriminant
This is needed to unblock https://github.com/solson/miri/pull/401: There is code in the Windows initialization functions that uses `match` to test whether a pointer is NULL.
I will add a testcase in miri; I was not sure where to add a testcase in Rust itself.
r? @oli-obk
Don't display default generic parameters in diagnostics that compare types
In errors like:
```
expected type: `RawVec<foo, Global>`
found type: `foo`
```
`RawVec` being defined as `RawVec<T, A: Alloc = Global>`, the error is better written as
```
expected type: `RawVec<foo>`
found type: `foo`
```
In fact, that is already what happens when `foo` is not an ADT, because in that case, the diagnostic handler doesn't try to highlight something, and just uses the `Display` trait instead of its own logic.
e.g.
```
expected type: `RawVec<usize>`
found type: `usize`
```
Add the `amdgpu-kernel` ABI.
Technically, there are requirements imposed by the LLVM
`AMDGPUTargetMachine` on functions with this ABI (eg, the return type
must be void), but I'm unsure exactly where this should be enforced.
Technically, there are requirements imposed by the LLVM
`AMDGPUTargetMachine` on functions with this ABI (eg, the return type
must be void), but I'm unsure exactly where this should be enforced.
NLL: Suggest `ref mut` and `&mut self`
Fixes#51244. Supersedes #51249, I think.
Under the old lexical lifetimes, the compiler provided helpful suggestions about adding `mut` when you tried to mutate a variable bound as `&self` or (explicit) `ref`. NLL doesn't have those suggestions yet. This pull request adds them.
I didn't bother making the help text exactly the same as without NLL, but I can if that's important.
(Originally this was supposed to be part of #51612, but I got bogged down trying to fit everything in one PR.)
nll experiment: compute SCCs instead of iterative region solving
This is an attempt to speed up region solving by replacing the current iterative dataflow with a SCC computation. The idea is to detect cycles (SCCs) amongst region constraints and then compute just one value per cycle. The graph with all cycles removed is of course a DAG, so we can then solve constraints "bottom up" once the liveness values are known.
I kinda ran out of time this morning so the last commit is a bit sloppy but I wanted to get this posted, let travis run on it, and maybe do a perf run, before I clean it up.
