Oliver Scherer [Wed, 19 Jun 2019 13:58:51 +0000 (15:58 +0200)]
Remove the `AllocId` from `ByRef` values
`ByRef` const values have no identity beyond their value, we should not treat them as having identity. The `AllocId` often differed between equal constants, because of the way that the miri-engine evaluates constants.
bors [Wed, 19 Jun 2019 09:43:58 +0000 (09:43 +0000)]
Auto merge of #58351 - oli-obk:double_check_const_eval, r=RalfJung
Refactor interning to properly mark memory as mutable or immutable
r? @RalfJung
This implementation is incomplete out of multiple reasons
* [ ] add `-Zunleash_the_miri_inside_of_you` tests
* [ ] report an error if there's an `UnsafeCell` behind a reference in a constant
* [ ] make validity checks actually test whether the mutability of their allocations match what they see in the type
bors [Wed, 19 Jun 2019 06:49:13 +0000 (06:49 +0000)]
Auto merge of #61945 - Centril:rollup-xdqo2mn, r=Centril
Rollup of 11 pull requests
Successful merges:
- #61505 (Only show methods that appear in `impl` blocks in the Implementors sections of trait doc pages)
- #61701 (move stray run-pass const tests into const/ folder)
- #61748 (Tweak transparent enums and unions diagnostic spans)
- #61802 (Make MaybeUninit #[repr(transparent)])
- #61839 (ci: Add a script for generating CPU usage graphs)
- #61842 (Remove unnecessary lift calls)
- #61843 (Turn down the myriad-closures test)
- #61896 (rustc_typeck: correctly compute `Substs` for `Res::SelfCtor`.)
- #61898 (syntax: Factor out common fields from `SyntaxExtension` variants)
- #61938 (create an issue for miri even in status test-fail)
- #61941 (Preserve generator and yield source for error messages)
Rollup merge of #61941 - cramertj:no-more-yield-errors, r=centril
Preserve generator and yield source for error messages
Previously, error messages after HIR lowering all referred
to generators and yield, regardless of whether the original
source was a generator or an async/await body. This change
tracks the kind of each generator and yield source in order
to provide appropriately tailored error messages.
Rollup merge of #61843 - alexcrichton:disable-myriad-closures, r=pietroalbini
Turn down the myriad-closures test
This tests takes nearly 5 minutes to compile on CI where the CPUs we
have aren't exactly the fastest. This test does actually require all
closures to exist to exhibit the original bug, but it seems a little
excessive to test a single bug on CI on all platforms which simply pegs
a single CPU for 5 minutes with no parallelism opportunities, so this
turns down the test to still exercise it somewhat at least.
Rollup merge of #61505 - ebarnard:doc-shrink, r=GuillaumeGomez
Only show methods that appear in `impl` blocks in the Implementors sections of trait doc pages
In the "Implementors" and "Implementations on Foreign Types" sections, only show methods that appear in the `impl` block for that type. This has the benefit of
- Reducing the size of the Iterator page, and other large trait documentation pages.
- Retaining documentation on the `impl` blocks and functions in the `impl` blocks.
- Indicating which provided methods are overridden.
- Making the documentation match the structure of the code being documented.
- Being a small change that can be easily backed out if issues arise.
A set of Rust stdlib docs build with this change are [available here](https://ebarnard.github.io/2019-06-03-rust-smaller-trait-implementers-docs/).
The size of the [`Iterator` doc page](https://ebarnard.github.io/2019-06-03-rust-smaller-trait-implementers-docs/std/iter/trait.Iterator.html) is reduced from 14.4MB (latest nightly) to 724kB.
Before:
<img width="1411" alt="Screenshot 2019-06-03 at 23 12 17" src="https://user-images.githubusercontent.com/1059683/58837971-1722a780-8655-11e9-8d81-51e48130951d.png">
After:
<img width="1428" alt="Screenshot 2019-06-03 at 16 41 27" src="https://user-images.githubusercontent.com/1059683/58814907-84ffac80-861e-11e9-8692-79be473a5299.png">
Taylor Cramer [Tue, 18 Jun 2019 21:34:51 +0000 (14:34 -0700)]
Preserve generator and yield source for error messages
Previously, error messages after HIR lowering all referred
to generators and yield, regardless of whether the original
source was a generator or an async/await body. This change
tracks the kind of each generator and yield source in order
to provide appropriately tailored error messages.
bors [Tue, 18 Jun 2019 21:50:46 +0000 (21:50 +0000)]
Auto merge of #59625 - immunant:copy_variadics_typealias, r=eddyb
Refactor C FFI variadics to more closely match their C counterparts, and add Clone implementation
We had to make some changes to expose `va_copy` and `va_end` directly to users (mainly for C2Rust, but not exclusively):
- redefine the Rust variadic structures to more closely correspond to C: `VaList` now matches `va_list`, and `VaListImpl` matches `__va_list_tag`
- add `Clone` for `VaListImpl`
- add explicit `as_va_list()` conversion function from `VaListImpl` to `VaList`
- add deref coercion from `VaList` to `VaListImpl`
- add support for the `asmjs` target
All these changes were needed for use cases like:
```Rust
let mut ap2 = va_copy(ap);
vprintf(fmt, ap2);
va_end(&mut ap2);
```
bors [Tue, 18 Jun 2019 19:04:15 +0000 (19:04 +0000)]
Auto merge of #61891 - eddyb:lifetime-cleanups, r=oli-obk
rustc: remove 'x: 'y bounds (except where necessary or from comments/strings).
This PR removes all lifetime-lifetime "outlives" bounds (e.g. `'tcx: 'a`) bounds except a few necessary ones (see the `reintroduce lifetime bounds where necessary` commit).
Some of these bounds kept around otherwise-unused lifetimes (e.g. `<'a, 'tcx: 'a>` followed by uses of `'tcx` but not `'a`) - these lifetimes (i.e. `'a`) were then removed.
(maybe they should be considered unused by the lint? cc @matthewjasper @zackmdavis)
bors [Tue, 18 Jun 2019 05:16:26 +0000 (05:16 +0000)]
Auto merge of #61864 - lzutao:ptr-null, r=sfackler
Make use of `ptr::null(_mut)` instead of casting zero
There are few places that I don't replace the zero casting pointer with `ptr::null`
or `ptr::null_mut`:
```bash
% git grep -E '[ ([{]0 as \*'
src/libcore/ptr/mod.rs:216:pub const fn null<T>() -> *const T { 0 as *const T }
src/libcore/ptr/mod.rs:231:pub const fn null_mut<T>() -> *mut T { 0 as *mut T }
src/test/run-pass/consts/const-cast-ptr-int.rs:12:static a: TestStruct = TestStruct{x: 0 as *const u8};
src/test/ui/issues/issue-45730.rs:5: let x: *const _ = 0 as *const _; //~ ERROR cannot cast
src/test/ui/issues/issue-45730.rs:8: let x = 0 as *const i32 as *const _ as *mut _; //~ ERROR cannot cast
src/test/ui/issues/issue-45730.stderr:14:LL | let x: *const _ = 0 as *const _;
src/test/ui/issues/issue-45730.stderr:24:LL | let x = 0 as *const i32 as *const _ as *mut _;
src/test/ui/lint/lint-forbid-internal-unsafe.rs:15: println!("{}", evil!(*(0 as *const u8)));
src/test/ui/order-dependent-cast-inference.rs:5: let mut y = 0 as *const _;
src/test/ui/order-dependent-cast-inference.stderr:4:LL | let mut y = 0 as *const _;
```
bors [Mon, 17 Jun 2019 23:30:37 +0000 (23:30 +0000)]
Auto merge of #61915 - Centril:rollup-oire3i8, r=Centril
Rollup of 5 pull requests
Successful merges:
- #61702 (test more variants of enum-int-casting)
- #61836 (Replace some uses of NodeId with HirId)
- #61885 (Help LLVM better optimize slice::Iter(Mut)::len)
- #61893 (make `Weak::ptr_eq`s into methods)
- #61908 (don't ICE on large files)
Rollup merge of #61908 - matklad:overflow, r=petrochenkov
don't ICE on large files
This is an extremely marginal error, so the cost of properly threading
`Handler` everywhere just not seemed justified. However, it's useful
to panic when we create a file, and not when we slice strings with
overflown indexes somewhere in the guts of the compiler.
For this reason, while we provide safe `try_new_source_file`, we don't
change the existing public interface and just panic more or less
cleanly.
Rollup merge of #61893 - chpio:weak_ptr_eq_methods, r=rkruppe
make `Weak::ptr_eq`s into methods
This makes the `Weak::ptr_eq`s associated function into methods. There's no reason for methods on `Weak`s to be associated functions, as there is no `Dered` thus no possibility of a collision. Also: methods can be called using the associated function syntax.
follow up on https://github.com/rust-lang/rust/pull/55987
[Tracking issue for weak_ptr_eq](https://github.com/rust-lang/rust/issues/55981)
Rollup merge of #61836 - ljedrz:i_still_hate_node_ids, r=ljedrz
Replace some uses of NodeId with HirId
We are still using `NodeId` in some spots where we could use `HirId` instead; this PR targets some of these spots and removes some of the associated `hir::map` functions.
Rollup merge of #61702 - RalfJung:const-enum-cast, r=oli-obk
test more variants of enum-int-casting
As I learned in https://github.com/rust-lang/rust/pull/61673#issuecomment-500213506, there is a code path we are not testing yet. Looks like enum-int-casting with and without an intermediate let-binding is totally different.
EDIT: The reason for this is to get rid of the cycle in definitions such as:
```rust
enum Foo {
A = 0,
B = Foo::A as isize + 2,
}
```
This has historically been supported, so a hack adding special treatment to `Enum::Variant as _` was added to keep supporting it.
Aleksey Kladov [Mon, 17 Jun 2019 08:35:26 +0000 (11:35 +0300)]
don't ICE on large files
This is an extremely marginal error, so the cost of properly threading
`Handler` everywhere just not seemed justified. However, it's useful
to panic when we create a file, and not when we slice strings with
overflown indexes somewhere in the guts of the compiler.
For this reason, while we provide safe `try_new_source_file`, we don't
change the existing public interface and just panic more or less
cleanly.
Changes:
````
Fix wrong lifetime of TyCtxt
Use replace_region_in_file for creating the lint list
Restructure rename tests
Register rename to the LintStore.
Rename REDUNDANT_STATIC_LIFETIME to REDUNDANT_STATIC_LIFETIMES.
Remove pub from RedundantStaticLifetime.visit_type function.
Rename const_static_lifetime to redundant_static_lifetime.
Merge StaticConst and StaticStatic lints into StaticConst.
Use RedundantStaticLifetime in StaticStatic.
Move type-checking logic in StaticConst to RedundantStaticLifetime.
Add lint for statics with explicit static lifetime.
minor fix
make it pass dogfood
run rustfmt
fix padding and put clippy someplaces
show default lint levels
group printing
prelim arg parse
move Lint static def into its own module
switch to sorted usable lints
Update clippy_dev/src/main.rs
initial commit for help improvements on clippy-driver
````
bors [Sun, 16 Jun 2019 23:25:12 +0000 (23:25 +0000)]
Auto merge of #61892 - rijenkii:master, r=Centril
weird-exprs: if if if if
The `if` keyword can be chained as long as there are enough `{...} else {...}` following, and they all return a `bool` (not required for the last one).
`if` expression can be also put inside a `match` arm guard, thus making the whole thing a little bit more confusing.
Discovered this clusterfunk while reading the reference because I have nothing better to do.
bors [Sun, 16 Jun 2019 17:48:24 +0000 (17:48 +0000)]
Auto merge of #61881 - glaubitz:sparc64-ffi-abi, r=petrochenkov
librustc_codegen_llvm: Use repr(transparent) for bitflags over repr(C…
…) (#61306)
In order to make sure that Rust's bitflags types are passed the same way in the Rust ABI as they are in the C ABI, we need to use the attribute repr(transparent) over the repr(C) attribute for the single-field bitflags structs in in order to prevent ABI mismatches. Thanks to Michael Karcher for finding this bug.
bors [Sun, 16 Jun 2019 14:58:05 +0000 (14:58 +0000)]
Auto merge of #61754 - nikomatsakis:trait-caching-perf-3, r=pnkfelix
create a "provisional cache" to restore performance in the case of cycles
Introduce a "provisional cache" that caches the results of auto trait resolutions but keeps them from entering the *main* cache until everything is ready. This turned out a bit more complex than I hoped, but I don't see another short term fix -- happy to take suggestions! In the meantime, it's very clear we need to rework the trait solver. This resolves the extreme performance slowdown experienced in #60846 -- I plan to add a perf.rust-lang.org regression test to track this.
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