Rollup merge of #53895 - joshtriplett:tidy-tidy, r=nikomatsakis
tidy: Cleanups and clippy warning fixes
This eliminates various clippy warnings in the tidy tool, as well as
making some related cleanups. These changes should not introduce any
functional differences.
Rollup merge of #53860 - pnkfelix:issue-53764-migrate-run-pass-to-ui, r=nikomatsakis
Migrate (some) of run-pass/ to ui
This is a step towards addressing #53764. Much still remains.
I went through a large portion of the `*.rs` files that were directly stored into `src/test/run-pass/` and moved them into various subdirectories of a newly created `src/test/ui/run-pass/`.
(yes, it would have perhaps been nice to meld it more directly with directories already in `src/test/ui/`; but the sad truth is that opens up the reality of filename collisions, and one of my short term goals for resolving #53764 is to keep the *filenames* invariant, even as their parents directories and contents are mildly revised...)
Rollup merge of #53550 - brson:recurring, r=estebank
librustc_lint: In recursion warning, change 'recurring' to 'recursing'
The existing wording seems incorrect.
Aside: This warning, 'function cannot return without recursing' is not perfectly clear - it implies that the function _can_ return, it's just got to recurse. But really the fn cannot return period. Clearer wording: 'function recurses infinitely; it cannot return'; or 'function is infinitely self-recursive; it cannot return, and this is probably an error'. I like that.
Rollup merge of #53299 - MagnumOpus21:fix-macro-write, r=steveklabnik
Updated core/macros.rs to note it works in a no_std environment.
Fixes #45797
This PR updates the documentation of `write!` to note it works in a `no_std` environment, and adds an
example to showcase this. In a `no_std` environment, the author of the code is responsible for the
implementation of the `Write` trait. This example will work out of the box with `no_std`, but the
implementation of `Write` is expected to be provided by the user.
Auto merge of #54005 - eddyb:uniform-paths-self-resolve, r=petrochenkov
rustc_resolve: allow `use crate_name;` under `uniform_paths`.
Specifically, `use crate_name;` and `use crate_name::{self, ...};` are now allowed, whereas previously there would produce a (false positive) ambiguity error, as the ambiguity detection code was seeing the `crate_name` import as a locally-available definition to conflict with the crate.
r? @petrochenkov cc @aturon @joshtriplett @Centril
Auto merge of #53575 - matthewjasper:unsized-is-an-error, r=estebank
Don't reduce E0161 to a warning in NLL migrate mode
This error has been on stable for a while, and allowing such code cause the compile to later ICE (since we can't codegen it). Errors `box UNSIZED EXPR` with unsized locals because it's not compatible with the current evaluation order (create the box before evaluating the expressions).
Auto merge of #52626 - brunocodutra:issue-52475, r=oli-obk
Fix issue #52475: Make loop detector only consider reachable memory
As [suggested](https://github.com/rust-lang/rust/pull/51702#discussion_r197585664) by @oli-obk `alloc_id`s should be ignored by traversing all `Allocation`s in interpreter memory at a given moment in time, beginning by `ByRef` locals in the stack.
- [x] Generalize the implementation of `Hash` for `EvalSnapshot` to traverse `Allocation`s
- [x] Generalize the implementation of `PartialEq` for `EvalSnapshot` to traverse `Allocation`s
- [x] Commit regression tests
That is, opting to ignore stable `#![feature(..)]`, under my theory
that a reviewer would prefer as much stuff to be bucketed under "ah
another `#![allow(..)]` here." as possible.
Add `#![allow(improper_ctypes)]` to extern-pass-empty.rs; note this test seems bogus.
that is, I suspect it should be retired because it is testing behavior
(namely a `#[repr(C)] struct Empty;`) that, if I understand correctly,
is undefined.
Auto merge of #53707 - eddyb:phantom-waffles, r=oli-obk
rustc_typeck: turn `where Type:,` into a WF(Type) predicate, instead of ignoring it.
Fixes #53696, assuming crater doesn't catch anyone using this syntax already.
Allowing an empty list of bounds in the grammar was done for the benefit of macro authors, most of which would *probably* be using it for bounds on type parameters, which are always WF.
Auto merge of #53721 - arielb1:exhaustively-unpun, r=nikomatsakis
fix `is_non_exhaustive` confusion between structs and enums
Structs and enums can both be non-exhaustive, with a very different
meaning. This PR splits `is_non_exhaustive` to 2 separate functions - 1
for structs, and another for enums, and fixes the places that got the
usage confused.
Auto merge of #53955 - alexcrichton:fix-dist-again, r=japaric
rustbuild: Tweak LLVM distribution layout
This commit tweaks the layout of a few components that we distribute to
hopefully fix across all platforms the recent issues with LLD being unable to
find the LLVM shared object. In #53245 we switched to building LLVM as a dynamic
library, which means that LLVM tools by default link to LLVM dynamically rather
than statically. This in turn means that the tools, at runtime, need to find the
LLVM shared library.
LLVM's shared library is currently distributed as part of the rustc component.
This library is located, however, at `$sysroot/lib`. The LLVM tools we ship are
in two locations:
* LLD is shipped at `$sysroot/lib/rustlib/$host/bin/rust-lld`
* Other LLVM tools are shipped at `$sysroot/bin`
Each LLVM tool has an embedded rpath directive indicating where it will search
for dynamic libraries. This currently points to `../lib` and is presumably
inserted by LLVM's build system. Unfortunately, though, this directive is only
correct for the LLVM tools at `$sysroot/bin`, not LLD!
This commit is targeted at fixing this situation by making two changes:
* LLVM tools other than LLD are moved in the distribution to
`$sysroot/lib/rustlib/$host/bin`. This moves them next to LLD and should
position them for...
* The LLVM shared object is moved to `$sysroot/lib/rustlib/$host/lib`
Together this means that all tools should natively be able to find the shared
object and the shared object should be installed all the time for the various
tools. Overall this should...
Auto merge of #52994 - varkor:trim_direction, r=alexcrichton
Add trim_start, trim_end etc.; deprecate trim_left, trim_right, etc. in future
Adds the methods: `trim_start`, `trim_end`, `trim_start_matches` and `trim_end_matches`.
Deprecates `trim_left`, `trim_right`, `trim_left_matches` and `trim_right_matches` starting from Rust 1.33.0, three versions from when they'll initially be marked as being deprecated, using the future deprecation from https://github.com/rust-lang/rust/issues/30785 and https://github.com/rust-lang/rust/pull/51681.
Auto merge of #53951 - tromey:restore-lldb-build, r=alexcrichton
Restore lldb build
commit 6c10142251 ("Update LLVM submodule") disabled the lldb build.
This patch updates the lldb and clang submodules to once again build
against the LLVM that is included in the Rust tree, and reverts the
.travis.yml changes from that patch.
Alex Crichton [Tue, 4 Sep 2018 19:57:27 +0000 (12:57 -0700)]
rustbuild: Tweak LLVM distribution layout
This commit tweaks the layout of a few components that we distribute to
hopefully fix across all platforms the recent issues with LLD being unable to
find the LLVM shared object. In #53245 we switched to building LLVM as a dynamic
library, which means that LLVM tools by default link to LLVM dynamically rather
than statically. This in turn means that the tools, at runtime, need to find the
LLVM shared library.
LLVM's shared library is currently distributed as part of the rustc component.
This library is located, however, at `$sysroot/lib`. The LLVM tools we ship are
in two locations:
* LLD is shipped at `$sysroot/lib/rustlib/$host/bin/rust-lld`
* Other LLVM tools are shipped at `$sysroot/bin`
Each LLVM tool has an embedded rpath directive indicating where it will search
for dynamic libraries. This currently points to `../lib` and is presumably
inserted by LLVM's build system. Unfortunately, though, this directive is only
correct for the LLVM tools at `$sysroot/bin`, not LLD!
This commit is targeted at fixing this situation by making two changes:
* LLVM tools other than LLD are moved in the distribution to
`$sysroot/lib/rustlib/$host/bin`. This moves them next to LLD and should
position them for...
* The LLVM shared object is moved to `$sysroot/lib/rustlib/$host/lib`
Together this means that all tools should natively be able to find the shared
object and the shared object should be installed all the time for the various
tools. Overall this should...
Auto merge of #53878 - alexcrichton:wasm-atomics-feature, r=eddyb
rustc: Prepare the `atomics` feature for wasm
This commit adds a few changes for atomic instructions on the
`wasm32-unknown-unknown` target. Atomic instructions are not yet stable in
WebAssembly itself but there are multiple implementations and LLVM has support
for the proposed instruction set, so let's work on exposing it!
Here there are a few inclusions:
* The `atomics` feature was whitelisted for LLVM, allowing code in Rust to
enable/disable/gate on this.
* The `singlethread` option is turned off for wasm when the `atomics` feature is
enabled. This means that by default wasm won't be lowering with atomics, but
when atomics are enabled globally we'll turn off single-threaded mode to
actually codegen atomics. This probably isn't what we'll want in the long term
but for now it should work.
* Finally the maximum atomic width is increased to 64 to reflect the current
wasm spec.
Auto merge of #53075 - Mark-Simulacrum:update-cargolock, r=alexcrichton
Update Cargo.lock
This also includes major version bumps for the rand crate used by core, std, and alloc tests, among other crates (regex, etc.) used elsewhere. Since these are all internal there should be no user-visible changes.
Auto merge of #53027 - matklad:once_is_completed, r=alexcrichton
Allow to check if sync::Once is already initialized
Hi!
I propose to expose a way to check if a `Once` instance is initialized.
I need it in `once_cell`. `OnceCell` is effetively a pair of `(Once, UnsafeCell<Option<T>>)`, which can set the `T` only once. Because I can't check if `Once` is initialized, I am forced to add an indirection and check the value of ptr instead:
The `parking_lot`'s version of `Once` exposes the state as an enum: https://docs.rs/parking_lot/0.6.3/parking_lot/struct.Once.html#method.state.
I suggest, for now, just to add a simple `bool` function: this fits my use-case perfectly, exposes less implementation details, and is forward-compatible with more fine-grained state checking.
Tom Tromey [Tue, 4 Sep 2018 15:55:41 +0000 (09:55 -0600)]
Restore lldb build
commit 6c10142251 ("Update LLVM submodule") disabled the lldb build.
This patch updates the lldb and clang submodules to once again build
against the LLVM that is included in the Rust tree, and reverts the
.travis.yml changes from that patch.
Auto merge of #53870 - Xanewok:update-rls, r=oli-obk
Update RLS and Rustfmt
RLS
* Allow project model to download crates ([#1020](https://github.com/rust-lang-nursery/rls/pull/1020))
* Support simple external builds ([#988](https://github.com/rust-lang-nursery/rls/pull/988))
* Support using external Rustfmt ([#990](https://github.com/rust-lang-nursery/rls/pull/990))
Rustfmt (0.99.4)
* Format chains with comment ([#2899](https://github.com/rust-lang-nursery/rls/pull/2899))
* Do not show wildcard pattern in slice pattern ([#2912](https://github.com/rust-lang-nursery/rls/pull/2912))
* Impl only use ([#2951](https://github.com/rust-lang-nursery/rls/pull/2951))
* ... and [more](https://github.com/rust-lang-nursery/rustfmt/compare/5c9a2b6c13d3b6f8d3f9c02b130bb4b54fd489fb...1c408818c8a752dd584e7858b4afd3ceb011a7da)
Bumped in tandem to pull a single version of `rustc-ap-*` libs.
Auto merge of #53927 - ljedrz:save_analysis_cleanups, r=oli-obk
A few cleanups and minor improvements to save_analysis
- calculate the capacity of some `Vec`s
- change`to_owned()` to `clone()` for the purposes of `lower_attributes`
- remove a superfluous `clone()`
- prefer `to_owned()` to `to_string()`
- a few other minor improvements
Auto merge of #53673 - michaelwoerister:incr-thinlto-2000, r=alexcrichton
Enable ThinLTO with incremental compilation.
This is an updated version of #52309. This PR allows `rustc` to use (local) ThinLTO and incremental compilation at the same time. In theory this should allow for getting compile-time improvements for small changes while keeping the runtime performance of the generated code roughly the same as when compiling non-incrementally.
The difference to #52309 is that this version also caches the pre-LTO version of LLVM bitcode. This allows for another layer of caching:
1. if the module itself has changed, we have to re-codegen and re-optimize.
2. if the module itself has not changed, but a module it imported from during ThinLTO has, we don't need to re-codegen and don't need to re-run the first optimization phase. Only the second (i.e. ThinLTO-) optimization phase is re-run.
3. if neither the module itself nor any of its imports have changed then we can re-use the final, post-ThinLTO version of the module. (We might have to load its pre-ThinLTO version though so it's available for other modules to import from)
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