Rollup merge of #63919 - matthewjasper:remove-gensymmed, r=petrochenkov
Use hygiene for AST passes
AST passes are now able to have resolve consider their expansions as if they were opaque macros defined either in some module in the current crate, or a fake empty module with `#[no_implicit_prelude]`.
* Add an ExpnKind for AST passes.
* Remove gensyms in AST passes.
* Remove gensyms in`#[test]`, `#[bench]` and `#[test_case]`.
* Allow opaque macros to define tests.
* Move tests for unit tests to their own directory.
* Remove `Ident::{gensym, is_gensymed}` - `Ident::gensym_if_underscore` still exists.
Auto merge of #63789 - Wind-River:master, r=alexcrichton
Support both static and dynamic linking mode in testing for vxWorks
1. Support both static and dynamic linking mode in testing for vxWorks
2. Ignore unsupported test cases: net:tcp:tests:timeouts and net:ucp:tests:timeouts
Auto merge of #64230 - Centril:rollup-vxyczjq, r=Centril
Rollup of 8 pull requests
Successful merges:
- #63565 (Rust 2018: NLL migrate mode => hard error)
- #63969 (Add missing examples for Option type)
- #64067 (Remove no-prefer-dynamic from valgrind tests)
- #64166 (Better way of conditioning the sanitizer builds)
- #64189 (annotate-snippet emitter: Deal with multispans from macros, too)
- #64202 (Fixed grammar/style in some error messages)
- #64206 (annotate-snippet emitter: Update an issue number)
- #64208 (it's more pythonic to use 'is not None' in python files)
Rollup merge of #64189 - phansch:add_macros_support, r=estebank
annotate-snippet emitter: Deal with multispans from macros, too
This moves the two methods from the `EmitterWriter` impl to trait
default methods in the `Emitter` trait so that they can be re-used by
the `AnnotateSnippetEmitterWriter`.
Rollup merge of #64166 - infinity0:master, r=alexcrichton
Better way of conditioning the sanitizer builds
Previously the build would take the presence of the LLVM_CONFIG envvar to
mean that the sanitizers should be built, but this is a common envvar that
could be set for reasons unrelated to the rustc sanitizers.
This commit adds a new envvar RUSTC_BUILD_SANITIZERS and uses it instead.
This PR or similar will be necessary in order to work correctly with https://github.com/rust-lang-nursery/compiler-builtins/pull/296
Rollup merge of #63565 - Centril:deny-nll-migrate-mode, r=matthewjasper
Rust 2018: NLL migrate mode => hard error
As per decision on a language team meeting as described in https://github.com/rust-lang/rust/pull/63565#issuecomment-528563744, we refuse to downgrade NLL errors, that AST borrowck accepts, into warnings and keep them as hard errors.
Auto merge of #64209 - Centril:rollup-x9kvjb7, r=Centril
Rollup of 10 pull requests
Successful merges:
- #63676 (Use wasi crate for Core API)
- #64094 (Improve searching in rustdoc and add tests)
- #64111 (or-patterns: Uniformly use `PatKind::Or` in AST & Fix/Cleanup resolve)
- #64156 (Assume non-git LLVM is fresh if the stamp file exists)
- #64161 (Point at variant on pattern field count mismatch)
- #64174 (Add missing code examples on Iterator trait)
- #64175 (Fix invalid span generation when it should be div)
- #64186 (std: Improve downstream codegen in `Command::env`)
- #64190 (fill metadata in rustc_lexer's Cargo.toml)
- #64198 (Add Fuchsia to actually_monotonic)
Rollup merge of #64186 - alexcrichton:improve-env-codegen, r=sfackler
std: Improve downstream codegen in `Command::env`
This commit rejiggers the generics used in the implementation of
`Command::env` with the purpose of reducing the amount of codegen that
needs to happen in consumer crates, instead preferring to generate code
into libstd.
This was found when profiling the compile times of the `cc` crate where
the binary rlib produced had a lot of `BTreeMap` code compiled into it
but the crate doesn't actually use `BTreeMap`. It turns out that
`Command::env` is generic enough to codegen the entire implementation in
calling crates, but in this case there's no performance concern so it's
fine to compile the code into the standard library.
This change is done by removing the generic on the `CommandEnv` map
which is intended to handle case-insensitive variables on Windows.
Instead now a generic isn't used but rather a `use` statement defined
per-platform is used.
With this commit a debug build of `Command::new("foo").env("a", "b")`
drops from 21k lines of LLVM IR to 10k.
Rollup merge of #64156 - cuviper:gitless-llvm, r=alexcrichton
Assume non-git LLVM is fresh if the stamp file exists
Rustbuild usually writes the LLVM submodule commit in a stamp file, so
we can avoid rebuilding it unnecessarily. However, for builds from a
source tarball (non-git), we were assuming a rebuild is always needed.
This can cause a lot of extra work if any environment like `CFLAGS`
changed between steps like build and install, which are often separate
in distro builds.
Now we also write an empty stamp file if the git commit is unknown, and
its presence is trusted to indicate that no rebuild is needed. An info
message reports that this is happening, along with the stamp file path
that can be deleted to force a rebuild anyway.
- Adjust `librustc_resolve/late.rs` to correctly handle or-patterns at any level of nesting as a result.
In particular, the already-bound check which rejects e.g. `let (a, a);` now accounts for or-patterns. The consistency checking (ensures no missing bindings and binding mode consistency) also now accounts for or-patterns. In the process, a bug was found in the current compiler which allowed:
```rust
enum E<T> { A(T, T), B(T) }
use E::*;
fn foo() {
match A(0, 1) {
B(mut a) | A(mut a, mut a) => {}
}
}
```
The new algorithms took a few iterations to get right. I tried several clever schemes but ultimately a version based on a stack of hashsets and recording product/sum contexts was chosen since it is more clearly correct.
- Clean up `librustc_resolve/late.rs` by, among other things, using a new `with_rib` function to better ensure stack dicipline.
- Do not push the change in AST to HIR for now to avoid doing too much in this PR. To cope with this, we introduce a temporary hack in `rustc::hir::lowering` (clearly marked in the diff).
cc https://github.com/rust-lang/rust/issues/54883
cc @dlrobertson @matthewjasper
r? @petrochenkov
Rollup merge of #64094 - kawa-yoiko:rustdoc-search, r=GuillaumeGomez
Improve searching in rustdoc and add tests
👋 I have made searching in rustdoc more intuitive, added a couple more tests and made a little shell script to aid testing. Closes #63005.
It took me quite a while to figure out how to run the tests for rustdoc (instead of running tests for other crates with rustdoc); the only pointer I found was [hidden in the rustc book](https://rust-lang.github.io/rustc-guide/rustdoc.html#cheat-sheet). Maybe this could be better documented? I shall be delighted to help if it is desirable.
Philipp Hansch [Thu, 5 Sep 2019 19:31:12 +0000 (21:31 +0200)]
annotate-snippet emitter: Deal with multispans from macros, too
This moves the two methods from the `EmitterWriter` impl to trait
default methods in the `Emitter` trait so that they can be re-used by
the `AnnotateSnippetEmitterWriter`.
Alex Crichton [Wed, 4 Sep 2019 02:32:44 +0000 (19:32 -0700)]
std: Improve downstream codegen in `Command::env`
This commit rejiggers the generics used in the implementation of
`Command::env` with the purpose of reducing the amount of codegen that
needs to happen in consumer crates, instead preferring to generate code
into libstd.
This was found when profiling the compile times of the `cc` crate where
the binary rlib produced had a lot of `BTreeMap` code compiled into it
but the crate doesn't actually use `BTreeMap`. It turns out that
`Command::env` is generic enough to codegen the entire implementation in
calling crates, but in this case there's no performance concern so it's
fine to compile the code into the standard library.
This change is done by removing the generic on the `CommandEnv` map
which is intended to handle case-insensitive variables on Windows.
Instead now a generic isn't used but rather a `use` statement defined
per-platform is used.
With this commit a debug build of `Command::new("foo").env("a", "b")`
drops from 21k lines of LLVM IR to 10k.
Auto merge of #64172 - Centril:rollup-8i8oh54, r=Centril
Rollup of 11 pull requests
Successful merges:
- #62848 (Use unicode-xid crate instead of libcore)
- #63774 (Fix `window.hashchange is not a function`)
- #63930 (Account for doc comments coming from proc macros without spans)
- #64003 (place: Passing `align` = `layout.align.abi`, when also passing `layout`)
- #64030 (Fix unlock ordering in SGX synchronization primitives)
- #64041 (use TokenStream rather than &[TokenTree] for built-in macros)
- #64051 (Add x86_64-linux-kernel target)
- #64063 (Fix const_err with `-(-0.0)`)
- #64083 (Point at appropriate arm on type error on if/else/match with one non-! arm)
- #64100 (Fix const eval bug breaking run-pass tests in Miri)
- #64157 (Opaque type locations in error message for clarity.)
Rollup merge of #64100 - wesleywiser:fix_miri_const_eval, r=oli-obk
Fix const eval bug breaking run-pass tests in Miri
PR #63580 broke miri's ability to run the run-pass test suite with MIR
optimizations enabled. The issue was that we weren't properly handling
the substs and DefId associated with a Promoted value. This didn't break
anything in rustc because in rustc this code runs before the Inliner
pass which is where the DefId and substs can diverge from their initial
values. It broke Miri though because it ran this code again after
running the optimization pass.
Rollup merge of #64003 - Dante-Broggi:place-align-in-layout, r=matthewjasper
place: Passing `align` = `layout.align.abi`, when also passing `layout`
Of the calls changed:
7/12 use `align` = `layout.align.abi`.
`from_const_alloc` uses `alloc.align`, but that is `assert_eq!` to `layout.align.abi`.
only 4/11 use something interesting for `align`.
Rollup merge of #62848 - matklad:xid-unicode, r=petrochenkov
Use unicode-xid crate instead of libcore
This PR proposes to remove `char::is_xid_start` and `char::is_xid_continue` functions from `libcore` and use `unicode_xid` crate from crates.io (note that this crate is already present in rust-lang/rust's Cargo.lock).
Reasons to do this:
* removing rustc-binary-specific stuff from libcore
* making sure that, across the ecosystem, there's a single definition of what rust identifier is (`unicode-xid` has almost 10 million downs, as a `proc_macro2` dependency)
* making it easier to share `rustc_lexer` crate with rust-analyzer: no need to `#[cfg]` if we are building as a part of the compiler
Reasons not to do this:
* increased maintenance burden: we'll need to upgrade unicode version both in libcore and in unicode-xid. However, this shouldn't be a too heavy burden: just running `./unicode.py` after new unicode version. I (@matklad) am ready to be a t-compiler side maintainer of unicode-xid. Moreover, given that xid-unicode is an important dependency of syn, *someone* needs to maintain it anyway.
* xid-unicode implementation is significantly slower. It uses a more compact table with binary search, instead of a trie. However, this shouldn't matter in practice, because we have fast-path for ascii anyway, and code size savings is a plus. Moreover, in #59706 not using libcore turned out to be *faster*, presumably beacause checking for whitespace with match is even faster.
<details>
<summary>old description</summary>
Followup to #59706
r? @eddyb
Note that this doesn't actually remove tables from libcore, to avoid conflict with https://github.com/rust-lang/rust/pull/62641.
cc https://github.com/unicode-rs/unicode-xid/pull/11
Auto merge of #62800 - albins:polonius-initialization-1, r=nikomatsakis
Extend Polonius fact generation for (some) move tracking
This PR will extend rustc to emit facts used for tracking moves and initialization in Polonius. It is most likely the final part of my master's thesis work.
Ximin Luo [Thu, 5 Sep 2019 07:14:09 +0000 (00:14 -0700)]
Better way of conditioning the sanitizer builds
Previously the build would take the presence of the LLVM_CONFIG envvar to
mean that the sanitizers should be built, but this is a common envvar that
could be set for reasons unrelated to the rustc sanitizers.
This commit adds a new envvar RUSTC_BUILD_SANITIZERS and uses it instead.
Auto merge of #64160 - Centril:rollup-vrfj1pt, r=Centril
Rollup of 15 pull requests
Successful merges:
- #62860 (Stabilize checked_duration_since for 1.38.0)
- #63549 (Rev::rposition counts from the wrong end)
- #63985 (Stabilize pin_into_inner in 1.39.0)
- #64005 (Add a `Place::is_indirect` method to determine whether a `Place` contains a `Deref` projection)
- #64031 (Harden `param_attrs` test wrt. usage of a proc macro `#[attr]`)
- #64038 (Check impl trait substs when checking for recursive types)
- #64043 (Add some more tests for underscore imports)
- #64092 (Update xLTO compatibility table in rustc book.)
- #64110 (Refer to "`self` type" instead of "receiver type")
- #64120 (Move path parsing earlier)
- #64123 (Added warning around code with reference to uninit bytes)
- #64128 (unused_parens: account for or-patterns and `&(mut x)`)
- #64141 (Minimize uses of `LocalInternedString`)
- #64142 (Fix doc links in `std::cmp` module)
- #64148 (fix a few typos in comments)
Rollup merge of #64141 - nnethercote:minimize-LocalInternedString, r=petrochenkov
Minimize uses of `LocalInternedString`
`LocalInternedString` is described as "An alternative to `Symbol` and `InternedString`, useful when the chars within the symbol need to be accessed. It is best used for temporary values."
This PR makes the code match that comment, by removing all non-local uses of `LocalInternedString`. This allows the removal of a number of operations on `LocalInternedString` and a couple of uses of `unsafe`.
Rollup merge of #64123 - danielhenrymantilla:add_comment_about_uninit_integers, r=Centril
Added warning around code with reference to uninit bytes
Officially, uninitialized integers, and therefore, Rust references to them are _invalid_ (note that this may evolve into official defined behavior (_c.f._, https://github.com/rust-lang/unsafe-code-guidelines/issues/71)).
However, `::std` uses references to uninitialized integers when working with the `Read::initializer` feature (#42788), since it relies on this unstably having defined behavior with the current implementation of the compiler (IIUC).
Hence the comment to disincentivize people from using this pattern outside the standard library.
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