Auto merge of #62555 - Centril:rollup-ti46adx, r=Centril
Rollup of 5 pull requests
Successful merges:
- #61853 (Emit warning when trying to use PGO in conjunction with unwinding on …)
- #62278 (Add Iterator::partition_in_place() and is_partitioned())
- #62283 (Target::arch can take more than listed options)
- #62393 (Fix pretty-printing of `$crate` (take 4))
- #62474 (Prepare for LLVM 9 update)
Rollup merge of #62474 - nikic:update-llvm, r=alexcrichton
Prepare for LLVM 9 update
Main changes:
* In preparation for opaque pointer types, the `byval` attribute now takes a type. As such, the argument type needs to be threaded through to the function/callsite attribute application logic.
* On ARM the `+fp-only-sp` and `+d16` features have become `-fp64` and `-d32`. I've switched the target definitions to use the new names, but also added bidirectional emulation so either can be used on any LLVM version for backwards compatibility.
* The datalayout can now specify function pointer alignment. In particular on ARM `Fi8` is specified, which means that function pointer alignment is independent of function alignment. I've added this to our datalayouts to match LLVM (which is something we check) and strip the fnptr alignment for older LLVM versions.
* The fmul/fadd reductions now always respect the accumulator (including for unordered reductions), so we should pass the identity instead of undef.
Open issues:
* https://reviews.llvm.org/D62106 causes linker errors with ld.bdf due to https://sourceware.org/bugzilla/show_bug.cgi?id=24784. To avoid this I've enabled `RelaxELFRelocations`, which results in a GOTPCRELX relocation for `__tls_get_addr` and avoids the issue. However, this is likely not acceptable because relax relocations are not supported by older linker versions. We may need an LLVM option to keep using PLT for `__tls_get_addr` despite `RtLibUseGOT`.
The corresponding llvm-project PR is https://github.com/rust-lang/llvm-project/pull/19.
Rollup merge of #62393 - petrochenkov:notto-disu, r=Mark-Simulacrum
Fix pretty-printing of `$crate` (take 4)
Pretty-print `$crate` as `crate` or `crate_name` in unstructured tokens like `a $crate c` in `foo!(a $crate c)`, but only if those tokens are printed as a part of AST pretty-printing, rather than as a standalone token stream.
Rollup merge of #62283 - fintelia:patch-5, r=Mark-Simulacrum
Target::arch can take more than listed options
A list of options in a comment like this is almost guaranteed to become out of date: right now it is missing "riscv32" and "riscv64" and perhaps other architectures as well.
Rollup merge of #62278 - cuviper:iter-partition, r=alexcrichton
Add Iterator::partition_in_place() and is_partitioned()
`partition_in_place()` swaps `&mut T` items in-place to satisfy the
predicate, so all `true` items precede all `false` items. This requires
a `DoubleEndedIterator` so we can search from front and back for items
that need swapping.
`is_partitioned()` checks whether the predicate is already satisfied.
Auto merge of #62542 - Centril:rollup-5mpb8tu, r=Centril
Rollup of 9 pull requests
Successful merges:
- #62417 (Fix ICEs when `Self` is used in type aliases)
- #62450 (Raise the default recursion limit to 128)
- #62470 (Prevent shrinking of "crate select" element on Firefox)
- #62515 (cli: make help output for -l and -L consistent)
- #62520 (Regression test for issue 42574.)
- #62526 (normalize use of backticks in compiler messages for libsyntax/feature_gate.rs)
- #62527 (clarify that debug_assert does not completely omits the code)
- #62535 (ci: Configure $CI_JOB_NAME correctly)
- #62541 (Add spastorino for rustc-guide toolstate)
Josh Stone [Mon, 1 Jul 2019 18:49:44 +0000 (11:49 -0700)]
Add Iterator::partition_mut() and is_partitioned()
`partition_mut()` swaps `&mut T` items in-place to satisfy the
predicate, so all `true` items precede all `false` items. This requires
a `DoubleEndedIterator` so we can search from front and back for items
that need swapping.
`is_partitioned()` checks whether the predicate is already satisfied.
Rollup merge of #62527 - matklad:debug-assert, r=Centril
clarify that debug_assert does not completely omits the code
TIL that debug_assert is implemented using `if cfg!(debug_assertions)`
rather than `#[cfg(debug_assertions)]`. This means one can not use API
gated with `#[cfg(debug_assertions)]` in `debug_assert` family of
macros.
Rollup merge of #62450 - nagisa:reclimit, r=pnkfelix
Raise the default recursion limit to 128
The previous limit of 64 is being (just) barely hit by genuine code out there, which is causing issues like https://github.com/rust-lang/rust/issues/62059 to rear their end.
Ideally, we wouldn’t have such arbitrary limits at all, but while we do, it makes a lot of sense to just raise this limit whenever genuine use-cases end up hitting it.
Rollup merge of #62417 - alexreg:fix-self-in-type-alias, r=pnkfelix
Fix ICEs when `Self` is used in type aliases
I think it is right just to disallow this at resolution stage rather than let typeck produce a cyclic error. This is in line with previous behaviour. There was probably no need at all for the change that introduced this bug in #57428, so I've simply reversed it.
Auto merge of #62233 - matthewjasper:exit-arm-scopes, r=pnkfelix
Exit arm scopes
Due to a bug in the HIR CFG construction, borrows for arm scopes were incorrectly leaking into other arms.
This PR also includes some drive-by improvements to `-Zunpretty=hir,identified` that would have been helpful while investigating this.
clarify that debug_assert does not completely omits the code
TIL that debug_assert is implemented using `if cfg!(debug_assertions)`
rather than `#[cfg(debug_assertions)]`. This means one can not use API
gated with `#[cfg(debug_assertions)]` in `debug_assert` family of
macros.
Auto merge of #62460 - RalfJung:llvm-null, r=eddyb
Handle null from LLVMRustGetSectionName
As part of https://github.com/rust-lang/rust/pull/58783 and https://github.com/rust-lang/rust/pull/62103, this incorrect use of a NULL pointer was found in the interface to LLVM. That PR is stuck with some linker issues, but there is no reason the soundness fix should have to wait for that.
Rollup merge of #62403 - SimonSapin:concat, r=alexcrichton
Replace SliceConcatExt trait with inherent methods and SliceConcat helper trait
Before this change `SliceConcatExt` was an unstable extension trait with stable methods. It was in the libstd prelude, so that its methods could be used on the stable channel.
This replaces it with inherent methods, which can be used without any addition to the prelude. Since the methods are stable and very generic (with for example a return type that depends on the types of parameters), an helper trait is still needed. But now that trait does not need to be in scope for the methods to be used.
Removing this depedency on the libstd prelude allows the methods to be used in `#![no_std]` crate that use liballoc, which does not have its own implicitly-imported prelude.
I want to do this so that I can write a `serde::Serializer` that forwards to our format builders, so that any `T: Serialize` can also be treated like a `T: Debug`.
Auto merge of #62473 - timvermeulen:is_sorted_by_key, r=scottmcm
Only call the closure parameter of Iterator::is_sorted_by_key once per item
See https://github.com/rust-lang/rust/issues/53485#issuecomment-472314004.
This changes `Iterator::is_sorted_by_key` to only call the given closure once for each item, which allows us to pass the items to the closure by value instead of by reference.
**Important**: `is_sorted_by_key` for slices and slice iterators is now no longer implemented in terms of the custom `slice::Iter::is_sorted_by` implementation. It's a trade-off: we could forward `slice::Iter::is_sorted_by_key` to it directly for potential SIMD benefits, but that would mean that the closure is potentially called twice for (almost) every element of the slice.
Rewrite with future-compat lint for indirect pattern omitting
`#[structural_match]`.
Outline of changes:
* Recur as deeply as necessary when searching for `#[structural_match]`.
* `#[structural_match]`: handle case of `const A: & &Wrap(NoDerive)`
by including the fields of an ADT during traversal of input
type. (We continue to not traverse the substs of an ADT, though, so
that we continue to handle `PhantomData<NoDerive>` and `*NoDerive`
properly.)
* Refactored code to use `match` instead of `if let`. This ends up
*with less* right-ward drift by moving the handling of the main
*`ty::Adt` case *outside* the match.
* Using lint (rather than hard error) mmeans we need to check that
type is `PartialEq` to avoid ICE'ing the compiler in scneario where
MIR codegen dispatches to `PartialEq::eq`. Added said check, and
fatal error in that case.
Auto merge of #62485 - Centril:rollup-gg3it1u, r=Centril
Rollup of 5 pull requests
Successful merges:
- #62356 (Implement Option::contains and Result::contains)
- #62462 (Document `while` keyword)
- #62472 (Normalize use of backticks in compiler messages p2)
- #62477 (Re-add bootstrap attribute to libunwind for llvm-libunwind feature)
- #62478 (normalize use of backticks for compiler messages in librustc_codegen)
Rollup merge of #62477 - petrhosek:unwind-bootstrap, r=cramertj
Re-add bootstrap attribute to libunwind for llvm-libunwind feature
This was removed in 8a7dded, but since #62286 hasn't yet made it into
beta, this is breaking the build with llvm-libunwind feature enabled.
Furthemore, restrict the link attribute to Fuchsia and Linux, matching
the logic in build.rs since llvm-libunwind feature isn't yet supported
on other systems.
Petr Hosek [Sun, 7 Jul 2019 22:45:04 +0000 (15:45 -0700)]
Re-add bootstrap attribute to libunwind for llvm-libunwind feature
This was removed in 8a7dded, but since #62286 hasn't yet made it into
beta, this is breaking the build with llvm-libunwind feature enabled.
Furthemore, restrict the link attribute to Fuchsia and Linux, matching
the logic in build.rs since llvm-libunwind feature isn't yet supported
on other systems.
Scott McMurray [Sat, 6 Jul 2019 06:59:59 +0000 (23:59 -0700)]
Use const generics for array impls, restricted to 0..=32
- uses a never-stable core::array::LengthAtMost32 to bound the impls
- includes a custom error message to avoid mentioning LengthAtMost32 too often
- doesn't use macros for the slice implementations to avoid #62433
Auto merge of #62467 - Centril:rollup-083tn7t, r=Centril
Rollup of 4 pull requests
Successful merges:
- #61883 (`non_ascii_idents` lint (part of RFC 2457))
- #62042 (Support stability and deprecation checking for all macros)
- #62213 (rustdoc: set cfg(doctest) when collecting doctests)
- #62286 (Check if the archive has already been added to avoid duplicates)
Rollup merge of #62286 - petrhosek:rustc-no-duplicate-archives, r=cramertj
Check if the archive has already been added to avoid duplicates
This avoids adding archives multiple times, which results in duplicate
objects in the resulting rlib, leading to symbol collision and link
failures. This could happen when crate contains multiple link attributes
that all reference the same archive.
Rollup merge of #62213 - QuietMisdreavus:cfg-doctest, r=GuillaumeGomez
rustdoc: set cfg(doctest) when collecting doctests
Note: This PR builds on top of https://github.com/rust-lang/rust/pull/61199; only the last commit is specific to this PR.
As discussed in https://github.com/rust-lang/rust/pull/61199, we want the ability to isolate items to only when rustdoc is collecting doctests, but we can't use `cfg(test)` because of libcore's `#![cfg(not(test))]`. This PR proposes a new cfg flag, `cfg(doctest)`, specific to this situation, rather than reusing an existing flag. I've isolated it behind a feature gate so that we can contain the effects to nightly only. (A stable workaround that can be used in lieu of `#[cfg(doctest)]` is `#[cfg(rustdoc)] #[doc(hidden)]`, at least once https://github.com/rust-lang/rust/pull/61351 lands.)
Rollup merge of #61883 - zackmdavis:non_ascii_idents_lint, r=Manishearth
`non_ascii_idents` lint (part of RFC 2457)
RFC 2457 [declares](https://github.com/rust-lang/rfcs/blob/121bbeff500c3274cea22c7e0ca176274d592646/text/2457-non-ascii-idents.md): "A `non_ascii_idents` lint is added to the compiler. This lint is allow by default."
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