Auto merge of #41420 - alexcrichton:mingw-6.3.0, r=petrochenkov
appveyor: Upgrade to gcc for mingw 6.3.0
This commit sort of brings back #40777 by upgrading back to 6.3.0. While
investigating #40546 it was discovered that 6.3.0 appears to not spurious
fail in the same way that 6.2.0 does (which we're currently using). The
workaround for #40184 contained in #40777 did not work so this commit also
contains a different workaround for the gdb issue. We will not download the
6.2.0 version of gdb and use that instead of the default version that comes with
6.3.0.
Alex Crichton [Thu, 20 Apr 2017 15:35:03 +0000 (08:35 -0700)]
appveyor: Upgrade to gcc for mingw 6.3.0
This commit sort of brings back #40777 by upgrading back to 6.3.0. While
investigating #40546 it was discovered that 6.3.0 appears to not spurious
fail in the same way that 6.2.0 does (which we're currently using). The
workaround for #40184 contained in #40777 did not work so this commit also
contains a different workaround for the gdb issue. We will not download the
6.2.0 version of gdb and use that instead of the default version that comes with
6.3.0.
Auto merge of #41352 - kennytm:macos-sanitizers, r=alexcrichton
Support AddressSanitizer and ThreadSanitizer on x86_64-apple-darwin
[ASan](https://clang.llvm.org/docs/AddressSanitizer.html#supported-platforms) and [TSan](https://clang.llvm.org/docs/ThreadSanitizer.html#supported-platforms) are supported on macOS, and this commit enables their support.
The sanitizers are always built as `*.dylib` on Apple platforms, so they cannot be statically linked into the corresponding `rustc_?san.rlib`. The dylibs are directly copied to `lib/rustlib/x86_64-apple-darwin/lib/` instead.
Note, although Xcode also ships with their own copies of ASan/TSan dylibs, we cannot use them due to version mismatch.
----
~~There is a caveat: the sanitizer libraries are linked as `@rpath/` (due to https://reviews.llvm.org/D6018), so the user needs to additionally pass `-C rpath`:~~
Auto merge of #41504 - eddyb:query-api, r=nikomatsakis
Improve the librustc on-demand/query API ergonomics.
Queries are now performed through these two forms:
* `tcx.type_of(def_id)` (the most common usage)
* `tcx.at(span).type_of(def_id)` (to provide a more specific location in the cycle stack)
Several queries were renamed to work better as method names, i.e. by suffixing with `_of`.
Auto merge of #41258 - clarcharr:str_box_extras, r=Kimundi
More methods for str boxes. (reduce Box<[u8]> ↔ Box<str> transmutes)
This is a follow-up to #41096 that adds safer methods for converting between `Box<str>` and `Box<[u8]>`. They're gated under a different feature from the `&mut str` methods because they may be too niche to include in public APIs, although having them internally helps reduce the number of transmutes the standard library uses.
What's added:
* `From<Box<str>> for Box<[u8]>`
* `<Box<str>>::into_boxed_bytes` (just calls `Into::into`)
* `alloc::str` (new module)
* `from_boxed_utf8` and `from_boxed_utf8_unchecked`, defined in `alloc:str`, exported in `collections::str`
* exports `from_utf8_mut` in `collections::str` (missed from previous PR)
Auto merge of #41362 - alexcrichton:run-cargot-ests, r=aturon
Run tests for the cargo submodule in tree
Previously the `cargotest` suite would run some arbitrary revision of Cargo's
test suite, but now that we're bundling it in tree we should be running the
Cargo submodule's test suite instead.
Support AddressSanitizer and ThreadSanitizer on x86_64-apple-darwin.
ASan and TSan are supported on macOS, and this commit enables their
support.
The sanitizers are always built as *.dylib on Apple platforms, so they
cannot be statically linked into the corresponding `rustc_?san.rlib`. The
dylibs are directly copied to `lib/rustlib/x86_64-apple-darwin/lib/`
instead.
Note, although Xcode also ships with their own copies of ASan/TSan dylibs,
we cannot use them due to version mismatch.
There is a caveat: the sanitizer libraries are linked as @rpath, so the
user needs to additionally pass `-C rpath`:
Auto merge of #40123 - TimNN:llvm40, r=alexcrichton
LLVM 4.0 Upgrade
Since nobody has done this yet, I decided to get things started:
**Todo:**
* [x] push the relevant commits to `rust-lang/llvm` and `rust-lang/compiler-rt`
* [x] cleanup `.gitmodules`
* [x] Verify if there are any other commits from `rust-lang/llvm` which need backporting
* [x] Investigate / fix debuginfo ("`<optimized out>`") failures
* [x] Use correct emscripten version in docker image
Alex Crichton [Tue, 18 Apr 2017 00:24:05 +0000 (17:24 -0700)]
Run tests for the cargo submodule in tree
Previously the `cargotest` suite would run some arbitrary revision of Cargo's
test suite, but now that we're bundling it in tree we should be running the
Cargo submodule's test suite instead.
Auto merge of #41408 - eddyb:poly-const-eval, r=arielb1
rustc: generalize monomorphic_const_eval to polymorphic constants.
With the addition of `Substs` to the query key, we can now evaluate *and cache* polymorphic constants.
Fixes #23898 by replacing the crippled explicit-discriminant-only local-crate-only `lookup_variant_by_id` with `ConstVal::Variant` which can describe variants irrespective of their discriminant.
Fixes #41394 by fixing #23898 (for the original testcase) and by not looping past the first discriminant.
this avoids parsing item attributes on each call to `item_attrs`, which takes
off 33% (!) of translation time and 50% (!) of trans-item collection time.
That method is *incredibly* hot, so this ends up saving 10% of trans
time.
BTW, we really should be doing dependency tracking there - and possibly be
taking the respective perf hit (got to find a way to make DTMs fast), but
`layout_cache` is a non-dep-tracking map.
Rollup merge of #41355 - nikomatsakis:incr-comp-refactor-trans-2, r=eddyb
Refactor trans some more to pave way for incremental compilation
Various refactorings paving the way for the newer approach to incremental compilation (And, in particular, to "query-ifying" trans). My partial goal is to remove `SharedCrateContext`; this PR gets about as far as I can easily get before starting to really want the red/green algorithm.
Auto merge of #39999 - bitshifter:struct_align, r=eddyb
Implementation of repr struct alignment RFC 1358.
The main changes around rustc::ty::Layout::struct:
* Added abi_align field which stores abi alignment before repr align is applied
* align field contains transitive repr alignment
* Added padding vec which stores padding required after fields
The main user of this information is rustc_trans::adt::struct_llfields
which determines the LLVM fields to be used by LLVM, including padding
fields.
A possible future optimisation would be to put the padding Vec in an Option, since it will be unused unless you are using repr align.