Introduce assembly tests suite
The change introduces a new test suite - **Assembly** tests. The motivation behind this is an ability to perform end-to-end codegen testing with LLVM backend. Turned out, NVPTX backend sometimes missing common Rust features (`i128` and libcalls in the past, and still full atomics support) due to different reasons.
Prior to this change, basic NVPTX assembly tests were implemented within `run-make` suite. Now, it's easier to write additional and maintain existing tests for the target.
cc @gnzlbg @peterhj
cc @eddyb I adjusted mangling scheme expectation, so there is no need to change the tests for #57967
Keep last redundant linker flag, not first
When a library (L1) is passed to the linker multiple times, this is sometimes purposeful: there might be several other libraries in the linker command (L2 and L3) that all depend on L1. You'd end up with a (simplified) linker command that looks like:
```
-l2 -l1 -l3 -l1
```
With the previous behavior, when rustc encountered a redundant library, it would keep the first instance, and remove the later ones, resulting in:
```
-l2 -l1 -l3
```
This can cause a linker error, because on some platforms (e.g. Linux), the linker will only include symbols from L1 that are needed *at the point it's referenced in the command line*. So if L3 depends on additional symbols from L1, which aren't needed by L2, the linker won't know to include them, and you'll end up with "undefined symbols" errors.
A better behavior is to keep the *last* instance of the library:
```
-l2 -l3 -l1
```
This ensures that all "downstream" libraries have been included in the linker command before the "upstream" library is referenced.
Fixes rust-lang#47989
Rollup of 5 pull requests (all of which changes `src/ci/docker`)
Successful merges:
- #58986 ([CI] Update binutils for powerpc64 and powerpc64le)
- #59038 (Track embedded-book in the toolstate)
- #59055 (CI: Set job names.)
- #59253 (Calculate Docker cache hash precisely from Dockerfile's dependencies)
- #59257 (Update CI configuration for building Redox libraries)
Failed merges:
r? @ghost
Calculate Docker cache hash precisely from Dockerfile's dependencies
#58549 changed the Docker cache calculation to include every file under `src/ci/docker`, so that when files under `dist-x86_64-linux` is changed, its dependent image `dist-i686-linux` will also be rebuilt.
However, this ultraconservative solution caused the `dist-i686-linux` to be rebuilt every time an irrelevant Dockerfile (e.g. the PowerPC ones) is changed, which increases the building time beyond 3 hours and forcing a spurious but expected failure.
This commit instead parses the Dockerfile itself and look for the actual dependencies. The scripts needs to be copied into the Docker image, which must be done with the COPY command, so we just need to find all lines with a COPY command and add the source file into the hash calculator.
Note: this script only handles single-lined COPY command in the form `COPY src1 src2 src3 dst`, since these are the only variant used inside this repository.
CI: Set job names.
This should make it easier to identify what each job is doing when looking at the Travis or Appveyor UI.
- Set `name` for each job in Travis.
- Move `CI_JOB_NAME` to the front in Appveyor so that it appears first in the UI.
Track embedded-book in the toolstate
The embedded book was tested in the tools job but the test result was never published. This PR adds maintainer information of embedded-book. This PR also requires the next update to embedded-book to pass the all tests, currently its state is test-fail.
rust-lang-nursery/rust-toolstate#10 should be merged before this PR.
[CI] Update binutils for powerpc64 and powerpc64le
Cargo powerpc64 and powerpc64le are seeing `SIGILL` crashes in openssl,
which was found to be a linking problem, fixed by newer binutils. See
<https://github.com/rust-lang/rust/issues/57345#issuecomment-462094555>
For powerpc64 we're using crosstool-ng, which doesn't offer a newer
binutils version, but we can just compile it separately. On powerpc64le
we're already building binutils. Both are now updated to binutils 2.32.
Closesrust-lang/cargo#6320Closesrust-lang/rust#57345Closesrust-lang/rustup.rs#1620
r? @alexcrichton
This commit fixes what is believed to be a preexisting bug in the linker
flavor inference and additionally adds a new features. Previously if the
linker didn't end in `exe` the entire file name was compared to infer
the linker's flavor. This commit fixes the code to instead
unconditionally inspect `file_stem()` which is the relevant part we're
looking at to figure out what the linker flavor is.
Additionally this commit now also adds recognition of `clang` and clang
wrappers that end in `-clang` (which look like gcc wrappers). This
should allow clang-specific wrappers to get correctly inferred to the
`Gcc` linker flavor rather than the default linker flavor configured for
a target.
Rollup of 11 pull requests
Successful merges:
- #56348 (Add todo!() macro)
- #57729 (extra testing of how NLL handles wildcard type `_`)
- #57847 (dbg!() without parameters)
- #58778 (Implement ExactSizeIterator for ToLowercase and ToUppercase)
- #58812 (Clarify distinction between floor() and trunc())
- #58939 (Fix a tiny error in documentation of std::pin.)
- #59116 (Be more discerning on when to attempt suggesting a comma in a macro invocation)
- #59252 (add self to mailmap)
- #59275 (Replaced self-reflective explicit types with clearer `Self` or `Self::…` in stdlib docs)
- #59280 (Stabilize refcell_map_split feature)
- #59290 (Run branch cleanup after copy prop)
Failed merges:
r? @ghost
Replaced self-reflective explicit types with clearer `Self` or `Self::…` in stdlib docs
Many docs examples use explicit types instead of the semantically more clear `Self`/`Self::…` aliases.
By using the latter it's clear that the value's type depends on either `Self`, or an associated type of `Self`, instead of some constant type. It's also more consistent (and I'd argue correct), as the current docs aren't really consistent in this, as can be seen from the diff.
This is a best effort PR, as I was basically going through the docs manually, looking for offending examples. I'm sure I missed a few. Gotta start somewhere.
