Move Generics from MethodSig to TraitItem and ImplItem
As part of `rust-impl-period/WG-compiler-traits`, we want to "lift" `Generics` from `MethodSig` into `TraitItem` and `ImplItem`. This is in preparation for adding associated type generics. (https://github.com/rust-lang/rust/issues/44265#issuecomment-331172238)
Currently this change is only made in the AST. In the future, it may also impact the HIR. (Still discussing)
To understand this PR, it's probably best to start from the changes to `ast.rs` and then work your way to the other files to understand the far reaching effects of this change.
r? @nikomatsakis
Now that we are visiting things in a different order during lowering,
adding parameters winds up affecting the HirIds assigned to thinks in
the method body, whereas it didn't before. We could fix this by
reordering the order in which we visit `generics` during lowering, but
this feels very fragile. Seems better to just let typeck tables be
dirty here.
Fix rustbuild --color conflict when building on Travis outside of Docker
When trying to build rust on Travis without using `stamp` or `docker`, both `RUSTC_COLOR=1` and `TRAVIS=true` will separately pass `--color always` to the command line. This causes the build to fail due to "*Option 'color' given more than once*".
In this PR, the `RUSTC_COLOR=1` will not be passed in the CI environment.
rustbuild: Build stage 1 error index generator at stage 0
At stage 1 rustdoc is built at stage 0 so the error index generator should be as well.
This fixes `x.py --stage 1 doc` as rustdoc doesn't even build at stage 1.
It was broken by #44605.
r? @alexcrichton
update jobserver version to work around macos bug
Update `jobserver` crate to fixrust-lang/cargo#4643, a panic which can't happen according to `libc::poll`'s man page but was nevertheless reported on macOS 10.9 and 10.10.
r? @alexcrichton
rustbuild: Compile rustc with ThinLTO
This commit enables ThinLTO for the compiler as well as multiple codegen units.
This is intended to get the benefits of parallel codegen while also avoiding
any major loss of perf. Finally this commit is also intended as further testing
for #45320 and shaking out bugs.
rustc: Move bytecode compression into codegen
This commit moves compression of the bytecode from the `link` module to the
`write` module, namely allowing it to be (a) cached by incremental compilation
and (b) produced in parallel. The parallelization may show up as some nice wins
during normal compilation and the caching in incremental mode should be
beneficial for incremental compiles! (no more need to recompress the entire
crate's bitcode on all builds)
This commit moves compression of the bytecode from the `link` module to the
`write` module, namely allowing it to be (a) cached by incremental compilation
and (b) produced in parallel. The parallelization may show up as some nice wins
during normal compilation and the caching in incremental mode should be
beneficial for incremental compiles! (no more need to recompress the entire
crate's bitcode on all builds)
ci: Update musl with new release
Apparently there's at least one CVE fixed in the new version of musl, and
because we're distributing it seems like a good opportunity to update!
Unfortunately it looks like #38618 still hasn't been fixed.
rustbuild: Don't try to build rustdoc API docs with compiler docs
rustdoc is built separately to rustc now so the docs would need to be
generated separately as well. Also rustdoc doesn't build at stage 1
which prevented the compiler docs being built at stage 1.
Fixes: #44629
At stage 1 rustdoc is built at stage 0 so the error index generator should be as well.
This fixes `x.py --stage 1 doc` as rustdoc doesn't even build at stage 1.
Reactivate clippy in toolstate.toml
The `Cargo.lock` changes are b/c clippy is not its own workspace anymore, but is part of the main workspace
r? @Manishearth
std: Update randomness implementation on Windows
This commit updates the OS random number generator on Windows to match the
upstream implementation in the `rand` crate. First proposed in
rust-lang-nursery/rand#111 this implementation uses a "private" API of
`RtlGenRandom`. Despite the [documentation][dox] indicating this is a private
function its widespread use in Chromium and Firefox as well as [comments] from
Microsoft internally indicates that it's highly unlikely to break.
Another motivation for switching this is to also attempt to make progress
on #44911. It may be the case that this function succeeds while the previous
implementation may fail in "weird" scenarios.
[dox]: https://msdn.microsoft.com/en-us/library/windows/desktop/aa387694(v=vs.85).aspx
[comments]: https://github.com/rust-lang-nursery/rand/issues/111#issuecomment-316140155
rustc: Add `_imp_` symbols later in compilation
On MSVC targets rustc will add symbols prefixed with `_imp_` to LLVM modules to
"emulate" dllexported statics as that workaround is still in place after #27438
hasn't been solved otherwise. These statics, however, were getting gc'd by
ThinLTO accidentally which later would cause linking failures.
This commit updates the location we add such symbols to happen just before
codegen to ensure that (a) they're not eliminated by the optimizer and (b) the
optimizer doesn't even worry about them.
Closes#45347
This commit enables ThinLTO for the compiler as well as multiple codegen units.
This is intended to get the benefits of parallel codegen while also avoiding
any major loss of perf. Finally this commit is also intended as further testing
for #45320 and shaking out bugs.
Make sure to clear out the stageN-{rustc,std,tools} directories.
We copy built tool binaries into a dedicated directory to avoid deleting them,
stageN-tools-bin. These aren't ever cleared out by code, since there should be
no reason to do so, and we'll simply overwrite them as necessary.
When clearing out the stageN-{std,rustc,tools} directories, make sure to delete
both Cargo directories -- per-target and build scripts. This ensures that
changing libstd doesn't cause problems due to build scripts not being rebuilt,
even though they should be.
Fixes https://github.com/rust-lang/rust/issues/44739.
incr.comp.: Use 128bit SipHash for fingerprinting
This PR switches incr. comp. result fingerprinting from 128 bit BLAKE2 to 128 bit SipHash. When we started using BLAKE2 for fingerprinting, the 128 bit version of SipHash was still experimental. Now that it isn't anymore we should be able to get a nice performance boost without significantly increasing collision probability.
~~I'm going to start a try-build for this, so we can gauge the performance impact before merging (hence the `WIP` in the title).~~
EDIT: Performance improvements look as expected. Tests seem to be passing.
Fixes#41215.
Mark block exits as reachable if the block can break.
This only happens when desugaring `catch` expressions for now, but regular blocks (in HIR) can be broken from - respect that when doing reachability analysis.
Fixes#45124.
Refactor `ensure` and `try_get_with`
There was a bit of code shared between `try_get_with` and `ensure`, after I
added `ensure`. I refactored that shared code into a query-agnostic method
called `read_node_index`.
The new method `read_node_index` will attempt to find the node
index (`DepNodeIndex`) of a query. When `read_node_index` finds the
`DepNodeIndex`, it marks the current query as a reader of the node it's
requesting the index of.
This is used by `try_get_with` and `ensure` as it elides the unimportant (to
them) details of if the query is invalidated by previous changed computation (Red)
or new and if they had to mark the query green. For both `try_get_with` and
`ensure`, they just need to know if they can lookup the results or have to
reevaluate.
@nikomatsakis this is the [refactor we discussed](https://github.com/rust-lang/rust/pull/45228#discussion_r144577392) in the comment thread of #45228
