Rollup of 25 pull requests #44623
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Rollup of 25 pull requests #44623
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Implement downcast the like it exists for Box. The implementation avoids using into_raw/from_raw, because the pointer arithmetic which should cancel does not seem to optimize out at the moment. Since Rc<T> is never Send, only Rc<Any> and not Rc<Any + Send> implements downcast.
On Windows, the gcc crate would send /Wall to msvc, which would cause builds to get flooded with warnings, exploding compile times from one hour to more than 72! The gcc crate version 0.3.54 changes this behavior to send /W4 instead, which greatly cuts down on cl.exe flooding the command prompt window with warnings.
In rust-lang#42436 the behavior for spawning processes on Windows was tweaked slightly to fix various bugs, but this caused rust-lang#42791 as a regression, namely that to spawn batch scripts they need to be manually spawned with `cmd /c` instead now. This updates the compiler to handle this case explicitly for Emscripten. Closes rust-lang#42791
Removing unwanted file merged in a previous commit
Most of the other rust-lang buckets are in us-west-1 and I think the original bucket was just accidentally created in the us-east-1 region. Let's consolidate by moving it to the same location as the rest of our buckets.
`FlatMap` can use internal iteration for its `fold`, which shows a
performance advantage in the new benchmarks:
test iter::bench_flat_map_chain_ref_sum ... bench: 4,354,111 ns/iter (+/- 108,871)
test iter::bench_flat_map_chain_sum ... bench: 468,167 ns/iter (+/- 2,274)
test iter::bench_flat_map_ref_sum ... bench: 449,616 ns/iter (+/- 6,257)
test iter::bench_flat_map_sum ... bench: 348,010 ns/iter (+/- 1,227)
... where the "ref" benches are using `by_ref()` that isn't optimized.
So this change shows a decent advantage on its own, but much more when
combined with a `chain` iterator that also optimizes `fold`.
This commit alters the `query` function in the dep graph module to preallocate memory using `with_capacity` instead of relying on automatic growth. Discovered in rust-lang#44576 it was found that for the syntex_syntax clean incremental benchmark the peak memory usage was found when the dep graph was being saved, particularly the `DepGraphQuery` data structure itself. PRs like rust-lang#44142 which add more queries end up just making this much larger! I didn't see an immediately obvious way to reduce the size of the `DepGraphQuery` object, but it turns out that `with_capacity` helps quite a bit! Locally 831 MB was used [before] this commit, and 770 MB is in use at the peak of the compiler [after] this commit. That's a nice 7.5% improvement! This won't quite make up for the losses in rust-lang#44142 but I figured it's a good start. [before]: https://gist.github.com/alexcrichton/2d2b9c7a65503761925c5a0bcfeb0d1e [before]: https://gist.github.com/alexcrichton/6da51f2a6184bfb81694cc44f06deb5b
extend E0623 for earlybound and latebound for structs This fixes rust-lang#44508 r? @nikomatsakis
bring TyCtxt into scope got comments both from @eddyb and @nikomatsakis (via rust-lang#44505) that we should always put `TyCtxt` in scope should I just go and import it at other places in the codebase or we just keep doing small improvements?
rustdoc: pretty-print Unevaluated expressions in types. Fixes rust-lang#44555. r? @nikomatsakis
… r=alexcrichton stabilized iterator_for_each (closes rust-lang#42986) Also updated clippy and rls as these use the iterator_for_each I've made my first PR's today so most likely I've done something wrong. Sorry about that!
…aidanhs travis: Move sccache to the us-west-1 region Most of the other rust-lang buckets are in us-west-1 and I think the original bucket was just accidentally created in the us-east-1 region. Let's consolidate by moving it to the same location as the rest of our buckets.
Customize `<FlatMap as Iterator>::fold`
`FlatMap` can use internal iteration for its `fold`, which shows a
performance advantage in the new benchmarks:
test iter::bench_flat_map_chain_ref_sum ... bench: 4,354,111 ns/iter (+/- 108,871)
test iter::bench_flat_map_chain_sum ... bench: 468,167 ns/iter (+/- 2,274)
test iter::bench_flat_map_ref_sum ... bench: 449,616 ns/iter (+/- 6,257)
test iter::bench_flat_map_sum ... bench: 348,010 ns/iter (+/- 1,227)
... where the "ref" benches are using `by_ref()` that isn't optimized.
So this change shows a decent advantage on its own, but much more when
combined with a `chain` iterator that also optimizes `fold`.
…elwoerister rustc: Preallocate when building the dep graph This commit alters the `query` function in the dep graph module to preallocate memory using `with_capacity` instead of relying on automatic growth. Discovered in rust-lang#44576 it was found that for the syntex_syntax clean incremental benchmark the peak memory usage was found when the dep graph was being saved, particularly the `DepGraphQuery` data structure itself. PRs like rust-lang#44142 which add more queries end up just making this much larger! I didn't see an immediately obvious way to reduce the size of the `DepGraphQuery` object, but it turns out that `with_capacity` helps quite a bit! Locally 831 MB was used [before] this commit, and 770 MB is in use at the peak of the compiler [after] this commit. That's a nice 7.5% improvement! This won't quite make up for the losses in rust-lang#44142 but I figured it's a good start. [before]: https://gist.github.com/alexcrichton/2d2b9c7a65503761925c5a0bcfeb0d1e [before]: https://gist.github.com/alexcrichton/6da51f2a6184bfb81694cc44f06deb5b
Require +thumb-mode to generate thumb2 code for Android/armv7-a I am investigating rust's code generation into Gecko by https://bugzilla.mozilla.org/show_bug.cgi?id=1399337. armv7-linux-androideabi target uses `+v7,+thumb2,+vfp3,+d16,-neon` as target-feature. But `+thumb2` only doesn't generate thumb2 code. To generate thumb2 code, it requires `+thumb-mode`. So we should add it for armv7-linux-androideabi. r? @alexcrichton
…=eddyb Get `allow(unused_mut)` to work on `let` bindings fixes rust-lang#40491
…xcrichton stabilized ord_max_min (fixes rust-lang#25663)
update rust-installer Fixes <rust-lang#44594> r? @alexcrichton
Add Stylo and WebRender to src/tools/cargotest This is a subset of Servo that takes relatively less time to compile and does not use unstable Rust features.
…imulacrum Update cargo submodule Just a routine update
…imulacrum rustbuild: Update `cmake` dependency Should help suppress some warnings from various repos as `cmake` in the newest version disables warnings by default.
Mention that HashMap::new and HashSet::new do not allocate The docs for `HashMap::with_capacity` and `HashSet::with_capacity` already say that > If `capacity` is 0, the hash map/set will not allocate. However, the docs for `::new` do not say that the initial capacity is 0, and thus promise that a call to `::new` alone does not allocate. This PR fixes that.
…, r=Mark-Simulacrum rustbuild: Fix test "test rustdoc" invocation Previously it would use the librustc output directory which would cause rustdoc to get entirely recompiled, whereas the intention is that it uses the already-compiled artifacts from building rustdoc itself, using the tool output directory
…uietMisdreavus Fix incorrect `into_inner` link in docs. Fixes rust-lang#42373.
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Some changes occurred in HTML/CSS. |
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r? @arielb1 (rust_highfive has picked a reviewer for you, use r? to override) |
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@bors r+ p=10 |
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📌 Commit 78ef3fe has been approved by |
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⌛ Testing commit 78ef3fe with merge d4dfec1af0424d51111664dc110bdab0ae544973... |
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💔 Test failed - status-appveyor |
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☔ The latest upstream changes (presumably #43017) made this pull request unmergeable. Please resolve the merge conflicts. |
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align_offsetthings #44537, rustc: Spawncmd /c emcc.batexplicitly #44542, extend E0623 for earlybound and latebound for structs #44549, bring TyCtxt into scope #44560, rustdoc: pretty-print Unevaluated expressions in types. #44562, stabilized iterator_for_each (closes #42986) #44567, travis: Move sccache to the us-west-1 region #44574, Customize<FlatMap as Iterator>::fold#44577, rustc: Preallocate when building the dep graph #44586, Require +thumb-mode to generate thumb2 code for Android/armv7-a #44589, Getallow(unused_mut)to work onletbindings #44590, stabilized ord_max_min (fixes #25663) #44593, update rust-installer #44598, Add Stylo and WebRender to src/tools/cargotest #44603, Update cargo submodule #44604, rustbuild: Updatecmakedependency #44606, Mention that HashMap::new and HashSet::new do not allocate #44609, rustbuild: Fix test "test rustdoc" invocation #44616, Fix incorrectinto_innerlink in docs. #44622