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Refactor rustc_codegen_ssa
cc #56108 (not all things are done yet)
This removes an unsafe method from cg_ssa.
r? @eddyb
cc @sunfishcode
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Clean up and streamline the pretty-printer
Some minor improvements.
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(compiler front-ends).
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`Printer::word` takes a `&str` and converts it into a `String`, which
causes an allocation. But that allocation is rarely necessary, because
`&str` is almost always a `&'static str` or a `String` that won't be
used again.
This commit changes `Token::String` so it holds a `Cow<'static, str>`
instead of a `String`, which avoids a lot of allocations.
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fix various typos in doc comments
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Don't print opt fuel messages to stdout because it breaks Rustbuild
Rustbuild passes `--message-format json` to the compiler invocations
which causes JSON to be emitted on stdout. Printing optimization fuel
messages to stdout breaks the json and causes Rustbuild to fail.
Work around this by emitting optimization fuel related messages on
stderr instead.
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Add support for bound types
This PR may have some slight performance impacts, I don't know how hot is the code I touched.
Also, this breaks clippy and miri.
r? @nikomatsakis
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This commit adds opt-in support to the compiler to link to `jemalloc` in
the compiler. When activated the compiler will depend on `jemalloc-sys`,
instruct jemalloc to unprefix its symbols, and then link to it. The
feature is activated by default on Linux/OSX compilers for x86_64/i686
platforms, and it's not enabled anywhere else for now. We may be able to
opt-in other platforms in the future! Also note that the opt-in only
happens on CI, it's otherwise unconditionally turned off by default.
Closes #36963
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Rustbuild passes `--message-format json` to the compiler invocations
which causes JSON to be emitted on stdout. Printing optimization fuel
messages to stdout breaks the json and causes Rustbuild to fail.
Work around this by emitting optimization fuel related messages on
stderr instead.
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resolve: Scale back hard-coded extern prelude additions on 2015 edition
https://github.com/rust-lang/rust/pull/54404 stabilized `feature(extern_prelude)` on 2015 edition, including the hard-coded parts not passed with `--extern`.
First of all, I'd want to confirm that this is intended stabilization, rather than a part of the "extended beta" scheme that's going to be reverted before releasing stable.
(EDIT: to clarify - this is a question, I'm \*asking\* for confirmation, rather than give it.)
Second, on 2015 edition extern prelude is not so fundamentally tied to imports and is a mere convenience, so this PR scales them back to the uncontroversial subset.
The "uncontroversial subset" means that if libcore is injected it brings `core` into prelude, if libstd is injected it brings `std` and `core` into prelude.
On 2015 edition this can be implemented through the library prelude (rather than hard-coding in the compiler) right now, I'll do it in a follow-up PR.
UPDATE: The change is done for both 2015 and 2018 editions now as discussed below.
Closes https://github.com/rust-lang/rust/issues/53166
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Cleanup rustc/driver
- improve/remove allocations
- simplify `profile::trace::cons*`
- don't sort `base` if it only has one element
- use `Cow<str>` where applicable
- use `unwrap_or_else` with function calls
- remove an explicit `return`, add an explicit `None`
- remove lifetimes from `const`s
- improve common patterns
- improve macro calls
- whitespace & formatting fixes
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Otherwise, custom drivers will have to use their own copy of `getopts`, which
won't match the types used in `CompilerCalls`.
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Bump to 1.31.0 and bootstrap from 1.30 beta
Closes #54594.
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Suggest valid crate type if invalid crate type is found
This adds a suggestion to the `invalid_crate_types` lint.
The suggestion is based on the Levenshtein distance to existing crate
types. If no suggestion is found it will show the lint without any
suggestions.
Closes #53958
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Rename all mentions of `nil` to `unit`
Fixes #53719.
Renamed keywords nil to unit.
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This adds a suggestion to the `invalid_crate_types` lint.
The suggestion is based on the Levenshtein distance to existing crate
types. If no suggestion is found it will show the lint without any
suggestions.
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Co-authored-by: nikomatsakis
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This reverts commit 69deed9dc17cfd1c3e02d9e662ebc164885321a6.
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