Rollup of 8 pull requests #74667
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Rollup of 8 pull requests #74667
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Now that rust-lang#74163 updated the minimum Linux kernel to 2.6.32, we can assume the availability of APIs that open file descriptors that are already set to close on exec, including the flags `O_CLOEXEC`, `SOCK_CLOEXEC`, and `F_DUPFD_CLOEXEC`.
as if this is currently possible. HA!
This commit improves codegen for unchecked casts on WebAssembly targets
to use the singluar `iNN.trunc_fMM_{u,s}` instructions. Previously rustc
would codegen a bare `fptosi` and `fptoui` for float casts but for
WebAssembly targets the codegen for these instructions is quite large.
This large codegen is due to the fact that LLVM can speculate these
instructions so the trapping behavior of WebAssembly needs to be
protected against in case they're speculated.
The change here is to update the codegen for the unchecked cast
intrinsics to have a wasm-specific case where they call the appropriate
LLVM intrinsic to generate the right wasm instruction. The intrinsic is
explicitly opting-in to undefined behavior so a trap here for
out-of-bounds inputs on wasm should be acceptable.
cc rust-lang#73591
Co-authored-by: David Tolnay <dtolnay@gmail.com>
Co-authored-by: varkor <github@varkor.com>
libstd/libcore: fix various typos
add a Backtrace::disabled function Based upon @dtolnay's suggestion here: dtolnay/anyhow#97 (comment)
one more Path::with_extension example, to demonstrate behavior
Prefer constant over function Just that I prefer constants over functions that can be made const.
Remove Linux workarounds for missing CLOEXEC support Now that rust-lang#74163 updated the minimum Linux kernel to 2.6.32, we can assume the availability of APIs that open file descriptors that are already set to close on exec, including the flags `O_CLOEXEC`, `SOCK_CLOEXEC`, and `F_DUPFD_CLOEXEC`. Closes rust-lang#74519.
Make str point to primitive page Currently str in String page points to str module page.
require type defaults to be after const generic parameters From current discussions it seems like the goal here is for type and const parameters to be unordered and allow things like `struct Foo<const N: usize, T = u32>(T)` and `struct Foo<T, const N: usize = 7>` this way. Note: This means that using `min_const_generics` it will not be possible for an adt to have both type defaults and const parameters. closes rust-lang#70471 r? @varkor @eddyb
Improve codegen for unchecked float casts on wasm
This commit improves codegen for unchecked casts on WebAssembly targets
to use the singluar `iNN.trunc_fMM_{u,s}` instructions. Previously rustc
would codegen a bare `fptosi` and `fptoui` for float casts but for
WebAssembly targets the codegen for these instructions is quite large.
This large codegen is due to the fact that LLVM can speculate these
instructions so the trapping behavior of WebAssembly needs to be
protected against in case they're speculated.
The change here is to update the codegen for the unchecked cast
intrinsics to have a wasm-specific case where they call the appropriate
LLVM intrinsic to generate the right wasm instruction. The intrinsic is
explicitly opting-in to undefined behavior so a trap here for
out-of-bounds inputs on wasm should be acceptable.
cc rust-lang#73591
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r? @ghost