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authorbors <bors@rust-lang.org>2021-12-24 01:54:56 +0000
committerbors <bors@rust-lang.org>2021-12-24 01:54:56 +0000
commite6f1f04e5215124244dfc87a5f9867580bf9386b (patch)
tree198188ae541b02f37431db7097b2ac0cca8f7e90 /compiler/rustc_codegen_llvm/src/llvm/mod.rs
parentd6d12b6a5d2c2906ef4e85ce1d50a8684cf43626 (diff)
parent8217138f445e128f3bd4e4f517ac989d2abb621f (diff)
downloadrust-e6f1f04e5215124244dfc87a5f9867580bf9386b.tar.gz
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Auto merge of #92220 - nnethercote:RawVec-dont-recompute-capacity, r=joshtriplett
RawVec: don't recompute capacity after allocating.

Currently it sets the capacity to `ptr.len() / mem::size_of::<T>()`
after any buffer allocation/reallocation. This would be useful if
allocators ever returned a `NonNull<[u8]>` with a size larger than
requested. But this never happens, so it's not useful.

Removing this slightly reduces the size of generated LLVM IR, and
slightly speeds up the hot path of `RawVec` growth.

r? `@ghost`
Diffstat (limited to 'compiler/rustc_codegen_llvm/src/llvm/mod.rs')
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