rust/library/alloc
Augie Fackler 130a1df71e codegen: use new {re,de,}allocator annotations in llvm
This obviates the patch that teaches LLVM internals about
_rust_{re,de}alloc functions by putting annotations directly in the IR
for the optimizer.

The sole test change is required to anchor FileCheck to the body of the
`box_uninitialized` method, so it doesn't see the `allocalign` on
`__rust_alloc` and get mad about the string `alloca` showing up. Since I
was there anyway, I added some checks on the attributes to prove the
right attributes got set.

While we're here, we also emit allocator attributes on
__rust_alloc_zeroed. This should allow LLVM to perform more
optimizations for zeroed blocks, and probably fixes #90032. [This
comment](https://github.com/rust-lang/rust/issues/24194#issuecomment-308791157)
mentions "weird UB-like behaviour with bitvec iterators in
rustc_data_structures" so we may need to back this change out if things
go wrong.

The new test cases require LLVM 15, so we copy them into LLVM
14-supporting versions, which we can delete when we drop LLVM 14.
2022-07-26 09:43:28 -04:00
..
benches Add VecDeque::extend TrustedLen benchmark 2022-06-17 23:41:03 +02:00
src codegen: use new {re,de,}allocator annotations in llvm 2022-07-26 09:43:28 -04:00
tests Stabilize core::ffi::CStr, alloc::ffi::CString, and friends 2022-07-15 03:10:35 -07:00
Cargo.toml Switch all libraries to the 2021 edition 2021-12-23 19:03:47 +08:00