rust/compiler/rustc_monomorphize
bors 7660aed73d Auto merge of #132173 - veluca93:abi_checks, r=RalfJung,compiler-errors
Emit warning when calling/declaring functions with unavailable vectors.

On some architectures, vector types may have a different ABI depending on whether the relevant target features are enabled. (The ABI when the feature is disabled is often not specified, but LLVM implements some de-facto ABI.)

As discussed in rust-lang/lang-team#235, this turns out to very easily lead to unsound code.

This commit makes it a post-monomorphization future-incompat warning to declare or call functions using those vector types in a context in which the corresponding target features are disabled, if using an ABI for which the difference is relevant. This ensures that these functions are always called with a consistent ABI.

See the [nomination comment](https://github.com/rust-lang/rust/pull/127731#issuecomment-2288558187) for more discussion.

Part of #116558

r? RalfJung
2024-11-10 02:52:25 +00:00
..
src Auto merge of #132173 - veluca93:abi_checks, r=RalfJung,compiler-errors 2024-11-10 02:52:25 +00:00
Cargo.toml compiler: Add rustc_abi to _monomorphize 2024-11-02 20:31:47 -07:00
messages.ftl Emit warning when calling/declaring functions with unavailable vectors. 2024-11-01 22:24:35 +01:00