Commits on Oct 31, 2024

1. 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](rust-lang#127731 (comment))
   for more discussion.
   
   Part of rust-lang#116558

   

   veluca93 committed Oct 31, 2024
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