fix

fix

Remove more refs and clones

fix

more

fix

This deduplicates logic between codegen backends

The new implementation allows some `memcpy`s to be optimized away,
so the uninit value in ui/sanitize/memory.rs is constructed directly
onto the return place. Therefore the sanitizer now says that the
value is allocated by `main` rather than `random`.

Consider all fields when comparing DllImports, to remove nondetermininsm in multiple-definitions test

<https://docs.rs/cranelift-codegen/0.74.0/cranelift_codegen/ir/types/struct.Type.html#method.int>

It is already part of CodegenResults

The information is stored in used_crate_source too anyway

This passed x.py check locally, not sure why it wasn't rebased right...

Note that this breaks Miri.

Closes #79601

This does not yet support #[link_name] attributes on functions, the #[link_ordinal]
attribute, #[link(kind = "raw-dylib")] on extern blocks in bin crates, or
stdcall functions on 32-bit x86.

Both cg_llvm and cg_clif don't override it. cg_spirv does override it,
so it needs to be preserved.