[llvm-branch-commits] [lld] [llvm] Backport fixes for ARM64EC import libraries (PR #84590)

[Jacek Caban via llvm-branch-commits]

cjacek wrote:

It's great to hear that it's enough got Rust. I re-reviewed those commits for impact on non-ARM64EC target and I think it's safe enough.

One thing we could consider is to skip .def file parser part of it. The main downside of it would be that it would require skipping some tests too. Other than than that, it's unlikely to matter and I think that Rust calls `writeImportLibrary` directly anyway.

https://github.com/llvm/llvm-project/pull/84590