[llvm] [WebAssembly] Implement lowering calls through funcref to call_ref when available (PR #162227)

[Demetrius Kanios via llvm-commits]

QuantumSegfault wrote:

> What's the use case for this? Same application you mentioned in #155880 ?

No. I have no concrete need or use case for this right now.

It's just something I noticed as I was building up GlobalISel. Since WasmGC is now part of the core spec (wasm 3.0), and the foundation was already put in place #147486, I saw no reason not to make the improvement.

https://github.com/llvm/llvm-project/pull/162227