[clang] [lldb] [WebAssembly][Clang] Give wasm tables their own type in clang AST (PR #205817)

[Hood Chatham via cfe-commits]

hoodmane wrote:

Currently in IR they are a `ptr addrspace(1)`. I guess `type target("wasm.table.externref")` could make more sense?

https://github.com/llvm/llvm-project/pull/205817