[clang] [llvm] [WebAssembly] Change to 64-bit table indices on Wasm64 (PR #180649)

[Sam Clegg via cfe-commits]

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sbc100 wrote:

It seems like we could just test the llc -> asm here couldn't we?  i.e. move this test to the CodeGen directory and CHECK the correct asm is generated?

Or is there some reason we need to test the whole llc -> object file path specifically in this case.

If there are existing `.ll` files in this directory that is either (a) a mistake, or perhaps a historical accident that needs cleaning up or (b) perhaps a special case where the whole pipeline really needs to be tested together (I can't think of specific examples of this but I would imagine its conceivable).

https://github.com/llvm/llvm-project/pull/180649