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

[Derek Schuff via llvm-commits]

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dschuff wrote:

To be clear I think the `-DiPTR` trick is definitely nicer, but it can't be used on the IR input itself. I was thinking that the sed transform would also modify the test expectations too but you're right  to do that you'd need to run it on the FileCheck input separately (or run the substitution into a temporary file and use that as the input to both llc and FIleCheck). Actually maybe that's better anyway, since if there's a failure the file will still be there and you can reproduce the failure without having to run sed.

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