[llvm] [WebAssembly][FastISel] Emit signed loads for sext of i8/i16/i32 (PR #182767)

[Sam Clegg via llvm-commits]

sbc100 wrote:

I attached the pre-processed source as out.c.

You can repro using `$ ../llvm-build/bin/clang  -target wasm32-unknown-emscripten -c out.c`

[out.c](https://github.com/user-attachments/files/25687991/out.c)


https://github.com/llvm/llvm-project/pull/182767