[compiler-rt] [llvm] [WebAssembly] Explicitly set `getCmpLibcallReturnType` to i32 (PR #192425)

[Trevor Gross via llvm-commits]

tgross35 wrote:

> Any idea why this hasn't shown up already, for example, in emscripten?

@Spxg pointed out in https://github.com/rust-lang/compiler-builtins/issues/1199 that emscripten's fork of compiler-rt is patching for this https://github.com/emscripten-core/emscripten/blob/88e0002141254cdb772b558f63d2c1ad9b215eb2/system/lib/compiler-rt/lib/builtins/fp_compare_impl.inc#L15.

https://github.com/llvm/llvm-project/pull/192425