[PATCH] D49517: [WebAssembly] Handle return type conversions in FixFunctionBitcasts pass

[Sam Clegg via Phabricator via llvm-commits]

sbc100 added a comment.

My goal here is not so much to make it "work" as to not produce invalid webassembly.     i.e. it should compile, even it if fails at runtime to do anything useful/expected.

The motivating use case is the way 'cmake' detects functions: https://github.com/Kitware/CMake/blob/master/Modules/CheckFunctionExists.c

I tries to compile this little program (but not run it) where the function in question is declared as "int XXX()" regardless of the actual signature.  This fails when detecting, for example `strtod` becasue the resulting wasm binary doesn't validate (which means wasm-emscripten-finalize can't load it which mean a link failure for emccc).


Repository:
  rL LLVM

https://reviews.llvm.org/D49517