The compiler gods have added the llvm-mos C compiler to the Compiler Explorer at godbolt.org.

This means that you can experiment with llvm-mos 6502 codegen without installing anything locally.

Here's an example of llvm-mos running a compile-time calculation in C:

https://godbolt.org/z/5xer5nYsE

And here's an example of code running on an emulated NES (click on the popup in the lower right corner to watch the emulation run):

https://godbolt.org/z/MxaoKvEfs

More info about llvm-mos is available at https://www.llvm-mos.org.

Oh wow, that's awesome! And that's going to make my life so much easier

Thanks for pointing it out