Well, there's a couple of pieces of sample code on comp.arch in google groups / usenet. Sadly, I can't find any examples of genAsm anywhere, but a couple of fragments of conAsm. Maybe that's better, as conAsm is what's going to actually run.

This tread for example, talks about instruction density of Mill programs. Mill does somewhat poorly, with a pre-alpha quality compiler doing the codegen; https://groups.google.com/forum/#!topic/comp.arch/RY3Bk7O61u...

Comparing several ISAs on the simple program in the first post, a Mill Gold CPU binary weighs in at 337 bytes (and 33 instructions), compared to:

* powerpc: 212 bytes, 53 instructions * aarch64: 204 bytes, 51 instructions * arm: 176 bytes, 44 instructions * x86_64: 135 bytes, 49 instructions * i386: 130 bytes, 55 instructions * thumb2: 120 bytes, 51 instructions * thumb: 112 bytes, 56 instructions