compiler_rt: refactor __mulodi2 and __muloti2 to get __mulosi2
- use comptime instead of 2 identical implementations
- tests: port missing tests and link to archived llvm-mirror release 80
See #1290
eb1e75b2b8Jan Philipp Hafer committed on 12/14/2021, 10:16:24 PM· committed by Andrew Kelleyparent93c6ab4