ghc -S test.cmm panics
```bash
$ cat hi.cmm
test(bits64 x) {
return (x);
}
$ /opt/exp/ghc/ghc-landing/_build/stage1/bin/ghc hi.cmm -S
ghc: panic! (the 'impossible' happened)
GHC version 9.9.20230701:
CMM pipeline - produced no .o file
CallStack (from HasCallStack):
panic, called at compiler/GHC/Driver/Pipeline.hs:863:16 in ghc-9.9-inplace:GHC.Driver.Pipeline
Please report this as a GHC bug: https://www.haskell.org/ghc/reportabug
```
This breaks ghc/test-primops> usage.
issue