Hi devs,
I just found that the Cmm code of `GHC.Base.id` refers to `breakpoint`
in the same module, however, in the Haskell source of `GHC.Base`, the
definition of `id` and `breakpoint` are totally unrelated:
```
id :: a -> a
id x = x
breakpoint :: a -> a
breakpoint r = r
```
And here's the pretty-printed Cmm code:
```
base_GHCziBase_id_entry() // [R2]
{ []
}
{offset
chwa: // global
R2 = R2;
call base_GHCziBase_breakpoint_entry(R2) args: 8, res: 0, upd: 8;
}
base_GHCziBase_breakpoint_entry() // [R2]
{ []
}
{offset
chvW: // global
R1 = R2;
call stg_ap_0_fast(R1) args: 8, res: 0, upd: 8;
}
```
This looks suspicious. I'm curious if this is intended behavior of ghc.
Regards,
Shao Cheng
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