compiler/codeGen/StgCmmPrim.hs¶
Note [Comparing stable names]¶
A StableName# is actually a pointer to a stable name object (SNO) containing an index into the stable name table (SNT). We used to compare StableName#s by following the pointers to the SNOs and checking whether they held the same SNT indices. However, this is not necessary: there is a one-to-one correspondence between SNOs and entries in the SNT, so simple pointer equality does the trick.
These primops are implemented by CallishMachOps, because they sometimes turn into foreign calls depending on the backend.
