bfc hangs due to compile-time evaluation about bfc HOT 4 OPEN

Another similar problem is also found when compiling:

-[+ >>>.><-[--<]-->.+.--],[><--[.]-]- [] >>- <-,>,

it shows the warning but the compilation is not stopping.

from bfc.

This looks like an issue where we aggressively unroll the loop due to compile-time evaluation, send a huge amount of IR to LLVM, and then it spends ages trying to optimise the IR.

I've added an undocumented BFC_MAX_STEPS which limits the execution steps and thus the LLVM IR size. Nonetheless, execution steps are still fast, it's the IR munging afterwards that's taking the time.

Possibly related: #26.

from bfc.

Since the issue is addressed by the owner. I will close this thread.

from bfc.

I think this a genuine bug worth fixing, so I'm going to reopen this :)

from bfc.