[llvm-dev] Jump threading for finite state automata

[Dávid Bolvanský via llvm-dev]

Hello,

As noted in PR39043, LLVM is unable to optimize a code containing finite
state automata implemented using while + switch.

E.g. in popular benchmark Coremark there are various FSMs which LLVM could
optimize more. GCC devs implemented this optimization [1].

[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54742
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