https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54089
--- Comment #62 from Alexander Klepikov <klepikov.alex+bugs at gmail dot com> --- > I'm a bit concerned about the increased compile time. Have you observed > anything (negative) in this regard? My project is small and it compiles in under 1 second on both clean and patched GCC. sh.exp test suite mean run time is 117s on clean and 119s on patched. I did 1 warm-up run and then 3 main one-threaded runs for each task. I'm thinking of something else. > > Loop, hoist, constant propagation etc (+ all the good stuff) optimizations > are done before insn combine / split1. We could add a simple SH specific > pass that goes over the RTL and does stuff to shifts before those other > optimizations. That's a good idea! > However, it might miss insn combine opportunities later on. Implementing features not supported by hardware will always be a tradeoff.
