On Wed, Dec 18, 2019 at 4:26 PM Segher Boessenkool <seg...@kernel.crashing.org> wrote: > > On Wed, Dec 18, 2019 at 10:37:11AM +0800, Hongtao Liu wrote: > > Hi: > > This patch is to simplify A * C + (-D) -> (A - D/C) * C when C is a > > power of 2 and D mod C == 0. > > bootstrap and make check is ok. > > Why would this be a good idea? It is not reducing the number of > operators or similar? > It helps VN, so that fre will delete redundant load. > > Segher
-- BR, Hongtao
