On Fri, Nov 4, 2022 at 11:17 PM Zhongyunde <zhongyu...@huawei.com> wrote: > > hi, > This patch is try to fix the issue > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107190, > would you like to give me some suggestion, thanks.
This seems like a "simplified" version of https://gcc.gnu.org/pipermail/gcc-patches/2021-November/584411.html which just handles power of 2 constants where we know the cond will be removed. We could do even more "simplified" of 1 if needed really. What is the IR before PHI-OPT? Is it just + 1? Also your pattern can be simplified to use integer_pow2p in the match part instead of INTEGER_CST. Thanks, Andrew > > ~/source/gccUpstreamDir/gcc/testsuite(cfg) » git format-patch -1 > --start-number=00 HEAD -o ~/patch > /home/zhongyunde/patch/0000-PHIOPT-Add-A-B-CST-B-match-and-simplify-optimization.patch
