Hi, I'd like to gentle ping this:
https://gcc.gnu.org/pipermail/gcc-patches/2020-December/562407.html BR, Kewen on 2020/12/22 下午4:08, Kewen.Lin via Gcc-patches wrote: > Hi, > > This patch is to make unsigned int vector init go with > rldimi to merge two integers instead of shift and ior. > > I tried to use nonzero_bits in md file to make it more > general, but the testing shows it isn't doable. The > reason is that some passes would replace some pseudos > with other pseudos and do the recog again, but at that > time the nonzero_bits could get rough information and > lead the recog fails unexpectedly. > > btw, the test case would reply on the combine patch[1]. > > Bootstrapped/regtested on powerpc64le-linux-gnu P9. > > BR, > Kewen > > [1] https://gcc.gnu.org/pipermail/gcc-patches/2020-December/561413.html > > gcc/ChangeLog: > > * config/rs6000/rs6000.md (*rotl<mode>3_insert_3): Renamed to... > (rotl<mode>3_insert_3): ...this. > * config/rs6000/vsx.md (vsx_init_v4si): Use gen_rotldi3_insert_3 > for integer merging. > > gcc/testsuite/ChangeLog: > > * gcc.target/powerpc/vec-init-10.c: New test. > > ----- >
