Re: [PATCH, rs6000] Add subreg patterns for SImode rotate and mask insert

Hi, on 2024/3/1 10:41, HAO CHEN GUI wrote: > Hi, > This patch fixes regression cases in gcc.target/powerpc/rlwimi-2.c. In > combine pass, SImode (subreg from DImode) lshiftrt is converted to DImode > lshiftrt with an out AND. It matches a DImode rotate and mask insert on > rs6000. > > Trying 2

[PATCH, rs6000] Add subreg patterns for SImode rotate and mask insert

Hi, This patch fixes regression cases in gcc.target/powerpc/rlwimi-2.c. In combine pass, SImode (subreg from DImode) lshiftrt is converted to DImode lshiftrt with an out AND. It matches a DImode rotate and mask insert on rs6000. Trying 2 -> 7: 2: r122:DI=r129:DI REG_DEAD r129:DI