https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113495
--- Comment #16 from JuzheZhong <juzhe.zhong at rivai dot ai> --- (In reply to Andrew Pinski from comment #15) > (In reply to JuzheZhong from comment #14) > > Oh. I known the reason now. > > > > The issue is not RISC-V backend VSETVL PASS. > > > > It's memory bug of rtx_equal_p I think. > > > It is not rtx_equal_p but rather RVV_VLMAX which is defined as: > riscv-protos.h:#define RVV_VLMAX gen_rtx_REG (Pmode, X0_REGNUM) > > Seems like you could cache that somewhere ... Oh. Make sense to me. Thank you so much. I think memory-hog issue will be fixed soon. But the compile-time hog issue of loop invariant motion is still not fixed.
