[Bug rtl-optimization/113495] RISC-V: Time and memory awful consumption of SPEC2017 wrf benchmark

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113495

--- Comment #15 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(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 ...