On Mon, Jul 17, 2023 at 2:05 PM Juzhe-Zhong <juzhe.zh...@rivai.ai> wrote: > > gcc/ChangeLog: > > * config/riscv/riscv.cc (riscv_option_override): Report ERROR for > TARGET_MIN_VLEN > 4096 > > --- > gcc/config/riscv/riscv.cc | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc > index 6ed735d6983..ce523eea9ba 100644 > --- a/gcc/config/riscv/riscv.cc > +++ b/gcc/config/riscv/riscv.cc > @@ -6672,6 +6672,14 @@ riscv_option_override (void) > riscv_stack_protector_guard_offset = offs; > } > > + /* FIXME: We don't allow TARGET_MIN_VLEN > 4096 since the datatypes of > + both GET_MODE_SIZE and GET_MODE_BITSIZE are poly_uint16. > + > + We can only allow TARGET_MIN_VLEN * 8 (LMUL) < 65535. */ > + if (TARGET_MIN_VLEN > 4096) > + error (
For this scenario, use sorry rather than error, and I assume this is only a problem for -param=riscv-autovec-preference=fixed-vlmax? > + "Current RISC-V GCC can not support VLEN > 4096bit for 'V' Extension"); > + > /* Convert -march to a chunks count. */ > riscv_vector_chunks = riscv_convert_vector_bits (); > } > -- > 2.36.1 >
