939352b6ec
RVV C intrinsics use pointers to scalar for base address and their corresponding IR intrinsics but use pointers to vector. It makes some vector load intrinsics need specific ManualCodegen and MaskedManualCodegen to just add bitcast for transforming to IR. For simplifying riscv_vector.td, the patch make RISCVEmitter detect pointer operands and bitcast them. Reviewed By: kito-cheng Differential Revision: https://reviews.llvm.org/D129043