Hi, I applied the mentioned last_combine patch(https://patchwork.ozlabs.org/project/gcc/patch/mptbka7em9w....@arm.com/). And did some initial tests.
Found that: 1. Float vector-scalar and vector-imm are OK 2. Integer vector-scalar is OK 3. Integer vector-imm(e.g. a[i] > 16) is not OK. When reaches last_combine pass, vec_duplicate(0x10) form is still kept, but no pattern match this now, because all scalar patterns have “register_operand” predication. I think MD file or expand function of rvv need to change for this situation. Regards, Demin
