llvm-project

984cb791 - [RISCV] Use vmv.v.x to materialize masks in deinterleave2 lowering (#118500)

[RISCV] Use vmv.v.x to materialize masks in deinterleave2 lowering (#118500) This is a follow up to 2af2634 to use vmv.v.x of i8 constants instead of the prior vid/vand/vmsne sequence. The advantage of the vmv.v.x sequence is that it's always m1 (so cheaper at high LMUL), and can be rematerialized by the register allocator if needed to locally reduce register pressure.