llvm-project

8e4909aa - [RISCV] Remove unnecessary vand.vi from vXi1 and nvXvi1 VECTOR_REVERSE codegen. (#109071)

[RISCV] Remove unnecessary vand.vi from vXi1 and nvXvi1 VECTOR_REVERSE codegen. (#109071) Use a setne with 0 instead of a trunc. We know we zero extended the node so we can get by with a non-zero check only. The truncate lowering doesn't know that we zero extended so has to mask the lsb. I don't think DAG combine sees the trunc before we lower it to RISCVISD nodes so we don't get a chance to use computeKnownBits to remove the AND.