1. [RISCV] Add vector integer mul/mulh/div/rem ISel patterns (details)
Commit e130dea92a8ab477685469df261e3ecc72593525 by fraser
[RISCV] Add vector integer mul/mulh/div/rem ISel patterns

There is no test coverage for the mulhs or mulhu patterns as I can't get
the DAGCombiner to generate them for scalable vectors. There are a few
places in that still need updating for that to work. I left the patterns
in regardless as they are correct.

Reviewed By: craig.topper

Differential Revision:
The file was addedllvm/test/CodeGen/RISCV/rvv/vmul-sdnode-rv64.ll
The file was addedllvm/test/CodeGen/RISCV/rvv/vdivu-sdnode-rv64.ll
The file was addedllvm/test/CodeGen/RISCV/rvv/vrem-sdnode-rv64.ll
The file was addedllvm/test/CodeGen/RISCV/rvv/vdivu-sdnode-rv32.ll
The file was addedllvm/test/CodeGen/RISCV/rvv/vmul-sdnode-rv32.ll
The file was modifiedllvm/lib/Target/RISCV/
The file was addedllvm/test/CodeGen/RISCV/rvv/vrem-sdnode-rv32.ll
The file was addedllvm/test/CodeGen/RISCV/rvv/vremu-sdnode-rv64.ll
The file was addedllvm/test/CodeGen/RISCV/rvv/vdiv-sdnode-rv32.ll
The file was addedllvm/test/CodeGen/RISCV/rvv/vdiv-sdnode-rv64.ll
The file was addedllvm/test/CodeGen/RISCV/rvv/vremu-sdnode-rv32.ll