[RISCV] Add support for VECTOR_REVERSE for scalable vector types.
I've left mask registers to a future patch as we'll need to convert them to full vectors, shuffle, and then truncate. Reviewed By: frasercrmck Differential Revision: https://reviews.llvm.org/D97609
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- llvm/lib/Target/RISCV/RISCVISelLowering.cpp 86 additions, 0 deletionsllvm/lib/Target/RISCV/RISCVISelLowering.cpp
- llvm/lib/Target/RISCV/RISCVISelLowering.h 5 additions, 1 deletionllvm/lib/Target/RISCV/RISCVISelLowering.h
- llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td 62 additions, 0 deletionsllvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td
- llvm/test/CodeGen/RISCV/rvv/named-vector-shuffle-reverse.ll 1113 additions, 0 deletionsllvm/test/CodeGen/RISCV/rvv/named-vector-shuffle-reverse.ll
- llvm/utils/TableGen/CodeGenDAGPatterns.cpp 13 additions, 2 deletionsllvm/utils/TableGen/CodeGenDAGPatterns.cpp
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