[PATCH] D158870: [SelectionDAG][RISCV] Teach getConstant to use SPLAT_VECTOR_PARTS if vXi64 SPLAT_VECTOR is legal but i64 scalars are not.

[Craig Topper via Phabricator via llvm-commits]

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That matches how such a SPLAT_VECTOR would have been type legalized
so assume it is ok to use for creating constants after type legalization.

Still need some improvements to SPLAT_VECTOR lowering.

This overlaps with some of what D158742 <https://reviews.llvm.org/D158742> was trying to fix.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D158870

Files:
  llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-bitreverse-vp.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-bitreverse.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-bswap-vp.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-bswap.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-ctlz-vp.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-ctlz.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-ctpop-vp.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-ctpop.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-cttz-vp.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-cttz.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fshr-fshl-vp.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vrol.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vror.ll

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