[PATCH] D110028: [RISCV] Improve support for forming widening multiplies when one input is a scalar splat.

[Craig Topper via Phabricator via llvm-commits]

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If one input of a fixed vector multiply is a sign/zero extend and
the other operand is a splat of a scalar, we can use a widening
multiply if the scalar value has sufficient sign/zero bits.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D110028

Files:
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vwmul.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vwmulu.ll

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