[PATCH] D152147: [RISCV] Fold binary op into select if profitable.

[Mikhail Gudim via Phabricator via llvm-commits]

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Consider the following pattern `binOp (select cond, x, c0), c1`.
Where `c0` and `c1` are constants.
We can transform it to `select cond, binOp(x, c1), binOp(c0, c1)`.

If `binOp(c0, c1)` ends up being `0` or `-1` we can turn the select into
a more profitable sequence.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D152147

Files:
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp
  llvm/test/CodeGen/RISCV/fold-binop-into-select.ll

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