[PATCH] D137949: [RISCV] Branchless lowering for select (x < 0), TrueConstant, FalseConstant)

[Craig Topper via Phabricator via llvm-commits]

craig.topper added inline comments.


================
Comment at: llvm/lib/Target/RISCV/RISCVISelLowering.cpp:9630
 
+    // select (x < 0), y, z -> x >> (XLEN - 1) & (y - z) + z
+    auto *C = dyn_cast<ConstantSDNode>(RHS);
----------------
What about (x > -1), z, y?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D137949/new/

https://reviews.llvm.org/D137949