[PATCH] D98004: [RISCV][SelectionDAG] Introduce an ISD::SPLAT_VECTOR_PARTS node that can represent a splat of 2 i32 values into a nxvXi64 vector for riscv32.

Mon Mar 8 01:53:12 PST 2021

frasercrmck added inline comments.

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Comment at: llvm/include/llvm/CodeGen/ISDOpcodes.h:574

+  /// SPLAT_VECTOR_PARTS(Hi, Lo) - Returns a vector with the scalar
+  /// values Lo and Hi joined together and then duplicated in all lanes. This
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Do we need to considering opening this up to allow more than two parts from the get-go? We don't really have anything to test it with but I fear it'll be hard to update baked-in assumptions when someone needs a splat_vector_parts with 4 or more parts.

Also, this looks like it should be `SPLAT_VECTOR_PARTS(Lo, Hi)` as that's how it's used below.

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D98004/new/

https://reviews.llvm.org/D98004