[PATCH] D157770: [RISCV][GISel] Make s32 a legal type for RV64 for any operation that has a W version.

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
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My thought is that we can directly select W instructions using s32.

This will likely require combines and other optimizations eventually,
but this makes a simple starting point.

I'm slowly prototyping a similar approach for SelectionDAG.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D157770

Files:
  llvm/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp
  llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv64/legalize-add.mir
  llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv64/legalize-ashr.mir
  llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv64/legalize-const.mir
  llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv64/legalize-lshr.mir
  llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv64/legalize-shl.mir
  llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv64/legalize-sub.mir

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