[PATCH] D106776: [GlobalISel] Add a constant folding combine.

[Amara Emerson via Phabricator via llvm-commits]

aemerson created this revision.
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These don't always get folded because when the instructions are created the constants are obscured by artifacts, or other reasons.

Use it AArch64 post-legal combiner too.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D106776

Files:
  llvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h
  llvm/include/llvm/Target/GlobalISel/Combine.td
  llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
  llvm/lib/Target/AArch64/AArch64Combine.td
  llvm/test/CodeGen/AArch64/GlobalISel/arm64-atomic-128.ll
  llvm/test/CodeGen/AArch64/GlobalISel/postlegalizer-combiner-constant-fold.mir
  llvm/test/CodeGen/AArch64/fold-global-offsets.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/fshl.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/fshr.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/saddsat.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/ssubsat.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/udiv.i32.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/urem.i32.ll

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