[PATCH] D108284: [DAGCombiner] Combine frem into fdiv+ftrunc+fma

[Qiu Chaofan via Phabricator via llvm-commits]

qiucf created this revision.
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This helps in C library function `fmod`. `remainder` needs similar optimization, but since that's a libcall instead of a IR/DAG op, we can do it in future patches.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D108284

Files:
  llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  llvm/test/CodeGen/AMDGPU/frem.ll
  llvm/test/CodeGen/PowerPC/frem.ll

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