[PATCH] D32596: [DAGCombine] Transform (fadd A, (fmul B, -2.0)) -> (fsub A, (fadd B, B)).

[Chad Rosier via Phabricator via llvm-commits]

mcrosier updated this revision to Diff 97713.
mcrosier added a comment.

-Check for a single use, so that we know the fmul will be folded away.


https://reviews.llvm.org/D32596

Files:
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  test/CodeGen/AArch64/fadd-combines.ll
  test/CodeGen/AMDGPU/fmuladd.f32.ll

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