[PATCH] D32596: [DAGCombine] Transform (fadd A, (fmul B, -2.0)) -> (fsub A, (fadd B, B)).
Chad Rosier via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Wed May 3 12:50:43 PDT 2017
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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