[PATCH] D79304: [DAG] Fold (mul(abs(x),abs(x))) -> (mul(x,x)) (PR39476)
Roman Lebedev via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Sun May 3 11:41:41 PDT 2020
lebedev.ri added inline comments.
================
Comment at: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:3527-3530
+ // fold mul(abs(x),abs(x)) -> mul(x,x)
+ if (N0 == N1)
+ if (SDValue AbsSrc = MatchABS(N0.getNode()))
+ return DAG.getNode(ISD::MUL, SDLoc(N), VT, AbsSrc, AbsSrc);
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https://reviews.llvm.org/D79304/new/
https://reviews.llvm.org/D79304
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