[PATCH] D132837: [ISel] Enable generating more fma instructions.

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


================
Comment at: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:14185
+        SDValue NewFMA = DAG.getNode(PreferredFusedOpcode, SL, VT, C, D, FMA);
+        DAG.UpdateNodeOperands(TmpFMA.getNode(), A, B, E);
+
----------------
Why use UpdateNodeOperands here instead of just constructing the new node normally?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D132837/new/

https://reviews.llvm.org/D132837