[PATCH] D27260: [SelectionDAG] Rename and clarify visitFMULForFMADCombine (NFC)

[Phabricator via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL288336: [SelectionDAG] Rename and clarify visitFMULForFMADCombine (NFC) (authored by nha).

Changed prior to commit:
  https://reviews.llvm.org/D27260?vs=79752&id=79902#toc

Repository:
  rL LLVM

https://reviews.llvm.org/D27260

Files:
  llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp


Index: llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
===================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -326,7 +326,7 @@
 
     SDValue visitFADDForFMACombine(SDNode *N);
     SDValue visitFSUBForFMACombine(SDNode *N);
-    SDValue visitFMULForFMACombine(SDNode *N);
+    SDValue visitFMULForFMADistributiveCombine(SDNode *N);
 
     SDValue XformToShuffleWithZero(SDNode *N);
     SDValue ReassociateOps(unsigned Opc, const SDLoc &DL, SDValue LHS,
@@ -8380,8 +8380,10 @@
   return SDValue();
 }
 
-/// Try to perform FMA combining on a given FMUL node.
-SDValue DAGCombiner::visitFMULForFMACombine(SDNode *N) {
+/// Try to perform FMA combining on a given FMUL node based on the distributive
+/// law x * (y + 1) = x * y + x and variants thereof (commuted versions,
+/// subtraction instead of addition).
+SDValue DAGCombiner::visitFMULForFMADistributiveCombine(SDNode *N) {
   SDValue N0 = N->getOperand(0);
   SDValue N1 = N->getOperand(1);
   EVT VT = N->getValueType(0);
@@ -8776,7 +8778,7 @@
   }
 
   // FMUL -> FMA combines:
-  if (SDValue Fused = visitFMULForFMACombine(N)) {
+  if (SDValue Fused = visitFMULForFMADistributiveCombine(N)) {
     AddToWorklist(Fused.getNode());
     return Fused;
   }


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