[llvm] r371724 - [DAGCombine] visitFDIV - Use isCheaperToUseNegatedFPOps helper for (fdiv (fneg X), (fneg Y)) -> (fdiv X, Y). NFCI.

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Thu Sep 12 04:03:09 2019
New Revision: 371724

URL: http://llvm.org/viewvc/llvm-project?rev=371724&view=rev
Log:
[DAGCombine] visitFDIV - Use isCheaperToUseNegatedFPOps helper for (fdiv (fneg X), (fneg Y)) -> (fdiv X, Y). NFCI.

Minor cleanup to use equivalent helper code.

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

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp?rev=371724&r1=371723&r2=371724&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp Thu Sep 12 04:03:09 2019
@@ -12687,21 +12687,11 @@ SDValue DAGCombiner::visitFDIV(SDNode *N
   }
 
   // (fdiv (fneg X), (fneg Y)) -> (fdiv X, Y)
-  if (char LHSNeg = isNegatibleForFree(N0, LegalOperations, TLI, &Options,
-                                       ForCodeSize)) {
-    if (char RHSNeg = isNegatibleForFree(N1, LegalOperations, TLI, &Options,
-                                         ForCodeSize)) {
-      // Both can be negated for free, check to see if at least one is cheaper
-      // negated.
-      if (LHSNeg == 2 || RHSNeg == 2)
-        return DAG.getNode(ISD::FDIV, SDLoc(N), VT,
-                           GetNegatedExpression(N0, DAG, LegalOperations,
-                                                ForCodeSize),
-                           GetNegatedExpression(N1, DAG, LegalOperations,
-                                                ForCodeSize),
-                           Flags);
-    }
-  }
+  if (isCheaperToUseNegatedFPOps(N0, N1))
+    return DAG.getNode(
+        ISD::FDIV, SDLoc(N), VT,
+        GetNegatedExpression(N0, DAG, LegalOperations, ForCodeSize),
+        GetNegatedExpression(N1, DAG, LegalOperations, ForCodeSize), Flags);
 
   return SDValue();
 }