Switch the canonical FMA term operand order to match both the comment I wrote and the usual LLVM convention.

llvm-svn: 157708
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 647ff6b..3b8489f 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -5771,7 +5771,7 @@
     return DAG.getNode(ISD::FADD, N->getDebugLoc(), VT, N0, N2);
 
   // Canonicalize (fma c, x, y) -> (fma x, c, y)
-  if (!N0CFP && N1CFP)
+  if (N0CFP && !N1CFP)
     return DAG.getNode(ISD::FMA, N->getDebugLoc(), VT, N1, N0, N2);
 
   return SDValue();