Teach DAGCombine to canonicalize the position of a constant in the term operands of an FMA node.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157707 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index af61493..647ff6b 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -5770,6 +5770,10 @@
if (N1CFP && N1CFP->isExactlyValue(1.0))
return DAG.getNode(ISD::FADD, N->getDebugLoc(), VT, N0, N2);
+ // Canonicalize (fma c, x, y) -> (fma x, c, y)
+ if (!N0CFP && N1CFP)
+ return DAG.getNode(ISD::FMA, N->getDebugLoc(), VT, N1, N0, N2);
+
return SDValue();
}