[AArch64 NEON] Fix pattern match failed on FP_ROUND from v1f128 to v1f64.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200109 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 13 insertions, 0 deletions

diff --git a/lib/CodeGen/SelectionDAG/LegalizeTypes.h b/lib/CodeGen/SelectionDAG/LegalizeTypes.h
index d6a2bd85b8..947ea10fd7 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeTypes.h
+++ b/lib/CodeGen/SelectionDAG/LegalizeTypes.h
@@ -541,6 +541,7 @@ private:
   SDValue ScalarizeVecOp_CONCAT_VECTORS(SDNode *N);
   SDValue ScalarizeVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
   SDValue ScalarizeVecOp_STORE(StoreSDNode *N, unsigned OpNo);
+  SDValue ScalarizeVecOp_FP_ROUND(SDNode *N, unsigned OpNo);
 
   //===--------------------------------------------------------------------===//
   // Vector Splitting Support: LegalizeVectorTypes.cpp
diff --git a/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp b/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
index 2af0c55d96..d86f8f0be2 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
@@ -384,6 +384,9 @@ bool DAGTypeLegalizer::ScalarizeVectorOperand(SDNode *N, unsigned OpNo) {
     case ISD::STORE:
       Res = ScalarizeVecOp_STORE(cast<StoreSDNode>(N), OpNo);
       break;
+    case ISD::FP_ROUND:
+      Res = ScalarizeVecOp_FP_ROUND(N, OpNo);
+      break;
     }
   }
 
@@ -467,6 +470,15 @@ SDValue DAGTypeLegalizer::ScalarizeVecOp_STORE(StoreSDNode *N, unsigned OpNo){
                       N->getOriginalAlignment(), N->getTBAAInfo());
 }
 
+/// ScalarizeVecOp_FP_ROUND - If the value to round is a vector that needs
+/// to be scalarized, it must be <1 x ty>.  Convert the element instead.
+SDValue DAGTypeLegalizer::ScalarizeVecOp_FP_ROUND(SDNode *N, unsigned OpNo) {
+  SDValue Elt = GetScalarizedVector(N->getOperand(0));
+  SDValue Res = DAG.getNode(ISD::FP_ROUND, SDLoc(N),
+                            N->getValueType(0).getVectorElementType(), Elt,
+                            N->getOperand(1));
+  return DAG.getNode(ISD::SCALAR_TO_VECTOR, SDLoc(N), N->getValueType(0), Res);
+}
 
 //===----------------------------------------------------------------------===//
 //  Result Vector Splitting