Refactor the code to grab the low and high parts of a value

using EXTRACT_ELEMENT into a utility function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70056 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 12 insertions, 0 deletions

diff --git a/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp b/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
index 985d345956..632524fd96 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
@@ -933,6 +933,18 @@ void DAGTypeLegalizer::GetSplitDestVTs(MVT InVT, MVT &LoVT, MVT &HiVT) {
   }
 }
 
+/// GetPairElements - Use ISD::EXTRACT_ELEMENT nodes to extract the low and
+/// high parts of the given value.
+void DAGTypeLegalizer::GetPairElements(SDValue Pair,
+                                       SDValue &Lo, SDValue &Hi) {
+  DebugLoc dl = Pair.getDebugLoc();
+  MVT NVT = TLI.getTypeToTransformTo(Pair.getValueType());
+  Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, NVT, Pair,
+                   DAG.getIntPtrConstant(0));
+  Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, NVT, Pair,
+                   DAG.getIntPtrConstant(1));
+}
+
 SDValue DAGTypeLegalizer::GetVectorElementPointer(SDValue VecPtr, MVT EltVT,
                                                   SDValue Index) {
   DebugLoc dl = Index.getDebugLoc();