Add function getAddToReg to the class SelectionDAG

Author: PanTao2

llvm/include/llvm/CodeGen/SelectionDAG.h

@@ -853,6 +853,10 @@ class SelectionDAG {
                    ArrayRef(Ops, Glue.getNode() ? 3 : 2));
   }
 
+  SDValue getAddToReg(const SDLoc &dl, Register Reg, EVT VT, SDValue Delta) {
+    return getNode(ISD::ADD, dl, VT, getRegister(Reg, VT), Delta);
+  }
+
   LLVM_ABI SDValue getCondCode(ISD::CondCode Cond);
 
   /// Return an ISD::VECTOR_SHUFFLE node. The number of elements in VT,

llvm/lib/Target/AArch64/AArch64ISelLowering.cpp

@@ -29253,9 +29253,8 @@ SDValue AArch64TargetLowering::emitStackGuardMixCookie(SelectionDAG &DAG,
                                                        const SDLoc &DL,
                                                        bool FailureBB) const {
   if (FailureBB) {
-    return DAG.getNode(
-        ISD::ADD, DL, Val.getValueType(),
-        DAG.getRegister(getStackPointerRegisterToSaveRestore(), MVT::i64), Val);
+    return DAG.getAddToReg(DL, getStackPointerRegisterToSaveRestore(), MVT::i64,
+                           Val);
   }
   return Val;
 }