diff --git a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
index bc751d3..20d69f5 100644
--- a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -156,15 +156,15 @@
         Subtarget(&tm.getSubtarget<X86Subtarget>()),
         OptForSize(false) {}
 
-    virtual const char *getPassName() const {
+    const char *getPassName() const override {
       return "X86 DAG->DAG Instruction Selection";
     }
 
-    virtual void EmitFunctionEntryCode();
+    void EmitFunctionEntryCode() override;
 
-    virtual bool IsProfitableToFold(SDValue N, SDNode *U, SDNode *Root) const;
+    bool IsProfitableToFold(SDValue N, SDNode *U, SDNode *Root) const override;
 
-    virtual void PreprocessISelDAG();
+    void PreprocessISelDAG() override;
 
     inline bool immSext8(SDNode *N) const {
       return isInt<8>(cast<ConstantSDNode>(N)->getSExtValue());
@@ -181,7 +181,7 @@
 #include "X86GenDAGISel.inc"
 
   private:
-    SDNode *Select(SDNode *N);
+    SDNode *Select(SDNode *N) override;
     SDNode *SelectGather(SDNode *N, unsigned Opc);
     SDNode *SelectAtomic64(SDNode *Node, unsigned Opc);
     SDNode *SelectAtomicLoadArith(SDNode *Node, MVT NVT);
@@ -219,9 +219,9 @@
 
     /// SelectInlineAsmMemoryOperand - Implement addressing mode selection for
     /// inline asm expressions.
-    virtual bool SelectInlineAsmMemoryOperand(const SDValue &Op,
-                                              char ConstraintCode,
-                                              std::vector<SDValue> &OutOps);
+    bool SelectInlineAsmMemoryOperand(const SDValue &Op,
+                                      char ConstraintCode,
+                                      std::vector<SDValue> &OutOps) override;
 
     void EmitSpecialCodeForMain(MachineBasicBlock *BB, MachineFrameInfo *MFI);