diff --git a/llvm/lib/Target/X86/X86FrameLowering.cpp b/llvm/lib/Target/X86/X86FrameLowering.cpp
index e8d0f12c5698..f64e5d45dfb6 100644
--- a/llvm/lib/Target/X86/X86FrameLowering.cpp
+++ b/llvm/lib/Target/X86/X86FrameLowering.cpp
@@ -416,8 +416,6 @@ void X86FrameLowering::emitStackProbeCall(MachineFunction &MF,
   const X86Subtarget &STI = MF.getTarget().getSubtarget<X86Subtarget>();
   bool Is64Bit = STI.is64Bit();
   bool IsLargeCodeModel = MF.getTarget().getCodeModel() == CodeModel::Large;
-  const X86RegisterInfo *RegInfo =
-      static_cast<const X86RegisterInfo *>(MF.getSubtarget().getRegisterInfo());
 
   unsigned CallOp;
   if (Is64Bit)
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 29fb81193952..a5387e21202d 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -21058,7 +21058,6 @@ X86TargetLowering::EmitLoweredSegAlloca(MachineInstr *MI,
 MachineBasicBlock *
 X86TargetLowering::EmitLoweredWinAlloca(MachineInstr *MI,
                                         MachineBasicBlock *BB) const {
-  const TargetInstrInfo *TII = BB->getParent()->getSubtarget().getInstrInfo();
   DebugLoc DL = MI->getDebugLoc();
 
   assert(!Subtarget->isTargetMachO());