diff --git a/llvm/lib/Target/Hexagon/HexagonCopyToCombine.cpp b/llvm/lib/Target/Hexagon/HexagonCopyToCombine.cpp
index 832f16fe0371..1d6455c66fa5 100644
--- a/llvm/lib/Target/Hexagon/HexagonCopyToCombine.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonCopyToCombine.cpp
@@ -170,6 +170,8 @@ static bool areCombinableOperations(const TargetRegisterInfo *TRI,
                                     MachineInstr *LowRegInst) {
   unsigned HiOpc = HighRegInst->getOpcode();
   unsigned LoOpc = LowRegInst->getOpcode();
+  (void)HiOpc; // Fix compiler warning
+  (void)LoOpc; // Fix compiler warning
   assert((HiOpc == Hexagon::A2_tfr || HiOpc == Hexagon::A2_tfrsi) &&
          (LoOpc == Hexagon::A2_tfr || LoOpc == Hexagon::A2_tfrsi) &&
          "Assume individual instructions are of a combinable type");
diff --git a/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp b/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp
index 56f670ccf082..c701d2567e61 100644
--- a/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp
@@ -580,6 +580,7 @@ void HexagonFrameLowering::insertEpilogueInBlock(MachineBasicBlock &MBB) const {
   // Handle EH_RETURN.
   if (RetOpc == Hexagon::EH_RETURN_JMPR) {
     MachineOperand &OffsetReg  = RetI->getOperand(0);
+    (void)OffsetReg; // Silence compiler warning.
     assert(OffsetReg.isReg() && "Offset should be in register!");
     BuildMI(MBB, InsertPt, DL, HII.get(Hexagon::L2_deallocframe));
     BuildMI(MBB, InsertPt, DL, HII.get(Hexagon::A2_add), SP)
@@ -818,6 +819,7 @@ void HexagonFrameLowering::eliminateCallFramePseudoInstr(MachineFunction &MF,
       MachineBasicBlock &MBB, MachineBasicBlock::iterator I) const {
   MachineInstr &MI = *I;
   unsigned Opc = MI.getOpcode();
+  (void)Opc; // Silence compiler warning.
   assert((Opc == Hexagon::ADJCALLSTACKDOWN || Opc == Hexagon::ADJCALLSTACKUP) &&
          "Cannot handle this call frame pseudo instruction");
   MBB.erase(I);
@@ -993,7 +995,7 @@ void HexagonFrameLowering::processFunctionBeforeCalleeSavedScan(
 
 
 #ifndef NDEBUG
-void dump_registers(BitVector &Regs, const TargetRegisterInfo &TRI) {
+static void dump_registers(BitVector &Regs, const TargetRegisterInfo &TRI) {
   dbgs() << '{';
   for (int x = Regs.find_first(); x >= 0; x = Regs.find_next(x)) {
     unsigned R = x;
@@ -1007,6 +1009,7 @@ void dump_registers(BitVector &Regs, const TargetRegisterInfo &TRI) {
 bool HexagonFrameLowering::assignCalleeSavedSpillSlots(MachineFunction &MF,
       const TargetRegisterInfo *TRI, std::vector<CalleeSavedInfo> &CSI) const {
   const Function &F = *MF.getFunction();
+  (void)F; // Silence compiler warning.
   DEBUG(dbgs() << LLVM_FUNCTION_NAME << " on " << F.getName() << '\n');
   MachineFrameInfo *MFI = MF.getFrameInfo();
   BitVector SRegs(Hexagon::NUM_TARGET_REGS);