Index: llvm/lib/Target/AMDGPU/AMDGPUMachineCFGStructurizer.cpp
===================================================================
--- llvm/lib/Target/AMDGPU/AMDGPUMachineCFGStructurizer.cpp
+++ llvm/lib/Target/AMDGPU/AMDGPUMachineCFGStructurizer.cpp
@@ -862,7 +862,7 @@
 void LinearizedRegion::print(raw_ostream &OS, const TargetRegisterInfo *TRI) {
   OS << "Linearized Region {";
   bool IsFirst = true;
-  for (const auto &MBB : MBBs) {
+  for (const auto MBB : MBBs) {
     if (IsFirst) {
       IsFirst = false;
     } else {
@@ -996,7 +996,7 @@
 void LinearizedRegion::addMBB(MachineBasicBlock *MBB) { MBBs.insert(MBB); }
 
 void LinearizedRegion::addMBBs(LinearizedRegion *InnerRegion) {
-  for (const auto &MBB : InnerRegion->MBBs) {
+  for (const auto MBB : InnerRegion->MBBs) {
     addMBB(MBB);
   }
 }
Index: llvm/lib/Target/AMDGPU/AMDGPUUnifyMetadata.cpp
===================================================================
--- llvm/lib/Target/AMDGPU/AMDGPUUnifyMetadata.cpp
+++ llvm/lib/Target/AMDGPU/AMDGPUUnifyMetadata.cpp
@@ -61,7 +61,7 @@
         return false;
       MDNode *MaxMD = nullptr;
       auto MaxVer = 0U;
-      for (const auto &VersionMD : NamedMD->operands()) {
+      for (const auto VersionMD : NamedMD->operands()) {
         assert(VersionMD->getNumOperands() == 2);
         auto CMajor = mdconst::extract<ConstantInt>(VersionMD->getOperand(0));
         auto VersionMajor = CMajor->getZExtValue();
@@ -94,7 +94,7 @@
       return false;
 
     SmallVector<Metadata *, 4> All;
-    for (const auto &MD : NamedMD->operands())
+    for (const auto MD : NamedMD->operands())
       for (const auto &Op : MD->operands())
         if (std::find(All.begin(), All.end(), Op.get()) == All.end())
           All.push_back(Op.get());