Index: include/llvm/CodeGen/AsmPrinter.h
===================================================================
--- include/llvm/CodeGen/AsmPrinter.h
+++ include/llvm/CodeGen/AsmPrinter.h
@@ -400,7 +400,7 @@
   /// By default, this method prints the label for the specified
   /// MachineBasicBlock, an alignment (if present) and a comment describing it
   /// if appropriate.
-  virtual void EmitBasicBlockStart(const MachineBasicBlock &MBB) const;
+  virtual void EmitBasicBlockStart(const MachineBasicBlock &MBB);
 
   /// Targets can override this to emit stuff at the end of a basic block.
   virtual void EmitBasicBlockEnd(const MachineBasicBlock &MBB);
Index: lib/CodeGen/AsmPrinter/AsmPrinter.cpp
===================================================================
--- lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -2895,7 +2895,7 @@
 /// EmitBasicBlockStart - This method prints the label for the specified
 /// MachineBasicBlock, an alignment (if present) and a comment describing
 /// it if appropriate.
-void AsmPrinter::EmitBasicBlockStart(const MachineBasicBlock &MBB) const {
+void AsmPrinter::EmitBasicBlockStart(const MachineBasicBlock &MBB) {
   // End the previous funclet and start a new one.
   if (MBB.isEHFuncletEntry()) {
     for (const HandlerInfo &HI : Handlers) {
Index: lib/Target/AMDGPU/AMDGPUAsmPrinter.h
===================================================================
--- lib/Target/AMDGPU/AMDGPUAsmPrinter.h
+++ lib/Target/AMDGPU/AMDGPUAsmPrinter.h
@@ -125,7 +125,7 @@
 
   void EmitFunctionEntryLabel() override;
 
-  void EmitBasicBlockStart(const MachineBasicBlock &MBB) const override;
+  void EmitBasicBlockStart(const MachineBasicBlock &MBB) override;
 
   void EmitGlobalVariable(const GlobalVariable *GV) override;
 
@@ -140,8 +140,8 @@
                        const char *ExtraCode, raw_ostream &O) override;
 
 protected:
-  mutable std::vector<std::string> DisasmLines, HexLines;
-  mutable size_t DisasmLineMaxLen;
+  std::vector<std::string> DisasmLines, HexLines;
+  size_t DisasmLineMaxLen;
 };
 
 } // end namespace llvm
Index: lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
===================================================================
--- lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
+++ lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
@@ -273,7 +273,7 @@
   AsmPrinter::EmitFunctionEntryLabel();
 }
 
-void AMDGPUAsmPrinter::EmitBasicBlockStart(const MachineBasicBlock &MBB) const {
+void AMDGPUAsmPrinter::EmitBasicBlockStart(const MachineBasicBlock &MBB) {
   if (DumpCodeInstEmitter && !isBlockOnlyReachableByFallthrough(&MBB)) {
     // Write a line for the basic block label if it is not only fallthrough.
     DisasmLines.push_back(
Index: lib/Target/NVPTX/NVPTXAsmPrinter.h
===================================================================
--- lib/Target/NVPTX/NVPTXAsmPrinter.h
+++ lib/Target/NVPTX/NVPTXAsmPrinter.h
@@ -200,7 +200,7 @@
   const Function *F;
   std::string CurrentFnName;
 
-  void EmitBasicBlockStart(const MachineBasicBlock &MBB) const override;
+  void EmitBasicBlockStart(const MachineBasicBlock &MBB) override;
   void EmitFunctionEntryLabel() override;
   void EmitFunctionBodyStart() override;
   void EmitFunctionBodyEnd() override;
Index: lib/Target/NVPTX/NVPTXAsmPrinter.cpp
===================================================================
--- lib/Target/NVPTX/NVPTXAsmPrinter.cpp
+++ lib/Target/NVPTX/NVPTXAsmPrinter.cpp
@@ -434,7 +434,7 @@
   return false;
 }
 
-void NVPTXAsmPrinter::EmitBasicBlockStart(const MachineBasicBlock &MBB) const {
+void NVPTXAsmPrinter::EmitBasicBlockStart(const MachineBasicBlock &MBB) {
   AsmPrinter::EmitBasicBlockStart(MBB);
   if (isLoopHeaderOfNoUnroll(MBB))
     OutStreamer->EmitRawText(StringRef("\t.pragma \"nounroll\";\n"));