diff --git a/llvm/include/llvm/CodeGen/MIRPrinter.h b/llvm/include/llvm/CodeGen/MIRPrinter.h
--- a/llvm/include/llvm/CodeGen/MIRPrinter.h
+++ b/llvm/include/llvm/CodeGen/MIRPrinter.h
@@ -14,6 +14,8 @@
 #ifndef LLVM_LIB_CODEGEN_MIRPRINTER_H
 #define LLVM_LIB_CODEGEN_MIRPRINTER_H
 
+#include "llvm/CodeGen/MachinePassManager.h"
+
 namespace llvm {
 
 class MachineBasicBlock;
@@ -22,6 +24,20 @@
 class raw_ostream;
 template <typename T> class SmallVectorImpl;
 
+class PrintMIRPass : public PassInfoMixin<PrintMIRPass> {
+  raw_ostream &OS;
+  std::string MachineFunctions;
+
+public:
+  PrintMIRPass() : OS(dbgs()) {}
+  PrintMIRPass(raw_ostream &OS) : OS(OS) {}
+
+  PreservedAnalyses run(MachineFunction &MF, MachineFunctionAnalysisManager &);
+  Error doFinalization(Module &M, MachineFunctionAnalysisManager &);
+
+  static AnalysisKey Key;
+};
+
 /// Print LLVM IR using the MIR serialization format to the given output stream.
 void printMIR(raw_ostream &OS, const Module &M);
 
diff --git a/llvm/lib/CodeGen/MIRPrintingPass.cpp b/llvm/lib/CodeGen/MIRPrintingPass.cpp
--- a/llvm/lib/CodeGen/MIRPrintingPass.cpp
+++ b/llvm/lib/CodeGen/MIRPrintingPass.cpp
@@ -16,10 +16,29 @@
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/InitializePasses.h"
 #include "llvm/Support/Debug.h"
+#include "llvm/Support/Error.h"
 #include "llvm/Support/raw_ostream.h"
 
 using namespace llvm;
 
+PreservedAnalyses PrintMIRPass::run(MachineFunction &MF,
+                                    MachineFunctionAnalysisManager &) {
+  std::string Str;
+  raw_string_ostream StrOS(Str);
+  printMIR(StrOS, MF);
+  MachineFunctions.append(StrOS.str());
+  return PreservedAnalyses::all();
+}
+
+Error PrintMIRPass::doFinalization(Module &M,
+                                   MachineFunctionAnalysisManager &) {
+  printMIR(OS, M);
+  OS << MachineFunctions;
+  return Error::success();
+}
+
+AnalysisKey PrintMIRPass::Key;
+
 namespace {
 
 /// This pass prints out the LLVM IR to an output stream using the MIR