Index: include/llvm/InitializePasses.h
===================================================================
--- include/llvm/InitializePasses.h
+++ include/llvm/InitializePasses.h
@@ -138,6 +138,7 @@
 void initializeFloat2IntLegacyPassPass(PassRegistry&);
 void initializeForceFunctionAttrsLegacyPassPass(PassRegistry&);
 void initializeForwardControlFlowIntegrityPass(PassRegistry&);
+void initializeFreeMachineFunctionPass(PassRegistry&);
 void initializeFuncletLayoutPass(PassRegistry&);
 void initializeFunctionImportLegacyPassPass(PassRegistry&);
 void initializeGCMachineCodeAnalysisPass(PassRegistry&);
@@ -296,6 +297,7 @@
 void initializePredicateInfoPrinterLegacyPassPass(PassRegistry&);
 void initializePrintBasicBlockPassPass(PassRegistry&);
 void initializePrintFunctionPassWrapperPass(PassRegistry&);
+void initializePrintLoopPassWrapperPass(PassRegistry&);
 void initializePrintModulePassWrapperPass(PassRegistry&);
 void initializeProcessImplicitDefsPass(PassRegistry&);
 void initializeProfileSummaryInfoWrapperPassPass(PassRegistry&);
Index: lib/Analysis/Analysis.cpp
===================================================================
--- lib/Analysis/Analysis.cpp
+++ lib/Analysis/Analysis.cpp
@@ -49,6 +49,7 @@
   initializePostDomPrinterPass(Registry);
   initializePostDomOnlyViewerPass(Registry);
   initializePostDomOnlyPrinterPass(Registry);
+  initializePrintLoopPassWrapperPass(Registry);
   initializeAAResultsWrapperPassPass(Registry);
   initializeGlobalsAAWrapperPassPass(Registry);
   initializeIVUsersWrapperPassPass(Registry);
Index: lib/Analysis/LoopPass.cpp
===================================================================
--- lib/Analysis/LoopPass.cpp
+++ lib/Analysis/LoopPass.cpp
@@ -20,6 +20,7 @@
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/OptBisect.h"
 #include "llvm/IR/PassManager.h"
+#include "llvm/Pass.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/Timer.h"
 #include "llvm/Support/raw_ostream.h"
@@ -61,6 +62,9 @@
 char PrintLoopPassWrapper::ID = 0;
 }
 
+INITIALIZE_PASS(PrintLoopPassWrapper, "print-loop",
+                "Print loop to stderr", false, false)
+
 //===----------------------------------------------------------------------===//
 // LPPassManager
 //
Index: lib/CodeGen/CodeGen.cpp
===================================================================
--- lib/CodeGen/CodeGen.cpp
+++ lib/CodeGen/CodeGen.cpp
@@ -34,6 +34,7 @@
   initializeExpandPostRAPass(Registry);
   initializeFEntryInserterPass(Registry);
   initializeFinalizeMachineBundlesPass(Registry);
+  initializeFreeMachineFunctionPass(Registry);
   initializeFuncletLayoutPass(Registry);
   initializeGCMachineCodeAnalysisPass(Registry);
   initializeGCModuleInfoPass(Registry);
Index: lib/CodeGen/MachineModuleInfo.cpp
===================================================================
--- lib/CodeGen/MachineModuleInfo.cpp
+++ lib/CodeGen/MachineModuleInfo.cpp
@@ -320,6 +320,12 @@
 }
 } // end namespace llvm
 
+INITIALIZE_PASS_BEGIN(FreeMachineFunction, "freemachinefunction",
+                      "Free the MachineFunction", false, false)
+INITIALIZE_PASS_DEPENDENCY(MachineModuleInfo)
+INITIALIZE_PASS_END(FreeMachineFunction, "freemachinefunction",
+                    "Free the MachineFunction", false, false)
+
 //===- MMI building helpers -----------------------------------------------===//
 
 void llvm::computeUsesVAFloatArgument(const CallInst &I,
Index: test/CodeGen/MIR/Generic/pass-registration.mir
===================================================================
--- /dev/null
+++ test/CodeGen/MIR/Generic/pass-registration.mir
@@ -0,0 +1,14 @@
+# RUN: llc -run-pass=print-loop -debug-pass=Arguments -o -- %s 2>&1 | FileCheck %s
+# RUN: llc -run-pass=freemachinefunction -debug-pass=Arguments -o -- %s 2>&1 | FileCheck %s --check-prefix=CHECK2
+
+# Check that loop-printer and freemachinefunction passes are initialized correctly with the pass-registry,
+# so that it is possible to use them with -run-pass.
+
+# CHECK: -domtree -loops -print-loop
+# CHECK2: -machinemoduleinfo -freemachinefunction
+
+---
+name: loop
+body: |
+  bb.0:
+...
Index: tools/llc/llc.cpp
===================================================================
--- tools/llc/llc.cpp
+++ tools/llc/llc.cpp
@@ -294,6 +294,7 @@
   PassRegistry *Registry = PassRegistry::getPassRegistry();
   initializeCore(*Registry);
   initializeCodeGen(*Registry);
+  initializeAnalysis(*Registry);
   initializeLoopStrengthReducePass(*Registry);
   initializeLowerIntrinsicsPass(*Registry);
   initializeCountingFunctionInserterPass(*Registry);