Index: lib/Transforms/Instrumentation/PGOMemOPSizeOpt.cpp
===================================================================
--- lib/Transforms/Instrumentation/PGOMemOPSizeOpt.cpp
+++ lib/Transforms/Instrumentation/PGOMemOPSizeOpt.cpp
@@ -21,16 +21,16 @@
 #include "llvm/ADT/Twine.h"
 #include "llvm/Analysis/BlockFrequencyInfo.h"
 #include "llvm/Analysis/GlobalsModRef.h"
+#include "llvm/Analysis/OptimizationDiagnosticInfo.h"
 #include "llvm/IR/BasicBlock.h"
 #include "llvm/IR/CallSite.h"
 #include "llvm/IR/DerivedTypes.h"
-#include "llvm/IR/DiagnosticInfo.h"
 #include "llvm/IR/Function.h"
 #include "llvm/IR/IRBuilder.h"
+#include "llvm/IR/InstVisitor.h"
 #include "llvm/IR/InstrTypes.h"
 #include "llvm/IR/Instruction.h"
 #include "llvm/IR/Instructions.h"
-#include "llvm/IR/InstVisitor.h"
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/PassManager.h"
 #include "llvm/IR/Type.h"
@@ -110,6 +110,7 @@
   bool runOnFunction(Function &F) override;
   void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.addRequired<BlockFrequencyInfoWrapperPass>();
+    AU.addRequired<OptimizationRemarkEmitterWrapperPass>();
     AU.addPreserved<GlobalsAAWrapperPass>();
   }
 };
@@ -131,8 +132,9 @@
 namespace {
 class MemOPSizeOpt : public InstVisitor<MemOPSizeOpt> {
 public:
-  MemOPSizeOpt(Function &Func, BlockFrequencyInfo &BFI)
-      : Func(Func), BFI(BFI), Changed(false) {
+  MemOPSizeOpt(Function &Func, BlockFrequencyInfo &BFI,
+               OptimizationRemarkEmitter &ORE)
+      : Func(Func), BFI(BFI), ORE(ORE), Changed(false) {
     ValueDataArray =
         llvm::make_unique<InstrProfValueData[]>(MemOPMaxVersion + 2);
     // Get the MemOPSize range information from option MemOPSizeRange,
@@ -166,6 +168,7 @@
 private:
   Function &Func;
   BlockFrequencyInfo &BFI;
+  OptimizationRemarkEmitter &ORE;
   bool Changed;
   std::vector<MemIntrinsic *> WorkList;
   // Start of the previse range.
@@ -376,23 +379,26 @@
   DEBUG(dbgs() << *DefaultBB << "\n");
   DEBUG(dbgs() << *MergeBB << "\n");
 
-  emitOptimizationRemark(Func.getContext(), "memop-opt", Func,
-                         MI->getDebugLoc(),
-                         Twine("optimize ") + getMIName(MI) + " with count " +
-                             Twine(SumForOpt) + " out of " + Twine(TotalCount) +
-                             " for " + Twine(Version) + " versions");
+  {
+    using namespace ore;
+    ORE.emit(OptimizationRemark(DEBUG_TYPE, "memopt-opt", MI)
+             << "optimized " << getMIName(MI) << " with count "
+             << NV("Count", SumForOpt) << " out of " << NV("Total", TotalCount)
+             << " for " << NV("Versions", Version) << " versions");
+  }
 
   return true;
 }
 } // namespace
 
-static bool PGOMemOPSizeOptImpl(Function &F, BlockFrequencyInfo &BFI) {
+static bool PGOMemOPSizeOptImpl(Function &F, BlockFrequencyInfo &BFI,
+                                OptimizationRemarkEmitter &ORE) {
   if (DisableMemOPOPT)
     return false;
 
   if (F.hasFnAttribute(Attribute::OptimizeForSize))
     return false;
-  MemOPSizeOpt MemOPSizeOpt(F, BFI);
+  MemOPSizeOpt MemOPSizeOpt(F, BFI, ORE);
   MemOPSizeOpt.perform();
   return MemOPSizeOpt.isChanged();
 }
@@ -400,7 +406,8 @@
 bool PGOMemOPSizeOptLegacyPass::runOnFunction(Function &F) {
   BlockFrequencyInfo &BFI =
       getAnalysis<BlockFrequencyInfoWrapperPass>().getBFI();
-  return PGOMemOPSizeOptImpl(F, BFI);
+  auto &ORE = getAnalysis<OptimizationRemarkEmitterWrapperPass>().getORE();
+  return PGOMemOPSizeOptImpl(F, BFI, ORE);
 }
 
 namespace llvm {
@@ -409,7 +416,8 @@
 PreservedAnalyses PGOMemOPSizeOpt::run(Function &F,
                                        FunctionAnalysisManager &FAM) {
   auto &BFI = FAM.getResult<BlockFrequencyAnalysis>(F);
-  bool Changed = PGOMemOPSizeOptImpl(F, BFI);
+  auto &ORE = FAM.getResult<OptimizationRemarkEmitterAnalysis>(F);
+  bool Changed = PGOMemOPSizeOptImpl(F, BFI, ORE);
   if (!Changed)
     return PreservedAnalyses::all();
   auto PA = PreservedAnalyses();