diff --git a/llvm/lib/ExecutionEngine/JITLink/EHFrameSupport.cpp b/llvm/lib/ExecutionEngine/JITLink/EHFrameSupport.cpp
index 72e5f701f89a7..abe9ae7a3da16 100644
--- a/llvm/lib/ExecutionEngine/JITLink/EHFrameSupport.cpp
+++ b/llvm/lib/ExecutionEngine/JITLink/EHFrameSupport.cpp
@@ -70,8 +70,7 @@ Error EHFrameEdgeFixer::operator()(LinkGraph &G) {
   // Sort eh-frame blocks into address order to ensure we visit CIEs before
   // their child FDEs.
   std::vector<Block *> EHFrameBlocks;
-  for (auto *B : EHFrame->blocks())
-    EHFrameBlocks.push_back(B);
+  llvm::append_range(EHFrameBlocks, EHFrame->blocks());
   llvm::sort(EHFrameBlocks, [](const Block *LHS, const Block *RHS) {
     return LHS->getAddress() < RHS->getAddress();
   });
diff --git a/llvm/lib/ExecutionEngine/Orc/COFFVCRuntimeSupport.cpp b/llvm/lib/ExecutionEngine/Orc/COFFVCRuntimeSupport.cpp
index 94f696fa20863..c785381175284 100644
--- a/llvm/lib/ExecutionEngine/Orc/COFFVCRuntimeSupport.cpp
+++ b/llvm/lib/ExecutionEngine/Orc/COFFVCRuntimeSupport.cpp
@@ -86,8 +86,7 @@ Error COFFVCRuntimeBootstrapper::loadVCRuntime(
     if (!G)
       return G.takeError();
 
-    for (auto &Lib : (*G)->getImportedDynamicLibraries())
-      ImportedLibraries.push_back(Lib);
+    llvm::append_range(ImportedLibraries, (*G)->getImportedDynamicLibraries());
 
     JD.addGenerator(std::move(*G));
 
diff --git a/llvm/lib/ExecutionEngine/Orc/Core.cpp b/llvm/lib/ExecutionEngine/Orc/Core.cpp
index d6673552e39fd..cbed057950aea 100644
--- a/llvm/lib/ExecutionEngine/Orc/Core.cpp
+++ b/llvm/lib/ExecutionEngine/Orc/Core.cpp
@@ -127,8 +127,7 @@ void UnsatisfiedSymbolDependencies::log(raw_ostream &OS) const {
 SymbolsNotFound::SymbolsNotFound(std::shared_ptr<SymbolStringPool> SSP,
                                  SymbolNameSet Symbols)
     : SSP(std::move(SSP)) {
-  for (auto &Sym : Symbols)
-    this->Symbols.push_back(Sym);
+  llvm::append_range(this->Symbols, Symbols);
   assert(!this->Symbols.empty() && "Can not fail to resolve an empty set");
 }
 
@@ -2387,8 +2386,8 @@ void ExecutionSession::OL_applyQueryPhase1(
       // Build the definition generator stack for this JITDylib.
       runSessionLocked([&] {
         IPLS->CurDefGeneratorStack.reserve(JD.DefGenerators.size());
-        for (auto &DG : reverse(JD.DefGenerators))
-          IPLS->CurDefGeneratorStack.push_back(DG);
+        llvm::append_range(IPLS->CurDefGeneratorStack,
+                           reverse(JD.DefGenerators));
       });
 
       // Flag that we've done our initialization.
diff --git a/llvm/lib/ExecutionEngine/Orc/IRPartitionLayer.cpp b/llvm/lib/ExecutionEngine/Orc/IRPartitionLayer.cpp
index 9ad171beac7fe..1a37469c35d2e 100644
--- a/llvm/lib/ExecutionEngine/Orc/IRPartitionLayer.cpp
+++ b/llvm/lib/ExecutionEngine/Orc/IRPartitionLayer.cpp
@@ -260,8 +260,7 @@ void IRPartitionLayer::emitPartition(
     {
       std::vector<const GlobalValue *> HashGVs;
       HashGVs.reserve(GVsToExtract->size());
-      for (const auto *GV : *GVsToExtract)
-        HashGVs.push_back(GV);
+      llvm::append_range(HashGVs, *GVsToExtract);
       llvm::sort(HashGVs, [](const GlobalValue *LHS, const GlobalValue *RHS) {
         return LHS->getName() < RHS->getName();
       });
diff --git a/llvm/lib/ExecutionEngine/Orc/LLJIT.cpp b/llvm/lib/ExecutionEngine/Orc/LLJIT.cpp
index 7d385f4cf2fbb..21ebe82c8a71a 100644
--- a/llvm/lib/ExecutionEngine/Orc/LLJIT.cpp
+++ b/llvm/lib/ExecutionEngine/Orc/LLJIT.cpp
@@ -57,8 +57,7 @@ Function *addHelperAndWrapper(Module &M, StringRef WrapperName,
   std::vector<Type *> HelperArgTypes;
   for (auto *Arg : HelperPrefixArgs)
     HelperArgTypes.push_back(Arg->getType());
-  for (auto *T : WrapperFnType->params())
-    HelperArgTypes.push_back(T);
+  llvm::append_range(HelperArgTypes, WrapperFnType->params());
   auto *HelperFnType =
       FunctionType::get(WrapperFnType->getReturnType(), HelperArgTypes, false);
   auto *HelperFn = Function::Create(HelperFnType, GlobalValue::ExternalLinkage,
@@ -72,8 +71,7 @@ Function *addHelperAndWrapper(Module &M, StringRef WrapperName,
   IRBuilder<> IB(EntryBlock);
 
   std::vector<Value *> HelperArgs;
-  for (auto *Arg : HelperPrefixArgs)
-    HelperArgs.push_back(Arg);
+  llvm::append_range(HelperArgs, HelperPrefixArgs);
   for (auto &Arg : WrapperFn->args())
     HelperArgs.push_back(&Arg);
   auto *HelperResult = IB.CreateCall(HelperFn, HelperArgs);
diff --git a/llvm/lib/ExecutionEngine/Orc/MachOPlatform.cpp b/llvm/lib/ExecutionEngine/Orc/MachOPlatform.cpp
index 498d438bc25d4..90194d7fcc119 100644
--- a/llvm/lib/ExecutionEngine/Orc/MachOPlatform.cpp
+++ b/llvm/lib/ExecutionEngine/Orc/MachOPlatform.cpp
@@ -1676,10 +1676,8 @@ Error MachOPlatform::MachOPlatformPlugin::prepareSymbolTableRegistration(
   // those names.
   {
     SmallVector<jitlink::Symbol *> SymsToProcess;
-    for (auto *Sym : G.defined_symbols())
-      SymsToProcess.push_back(Sym);
-    for (auto *Sym : G.absolute_symbols())
-      SymsToProcess.push_back(Sym);
+    llvm::append_range(SymsToProcess, G.defined_symbols());
+    llvm::append_range(SymsToProcess, G.absolute_symbols());
 
     for (auto *Sym : SymsToProcess) {
       if (!Sym->hasName())
diff --git a/llvm/lib/ExecutionEngine/Orc/SimpleRemoteEPC.cpp b/llvm/lib/ExecutionEngine/Orc/SimpleRemoteEPC.cpp
index 53d5e049798aa..3d816785cb76d 100644
--- a/llvm/lib/ExecutionEngine/Orc/SimpleRemoteEPC.cpp
+++ b/llvm/lib/ExecutionEngine/Orc/SimpleRemoteEPC.cpp
@@ -47,8 +47,7 @@ lookupSymbolsAsyncHelper(EPCGenericDylibManager &DylibMgr,
                            return Complete(R.takeError());
                          Result.push_back({});
                          Result.back().reserve(R->size());
-                         for (auto Addr : *R)
-                           Result.back().push_back(Addr);
+                         llvm::append_range(Result.back(), *R);
 
                          lookupSymbolsAsyncHelper(
                              DylibMgr, Request.drop_front(), std::move(Result),