diff --git a/llvm/include/llvm/CodeGen/MachineInstr.h b/llvm/include/llvm/CodeGen/MachineInstr.h
index 4fcb7f36e0238..ca984459c365a 100644
--- a/llvm/include/llvm/CodeGen/MachineInstr.h
+++ b/llvm/include/llvm/CodeGen/MachineInstr.h
@@ -185,8 +185,7 @@ class MachineInstr
                     HasHeapAllocMarker, HasPCSections, HasCFIType, HasMMRAs);
 
       // Copy the actual data into the trailing objects.
-      std::copy(MMOs.begin(), MMOs.end(),
-                Result->getTrailingObjects<MachineMemOperand *>());
+      llvm::copy(MMOs, Result->getTrailingObjects<MachineMemOperand *>());
 
       unsigned MDNodeIdx = 0;
 
diff --git a/llvm/include/llvm/CodeGen/RegAllocPBQP.h b/llvm/include/llvm/CodeGen/RegAllocPBQP.h
index 234f1c6ff115a..625c40ed8f8d2 100644
--- a/llvm/include/llvm/CodeGen/RegAllocPBQP.h
+++ b/llvm/include/llvm/CodeGen/RegAllocPBQP.h
@@ -100,7 +100,7 @@ class AllowedRegVector {
 
   AllowedRegVector(const std::vector<MCRegister> &OptVec)
       : NumOpts(OptVec.size()), Opts(new MCRegister[NumOpts]) {
-    std::copy(OptVec.begin(), OptVec.end(), Opts.get());
+    llvm::copy(OptVec, Opts.get());
   }
 
   unsigned size() const { return NumOpts; }
diff --git a/llvm/include/llvm/IR/PredIteratorCache.h b/llvm/include/llvm/IR/PredIteratorCache.h
index ba3228347076b..96f546011b3a3 100644
--- a/llvm/include/llvm/IR/PredIteratorCache.h
+++ b/llvm/include/llvm/IR/PredIteratorCache.h
@@ -40,7 +40,7 @@ class PredIteratorCache {
 
     SmallVector<BasicBlock *, 32> PredCache(predecessors(BB));
     BasicBlock **Data = Memory.Allocate<BasicBlock *>(PredCache.size());
-    std::copy(PredCache.begin(), PredCache.end(), Data);
+    llvm::copy(PredCache, Data);
     Entry = ArrayRef(Data, PredCache.size());
     return Entry;
   }
diff --git a/llvm/lib/ObjCopy/COFF/COFFObject.h b/llvm/lib/ObjCopy/COFF/COFFObject.h
index 6b70add1bb1b7..1c04b7f64f3a0 100644
--- a/llvm/lib/ObjCopy/COFF/COFFObject.h
+++ b/llvm/lib/ObjCopy/COFF/COFFObject.h
@@ -69,7 +69,7 @@ struct Section {
 struct AuxSymbol {
   AuxSymbol(ArrayRef<uint8_t> In) {
     assert(In.size() == sizeof(Opaque));
-    std::copy(In.begin(), In.end(), Opaque);
+    llvm::copy(In, Opaque);
   }
 
   ArrayRef<uint8_t> getRef() const {
diff --git a/llvm/lib/ObjCopy/ELF/ELFObjcopy.cpp b/llvm/lib/ObjCopy/ELF/ELFObjcopy.cpp
index f810bbf639300..edb6ae0a5b108 100644
--- a/llvm/lib/ObjCopy/ELF/ELFObjcopy.cpp
+++ b/llvm/lib/ObjCopy/ELF/ELFObjcopy.cpp
@@ -198,8 +198,7 @@ static Error dumpSectionToFile(StringRef SecName, StringRef Filename,
       if (!BufferOrErr)
         return createFileError(Filename, BufferOrErr.takeError());
       std::unique_ptr<FileOutputBuffer> Buf = std::move(*BufferOrErr);
-      std::copy(Sec.OriginalData.begin(), Sec.OriginalData.end(),
-                Buf->getBufferStart());
+      llvm::copy(Sec.OriginalData, Buf->getBufferStart());
       if (Error E = Buf->commit())
         return createFileError(Filename, std::move(E));
       return Error::success();
diff --git a/llvm/lib/ObjCopy/ELF/ELFObject.cpp b/llvm/lib/ObjCopy/ELF/ELFObject.cpp
index 78b674c5fa348..641966a867102 100644
--- a/llvm/lib/ObjCopy/ELF/ELFObject.cpp
+++ b/llvm/lib/ObjCopy/ELF/ELFObject.cpp
@@ -536,7 +536,7 @@ Error ELFSectionWriter<ELFT>::visit(const CompressedSection &Sec) {
   Elf_Chdr_Impl<ELFT> Chdr = {};
   switch (Sec.CompressionType) {
   case DebugCompressionType::None:
-    std::copy(Sec.OriginalData.begin(), Sec.OriginalData.end(), Buf);
+    llvm::copy(Sec.OriginalData, Buf);
     return Error::success();
   case DebugCompressionType::Zlib:
     Chdr.ch_type = ELF::ELFCOMPRESS_ZLIB;
@@ -550,7 +550,7 @@ Error ELFSectionWriter<ELFT>::visit(const CompressedSection &Sec) {
   memcpy(Buf, &Chdr, sizeof(Chdr));
   Buf += sizeof(Chdr);
 
-  std::copy(Sec.CompressedData.begin(), Sec.CompressedData.end(), Buf);
+  llvm::copy(Sec.CompressedData, Buf);
   return Error::success();
 }
 
diff --git a/llvm/lib/Object/COFFImportFile.cpp b/llvm/lib/Object/COFFImportFile.cpp
index 595533ff94725..5ef5ea310766f 100644
--- a/llvm/lib/Object/COFFImportFile.cpp
+++ b/llvm/lib/Object/COFFImportFile.cpp
@@ -161,7 +161,7 @@ static void writeStringTable(std::vector<uint8_t> &B,
 
   for (const auto &S : Strings) {
     B.resize(Pos + S.length() + 1);
-    std::copy(S.begin(), S.end(), std::next(B.begin(), Pos));
+    llvm::copy(S, std::next(B.begin(), Pos));
     B[Pos + S.length()] = 0;
     Pos += S.length() + 1;
   }
diff --git a/llvm/lib/ObjectYAML/COFFEmitter.cpp b/llvm/lib/ObjectYAML/COFFEmitter.cpp
index b21197105cbde..8ba9e44c15385 100644
--- a/llvm/lib/ObjectYAML/COFFEmitter.cpp
+++ b/llvm/lib/ObjectYAML/COFFEmitter.cpp
@@ -99,7 +99,7 @@ struct COFFParser {
       // store it in the string table.
       StringRef Name = Sym.Name;
       if (Name.size() <= COFF::NameSize) {
-        std::copy(Name.begin(), Name.end(), Sym.Header.Name);
+        llvm::copy(Name, Sym.Header.Name);
       } else {
         // Add string to the string table and format the index for output.
         unsigned Index = getStringIndex(Name);
diff --git a/llvm/lib/ProfileData/Coverage/CoverageMappingReader.cpp b/llvm/lib/ProfileData/Coverage/CoverageMappingReader.cpp
index 075ad8d7aec8b..8ce0e9f62666c 100644
--- a/llvm/lib/ProfileData/Coverage/CoverageMappingReader.cpp
+++ b/llvm/lib/ProfileData/Coverage/CoverageMappingReader.cpp
@@ -1232,8 +1232,7 @@ loadBinaryFormat(std::unique_ptr<Binary> Bin, StringRef Arch,
       if (!CoverageRecordsOrErr)
         return CoverageRecordsOrErr.takeError();
       const auto &CoverageRecords = CoverageRecordsOrErr.get();
-      FuncRecordsBuffer = std::copy(CoverageRecords.begin(),
-                                    CoverageRecords.end(), FuncRecordsBuffer);
+      FuncRecordsBuffer = llvm::copy(CoverageRecords, FuncRecordsBuffer);
       FuncRecordsBuffer =
           std::fill_n(FuncRecordsBuffer,
                       alignAddr(FuncRecordsBuffer, RecordAlignment) -
diff --git a/llvm/lib/Support/Mustache.cpp b/llvm/lib/Support/Mustache.cpp
index 8b95049eb9648..f27a647b9c67d 100644
--- a/llvm/lib/Support/Mustache.cpp
+++ b/llvm/lib/Support/Mustache.cpp
@@ -75,7 +75,7 @@ static Accessor splitMustacheString(StringRef Str, MustacheContext &Ctx) {
   // Now, allocate memory for the array of StringRefs in the arena.
   StringRef *ArenaTokens = Ctx.Allocator.Allocate<StringRef>(Tokens.size());
   // Copy the StringRefs from the stack vector to the arena.
-  std::copy(Tokens.begin(), Tokens.end(), ArenaTokens);
+  llvm::copy(Tokens, ArenaTokens);
   // Return an ArrayRef pointing to the stable arena memory.
   return ArrayRef<StringRef>(ArenaTokens, Tokens.size());
 }
diff --git a/llvm/lib/Target/Hexagon/HexagonISelDAGToDAGHVX.cpp b/llvm/lib/Target/Hexagon/HexagonISelDAGToDAGHVX.cpp
index 3cc146b13f8f8..728ffefe5bd9e 100644
--- a/llvm/lib/Target/Hexagon/HexagonISelDAGToDAGHVX.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonISelDAGToDAGHVX.cpp
@@ -811,8 +811,8 @@ ArrayRef<int> hi(ArrayRef<int> Vuu) { return Vuu.take_back(Vuu.size() / 2); }
 MaskT vshuffvdd(ArrayRef<int> Vu, ArrayRef<int> Vv, unsigned Rt) {
   int Len = Vu.size();
   MaskT Vdd(2 * Len);
-  std::copy(Vv.begin(), Vv.end(), Vdd.begin());
-  std::copy(Vu.begin(), Vu.end(), Vdd.begin() + Len);
+  llvm::copy(Vv, Vdd.begin());
+  llvm::copy(Vu, Vdd.begin() + Len);
 
   auto Vd0 = MutableArrayRef<int>(Vdd).take_front(Len);
   auto Vd1 = MutableArrayRef<int>(Vdd).take_back(Len);
@@ -831,8 +831,8 @@ MaskT vshuffvdd(ArrayRef<int> Vu, ArrayRef<int> Vv, unsigned Rt) {
 MaskT vdealvdd(ArrayRef<int> Vu, ArrayRef<int> Vv, unsigned Rt) {
   int Len = Vu.size();
   MaskT Vdd(2 * Len);
-  std::copy(Vv.begin(), Vv.end(), Vdd.begin());
-  std::copy(Vu.begin(), Vu.end(), Vdd.begin() + Len);
+  llvm::copy(Vv, Vdd.begin());
+  llvm::copy(Vu, Vdd.begin() + Len);
 
   auto Vd0 = MutableArrayRef<int>(Vdd).take_front(Len);
   auto Vd1 = MutableArrayRef<int>(Vdd).take_back(Len);
diff --git a/llvm/tools/lli/lli.cpp b/llvm/tools/lli/lli.cpp
index 017e2102348b7..f1cf87fc88cee 100644
--- a/llvm/tools/lli/lli.cpp
+++ b/llvm/tools/lli/lli.cpp
@@ -1228,15 +1228,15 @@ static Expected<std::unique_ptr<orc::ExecutorProcessControl>> launchRemote() {
     std::unique_ptr<char[]> ChildPath, ChildIn, ChildOut;
     {
       ChildPath.reset(new char[ChildExecPath.size() + 1]);
-      std::copy(ChildExecPath.begin(), ChildExecPath.end(), &ChildPath[0]);
+      llvm::copy(ChildExecPath, &ChildPath[0]);
       ChildPath[ChildExecPath.size()] = '\0';
       std::string ChildInStr = utostr(PipeFD[0][0]);
       ChildIn.reset(new char[ChildInStr.size() + 1]);
-      std::copy(ChildInStr.begin(), ChildInStr.end(), &ChildIn[0]);
+      llvm::copy(ChildInStr, &ChildIn[0]);
       ChildIn[ChildInStr.size()] = '\0';
       std::string ChildOutStr = utostr(PipeFD[1][1]);
       ChildOut.reset(new char[ChildOutStr.size() + 1]);
-      std::copy(ChildOutStr.begin(), ChildOutStr.end(), &ChildOut[0]);
+      llvm::copy(ChildOutStr, &ChildOut[0]);
       ChildOut[ChildOutStr.size()] = '\0';
     }
 
diff --git a/llvm/tools/llvm-readobj/COFFDumper.cpp b/llvm/tools/llvm-readobj/COFFDumper.cpp
index 73115fbb7e55e..55e106d8ea6ac 100644
--- a/llvm/tools/llvm-readobj/COFFDumper.cpp
+++ b/llvm/tools/llvm-readobj/COFFDumper.cpp
@@ -2330,8 +2330,7 @@ void COFFDumper::printResourceDirectoryTable(
       std::vector<UTF16> EndianCorrectedNameString;
       if (llvm::sys::IsBigEndianHost) {
         EndianCorrectedNameString.resize(RawEntryNameString.size() + 1);
-        std::copy(RawEntryNameString.begin(), RawEntryNameString.end(),
-                  EndianCorrectedNameString.begin() + 1);
+        llvm::copy(RawEntryNameString, EndianCorrectedNameString.begin() + 1);
         EndianCorrectedNameString[0] = UNI_UTF16_BYTE_ORDER_MARK_SWAPPED;
         RawEntryNameString = ArrayRef(EndianCorrectedNameString);
       }
diff --git a/llvm/unittests/Object/ELFTypesTest.cpp b/llvm/unittests/Object/ELFTypesTest.cpp
index 9e99b4a6d7bf3..1c00c9f3c55bd 100644
--- a/llvm/unittests/Object/ELFTypesTest.cpp
+++ b/llvm/unittests/Object/ELFTypesTest.cpp
@@ -32,7 +32,7 @@ template <class ELFT> struct NoteTestData {
     Nhdr->n_type = Type;
 
     auto NameOffset = Data.begin() + sizeof(*Nhdr);
-    std::copy(Name.begin(), Name.end(), NameOffset);
+    llvm::copy(Name, NameOffset);
 
     auto DescOffset =
         Data.begin() + alignTo(sizeof(*Nhdr) + Nhdr->n_namesz, Align);
diff --git a/llvm/unittests/Support/Path.cpp b/llvm/unittests/Support/Path.cpp
index eb649defc0021..51f65bf6824ec 100644
--- a/llvm/unittests/Support/Path.cpp
+++ b/llvm/unittests/Support/Path.cpp
@@ -1428,7 +1428,7 @@ TEST_F(FileSystemTest, FileMapping) {
     fs::mapped_file_region mfr(fs::convertFDToNativeFile(FileDescriptor),
                                fs::mapped_file_region::readwrite, Size, 0, EC);
     ASSERT_NO_ERROR(EC);
-    std::copy(Val.begin(), Val.end(), mfr.data());
+    llvm::copy(Val, mfr.data());
     // Explicitly add a 0.
     mfr.data()[Val.size()] = 0;
 
@@ -1494,7 +1494,7 @@ TEST_F(FileSystemTest, FileMappingSync) {
 
     // Write content through mapped memory.
     ASSERT_NO_ERROR(EC);
-    std::copy(Content.begin(), Content.end(), MFR.data());
+    llvm::copy(Content, MFR.data());
 
     // Synchronize to file system.
     ASSERT_FALSE((bool)MFR.sync());