Revert "[ADT] Make Twine's copy constructor private."

This reverts commit 4e4ee1c507e2707bb3c208e1e1b6551c3015cbf5.

This is failing due to some code that isn't built on MSVC
so I didn't catch.  Not immediately obvious how to fix this
at first glance, so I'm reverting for now.

llvm-svn: 315536

5 files changed, 10 insertions, 10 deletions

diff --git a/llvm/tools/llvm-nm/llvm-nm.cpp b/llvm/tools/llvm-nm/llvm-nm.cpp
index 6b9ae463979..4ad0d95d67f 100644
--- a/llvm/tools/llvm-nm/llvm-nm.cpp
+++ b/llvm/tools/llvm-nm/llvm-nm.cpp
@@ -195,12 +195,12 @@ bool HadError = false;
 std::string ToolName;
 } // anonymous namespace
 
-static void error(const Twine &Message, const Twine &Path = Twine()) {
+static void error(Twine Message, Twine Path = Twine()) {
   HadError = true;
   errs() << ToolName << ": " << Path << ": " << Message << ".\n";
 }
 
-static bool error(std::error_code EC, const Twine &Path = Twine()) {
+static bool error(std::error_code EC, Twine Path = Twine()) {
   if (EC) {
     error(EC.message(), Path);
     return true;
diff --git a/llvm/tools/llvm-objcopy/Object.cpp b/llvm/tools/llvm-objcopy/Object.cpp
index f4c159cd1cb..f9acf001ae9 100644
--- a/llvm/tools/llvm-objcopy/Object.cpp
+++ b/llvm/tools/llvm-objcopy/Object.cpp
@@ -428,15 +428,15 @@ void initRelocations(RelocationSection<ELFT> *Relocs,
   }
 }
 
-SectionBase *SectionTableRef::getSection(uint16_t Index, const Twine &ErrMsg) {
+SectionBase *SectionTableRef::getSection(uint16_t Index, Twine ErrMsg) {
   if (Index == SHN_UNDEF || Index > Sections.size())
     error(ErrMsg);
   return Sections[Index - 1].get();
 }
 
 template <class T>
-T *SectionTableRef::getSectionOfType(uint16_t Index, const Twine &IndexErrMsg,
-                                     const Twine &TypeErrMsg) {
+T *SectionTableRef::getSectionOfType(uint16_t Index, Twine IndexErrMsg,
+                                     Twine TypeErrMsg) {
   if (T *Sec = llvm::dyn_cast<T>(getSection(Index, IndexErrMsg)))
     return Sec;
   error(TypeErrMsg);
diff --git a/llvm/tools/llvm-objcopy/Object.h b/llvm/tools/llvm-objcopy/Object.h
index d266912db0b..f6088434805 100644
--- a/llvm/tools/llvm-objcopy/Object.h
+++ b/llvm/tools/llvm-objcopy/Object.h
@@ -29,11 +29,11 @@ public:
       : Sections(Secs) {}
   SectionTableRef(const SectionTableRef &) = default;
 
-  SectionBase *getSection(uint16_t Index, const llvm::Twine &ErrMsg);
+  SectionBase *getSection(uint16_t Index, llvm::Twine ErrMsg);
 
   template <class T>
-  T *getSectionOfType(uint16_t Index, const llvm::Twine &IndexErrMsg,
-                      const llvm::Twine &TypeErrMsg);
+  T *getSectionOfType(uint16_t Index, llvm::Twine IndexErrMsg,
+                      llvm::Twine TypeErrMsg);
 };
 
 class SectionBase {
diff --git a/llvm/tools/llvm-objcopy/llvm-objcopy.cpp b/llvm/tools/llvm-objcopy/llvm-objcopy.cpp
index 9fc2897959c..7f55a434b33 100644
--- a/llvm/tools/llvm-objcopy/llvm-objcopy.cpp
+++ b/llvm/tools/llvm-objcopy/llvm-objcopy.cpp
@@ -27,7 +27,7 @@ static StringRef ToolName;
 
 namespace llvm {
 
-LLVM_ATTRIBUTE_NORETURN void error(const Twine &Message) {
+LLVM_ATTRIBUTE_NORETURN void error(Twine Message) {
   errs() << ToolName << ": " << Message << ".\n";
   errs().flush();
   exit(1);
diff --git a/llvm/tools/llvm-objcopy/llvm-objcopy.h b/llvm/tools/llvm-objcopy/llvm-objcopy.h
index d30b43a46a4..de7bf367ac8 100644
--- a/llvm/tools/llvm-objcopy/llvm-objcopy.h
+++ b/llvm/tools/llvm-objcopy/llvm-objcopy.h
@@ -14,7 +14,7 @@
 
 namespace llvm {
 
-LLVM_ATTRIBUTE_NORETURN extern void error(const Twine &Message);
+LLVM_ATTRIBUTE_NORETURN extern void error(Twine Message);
 
 // This is taken from llvm-readobj.
 // [see here](llvm/tools/llvm-readobj/llvm-readobj.h:38)