[PATCH] D37652: Remove unneccessary string copies from method invocations.

[Vlad Tsyrklevich via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL312994: Remove unneccessary string copies from method invocations. (authored by vlad.tsyrklevich).

Changed prior to commit:
  https://reviews.llvm.org/D37652?vs=114721&id=114755#toc

Repository:
  rL LLVM

https://reviews.llvm.org/D37652

Files:
  llvm/trunk/tools/llvm-objdump/llvm-objdump.cpp


Index: llvm/trunk/tools/llvm-objdump/llvm-objdump.cpp
===================================================================
--- llvm/trunk/tools/llvm-objdump/llvm-objdump.cpp
+++ llvm/trunk/tools/llvm-objdump/llvm-objdump.cpp
@@ -418,30 +418,30 @@
 class SourcePrinter {
 protected:
   DILineInfo OldLineInfo;
-  const ObjectFile *Obj;
+  const ObjectFile *Obj = nullptr;
   std::unique_ptr<symbolize::LLVMSymbolizer> Symbolizer;
   // File name to file contents of source
   std::unordered_map<std::string, std::unique_ptr<MemoryBuffer>> SourceCache;
   // Mark the line endings of the cached source
   std::unordered_map<std::string, std::vector<StringRef>> LineCache;
 
 private:
-  bool cacheSource(std::string File);
+  bool cacheSource(const std::string& File);
 
 public:
-  virtual ~SourcePrinter() {}
-  SourcePrinter() : Obj(nullptr), Symbolizer(nullptr) {}
+  SourcePrinter() = default;
   SourcePrinter(const ObjectFile *Obj, StringRef DefaultArch) : Obj(Obj) {
     symbolize::LLVMSymbolizer::Options SymbolizerOpts(
         DILineInfoSpecifier::FunctionNameKind::None, true, false, false,
         DefaultArch);
     Symbolizer.reset(new symbolize::LLVMSymbolizer(SymbolizerOpts));
   }
+  virtual ~SourcePrinter() = default;
   virtual void printSourceLine(raw_ostream &OS, uint64_t Address,
                                StringRef Delimiter = "; ");
 };
 
-bool SourcePrinter::cacheSource(std::string File) {
+bool SourcePrinter::cacheSource(const std::string& File) {
   auto BufferOrError = MemoryBuffer::getFile(File);
   if (!BufferOrError)
     return false;
@@ -509,7 +509,7 @@
 
 class PrettyPrinter {
 public:
-  virtual ~PrettyPrinter(){}
+  virtual ~PrettyPrinter() = default;
   virtual void printInst(MCInstPrinter &IP, const MCInst *MI,
                          ArrayRef<uint8_t> Bytes, uint64_t Address,
                          raw_ostream &OS, StringRef Annot,


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