[llvm-readobj] - Remove code duplication when printing dynamic relocations. NFCI.

[grimar]

Summary

LLVM style code can be simplified to avoid the duplication of logic
related to printing dynamic relocations.

Depends on D87087

[jhenderson]

LGTM.

llvm/tools/llvm-readobj/ELFDumper.cpp

public:
   void printMipsABIFlags(const ELFObjectFile<ELFT> *Obj) override;
 
 private:
   void printReloc(const Relocation<ELFT> &R, unsigned RelIndex,
                   const Elf_Shdr &Sec, const Elf_Shdr *SymTab) override;
   void printRelrReloc(const Elf_Relr &R) override;
   void printDynamicReloc(const Relocation<ELFT> &R) override;
 
+  void printRelRelaReloc(const Relocation<ELFT> &R, StringRef SymbolName);
   void printSymbols();
   void printDynamicSymbols();
   void printSymbolSection(const Elf_Sym *Symbol, const Elf_Sym *First);
   void printSymbol(const Elf_Sym *Symbol, const Elf_Sym *First,
                    Optional<StringRef> StrTable, bool IsDynamic,
                    bool /*NonVisibilityBitsUsed*/) override;
   void printProgramHeaders();
   void printSectionMapping() {}
Expected<RelSymbol<ELFT>> Target =
       this->dumper()->getRelocationTarget(R, SymTab);
   if (!Target) {
     this->reportUniqueWarning(createError(
         "unable to print relocation " + Twine(RelIndex) + " in " +
         describe(this->Obj, Sec) + ": " + toString(Target.takeError())));
     return;
   }
 
-  std::string TargetName = Target->Name;
+  printRelRelaReloc(R, Target->Name);
+}
+
+template <class ELFT>
+void LLVMStyle<ELFT>::printRelRelaReloc(const Relocation<ELFT> &R,
+                                        StringRef SymbolName) {
   SmallString<32> RelocName;
   this->Obj.getRelocationTypeName(R.Type, RelocName);
 
   uintX_t Addend = R.Addend.getValueOr(0);
   if (opts::ExpandRelocs) {
     DictScope Group(W, "Relocation");
     W.printHex("Offset", R.Offset);
     W.printNumber("Type", RelocName, R.Type);
-    W.printNumber("Symbol", !TargetName.empty() ? TargetName : "-", R.Symbol);
+    W.printNumber("Symbol", !SymbolName.empty() ? SymbolName : "-", R.Symbol);
     W.printHex("Addend", Addend);
   } else {
     raw_ostream &OS = W.startLine();
     OS << W.hex(R.Offset) << " " << RelocName << " "
-       << (!TargetName.empty() ? TargetName : "-") << " " << W.hex(Addend)
+       << (!SymbolName.empty() ? SymbolName : "-") << " " << W.hex(Addend)
        << "\n";
   }
 }
 
 template <class ELFT> void LLVMStyle<ELFT>::printSectionHeaders() {
   ListScope SectionsD(W, "Sections");
 
   int SectionIndex = -1;
template <class ELFT> void LLVMStyle<ELFT>::printDynamicRelocations() {
   W.indent();
   this->printDynamicRelocationsHelper();
   W.unindent();
   W.startLine() << "}\n";
 }
 
 template <class ELFT>
 void LLVMStyle<ELFT>::printDynamicReloc(const Relocation<ELFT> &R) {
-  SmallString<32> RelocName;
-  this->Obj.getRelocationTypeName(R.Type, RelocName);
-  std::string SymbolName =
-      getSymbolForReloc(this->Obj, this->FileName, this->dumper(), R).Name;
-
-  uintX_t Addend = R.Addend.getValueOr(0);
-  if (opts::ExpandRelocs) {
-    DictScope Group(W, "Relocation");
-    W.printHex("Offset", R.Offset);
-    W.printNumber("Type", RelocName, R.Type);
-    W.printString("Symbol", !SymbolName.empty() ? SymbolName : "-");
-    W.printHex("Addend", Addend);
-  } else {
-    raw_ostream &OS = W.startLine();
-    OS << W.hex(R.Offset) << " " << RelocName << " "
-       << (!SymbolName.empty() ? SymbolName : "-") << " " << W.hex(Addend)
-       << "\n";
-  }
+  RelSymbol<ELFT> S =
+      getSymbolForReloc(this->Obj, this->FileName, this->dumper(), R);
+  printRelRelaReloc(R, S.Name);
 }
 
 template <class ELFT>
 void LLVMStyle<ELFT>::printProgramHeaders(
     bool PrintProgramHeaders, cl::boolOrDefault PrintSectionMapping) {
   if (PrintProgramHeaders)
     printProgramHeaders();
   if (PrintSectionMapping == cl::BOU_TRUE)