[llvm] Drop unnecessary const from return types (NFC)

Identified with const-return-type.

include/llvm/Analysis/DDG.h

@@ -275,7 +275,7 @@ public:
   virtual ~DependenceGraphInfo() {}
 
   /// Return the label that is used to name this graph.
-  const StringRef getName() const { return Name; }
+  StringRef getName() const { return Name; }
 
   /// Return the root node of the graph.
   NodeType &getRoot() const {

include/llvm/Analysis/LoopCacheAnalysis.h

@@ -205,7 +205,7 @@ public:
   }
 
   /// Return the estimated ordered loop costs.
-  const ArrayRef<LoopCacheCostTy> getLoopCosts() const { return LoopCosts; }
+  ArrayRef<LoopCacheCostTy> getLoopCosts() const { return LoopCosts; }
 
 private:
   /// Calculate the cache footprint of each loop in the nest (when it is

include/llvm/IR/DerivedTypes.h

@@ -318,7 +318,7 @@ public:
 
   element_iterator element_begin() const { return ContainedTys; }
   element_iterator element_end() const { return &ContainedTys[NumContainedTys];}
-  ArrayRef<Type *> const elements() const {
+  ArrayRef<Type *> elements() const {
     return makeArrayRef(element_begin(), element_end());
   }
 

include/llvm/MCA/Instruction.h

@@ -412,9 +412,9 @@ public:
   InstructionBase(const InstrDesc &D) : Desc(D), IsOptimizableMove(false) {}
 
   SmallVectorImpl<WriteState> &getDefs() { return Defs; }
-  const ArrayRef<WriteState> getDefs() const { return Defs; }
+  ArrayRef<WriteState> getDefs() const { return Defs; }
   SmallVectorImpl<ReadState> &getUses() { return Uses; }
-  const ArrayRef<ReadState> getUses() const { return Uses; }
+  ArrayRef<ReadState> getUses() const { return Uses; }
   const InstrDesc &getDesc() const { return Desc; }
 
   unsigned getLatency() const { return Desc.MaxLatency; }

include/llvm/Object/WindowsResource.h

@@ -160,10 +160,8 @@ public:
   void cleanUpManifests(std::vector<std::string> &Duplicates);
   void printTree(raw_ostream &OS) const;
   const TreeNode &getTree() const { return Root; }
-  const ArrayRef<std::vector<uint8_t>> getData() const { return Data; }
-  const ArrayRef<std::vector<UTF16>> getStringTable() const {
-    return StringTable;
-  }
+  ArrayRef<std::vector<uint8_t>> getData() const { return Data; }
+  ArrayRef<std::vector<UTF16>> getStringTable() const { return StringTable; }
 
   class TreeNode {
   public:

include/llvm/TableGen/DirectiveEmitter.h

@@ -93,7 +93,7 @@ public:
   bool isDefault() const { return Def->getValueAsBit("isDefault"); }
 
   // Returns the record name.
-  const StringRef getRecordName() const { return Def->getName(); }
+  StringRef getRecordName() const { return Def->getName(); }
 
 protected:
   const llvm::Record *Def;

include/llvm/Transforms/IPO/SampleContextTracker.h

@@ -53,7 +53,7 @@ public:
                                       bool DeleteNode = true);
   void removeChildContext(const LineLocation &CallSite, StringRef CalleeName);
   std::map<uint32_t, ContextTrieNode> &getAllChildContext();
-  const StringRef getFuncName() const;
+  StringRef getFuncName() const;
   FunctionSamples *getFunctionSamples() const;
   void setFunctionSamples(FunctionSamples *FSamples);
   LineLocation getCallSiteLoc() const;

lib/Target/X86/X86MachineFunctionInfo.h

@@ -219,7 +219,7 @@ public:
     PreallocatedArgOffsets[Id].assign(AO.begin(), AO.end());
   }
 
-  const ArrayRef<size_t> getPreallocatedArgOffsets(const size_t Id) {
+  ArrayRef<size_t> getPreallocatedArgOffsets(const size_t Id) {
     assert(!PreallocatedArgOffsets[Id].empty() && "arg offsets not set");
     return PreallocatedArgOffsets[Id];
   }

lib/Transforms/IPO/SampleContextTracker.cpp

@@ -113,7 +113,7 @@ std::map<uint32_t, ContextTrieNode> &ContextTrieNode::getAllChildContext() {
   return AllChildContext;
 }
 
-const StringRef ContextTrieNode::getFuncName() const { return FuncName; }
+StringRef ContextTrieNode::getFuncName() const { return FuncName; }
 
 FunctionSamples *ContextTrieNode::getFunctionSamples() const {
   return FuncSamples;

tools/dsymutil/DebugMap.h

@@ -114,9 +114,7 @@ public:
 
   const Triple &getTriple() const { return BinaryTriple; }
 
-  const ArrayRef<uint8_t> getUUID() const {
-    return ArrayRef<uint8_t>(BinaryUUID);
-  }
+  ArrayRef<uint8_t> getUUID() const { return ArrayRef<uint8_t>(BinaryUUID); }
 
   StringRef getBinaryPath() const { return BinaryPath; }
 

tools/llvm-profgen/ProfiledBinary.h

@@ -179,8 +179,8 @@ public:
   uint64_t offsetToVirtualAddr(uint64_t Offset) const {
     return Offset + BaseAddress;
   }
-  const StringRef getPath() const { return Path; }
-  const StringRef getName() const { return llvm::sys::path::filename(Path); }
+  StringRef getPath() const { return Path; }
+  StringRef getName() const { return llvm::sys::path::filename(Path); }
   uint64_t getBaseAddress() const { return BaseAddress; }
   void setBaseAddress(uint64_t Address) { BaseAddress = Address; }
   uint64_t getPreferredBaseAddress() const { return PreferredBaseAddress; }

tools/llvm-readobj/ELFDumper.cpp

@@ -5141,8 +5141,7 @@ static const NoteType CoreNoteTypes[] = {
 };
 
 template <class ELFT>
-const StringRef getNoteTypeName(const typename ELFT::Note &Note,
-                                unsigned ELFType) {
+StringRef getNoteTypeName(const typename ELFT::Note &Note, unsigned ELFType) {
   uint32_t Type = Note.getType();
   auto FindNote = [&](ArrayRef<NoteType> V) -> StringRef {
     for (const NoteType &N : V)