[C++] Use 'nullptr'.

llvm-svn: 207394
diff --git a/llvm/lib/ExecutionEngine/Interpreter/Execution.cpp b/llvm/lib/ExecutionEngine/Interpreter/Execution.cpp
index 2275f57..93bb2d1 100644
--- a/llvm/lib/ExecutionEngine/Interpreter/Execution.cpp
+++ b/llvm/lib/ExecutionEngine/Interpreter/Execution.cpp
@@ -58,7 +58,7 @@
     IMPLEMENT_BINARY_OPERATOR(+, Double);
   default:
     dbgs() << "Unhandled type for FAdd instruction: " << *Ty << "\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
 }
 
@@ -69,7 +69,7 @@
     IMPLEMENT_BINARY_OPERATOR(-, Double);
   default:
     dbgs() << "Unhandled type for FSub instruction: " << *Ty << "\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
 }
 
@@ -80,7 +80,7 @@
     IMPLEMENT_BINARY_OPERATOR(*, Double);
   default:
     dbgs() << "Unhandled type for FMul instruction: " << *Ty << "\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
 }
 
@@ -91,7 +91,7 @@
     IMPLEMENT_BINARY_OPERATOR(/, Double);
   default:
     dbgs() << "Unhandled type for FDiv instruction: " << *Ty << "\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
 }
 
@@ -106,7 +106,7 @@
     break;
   default:
     dbgs() << "Unhandled type for Rem instruction: " << *Ty << "\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
 }
 
@@ -143,7 +143,7 @@
     IMPLEMENT_POINTER_ICMP(==);
   default:
     dbgs() << "Unhandled type for ICMP_EQ predicate: " << *Ty << "\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
   return Dest;
 }
@@ -157,7 +157,7 @@
     IMPLEMENT_POINTER_ICMP(!=);
   default:
     dbgs() << "Unhandled type for ICMP_NE predicate: " << *Ty << "\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
   return Dest;
 }
@@ -171,7 +171,7 @@
     IMPLEMENT_POINTER_ICMP(<);
   default:
     dbgs() << "Unhandled type for ICMP_ULT predicate: " << *Ty << "\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
   return Dest;
 }
@@ -185,7 +185,7 @@
     IMPLEMENT_POINTER_ICMP(<);
   default:
     dbgs() << "Unhandled type for ICMP_SLT predicate: " << *Ty << "\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
   return Dest;
 }
@@ -199,7 +199,7 @@
     IMPLEMENT_POINTER_ICMP(>);
   default:
     dbgs() << "Unhandled type for ICMP_UGT predicate: " << *Ty << "\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
   return Dest;
 }
@@ -213,7 +213,7 @@
     IMPLEMENT_POINTER_ICMP(>);
   default:
     dbgs() << "Unhandled type for ICMP_SGT predicate: " << *Ty << "\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
   return Dest;
 }
@@ -227,7 +227,7 @@
     IMPLEMENT_POINTER_ICMP(<=);
   default:
     dbgs() << "Unhandled type for ICMP_ULE predicate: " << *Ty << "\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
   return Dest;
 }
@@ -241,7 +241,7 @@
     IMPLEMENT_POINTER_ICMP(<=);
   default:
     dbgs() << "Unhandled type for ICMP_SLE predicate: " << *Ty << "\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
   return Dest;
 }
@@ -255,7 +255,7 @@
     IMPLEMENT_POINTER_ICMP(>=);
   default:
     dbgs() << "Unhandled type for ICMP_UGE predicate: " << *Ty << "\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
   return Dest;
 }
@@ -269,7 +269,7 @@
     IMPLEMENT_POINTER_ICMP(>=);
   default:
     dbgs() << "Unhandled type for ICMP_SGE predicate: " << *Ty << "\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
   return Dest;
 }
@@ -294,7 +294,7 @@
   case ICmpInst::ICMP_SGE: R = executeICMP_SGE(Src1, Src2, Ty); break;
   default:
     dbgs() << "Don't know how to handle this ICmp predicate!\n-->" << I;
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
  
   SetValue(&I, R, SF);
@@ -330,7 +330,7 @@
     IMPLEMENT_VECTOR_FCMP(==);
   default:
     dbgs() << "Unhandled type for FCmp EQ instruction: " << *Ty << "\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
   return Dest;
 }
@@ -386,7 +386,7 @@
     IMPLEMENT_VECTOR_FCMP(!=);
     default:
       dbgs() << "Unhandled type for FCmp NE instruction: " << *Ty << "\n";
-      llvm_unreachable(0);
+      llvm_unreachable(nullptr);
   }
   // in vector case mask out NaN elements
   if (Ty->isVectorTy())
@@ -406,7 +406,7 @@
     IMPLEMENT_VECTOR_FCMP(<=);
   default:
     dbgs() << "Unhandled type for FCmp LE instruction: " << *Ty << "\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
   return Dest;
 }
@@ -420,7 +420,7 @@
     IMPLEMENT_VECTOR_FCMP(>=);
   default:
     dbgs() << "Unhandled type for FCmp GE instruction: " << *Ty << "\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
   return Dest;
 }
@@ -434,7 +434,7 @@
     IMPLEMENT_VECTOR_FCMP(<);
   default:
     dbgs() << "Unhandled type for FCmp LT instruction: " << *Ty << "\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
   return Dest;
 }
@@ -448,7 +448,7 @@
     IMPLEMENT_VECTOR_FCMP(>);
   default:
     dbgs() << "Unhandled type for FCmp GT instruction: " << *Ty << "\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
   return Dest;
 }
@@ -616,7 +616,7 @@
   switch (I.getPredicate()) {
   default:
     dbgs() << "Don't know how to handle this FCmp predicate!\n-->" << I;
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   break;
   case FCmpInst::FCMP_FALSE: R = executeFCMP_BOOL(Src1, Src2, Ty, false); 
   break;
@@ -673,7 +673,7 @@
   case FCmpInst::FCMP_TRUE:  return executeFCMP_BOOL(Src1, Src2, Ty, true);
   default:
     dbgs() << "Unhandled Cmp predicate\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
 }
 
@@ -727,7 +727,7 @@
     switch(I.getOpcode()){
     default:
       dbgs() << "Don't know how to handle this binary operator!\n-->" << I;
-      llvm_unreachable(0);
+      llvm_unreachable(nullptr);
       break;
     case Instruction::Add:   INTEGER_VECTOR_OPERATION(+) break;
     case Instruction::Sub:   INTEGER_VECTOR_OPERATION(-) break;
@@ -755,7 +755,7 @@
             fmod(Src1.AggregateVal[i].DoubleVal, Src2.AggregateVal[i].DoubleVal);
         else {
           dbgs() << "Unhandled type for Rem instruction: " << *Ty << "\n";
-          llvm_unreachable(0);
+          llvm_unreachable(nullptr);
         }
       }
       break;
@@ -764,7 +764,7 @@
     switch (I.getOpcode()) {
     default:
       dbgs() << "Don't know how to handle this binary operator!\n-->" << I;
-      llvm_unreachable(0);
+      llvm_unreachable(nullptr);
       break;
     case Instruction::Add:   R.IntVal = Src1.IntVal + Src2.IntVal; break;
     case Instruction::Sub:   R.IntVal = Src1.IntVal - Src2.IntVal; break;
@@ -980,7 +980,7 @@
                << uintptr_t(Memory) << '\n');
 
   GenericValue Result = PTOGV(Memory);
-  assert(Result.PointerVal != 0 && "Null pointer returned by malloc!");
+  assert(Result.PointerVal && "Null pointer returned by malloc!");
   SetValue(&I, Result, SF);
 
   if (I.getOpcode() == Instruction::Alloca)
@@ -1733,7 +1733,7 @@
   IMPLEMENT_VAARG(Double);
   default:
     dbgs() << "Unhandled dest type for vaarg instruction: " << *Ty << "\n";
-    llvm_unreachable(0);
+    llvm_unreachable(nullptr);
   }
 
   // Set the Value of this Instruction.
@@ -1757,7 +1757,7 @@
     default:
       dbgs() << "Unhandled destination type for extractelement instruction: "
       << *Ty << "\n";
-      llvm_unreachable(0);
+      llvm_unreachable(nullptr);
       break;
     case Type::IntegerTyID:
       Dest.IntVal = Src1.AggregateVal[indx].IntVal;
@@ -2074,7 +2074,7 @@
 //
 void Interpreter::callFunction(Function *F,
                                const std::vector<GenericValue> &ArgVals) {
-  assert((ECStack.empty() || ECStack.back().Caller.getInstruction() == 0 ||
+  assert((ECStack.empty() || !ECStack.back().Caller.getInstruction() ||
           ECStack.back().Caller.arg_size() == ArgVals.size()) &&
          "Incorrect number of arguments passed into function call!");
   // Make a new stack frame... and fill it in.
diff --git a/llvm/lib/ExecutionEngine/Interpreter/Interpreter.h b/llvm/lib/ExecutionEngine/Interpreter/Interpreter.h
index 2e93cae..2145cde 100644
--- a/llvm/lib/ExecutionEngine/Interpreter/Interpreter.h
+++ b/llvm/lib/ExecutionEngine/Interpreter/Interpreter.h
@@ -108,7 +108,7 @@
   
   /// create - Create an interpreter ExecutionEngine. This can never fail.
   ///
-  static ExecutionEngine *create(Module *M, std::string *ErrorStr = 0);
+  static ExecutionEngine *create(Module *M, std::string *ErrorStr = nullptr);
 
   /// run - Start execution with the specified function and arguments.
   ///
@@ -118,7 +118,7 @@
   void *getPointerToNamedFunction(const std::string &Name,
                                   bool AbortOnFailure = true) override {
     // FIXME: not implemented.
-    return 0;
+    return nullptr;
   }
 
   /// recompileAndRelinkFunction - For the interpreter, functions are always
diff --git a/llvm/lib/ExecutionEngine/JIT/JIT.h b/llvm/lib/ExecutionEngine/JIT/JIT.h
index b1b0768..d2bd508 100644
--- a/llvm/lib/ExecutionEngine/JIT/JIT.h
+++ b/llvm/lib/ExecutionEngine/JIT/JIT.h
@@ -189,7 +189,7 @@
                                     TargetMachine *TM);
 
   // Run the JIT on F and return information about the generated code
-  void runJITOnFunction(Function *F, MachineCodeInfo *MCI = 0) override;
+  void runJITOnFunction(Function *F, MachineCodeInfo *MCI = nullptr) override;
 
   void RegisterJITEventListener(JITEventListener *L) override;
   void UnregisterJITEventListener(JITEventListener *L) override;
diff --git a/llvm/lib/ExecutionEngine/JIT/JITMemoryManager.cpp b/llvm/lib/ExecutionEngine/JIT/JITMemoryManager.cpp
index d0e3813..584b93f 100644
--- a/llvm/lib/ExecutionEngine/JIT/JITMemoryManager.cpp
+++ b/llvm/lib/ExecutionEngine/JIT/JITMemoryManager.cpp
@@ -643,7 +643,7 @@
 }
 
 void DefaultJITMemoryManager::AllocateGOT() {
-  assert(GOTBase == 0 && "Cannot allocate the got multiple times");
+  assert(!GOTBase && "Cannot allocate the got multiple times");
   GOTBase = new uint8_t[sizeof(void*) * 8192];
   HasGOT = true;
 }
diff --git a/llvm/lib/ExecutionEngine/MCJIT/MCJIT.h b/llvm/lib/ExecutionEngine/MCJIT/MCJIT.h
index 066eceb..da1e975 100644
--- a/llvm/lib/ExecutionEngine/MCJIT/MCJIT.h
+++ b/llvm/lib/ExecutionEngine/MCJIT/MCJIT.h
@@ -71,7 +71,7 @@
     ClientMM->deregisterEHFrames(Addr, LoadAddr, Size);
   }
 
-  bool finalizeMemory(std::string *ErrMsg = 0) override {
+  bool finalizeMemory(std::string *ErrMsg = nullptr) override {
     return ClientMM->finalizeMemory(ErrMsg);
   }
 
diff --git a/llvm/lib/ExecutionEngine/RuntimeDyld/ObjectImageCommon.h b/llvm/lib/ExecutionEngine/RuntimeDyld/ObjectImageCommon.h
index 3693c69..f5a4ea9 100644
--- a/llvm/lib/ExecutionEngine/RuntimeDyld/ObjectImageCommon.h
+++ b/llvm/lib/ExecutionEngine/RuntimeDyld/ObjectImageCommon.h
@@ -48,7 +48,7 @@
         object::ObjectFile::createObjectFile(Buffer->getMemBuffer()).get();
   }
   ObjectImageCommon(object::ObjectFile* Input)
-  : ObjectImage(NULL), ObjFile(Input)  {}
+  : ObjectImage(nullptr), ObjFile(Input)  {}
   virtual ~ObjectImageCommon() { delete ObjFile; }
 
   object::symbol_iterator begin_symbols() const override
diff --git a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
index c153ee1..f52d22c 100644
--- a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
+++ b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
@@ -121,7 +121,8 @@
   uint64_t Offset;
   int64_t Addend;
   const char *SymbolName;
-  RelocationValueRef() : SectionID(0), Offset(0), Addend(0), SymbolName(0) {}
+  RelocationValueRef() : SectionID(0), Offset(0), Addend(0),
+                         SymbolName(nullptr) {}
 
   inline bool operator==(const RelocationValueRef &Other) const {
     return SectionID == Other.SectionID && Offset == Other.Offset &&
@@ -335,7 +336,7 @@
     // Work in progress.
     SymbolTableMap::const_iterator pos = GlobalSymbolTable.find(Name);
     if (pos == GlobalSymbolTable.end())
-      return 0;
+      return nullptr;
     SymbolLoc Loc = pos->second;
     return getSectionAddress(Loc.first) + Loc.second;
   }