Refactor all instances of `typedef y x` to the C++11 `using x = y` syntax.

src/IceTargetLoweringX8632.cpp

Index: src/IceTargetLoweringX8632.cpp
diff --git a/src/IceTargetLoweringX8632.cpp b/src/IceTargetLoweringX8632.cpp
index a4ceac061f63e4aa9199799df184c9ea84daf8e9..f06150fc1b5dc9370997fe3ea5ad613e79224a85 100644
--- a/src/IceTargetLoweringX8632.cpp
+++ b/src/IceTargetLoweringX8632.cpp
@@ -120,7 +120,7 @@ void TargetX8632::lowerCall(const InstCall *Instr) {
   // Apple.
   NeedsStackAlignment = true;
 
-  typedef std::vector<Operand *> OperandList;
+  using OperandList = std::vector<Operand *>;
   OperandList XmmArgs;
   OperandList StackArgs, StackArgLocations;
   uint32_t ParameterAreaSizeBytes = 0;
@@ -653,8 +653,8 @@ namespace {
 template <typename T> struct PoolTypeConverter {};
 
 template <> struct PoolTypeConverter<float> {
-  typedef uint32_t PrimitiveIntType;
-  typedef ConstantFloat IceType;
+  using PrimitiveIntType = uint32_t;
+  using IceType = ConstantFloat;
   static const Type Ty = IceType_f32;
   static const char *TypeName;
   static const char *AsmTag;
@@ -665,8 +665,8 @@ const char *PoolTypeConverter<float>::AsmTag = ".long";
 const char *PoolTypeConverter<float>::PrintfString = "0x%x";
 
 template <> struct PoolTypeConverter<double> {
-  typedef uint64_t PrimitiveIntType;
-  typedef ConstantDouble IceType;
+  using PrimitiveIntType = uint64_t;
+  using IceType = ConstantDouble;
   static const Type Ty = IceType_f64;
   static const char *TypeName;
   static const char *AsmTag;
@@ -678,8 +678,8 @@ const char *PoolTypeConverter<double>::PrintfString = "0x%llx";
 
 // Add converter for int type constant pooling
 template <> struct PoolTypeConverter<uint32_t> {
-  typedef uint32_t PrimitiveIntType;
-  typedef ConstantInteger32 IceType;
+  using PrimitiveIntType = uint32_t;
+  using IceType = ConstantInteger32;
   static const Type Ty = IceType_i32;
   static const char *TypeName;
   static const char *AsmTag;
@@ -691,8 +691,8 @@ const char *PoolTypeConverter<uint32_t>::PrintfString = "0x%x";
 
 // Add converter for int type constant pooling
 template <> struct PoolTypeConverter<uint16_t> {
-  typedef uint32_t PrimitiveIntType;
-  typedef ConstantInteger32 IceType;
+  using PrimitiveIntType = uint32_t;
+  using IceType = ConstantInteger32;
   static const Type Ty = IceType_i16;
   static const char *TypeName;
   static const char *AsmTag;
@@ -704,8 +704,8 @@ const char *PoolTypeConverter<uint16_t>::PrintfString = "0x%x";
 
 // Add converter for int type constant pooling
 template <> struct PoolTypeConverter<uint8_t> {
-  typedef uint32_t PrimitiveIntType;
-  typedef ConstantInteger32 IceType;
+  using PrimitiveIntType = uint32_t;
+  using IceType = ConstantInteger32;
   static const Type Ty = IceType_i8;
   static const char *TypeName;
   static const char *AsmTag;