Subzero: Use "auto" per (unwritten) auto coding style.

src/IceGlobalContext.cpp

 //===- subzero/src/IceGlobalContext.cpp - Global context defs -------------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 112 matching lines @@
 template <Type Ty, typename KeyType, typename ValueType> class TypePool {
   TypePool(const TypePool &) = delete;
   TypePool &operator=(const TypePool &) = delete;
 
 public:
   TypePool() = default;
   ValueType *getOrAdd(GlobalContext *Ctx, KeyType Key) {
     auto Iter = Pool.find(Key);
     if (Iter != Pool.end())
       return Iter->second;
-    ValueType *Result = ValueType::create(Ctx, Ty, Key);
+    auto *Result = ValueType::create(Ctx, Ty, Key);
     Pool[Key] = Result;
     return Result;
   }
   ConstantList getConstantPool() const {
     ConstantList Constants;
     Constants.reserve(Pool.size());
     for (auto &I : Pool)
       Constants.push_back(I.second);
     // The sort (and its KeyCompareLess machinery) is not strictly necessary,
     // but is desirable for producing output that is deterministic across
@@ skipping 865 matching lines @@
   Ctx = Func->getContext();
   Active =
       Func->getFocusedTiming() || Ctx->getFlags().getSubzeroTimingEnabled();
   if (Active)
     Ctx->pushTimer(ID, StackID);
 }
 
 ICE_TLS_DEFINE_FIELD(GlobalContext::ThreadContext *, GlobalContext, TLS);
 
 } // end of namespace Ice