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

src/IceTargetLoweringX8632.cpp

Index: src/IceTargetLoweringX8632.cpp
diff --git a/src/IceTargetLoweringX8632.cpp b/src/IceTargetLoweringX8632.cpp
index 00196933d65155864da4d052e6e88591b32e570c..2b3f2adfa8853c35d555a458b36042bc9806e4a0 100644
--- a/src/IceTargetLoweringX8632.cpp
+++ b/src/IceTargetLoweringX8632.cpp
@@ -675,7 +675,7 @@ void TargetX8632::addEpilog(CfgNode *Node) {
   _pop(T_ecx);
   lowerIndirectJump(T_ecx);
   if (RI->getSrcSize()) {
-    Variable *RetValue = llvm::cast<Variable>(RI->getSrc(0));
+    auto *RetValue = llvm::cast<Variable>(RI->getSrc(0));
     Context.insert(InstFakeUse::create(Func, RetValue));
   }
   RI->setDeleted();
@@ -797,7 +797,7 @@ void TargetDataX8632::emitConstantPool(GlobalContext *Ctx) {
   for (Constant *C : Pool) {
     if (!C->getShouldBePooled())
       continue;
-    typename T::IceType *Const = llvm::cast<typename T::IceType>(C);
+    auto *Const = llvm::cast<typename T::IceType>(C);
     typename T::IceType::PrimType Value = Const->getValue();
     // Use memcpy() to copy bits from Value into RawValue in a way that avoids
     // breaking strict-aliasing rules.