Subzero: Clean up some uses of *_cast<>.

src/IceInstARM32.h

Index: src/IceInstARM32.h
diff --git a/src/IceInstARM32.h b/src/IceInstARM32.h
index bce1aca787ddd3b6484855fc2e2be4a6a82ad9ad..cb872a71d8adc9140565b48644c6e125fa3685b5 100644
--- a/src/IceInstARM32.h
+++ b/src/IceInstARM32.h
@@ -348,7 +348,7 @@ public:
   static StackVariable *create(Cfg *Func, Type Ty, SizeT Index) {
     return new (Func->allocate<StackVariable>()) StackVariable(Ty, Index);
   }
-  const static OperandKind StackVariableKind =
+  const static auto StackVariableKind =
       static_cast<OperandKind>(kVariable_Target);

[John, 2016/02/07 16:18:32]

While at this, constexpr.

[Jim Stichnoth, 2016/02/07 16:42:42]

Done.

   static bool classof(const Operand *Operand) {
     return Operand->getKind() == StackVariableKind;