Start processing function blocks in Subzero.

src/IceTypes.h

Index: src/IceTypes.h
diff --git a/src/IceTypes.h b/src/IceTypes.h
index 6bc2ded5ec63f8d9d388eef2cd14426a7a6b8928..813f7d705b485ae72e34103fa5c960c0d0e1b695 100644
--- a/src/IceTypes.h
+++ b/src/IceTypes.h
@@ -20,8 +20,14 @@
 
 namespace Ice {
 
+enum TypeFlag {
+  // Define each flag as a power of 2, so that we can build flag bitsets.
+  TypeFlagIsInteger = 0x1,
+  TypeFlagIsFloating = 0x2
+};
+
 enum Type {
-#define X(tag, size, align, elts, elty, str) tag,
+#define X(tag, size, align, elts, elty, str, flags) tag,
   ICETYPE_TABLE
 #undef X
       IceType_NUM
@@ -46,6 +52,8 @@ size_t typeAlignInBytes(Type Ty);
 size_t typeNumElements(Type Ty);
 Type typeElementType(Type Ty);
 
+bool isIntegerType(Type Ty);
+bool isFloatingType(Type Ty);
 inline bool isVectorType(Type Ty) { return typeNumElements(Ty) > 1; }
 
 template <> Ostream &operator<<(class Ostream &Str, const Type &Ty);