Convert Subzero's bitcode reader to generate ICE types.

src/IceTypes.cpp

Index: src/IceTypes.cpp
diff --git a/src/IceTypes.cpp b/src/IceTypes.cpp
index 11ac5b780e4fe34121b99858d10d675f90b4126c..6b81d8ac9e8765aef9dee0736bbcee4972373e8a 100644
--- a/src/IceTypes.cpp
+++ b/src/IceTypes.cpp
@@ -230,7 +230,7 @@ Type getCompareResultType(Type Ty) {
 
 SizeT getScalarIntBitWidth(Type Ty) {
   assert(isScalarIntegerType(Ty));
-  if (Ty == Ice::IceType_i1)
+  if (Ty == IceType_i1)
     return 1;
   return typeWidthInBytes(Ty) * CHAR_BIT;
 }
@@ -245,4 +245,18 @@ const char *typeString(Type Ty) {
   return "???";
 }
 
+void FuncSigType::dump(Ostream &Stream) const {
+  Stream << ReturnType << " (";
+  bool IsFirst = true;
+  for (const Type ArgTy : ArgList) {
+    if (IsFirst) {
+      IsFirst = false;
+    } else {
+      Stream << ", ";
+    }
+    Stream << ArgTy;
+  }
+  Stream << ")";
+}
+
 } // end of namespace Ice