Add switch instruction to Subzero bitcode reader.

src/IceTypes.cpp

 //===- subzero/src/IceTypes.cpp - Primitive type properties ---------------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file defines a few attributes of Subzero primitive types.
@@ skipping 210 matching lines @@
 }
 
 Type getCompareResultType(Type Ty) {
   size_t Index = static_cast<size_t>(Ty);
   if (Index < IceType_NUM)
     return TypePropertiesTable[Index].CompareResultType;
   llvm_unreachable("Invalid type for getCompareResultType");
   return IceType_void;
 }
 
+SizeT getScalarIntBitWidth(Type Ty) {
+  assert(isScalarIntegerType(Ty));
+  if (Ty == Ice::IceType_i1)
+    return 1;
+  return typeWidthInBytes(Ty) * CHAR_BIT;
+}
+
 // ======================== Dump routines ======================== //
 
 const char *typeString(Type Ty) {
   size_t Index = static_cast<size_t>(Ty);
   if (Index < IceType_NUM)
     return TypeAttributes[Index].DisplayString;
   llvm_unreachable("Invalid type for typeString");
   return "???";
 }
 
 } // end of namespace Ice