Introduction of improved switch lowering.

src/IceTypes.h

 //===- subzero/src/IceTypes.h - Primitive ICE types -------------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
 /// This file declares a few properties of the primitive types allowed
 /// in Subzero.  Every Subzero source file is expected to include
 /// IceTypes.h.
 ///
 //===----------------------------------------------------------------------===//
 
 #ifndef SUBZERO_SRC_ICETYPES_H
 #define SUBZERO_SRC_ICETYPES_H
 
 #include "IceDefs.h"
 #include "IceTypes.def"
 
 namespace Ice {
 
 enum Type {
-#define X(tag, size, align, elts, elty, str) tag,
+#define X(tag, sizeLog2, align, elts, elty, str) tag,
   ICETYPE_TABLE
 #undef X
       IceType_NUM
 };
 
 enum TargetArch {
 #define X(tag, str, is_elf64, e_machine, e_flags) tag,
   TARGETARCH_TABLE
 #undef X
       TargetArch_NUM
@@ skipping 16 matching lines @@
   X86InstructionSet_End,
   ARM32InstructionSet_Begin,
   ARM32InstructionSet_Neon = ARM32InstructionSet_Begin,
   ARM32InstructionSet_HWDivArm,
   ARM32InstructionSet_End,
 };
 
 enum OptLevel { Opt_m1, Opt_0, Opt_1, Opt_2 };
 
 size_t typeWidthInBytes(Type Ty);
+int8_t typeWidthInBytesLog2(Type Ty);
 size_t typeAlignInBytes(Type Ty);
 size_t typeNumElements(Type Ty);
 Type typeElementType(Type Ty);
 const char *typeString(Type Ty);
 
 inline Type getPointerType() { return IceType_i32; }
 
 bool isVectorType(Type Ty);
 
 bool isIntegerType(Type Ty); // scalar or vector
@@ skipping 82 matching lines @@
 };
 
 inline Ostream &operator<<(Ostream &Stream, const FuncSigType &Sig) {
   Sig.dump(Stream);
   return Stream;
 }
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICETYPES_H