Introduction of improved switch lowering.

src/IceClFlags.h

 //===- subzero/src/IceClFlags.h - Cl Flags for translation ------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 85 matching lines @@
   bool getSubzeroTimingEnabled() const { return SubzeroTimingEnabled; }
   void setSubzeroTimingEnabled(bool NewValue) {
     SubzeroTimingEnabled = NewValue;
   }
 
   bool getTimeEachFunction() const {
     return BuildDefs::dump() && TimeEachFunction;
   }
   void setTimeEachFunction(bool NewValue) { TimeEachFunction = NewValue; }
 
+  bool getUseAdvancedSwitchLowering() const {
+    return UseAdvancedSwitchLowering;
+  }
+  void setUseAdvancedSwitchLowering(bool NewValue) {
+    UseAdvancedSwitchLowering = NewValue;
+  }
+
   bool getUseSandboxing() const { return UseSandboxing; }
   void setUseSandboxing(bool NewValue) { UseSandboxing = NewValue; }
 
   // Enum and integer accessors.
   OptLevel getOptLevel() const { return Opt; }
   void setOptLevel(OptLevel NewValue) { Opt = NewValue; }
 
   FileType getOutFileType() const { return OutFileType; }
   void setOutFileType(FileType NewValue) { OutFileType = NewValue; }
 
@@ skipping 112 matching lines @@
   bool GenerateUnitTestMessages;
   bool PhiEdgeSplit;
   bool RandomNopInsertion;
   bool RandomRegAlloc;
   bool ReorderFunctions;
   bool ReorderGlobalVariables;
   bool ReorderPooledConstants;
   bool SkipUnimplemented;
   bool SubzeroTimingEnabled;
   bool TimeEachFunction;
+  bool UseAdvancedSwitchLowering;
   bool UseSandboxing;
 
   OptLevel Opt;
   FileType OutFileType;
   RandomizeAndPoolImmediatesEnum RandomizeAndPoolImmediatesOption;
   uint32_t RandomizeAndPoolImmediatesThreshold;
   int RandomMaxNopsPerInstruction;
   int RandomNopProbabilityAsPercentage;
   uint32_t ReorderFunctionsWindowSize;
   TargetArch TArch;
   TargetInstructionSet TInstrSet;
   VerboseMask VMask;
 
   IceString DefaultFunctionPrefix;
   IceString DefaultGlobalPrefix;
   IceString TestPrefix;
   IceString TimingFocusOn;
   IceString TranslateOnly;
   IceString VerboseFocusOn;
 
   size_t NumTranslationThreads; // 0 means completely sequential
   uint64_t RandomSeed;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICECLFLAGS_H