Introduction of improved switch lowering.

src/IceClFlags.cpp

 //===- subzero/src/IceClFlags.cpp - Command line flags and parsing --------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 160 matching lines @@
     "timing-focus",
     cl::desc("Break down timing for a specific function (use '*' for all)"),
     cl::init(""));
 
 cl::opt<std::string>
     TranslateOnly("translate-only",
                   cl::desc("Translate only the given function"), cl::init(""));
 
 cl::opt<bool> UseSandboxing("sandbox", cl::desc("Use sandboxing"));
 
+cl::opt<bool> UseAdvancedSwitchLowering("adv-switch",
+    cl::desc("Use advanced switch lowering"));
+
 cl::opt<std::string> VerboseFocusOn(
     "verbose-focus",
     cl::desc("Temporarily enable full verbosity for a specific function"),
     cl::init(""));
 
 cl::opt<Ice::FileType> OutFileType(
     "filetype", cl::desc("Output file type"), cl::init(Ice::FT_Iasm),
     cl::values(clEnumValN(Ice::FT_Elf, "obj", "Native ELF object ('.o') file"),
                clEnumValN(Ice::FT_Asm, "asm", "Assembly ('.s') file"),
                clEnumValN(Ice::FT_Iasm, "iasm",
@@ skipping 144 matching lines @@
   OutFlags.PhiEdgeSplit = false;
   OutFlags.RandomNopInsertion = false;
   OutFlags.RandomRegAlloc = false;
   OutFlags.ReorderFunctions = false;
   OutFlags.ReorderGlobalVariables = false;
   OutFlags.ReorderPooledConstants = false;
   OutFlags.SkipUnimplemented = false;
   OutFlags.SubzeroTimingEnabled = false;
   OutFlags.TimeEachFunction = false;
   OutFlags.UseSandboxing = false;
+  OutFlags.UseAdvancedSwitchLowering = false;
   // Enum and integer fields.
   OutFlags.Opt = Opt_m1;
   OutFlags.OutFileType = FT_Iasm;
   OutFlags.RandomMaxNopsPerInstruction = 0;
   OutFlags.RandomNopProbabilityAsPercentage = 0;
   OutFlags.RandomizeAndPoolImmediatesOption = RPI_None;
   OutFlags.RandomizeAndPoolImmediatesThreshold = 0xffff;
   OutFlags.ReorderFunctionsWindowSize = 8;
   OutFlags.TArch = TargetArch_NUM;
   OutFlags.VMask = IceV_None;
@@ skipping 41 matching lines @@
   OutFlags.setShouldRandomizeRegAlloc(::RandomizeRegisterAllocation);
   OutFlags.setSkipUnimplemented(::SkipUnimplemented);
   OutFlags.setSubzeroTimingEnabled(::SubzeroTimingEnabled);
   OutFlags.setTargetArch(::TargetArch);
   OutFlags.setTargetInstructionSet(::TargetInstructionSet);
   OutFlags.setTestPrefix(::TestPrefix);
   OutFlags.setTimeEachFunction(::TimeEachFunction);
   OutFlags.setTimingFocusOn(::TimingFocusOn);
   OutFlags.setTranslateOnly(::TranslateOnly);
   OutFlags.setUseSandboxing(::UseSandboxing);
+  OutFlags.setUseAdvancedSwitchLowering(::UseAdvancedSwitchLowering);
   OutFlags.setVerboseFocusOn(::VerboseFocusOn);
   OutFlags.setOutFileType(::OutFileType);
   OutFlags.setMaxNopsPerInstruction(::MaxNopsPerInstruction);
   OutFlags.setNopProbabilityAsPercentage(::NopProbabilityAsPercentage);
   OutFlags.setVerbose(VMask);
 
   // Set for immediates randomization or pooling option.
   OutFlags.setRandomizeAndPoolImmediatesOption(
       ::RandomizeAndPoolImmediatesOption);
   OutFlags.setRandomizeAndPoolImmediatesThreshold(
@@ skipping 16 matching lines @@
   OutFlagsExtra.setGenerateBuildAtts(GenerateBuildAtts);
   OutFlagsExtra.setLLVMVerboseErrors(LLVMVerboseErrors);
   OutFlagsExtra.setAppName(AppName);
   OutFlagsExtra.setInputFileFormat(InputFileFormat);
   OutFlagsExtra.setIRFilename(IRFilename);
   OutFlagsExtra.setLogFilename(LogFilename);
   OutFlagsExtra.setOutputFilename(OutputFilename);
 }
 
 } // end of namespace Ice