Implements include/exclude register lists for translation.

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 275 matching lines @@
 /// Max number of nops to insert per instruction.
 cl::opt<int> MaxNopsPerInstruction(
     "max-nops-per-instruction",
     cl::desc("Max number of nops to insert per instruction"), cl::init(1));
 
 /// Nop insertion probability as percentage.
 cl::opt<int> NopProbabilityAsPercentage(
     "nop-insertion-percentage",
     cl::desc("Nop insertion probability as percentage"), cl::init(10));
 
+/// Restricts registers in corresponding register classes to specified list.
+cl::list<std::string> UseRestrictedRegisters(
+    "reg-use", cl::CommaSeparated,
+    cl::desc(
+        "Only use specified registers for corresponding register classes"));
+
+/// List of excluded registers.
+cl::list<std::string>
+    ExcludedRegisters("reg-exclude", cl::CommaSeparated,
+                      cl::desc("Don't use specified registers"));
+
 /// Verbose options (can be comma-separated).
 cl::list<Ice::VerboseItem> VerboseList(
     "verbose", cl::CommaSeparated,
     cl::desc("Verbose options (can be comma-separated):"),
     cl::values(
         clEnumValN(Ice::IceV_Instructions, "inst", "Print basic instructions"),
         clEnumValN(Ice::IceV_Deleted, "del", "Include deleted instructions"),
         clEnumValN(Ice::IceV_InstNumbers, "instnum",
                    "Print instruction numbers"),
         clEnumValN(Ice::IceV_Preds, "pred", "Show predecessors"),
         clEnumValN(Ice::IceV_Succs, "succ", "Show successors"),
         clEnumValN(Ice::IceV_Liveness, "live", "Liveness information"),
         clEnumValN(Ice::IceV_RegOrigins, "orig", "Physical register origins"),
         clEnumValN(Ice::IceV_LinearScan, "regalloc", "Linear scan details"),
         clEnumValN(Ice::IceV_Frame, "frame", "Stack frame layout details"),
         clEnumValN(Ice::IceV_AddrOpt, "addropt", "Address mode optimization"),
         clEnumValN(Ice::IceV_Random, "random", "Randomization details"),
         clEnumValN(Ice::IceV_Folding, "fold", "Instruction folding details"),
         clEnumValN(Ice::IceV_RMW, "rmw", "ReadModifyWrite optimization"),
         clEnumValN(Ice::IceV_Loop, "loop", "Loop nest depth analysis"),
         clEnumValN(Ice::IceV_Status, "status",
                    "Print the name of the function being translated"),
+        clEnumValN(Ice::IceV_AvailableRegs, "registers",
+                   "Show available registers for register allocation"),
         clEnumValN(Ice::IceV_All, "all", "Use all verbose options"),
         clEnumValN(Ice::IceV_Most, "most",
                    "Use all verbose options except 'regalloc'"),
         clEnumValN(Ice::IceV_None, "none", "No verbosity"), clEnumValEnd));
 
 // Options not captured in Ice::ClFlags and propagated.
 
 /// Exit with success status, even if errors found.
 cl::opt<bool> AlwaysExitSuccess(
     "exit-success", cl::desc("Exit with success status, even if errors found"),
@@ skipping 152 matching lines @@
   // IceString fields.
   OutFlags.DefaultFunctionPrefix = "";
   OutFlags.DefaultGlobalPrefix = "";
   OutFlags.TestPrefix = "";
   OutFlags.TimingFocusOn = "";
   OutFlags.TranslateOnly = "";
   OutFlags.VerboseFocusOn = "";
   // size_t and 64-bit fields.
   OutFlags.NumTranslationThreads = 0;
   OutFlags.RandomSeed = 0;
+  // Unordered set fields.
+  OutFlags.clearExcludedRegisters();
+  OutFlags.clearUseRestrictedRegisters();
 }
 
 void ClFlags::getParsedClFlags(ClFlags &OutFlags) {
   Ice::VerboseMask VMask = Ice::IceV_None;
   // Don't generate verbose messages if routines to dump messages are not
   // available.
   if (BuildDefs::dump()) {
     for (unsigned i = 0; i != VerboseList.size(); ++i)
       VMask |= VerboseList[i];
   }
 
   OutFlags.setAllowErrorRecovery(::AllowErrorRecovery);
   OutFlags.setAllowExternDefinedSymbols(::AllowExternDefinedSymbols ||
                                         ::DisableInternal);
   OutFlags.setAllowIacaMarks(::AllowIacaMarks);
   OutFlags.setAllowUninitializedGlobals(::AllowUninitializedGlobals);
   OutFlags.setDataSections(::DataSections);
   OutFlags.setDecorateAsm(::DecorateAsm);
   OutFlags.setDefaultFunctionPrefix(::DefaultFunctionPrefix);
   OutFlags.setDefaultGlobalPrefix(::DefaultGlobalPrefix);
   OutFlags.setDisableHybridAssembly(::DisableHybridAssembly ||
                                     (::OutFileType != Ice::FT_Iasm));
   OutFlags.setDisableInternal(::DisableInternal);
   OutFlags.setDisableTranslation(::DisableTranslation);
   OutFlags.setDumpStats(::DumpStats);
   OutFlags.setEnableBlockProfile(::EnableBlockProfile);
+  OutFlags.setExcludedRegisters(::ExcludedRegisters);
   OutFlags.setForceMemIntrinOpt(::ForceMemIntrinOpt);
   OutFlags.setFunctionSections(::FunctionSections);
   OutFlags.setNumTranslationThreads(::NumThreads);
   OutFlags.setOptLevel(::OLevel);
   OutFlags.setMockBoundsCheck(::MockBoundsCheck);
   OutFlags.setPhiEdgeSplit(::EnablePhiEdgeSplit);
   OutFlags.setRandomSeed(::RandomSeed);
   OutFlags.setRandomizeAndPoolImmediatesOption(
       ::RandomizeAndPoolImmediatesOption);
   OutFlags.setRandomizeAndPoolImmediatesThreshold(
       ::RandomizeAndPoolImmediatesThreshold);
   OutFlags.setReorderFunctionsWindowSize(::ReorderFunctionsWindowSize);
   OutFlags.setShouldReorderBasicBlocks(::ReorderBasicBlocks);
   OutFlags.setShouldDoNopInsertion(::ShouldDoNopInsertion);
   OutFlags.setShouldRandomizeRegAlloc(::RandomizeRegisterAllocation);
   OutFlags.setShouldRepeatRegAlloc(::RepeatRegAlloc);
   OutFlags.setShouldReorderFunctions(::ReorderFunctions);
   OutFlags.setShouldReorderGlobalVariables(::ReorderGlobalVariables);
   OutFlags.setShouldReorderPooledConstants(::ReorderPooledConstants);
   OutFlags.setSkipUnimplemented(::SkipUnimplemented);
   OutFlags.setSubzeroTimingEnabled(::SubzeroTimingEnabled);
   OutFlags.setTargetArch(::TargetArch);
   OutFlags.setTargetInstructionSet(::TargetInstructionSet);
   OutFlags.setTestPrefix(::TestPrefix);
   OutFlags.setTestStackExtra(::TestStackExtra);
   OutFlags.setTimeEachFunction(::TimeEachFunction);
   OutFlags.setTimingFocusOn(::TimingFocusOn);
   OutFlags.setTranslateOnly(::TranslateOnly);
   OutFlags.setUseNonsfi(::UseNonsfi);
+  OutFlags.setUseRestrictedRegisters(::UseRestrictedRegisters);
   OutFlags.setUseSandboxing(::UseSandboxing);
   OutFlags.setVerboseFocusOn(::VerboseFocusOn);
   OutFlags.setOutFileType(::OutFileType);
   OutFlags.setMaxNopsPerInstruction(::MaxNopsPerInstruction);
   OutFlags.setNopProbabilityAsPercentage(::NopProbabilityAsPercentage);
   OutFlags.setVerbose(VMask);
 }
 
 void ClFlags::getParsedClFlagsExtra(ClFlagsExtra &OutFlagsExtra) {
   OutFlagsExtra.setAlwaysExitSuccess(AlwaysExitSuccess);
   OutFlagsExtra.setBitcodeAsText(BitcodeAsText);
   OutFlagsExtra.setBuildOnRead(BuildOnRead);
   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