1 //===- MCSubtargetInfo.cpp - Subtarget Information ------------------------===//
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
30   if (F == A.end() || StringRef(F->Key) != S) return nullptr;  in Find()
43     if (Implies.test(FE.Value))  in SetImpliedBits()
52     if (FE.Implies.getAsBitset().test(Value)) {  in ClearImpliedBits()
62          "Feature flags should start with '+' or '-'");  in ApplyFeatureFlag()
71       Bits.set(FeatureEntry->Value);  in ApplyFeatureFlag()
74       SetImpliedBits(Bits, FeatureEntry->Implies.getAsBitset(), FeatureTable);  in ApplyFeatureFlag()
76       Bits.reset(FeatureEntry->Value);  in ApplyFeatureFlag()
79       ClearImpliedBits(Bits, FeatureEntry->Value, FeatureTable);  in ApplyFeatureFlag()
106   // Determine the length of the longest CPU and Feature entries.  in Help()
110   // Print the CPU table.  in Help()
112   for (auto &CPU : CPUTable)  in Help()  local
113     errs() << format("  %-*s - Select the %s processor.\n", MaxCPULen, CPU.Key,  in Help()
114                      CPU.Key);  in Help()
120     errs() << format("  %-*s - %s.\n", MaxFeatLen, Feature.Key, Feature.Desc);  in Help()
123   errs() << "Use +feature to enable a feature, or -feature to disable it.\n"  in Help()
124             "For example, llc -mcpu=mycpu -mattr=+feature1,-feature2\n";  in Help()
138   // Print the CPU table.  in cpuHelp()
140   for (auto &CPU : CPUTable)  in cpuHelp()  local
141     errs() << "\t" << CPU.Key << "\n";  in cpuHelp()
144   errs() << "Use -mcpu or -mtune to specify the target's processor.\n"  in cpuHelp()
145             "For example, clang --target=aarch64-unknown-linux-gnu "  in cpuHelp()
146             "-mcpu=cortex-a35\n";  in cpuHelp()
151 static FeatureBitset getFeatures(StringRef CPU, StringRef TuneCPU, StringRef FS,  in getFeatures()  argument
159   assert(llvm::is_sorted(ProcDesc) && "CPU table is not sorted");  in getFeatures()
160   assert(llvm::is_sorted(ProcFeatures) && "CPU features table is not sorted");  in getFeatures()
165   if (CPU == "help")  in getFeatures()
168   // Find CPU entry if CPU name is specified.  in getFeatures()
169   else if (!CPU.empty()) {  in getFeatures()
170     const SubtargetSubTypeKV *CPUEntry = Find(CPU, ProcDesc);  in getFeatures()
174       // Set the features implied by this CPU feature, if any.  in getFeatures()
175       SetImpliedBits(Bits, CPUEntry->Implies.getAsBitset(), ProcFeatures);  in getFeatures()
177       errs() << "'" << CPU << "' is not a recognized processor for this target"  in getFeatures()
187       // Set the features implied by this CPU feature, if any.  in getFeatures()
188       SetImpliedBits(Bits, CPUEntry->TuneImplies.getAsBitset(), ProcFeatures);  in getFeatures()
189     } else if (TuneCPU != CPU) {  in getFeatures()
209 void MCSubtargetInfo::InitMCProcessorInfo(StringRef CPU, StringRef TuneCPU,  in InitMCProcessorInfo()  argument
211   FeatureBits = getFeatures(CPU, TuneCPU, FS, ProcDesc, ProcFeatures);  in InitMCProcessorInfo()
220 void MCSubtargetInfo::setDefaultFeatures(StringRef CPU, StringRef TuneCPU,  in setDefaultFeatures()  argument
222   FeatureBits = getFeatures(CPU, TuneCPU, FS, ProcDesc, ProcFeatures);  in setDefaultFeatures()
234     : TargetTriple(TT), CPU(std::string(C)), TuneCPU(std::string(TC)),  in MCSubtargetInfo()
238   InitMCProcessorInfo(CPU, TuneCPU, FS);  in MCSubtargetInfo()
274     if (FeatureBits.test(FeatureEntry->Value)) {  in ToggleFeature()
275       FeatureBits.reset(FeatureEntry->Value);  in ToggleFeature()
277       ClearImpliedBits(FeatureBits, FeatureEntry->Value, ProcFeatures);  in ToggleFeature()
279       FeatureBits.set(FeatureEntry->Value);  in ToggleFeature()
282       SetImpliedBits(FeatureBits, FeatureEntry->Implies.getAsBitset(),  in ToggleFeature()
303     if (F[0] == '-')  in checkFeatures()
310 const MCSchedModel &MCSubtargetInfo::getSchedModelForCPU(StringRef CPU) const {  in getSchedModelForCPU()
315   const SubtargetSubTypeKV *CPUEntry = Find(CPU, ProcDesc);  in getSchedModelForCPU()
318     if (CPU != "help") // Don't error if the user asked for help.  in getSchedModelForCPU()
319       errs() << "'" << CPU  in getSchedModelForCPU()
324   assert(CPUEntry->SchedModel && "Missing processor SchedModel value");  in getSchedModelForCPU()
325   return *CPUEntry->SchedModel;  in getSchedModelForCPU()
329 MCSubtargetInfo::getInstrItineraryForCPU(StringRef CPU) const {  in getInstrItineraryForCPU()
330   const MCSchedModel &SchedModel = getSchedModelForCPU(CPU);  in getInstrItineraryForCPU()
343     return FeatureBits.test(FeatureKV.Value);  in getEnabledProcessorFeatures()