X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=utils%2FTableGen%2FIntrinsicEmitter.cpp;h=86e83e591116a3b46727ac21d47ea8980d383a4e;hb=a62c302ddd79c525d6fac050974911d36662ebfe;hp=a56b77dbe01363803410525531a24a1b71fc52f5;hpb=71c3bc3d966bd874f760abf055c559673f925029;p=oota-llvm.git diff --git a/utils/TableGen/IntrinsicEmitter.cpp b/utils/TableGen/IntrinsicEmitter.cpp index a56b77dbe01..86e83e59111 100644 --- a/utils/TableGen/IntrinsicEmitter.cpp +++ b/utils/TableGen/IntrinsicEmitter.cpp @@ -2,8 +2,8 @@ // // The LLVM Compiler Infrastructure // -// This file was developed by Chris Lattner and is distributed under -// the University of Illinois Open Source License. See LICENSE.TXT for details. +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // @@ -11,94 +11,13 @@ // //===----------------------------------------------------------------------===// +#include "CodeGenTarget.h" #include "IntrinsicEmitter.h" #include "Record.h" #include "llvm/ADT/StringExtras.h" #include using namespace llvm; -//===----------------------------------------------------------------------===// -// CodeGenIntrinsic Implementation -//===----------------------------------------------------------------------===// - -std::vector llvm::LoadIntrinsics(const RecordKeeper &RC) { - std::vector I = RC.getAllDerivedDefinitions("Intrinsic"); - return std::vector(I.begin(), I.end()); -} - -CodeGenIntrinsic::CodeGenIntrinsic(Record *R) { - std::string DefName = R->getName(); - ModRef = WriteMem; - - if (DefName.size() <= 4 || - std::string(DefName.begin(), DefName.begin()+4) != "int_") - throw "Intrinsic '" + DefName + "' does not start with 'int_'!"; - EnumName = std::string(DefName.begin()+4, DefName.end()); - GCCBuiltinName = R->getValueAsString("GCCBuiltinName"); - TargetPrefix = R->getValueAsString("TargetPrefix"); - Name = R->getValueAsString("LLVMName"); - if (Name == "") { - // If an explicit name isn't specified, derive one from the DefName. - Name = "llvm."; - for (unsigned i = 0, e = EnumName.size(); i != e; ++i) - if (EnumName[i] == '_') - Name += '.'; - else - Name += EnumName[i]; - } else { - // Verify it starts with "llvm.". - if (Name.size() <= 5 || - std::string(Name.begin(), Name.begin()+5) != "llvm.") - throw "Intrinsic '" + DefName + "'s name does not start with 'llvm.'!"; - } - - // If TargetPrefix is specified, make sure that Name starts with - // "llvm..". - if (!TargetPrefix.empty()) { - if (Name.size() < 6+TargetPrefix.size() || - std::string(Name.begin()+5, Name.begin()+6+TargetPrefix.size()) - != (TargetPrefix+".")) - throw "Intrinsic '" + DefName + "' does not start with 'llvm." + - TargetPrefix + ".'!"; - } - - // Parse the list of argument types. - ListInit *TypeList = R->getValueAsListInit("Types"); - for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) { - DefInit *DI = dynamic_cast(TypeList->getElement(i)); - assert(DI && "Invalid list type!"); - Record *TyEl = DI->getDef(); - assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!"); - ArgTypes.push_back(TyEl->getValueAsString("TypeVal")); - ArgTypeDefs.push_back(TyEl); - } - if (ArgTypes.size() == 0) - throw "Intrinsic '"+DefName+"' needs at least a type for the ret value!"; - - // Parse the intrinsic properties. - ListInit *PropList = R->getValueAsListInit("Properties"); - for (unsigned i = 0, e = PropList->getSize(); i != e; ++i) { - DefInit *DI = dynamic_cast(PropList->getElement(i)); - assert(DI && "Invalid list type!"); - Record *Property = DI->getDef(); - assert(Property->isSubClassOf("IntrinsicProperty") && - "Expected a property!"); - - if (Property->getName() == "InstrNoMem") - ModRef = NoMem; - else if (Property->getName() == "InstrReadArgMem") - ModRef = ReadArgMem; - else if (Property->getName() == "IntrReadMem") - ModRef = ReadMem; - else if (Property->getName() == "InstrWriteArgMem") - ModRef = WriteArgMem; - else if (Property->getName() == "IntrWriteMem") - ModRef = WriteMem; - else - assert(0 && "Unknown property!"); - } -} - //===----------------------------------------------------------------------===// // IntrinsicEmitter Implementation //===----------------------------------------------------------------------===// @@ -120,11 +39,11 @@ void IntrinsicEmitter::run(std::ostream &OS) { // Emit the intrinsic verifier. EmitVerifier(Ints, OS); - // Emit mod/ref info for each function. - EmitModRefInfo(Ints, OS); + // Emit the intrinsic declaration generator. + EmitGenerator(Ints, OS); - // Emit side effect info for each function. - EmitSideEffectInfo(Ints, OS); + // Emit the intrinsic parameter attributes. + EmitAttributes(Ints, OS); // Emit a list of intrinsics with corresponding GCC builtins. EmitGCCBuiltinList(Ints, OS); @@ -150,125 +69,351 @@ void IntrinsicEmitter:: EmitFnNameRecognizer(const std::vector &Ints, std::ostream &OS) { // Build a function name -> intrinsic name mapping. - std::map IntMapping; + std::map IntMapping; for (unsigned i = 0, e = Ints.size(); i != e; ++i) - IntMapping[Ints[i].Name] = Ints[i].EnumName; + IntMapping[Ints[i].Name] = i; OS << "// Function name -> enum value recognizer code.\n"; OS << "#ifdef GET_FUNCTION_RECOGNIZER\n"; OS << " switch (Name[5]) {\n"; - OS << " default: break;\n"; + OS << " default:\n"; // Emit the intrinsics in sorted order. char LastChar = 0; - for (std::map::iterator I = IntMapping.begin(), + for (std::map::iterator I = IntMapping.begin(), E = IntMapping.end(); I != E; ++I) { if (I->first[5] != LastChar) { LastChar = I->first[5]; + OS << " break;\n"; OS << " case '" << LastChar << "':\n"; } - OS << " if (Name == \"" << I->first << "\") return Intrinsic::" - << I->second << ";\n"; + // For overloaded intrinsics, only the prefix needs to match + if (Ints[I->second].isOverloaded) + OS << " if (Len > " << I->first.size() + << " && !memcmp(Name, \"" << I->first << ".\", " + << (I->first.size() + 1) << ")) return Intrinsic::" + << Ints[I->second].EnumName << ";\n"; + else + OS << " if (Len == " << I->first.size() + << " && !memcmp(Name, \"" << I->first << "\", " + << I->first.size() << ")) return Intrinsic::" + << Ints[I->second].EnumName << ";\n"; } OS << " }\n"; - OS << " // The 'llvm.' namespace is reserved!\n"; - OS << " assert(0 && \"Unknown LLVM intrinsic function!\");\n"; OS << "#endif\n\n"; } void IntrinsicEmitter:: EmitIntrinsicToNameTable(const std::vector &Ints, std::ostream &OS) { - std::vector Names; - for (unsigned i = 0, e = Ints.size(); i != e; ++i) - Names.push_back(Ints[i].Name); - std::sort(Names.begin(), Names.end()); - OS << "// Intrinsic ID to name table\n"; OS << "#ifdef GET_INTRINSIC_NAME_TABLE\n"; OS << " // Note that entry #0 is the invalid intrinsic!\n"; - for (unsigned i = 0, e = Names.size(); i != e; ++i) - OS << " \"" << Names[i] << "\",\n"; + for (unsigned i = 0, e = Ints.size(); i != e; ++i) + OS << " \"" << Ints[i].Name << "\",\n"; OS << "#endif\n\n"; } -static void EmitTypeVerify(std::ostream &OS, const std::string &Val, - Record *ArgType) { - OS << " Assert1(" << Val << "->getTypeID() == " - << ArgType->getValueAsString("TypeVal") << ",\n" - << " \"Illegal intrinsic type!\", IF);\n"; - - // If this is a packed type, check that the subtype and size are correct. - if (ArgType->isSubClassOf("LLVMPackedType")) { - Record *SubType = ArgType->getValueAsDef("ElTy"); - OS << " Assert1(cast(" << Val - << ")->getElementType()->getTypeID() == " - << SubType->getValueAsString("TypeVal") << ",\n" - << " \"Illegal intrinsic type!\", IF);\n"; - OS << " Assert1(cast(" << Val << ")->getNumElements() == " - << ArgType->getValueAsInt("NumElts") << ",\n" - << " \"Illegal intrinsic type!\", IF);\n"; +static void EmitTypeForValueType(std::ostream &OS, MVT::SimpleValueType VT) { + if (MVT(VT).isInteger()) { + unsigned BitWidth = MVT(VT).getSizeInBits(); + OS << "IntegerType::get(" << BitWidth << ")"; + } else if (VT == MVT::Other) { + // MVT::OtherVT is used to mean the empty struct type here. + OS << "StructType::get(std::vector())"; + } else if (VT == MVT::f32) { + OS << "Type::FloatTy"; + } else if (VT == MVT::f64) { + OS << "Type::DoubleTy"; + } else if (VT == MVT::f80) { + OS << "Type::X86_FP80Ty"; + } else if (VT == MVT::f128) { + OS << "Type::FP128Ty"; + } else if (VT == MVT::ppcf128) { + OS << "Type::PPC_FP128Ty"; + } else if (VT == MVT::isVoid) { + OS << "Type::VoidTy"; + } else { + assert(false && "Unsupported ValueType!"); } } +static void EmitTypeGenerate(std::ostream &OS, const Record *ArgType, + unsigned &ArgNo); + +static void EmitTypeGenerate(std::ostream &OS, + const std::vector &ArgTypes, + unsigned &ArgNo) { + if (ArgTypes.size() == 1) { + EmitTypeGenerate(OS, ArgTypes.front(), ArgNo); + return; + } + + OS << "StructType::get("; + + for (std::vector::const_iterator + I = ArgTypes.begin(), E = ArgTypes.end(); I != E; ++I) { + EmitTypeGenerate(OS, *I, ArgNo); + OS << ", "; + } + + OS << " NULL)"; +} + +static void EmitTypeGenerate(std::ostream &OS, const Record *ArgType, + unsigned &ArgNo) { + MVT::SimpleValueType VT = getValueType(ArgType->getValueAsDef("VT")); + + if (ArgType->isSubClassOf("LLVMMatchType")) { + unsigned Number = ArgType->getValueAsInt("Number"); + assert(Number < ArgNo && "Invalid matching number!"); + if (ArgType->isSubClassOf("LLVMExtendedElementVectorType")) + OS << "VectorType::getExtendedElementVectorType" + << "(dyn_cast(Tys[" << Number << "]))"; + else if (ArgType->isSubClassOf("LLVMTruncatedElementVectorType")) + OS << "VectorType::getTruncatedElementVectorType" + << "(dyn_cast(Tys[" << Number << "]))"; + else + OS << "Tys[" << Number << "]"; + } else if (VT == MVT::iAny || VT == MVT::fAny) { + // NOTE: The ArgNo variable here is not the absolute argument number, it is + // the index of the "arbitrary" type in the Tys array passed to the + // Intrinsic::getDeclaration function. Consequently, we only want to + // increment it when we actually hit an overloaded type. Getting this wrong + // leads to very subtle bugs! + OS << "Tys[" << ArgNo++ << "]"; + } else if (MVT(VT).isVector()) { + MVT VVT = VT; + OS << "VectorType::get("; + EmitTypeForValueType(OS, VVT.getVectorElementType().getSimpleVT()); + OS << ", " << VVT.getVectorNumElements() << ")"; + } else if (VT == MVT::iPTR) { + OS << "PointerType::getUnqual("; + EmitTypeGenerate(OS, ArgType->getValueAsDef("ElTy"), ArgNo); + OS << ")"; + } else if (VT == MVT::iPTRAny) { + // Make sure the user has passed us an argument type to overload. If not, + // treat it as an ordinary (not overloaded) intrinsic. + OS << "(" << ArgNo << " < numTys) ? Tys[" << ArgNo + << "] : PointerType::getUnqual("; + EmitTypeGenerate(OS, ArgType->getValueAsDef("ElTy"), ArgNo); + OS << ")"; + ++ArgNo; + } else if (VT == MVT::isVoid) { + if (ArgNo == 0) + OS << "Type::VoidTy"; + else + // MVT::isVoid is used to mean varargs here. + OS << "..."; + } else { + EmitTypeForValueType(OS, VT); + } +} + +/// RecordListComparator - Provide a determinstic comparator for lists of +/// records. +namespace { + typedef std::pair, std::vector > RecPair; + struct RecordListComparator { + bool operator()(const RecPair &LHS, + const RecPair &RHS) const { + unsigned i = 0; + const std::vector *LHSVec = &LHS.first; + const std::vector *RHSVec = &RHS.first; + unsigned RHSSize = RHSVec->size(); + unsigned LHSSize = LHSVec->size(); + + do { + if (i == RHSSize) return false; // RHS is shorter than LHS. + if ((*LHSVec)[i] != (*RHSVec)[i]) + return (*LHSVec)[i]->getName() < (*RHSVec)[i]->getName(); + } while (++i != LHSSize); + + if (i != RHSSize) return true; + + i = 0; + LHSVec = &LHS.second; + RHSVec = &RHS.second; + RHSSize = RHSVec->size(); + LHSSize = LHSVec->size(); + + for (i = 0; i != LHSSize; ++i) { + if (i == RHSSize) return false; // RHS is shorter than LHS. + if ((*LHSVec)[i] != (*RHSVec)[i]) + return (*LHSVec)[i]->getName() < (*RHSVec)[i]->getName(); + } + + return i != RHSSize; + } + }; +} + void IntrinsicEmitter::EmitVerifier(const std::vector &Ints, std::ostream &OS) { OS << "// Verifier::visitIntrinsicFunctionCall code.\n"; OS << "#ifdef GET_INTRINSIC_VERIFIER\n"; OS << " switch (ID) {\n"; OS << " default: assert(0 && \"Invalid intrinsic!\");\n"; - for (unsigned i = 0, e = Ints.size(); i != e; ++i) { - OS << " case Intrinsic::" << Ints[i].EnumName << ":\t\t// " - << Ints[i].Name << "\n"; - OS << " Assert1(FTy->getNumParams() == " << Ints[i].ArgTypes.size()-1 - << ",\n" - << " \"Illegal # arguments for intrinsic function!\", IF);\n"; - EmitTypeVerify(OS, "FTy->getReturnType()", Ints[i].ArgTypeDefs[0]); - for (unsigned j = 1; j != Ints[i].ArgTypes.size(); ++j) - EmitTypeVerify(OS, "FTy->getParamType(" + utostr(j-1) + ")", - Ints[i].ArgTypeDefs[j]); + + // This checking can emit a lot of very common code. To reduce the amount of + // code that we emit, batch up cases that have identical types. This avoids + // problems where GCC can run out of memory compiling Verifier.cpp. + typedef std::map, RecordListComparator> MapTy; + MapTy UniqueArgInfos; + + // Compute the unique argument type info. + for (unsigned i = 0, e = Ints.size(); i != e; ++i) + UniqueArgInfos[make_pair(Ints[i].IS.RetTypeDefs, + Ints[i].IS.ParamTypeDefs)].push_back(i); + + // Loop through the array, emitting one comparison for each batch. + for (MapTy::iterator I = UniqueArgInfos.begin(), + E = UniqueArgInfos.end(); I != E; ++I) { + for (unsigned i = 0, e = I->second.size(); i != e; ++i) + OS << " case Intrinsic::" << Ints[I->second[i]].EnumName << ":\t\t// " + << Ints[I->second[i]].Name << "\n"; + + const RecPair &ArgTypes = I->first; + const std::vector &RetTys = ArgTypes.first; + const std::vector &ParamTys = ArgTypes.second; + + OS << " VerifyIntrinsicPrototype(ID, IF, " << RetTys.size() << ", " + << ParamTys.size(); + + // Emit return types. + for (unsigned j = 0, je = RetTys.size(); j != je; ++j) { + Record *ArgType = RetTys[j]; + OS << ", "; + + if (ArgType->isSubClassOf("LLVMMatchType")) { + unsigned Number = ArgType->getValueAsInt("Number"); + assert(Number < j && "Invalid matching number!"); + if (ArgType->isSubClassOf("LLVMExtendedElementVectorType")) + OS << "~(ExtendedElementVectorType | " << Number << ")"; + else if (ArgType->isSubClassOf("LLVMTruncatedElementVectorType")) + OS << "~(TruncatedElementVectorType | " << Number << ")"; + else + OS << "~" << Number; + } else { + MVT::SimpleValueType VT = getValueType(ArgType->getValueAsDef("VT")); + OS << getEnumName(VT); + + if (VT == MVT::isVoid && j != 0 && j != je - 1) + throw "Var arg type not last argument"; + } + } + + // Emit the parameter types. + for (unsigned j = 0, je = ParamTys.size(); j != je; ++j) { + Record *ArgType = ParamTys[j]; + OS << ", "; + + if (ArgType->isSubClassOf("LLVMMatchType")) { + unsigned Number = ArgType->getValueAsInt("Number"); + assert(Number < j + RetTys.size() && "Invalid matching number!"); + if (ArgType->isSubClassOf("LLVMExtendedElementVectorType")) + OS << "~(ExtendedElementVectorType | " << Number << ")"; + else if (ArgType->isSubClassOf("LLVMTruncatedElementVectorType")) + OS << "~(TruncatedElementVectorType | " << Number << ")"; + else + OS << "~" << Number; + } else { + MVT::SimpleValueType VT = getValueType(ArgType->getValueAsDef("VT")); + OS << getEnumName(VT); + + if (VT == MVT::isVoid && j != 0 && j != je - 1) + throw "Var arg type not last argument"; + } + } + + OS << ");\n"; OS << " break;\n"; } OS << " }\n"; OS << "#endif\n\n"; } -void IntrinsicEmitter::EmitModRefInfo(const std::vector &Ints, - std::ostream &OS) { - OS << "// BasicAliasAnalysis code.\n"; - OS << "#ifdef GET_MODREF_BEHAVIOR\n"; - for (unsigned i = 0, e = Ints.size(); i != e; ++i) { - switch (Ints[i].ModRef) { - default: break; - case CodeGenIntrinsic::NoMem: - OS << " NoMemoryTable.push_back(\"" << Ints[i].Name << "\");\n"; - break; - case CodeGenIntrinsic::ReadArgMem: - case CodeGenIntrinsic::ReadMem: - OS << " OnlyReadsMemoryTable.push_back(\"" << Ints[i].Name << "\");\n"; - break; +void IntrinsicEmitter::EmitGenerator(const std::vector &Ints, + std::ostream &OS) { + OS << "// Code for generating Intrinsic function declarations.\n"; + OS << "#ifdef GET_INTRINSIC_GENERATOR\n"; + OS << " switch (id) {\n"; + OS << " default: assert(0 && \"Invalid intrinsic!\");\n"; + + // Similar to GET_INTRINSIC_VERIFIER, batch up cases that have identical + // types. + typedef std::map, RecordListComparator> MapTy; + MapTy UniqueArgInfos; + + // Compute the unique argument type info. + for (unsigned i = 0, e = Ints.size(); i != e; ++i) + UniqueArgInfos[make_pair(Ints[i].IS.RetTypeDefs, + Ints[i].IS.ParamTypeDefs)].push_back(i); + + // Loop through the array, emitting one generator for each batch. + for (MapTy::iterator I = UniqueArgInfos.begin(), + E = UniqueArgInfos.end(); I != E; ++I) { + for (unsigned i = 0, e = I->second.size(); i != e; ++i) + OS << " case Intrinsic::" << Ints[I->second[i]].EnumName << ":\t\t// " + << Ints[I->second[i]].Name << "\n"; + + const RecPair &ArgTypes = I->first; + const std::vector &RetTys = ArgTypes.first; + const std::vector &ParamTys = ArgTypes.second; + + unsigned N = ParamTys.size(); + + if (N > 1 && + getValueType(ParamTys[N - 1]->getValueAsDef("VT")) == MVT::isVoid) { + OS << " IsVarArg = true;\n"; + --N; + } + + unsigned ArgNo = 0; + OS << " ResultTy = "; + EmitTypeGenerate(OS, RetTys, ArgNo); + OS << ";\n"; + + for (unsigned j = 0; j != N; ++j) { + OS << " ArgTys.push_back("; + EmitTypeGenerate(OS, ParamTys[j], ArgNo); + OS << ");\n"; } + + OS << " break;\n"; } + + OS << " }\n"; OS << "#endif\n\n"; } void IntrinsicEmitter:: -EmitSideEffectInfo(const std::vector &Ints, std::ostream &OS){ - OS << "// isInstructionTriviallyDead code.\n"; - OS << "#ifdef GET_SIDE_EFFECT_INFO\n"; - OS << " switch (F->getIntrinsicID()) {\n"; +EmitAttributes(const std::vector &Ints, std::ostream &OS) { + OS << "// Add parameter attributes that are not common to all intrinsics.\n"; + OS << "#ifdef GET_INTRINSIC_ATTRIBUTES\n"; + OS << " switch (id) {\n"; OS << " default: break;\n"; for (unsigned i = 0, e = Ints.size(); i != e; ++i) { switch (Ints[i].ModRef) { default: break; case CodeGenIntrinsic::NoMem: + OS << " case Intrinsic::" << Ints[i].EnumName << ":\n"; + break; + } + } + OS << " Attr |= Attribute::ReadNone; // These do not access memory.\n"; + OS << " break;\n"; + for (unsigned i = 0, e = Ints.size(); i != e; ++i) { + switch (Ints[i].ModRef) { + default: break; case CodeGenIntrinsic::ReadArgMem: case CodeGenIntrinsic::ReadMem: OS << " case Intrinsic::" << Ints[i].EnumName << ":\n"; break; } } - OS << " return true; // These intrinsics have no side effects.\n"; + OS << " Attr |= Attribute::ReadOnly; // These do not write memory.\n"; + OS << " break;\n"; OS << " }\n"; OS << "#endif\n\n"; } @@ -289,16 +434,124 @@ EmitGCCBuiltinList(const std::vector &Ints, std::ostream &OS){ OS << "#endif\n\n"; } +/// EmitBuiltinComparisons - Emit comparisons to determine whether the specified +/// sorted range of builtin names is equal to the current builtin. This breaks +/// it down into a simple tree. +/// +/// At this point, we know that all the builtins in the range have the same name +/// for the first 'CharStart' characters. Only the end of the name needs to be +/// discriminated. +typedef std::map::const_iterator StrMapIterator; +static void EmitBuiltinComparisons(StrMapIterator Start, StrMapIterator End, + unsigned CharStart, unsigned Indent, + std::ostream &OS) { + if (Start == End) return; // empty range. + + // Determine what, if anything, is the same about all these strings. + std::string CommonString = Start->first; + unsigned NumInRange = 0; + for (StrMapIterator I = Start; I != End; ++I, ++NumInRange) { + // Find the first character that doesn't match. + const std::string &ThisStr = I->first; + unsigned NonMatchChar = CharStart; + while (NonMatchChar < CommonString.size() && + NonMatchChar < ThisStr.size() && + CommonString[NonMatchChar] == ThisStr[NonMatchChar]) + ++NonMatchChar; + // Truncate off pieces that don't match. + CommonString.resize(NonMatchChar); + } + + // Just compare the rest of the string. + if (NumInRange == 1) { + if (CharStart != CommonString.size()) { + OS << std::string(Indent*2, ' ') << "if (!memcmp(BuiltinName"; + if (CharStart) OS << "+" << CharStart; + OS << ", \"" << (CommonString.c_str()+CharStart) << "\", "; + OS << CommonString.size() - CharStart << "))\n"; + ++Indent; + } + OS << std::string(Indent*2, ' ') << "IntrinsicID = Intrinsic::"; + OS << Start->second << ";\n"; + return; + } + + // At this point, we potentially have a common prefix for these builtins, emit + // a check for this common prefix. + if (CommonString.size() != CharStart) { + OS << std::string(Indent*2, ' ') << "if (!memcmp(BuiltinName"; + if (CharStart) OS << "+" << CharStart; + OS << ", \"" << (CommonString.c_str()+CharStart) << "\", "; + OS << CommonString.size()-CharStart << ")) {\n"; + + EmitBuiltinComparisons(Start, End, CommonString.size(), Indent+1, OS); + OS << std::string(Indent*2, ' ') << "}\n"; + return; + } + + // Output a switch on the character that differs across the set. + OS << std::string(Indent*2, ' ') << "switch (BuiltinName[" << CharStart + << "]) {"; + if (CharStart) + OS << " // \"" << std::string(Start->first.begin(), + Start->first.begin()+CharStart) << "\""; + OS << "\n"; + + for (StrMapIterator I = Start; I != End; ) { + char ThisChar = I->first[CharStart]; + OS << std::string(Indent*2, ' ') << "case '" << ThisChar << "':\n"; + // Figure out the range that has this common character. + StrMapIterator NextChar = I; + for (++NextChar; NextChar != End && NextChar->first[CharStart] == ThisChar; + ++NextChar) + /*empty*/; + EmitBuiltinComparisons(I, NextChar, CharStart+1, Indent+1, OS); + OS << std::string(Indent*2, ' ') << " break;\n"; + I = NextChar; + } + OS << std::string(Indent*2, ' ') << "}\n"; +} + +/// EmitTargetBuiltins - All of the builtins in the specified map are for the +/// same target, and we already checked it. +static void EmitTargetBuiltins(const std::map &BIM, + std::ostream &OS) { + // Rearrange the builtins by length. + std::vector > BuiltinsByLen; + BuiltinsByLen.reserve(100); + + for (StrMapIterator I = BIM.begin(), E = BIM.end(); I != E; ++I) { + if (I->first.size() >= BuiltinsByLen.size()) + BuiltinsByLen.resize(I->first.size()+1); + BuiltinsByLen[I->first.size()].insert(*I); + } + + // Now that we have all the builtins by their length, emit a switch stmt. + OS << " switch (strlen(BuiltinName)) {\n"; + OS << " default: break;\n"; + for (unsigned i = 0, e = BuiltinsByLen.size(); i != e; ++i) { + if (BuiltinsByLen[i].empty()) continue; + OS << " case " << i << ":\n"; + EmitBuiltinComparisons(BuiltinsByLen[i].begin(), BuiltinsByLen[i].end(), + 0, 3, OS); + OS << " break;\n"; + } + OS << " }\n"; +} + + void IntrinsicEmitter:: EmitIntrinsicToGCCBuiltinMap(const std::vector &Ints, std::ostream &OS) { - typedef std::map, std::string> BIMTy; + typedef std::map > BIMTy; BIMTy BuiltinMap; for (unsigned i = 0, e = Ints.size(); i != e; ++i) { if (!Ints[i].GCCBuiltinName.empty()) { - std::pair Key(Ints[i].GCCBuiltinName, - Ints[i].TargetPrefix); - if (!BuiltinMap.insert(std::make_pair(Key, Ints[i].EnumName)).second) + // Get the map for this target prefix. + std::map &BIM =BuiltinMap[Ints[i].TargetPrefix]; + + if (!BIM.insert(std::make_pair(Ints[i].GCCBuiltinName, + Ints[i].EnumName)).second) throw "Intrinsic '" + Ints[i].TheDef->getName() + "': duplicate GCC builtin name!"; } @@ -309,19 +562,20 @@ EmitIntrinsicToGCCBuiltinMap(const std::vector &Ints, OS << "// in as BuiltinName, and a target prefix (e.g. 'ppc') is passed\n"; OS << "// in as TargetPrefix. The result is assigned to 'IntrinsicID'.\n"; OS << "#ifdef GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN\n"; - OS << " if (0);\n"; + OS << " IntrinsicID = Intrinsic::not_intrinsic;\n"; + // Note: this could emit significantly better code if we cared. for (BIMTy::iterator I = BuiltinMap.begin(), E = BuiltinMap.end();I != E;++I){ - OS << " else if ("; - if (!I->first.second.empty()) { - // Emit this as a strcmp, so it can be constant folded by the FE. - OS << "!strcmp(TargetPrefix, \"" << I->first.second << "\") &&\n" - << " "; - } - OS << "!strcmp(BuiltinName, \"" << I->first.first << "\"))\n"; - OS << " IntrinsicID = Intrinsic::" << I->second << ";\n"; + OS << " "; + if (!I->first.empty()) + OS << "if (!strcmp(TargetPrefix, \"" << I->first << "\")) "; + else + OS << "/* Target Independent Builtins */ "; + OS << "{\n"; + + // Emit the comparisons for this target prefix. + EmitTargetBuiltins(I->second, OS); + OS << " }\n"; } - OS << " else\n"; - OS << " IntrinsicID = Intrinsic::not_intrinsic;\n"; OS << "#endif\n\n"; }