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Diffstat (limited to 'contrib/llvm/utils/TableGen/IntrinsicEmitter.cpp')
| -rw-r--r-- | contrib/llvm/utils/TableGen/IntrinsicEmitter.cpp | 747 |
1 files changed, 747 insertions, 0 deletions
diff --git a/contrib/llvm/utils/TableGen/IntrinsicEmitter.cpp b/contrib/llvm/utils/TableGen/IntrinsicEmitter.cpp new file mode 100644 index 0000000..df4d847 --- /dev/null +++ b/contrib/llvm/utils/TableGen/IntrinsicEmitter.cpp @@ -0,0 +1,747 @@ +//===- IntrinsicEmitter.cpp - Generate intrinsic information --------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This tablegen backend emits information about intrinsic functions. +// +//===----------------------------------------------------------------------===// + +#include "CodeGenIntrinsics.h" +#include "CodeGenTarget.h" +#include "SequenceToOffsetTable.h" +#include "llvm/ADT/StringExtras.h" +#include "llvm/TableGen/Error.h" +#include "llvm/TableGen/Record.h" +#include "llvm/TableGen/StringMatcher.h" +#include "llvm/TableGen/TableGenBackend.h" +#include <algorithm> +using namespace llvm; + +namespace { +class IntrinsicEmitter { + RecordKeeper &Records; + bool TargetOnly; + std::string TargetPrefix; + +public: + IntrinsicEmitter(RecordKeeper &R, bool T) + : Records(R), TargetOnly(T) {} + + void run(raw_ostream &OS); + + void EmitPrefix(raw_ostream &OS); + + void EmitEnumInfo(const std::vector<CodeGenIntrinsic> &Ints, + raw_ostream &OS); + + void EmitFnNameRecognizer(const std::vector<CodeGenIntrinsic> &Ints, + raw_ostream &OS); + void EmitIntrinsicToNameTable(const std::vector<CodeGenIntrinsic> &Ints, + raw_ostream &OS); + void EmitIntrinsicToOverloadTable(const std::vector<CodeGenIntrinsic> &Ints, + raw_ostream &OS); + void EmitVerifier(const std::vector<CodeGenIntrinsic> &Ints, + raw_ostream &OS); + void EmitGenerator(const std::vector<CodeGenIntrinsic> &Ints, + raw_ostream &OS); + void EmitAttributes(const std::vector<CodeGenIntrinsic> &Ints, + raw_ostream &OS); + void EmitModRefBehavior(const std::vector<CodeGenIntrinsic> &Ints, + raw_ostream &OS); + void EmitIntrinsicToGCCBuiltinMap(const std::vector<CodeGenIntrinsic> &Ints, + raw_ostream &OS); + void EmitSuffix(raw_ostream &OS); +}; +} // End anonymous namespace + +//===----------------------------------------------------------------------===// +// IntrinsicEmitter Implementation +//===----------------------------------------------------------------------===// + +void IntrinsicEmitter::run(raw_ostream &OS) { + emitSourceFileHeader("Intrinsic Function Source Fragment", OS); + + std::vector<CodeGenIntrinsic> Ints = LoadIntrinsics(Records, TargetOnly); + + if (TargetOnly && !Ints.empty()) + TargetPrefix = Ints[0].TargetPrefix; + + EmitPrefix(OS); + + // Emit the enum information. + EmitEnumInfo(Ints, OS); + + // Emit the intrinsic ID -> name table. + EmitIntrinsicToNameTable(Ints, OS); + + // Emit the intrinsic ID -> overload table. + EmitIntrinsicToOverloadTable(Ints, OS); + + // Emit the function name recognizer. + EmitFnNameRecognizer(Ints, OS); + + // Emit the intrinsic declaration generator. + EmitGenerator(Ints, OS); + + // Emit the intrinsic parameter attributes. + EmitAttributes(Ints, OS); + + // Emit intrinsic alias analysis mod/ref behavior. + EmitModRefBehavior(Ints, OS); + + // Emit code to translate GCC builtins into LLVM intrinsics. + EmitIntrinsicToGCCBuiltinMap(Ints, OS); + + EmitSuffix(OS); +} + +void IntrinsicEmitter::EmitPrefix(raw_ostream &OS) { + OS << "// VisualStudio defines setjmp as _setjmp\n" + "#if defined(_MSC_VER) && defined(setjmp) && \\\n" + " !defined(setjmp_undefined_for_msvc)\n" + "# pragma push_macro(\"setjmp\")\n" + "# undef setjmp\n" + "# define setjmp_undefined_for_msvc\n" + "#endif\n\n"; +} + +void IntrinsicEmitter::EmitSuffix(raw_ostream &OS) { + OS << "#if defined(_MSC_VER) && defined(setjmp_undefined_for_msvc)\n" + "// let's return it to _setjmp state\n" + "# pragma pop_macro(\"setjmp\")\n" + "# undef setjmp_undefined_for_msvc\n" + "#endif\n\n"; +} + +void IntrinsicEmitter::EmitEnumInfo(const std::vector<CodeGenIntrinsic> &Ints, + raw_ostream &OS) { + OS << "// Enum values for Intrinsics.h\n"; + OS << "#ifdef GET_INTRINSIC_ENUM_VALUES\n"; + for (unsigned i = 0, e = Ints.size(); i != e; ++i) { + OS << " " << Ints[i].EnumName; + OS << ((i != e-1) ? ", " : " "); + OS << std::string(40-Ints[i].EnumName.size(), ' ') + << "// " << Ints[i].Name << "\n"; + } + OS << "#endif\n\n"; +} + +void IntrinsicEmitter:: +EmitFnNameRecognizer(const std::vector<CodeGenIntrinsic> &Ints, + raw_ostream &OS) { + // Build a 'first character of function name' -> intrinsic # mapping. + std::map<char, std::vector<unsigned> > IntMapping; + for (unsigned i = 0, e = Ints.size(); i != e; ++i) + IntMapping[Ints[i].Name[5]].push_back(i); + + OS << "// Function name -> enum value recognizer code.\n"; + OS << "#ifdef GET_FUNCTION_RECOGNIZER\n"; + OS << " StringRef NameR(Name+6, Len-6); // Skip over 'llvm.'\n"; + OS << " switch (Name[5]) { // Dispatch on first letter.\n"; + OS << " default: break;\n"; + // Emit the intrinsic matching stuff by first letter. + for (std::map<char, std::vector<unsigned> >::iterator I = IntMapping.begin(), + E = IntMapping.end(); I != E; ++I) { + OS << " case '" << I->first << "':\n"; + std::vector<unsigned> &IntList = I->second; + + // Emit all the overloaded intrinsics first, build a table of the + // non-overloaded ones. + std::vector<StringMatcher::StringPair> MatchTable; + + for (unsigned i = 0, e = IntList.size(); i != e; ++i) { + unsigned IntNo = IntList[i]; + std::string Result = "return " + TargetPrefix + "Intrinsic::" + + Ints[IntNo].EnumName + ";"; + + if (!Ints[IntNo].isOverloaded) { + MatchTable.push_back(std::make_pair(Ints[IntNo].Name.substr(6),Result)); + continue; + } + + // For overloaded intrinsics, only the prefix needs to match + std::string TheStr = Ints[IntNo].Name.substr(6); + TheStr += '.'; // Require "bswap." instead of bswap. + OS << " if (NameR.startswith(\"" << TheStr << "\")) " + << Result << '\n'; + } + + // Emit the matcher logic for the fixed length strings. + StringMatcher("NameR", MatchTable, OS).Emit(1); + OS << " break; // end of '" << I->first << "' case.\n"; + } + + OS << " }\n"; + OS << "#endif\n\n"; +} + +void IntrinsicEmitter:: +EmitIntrinsicToNameTable(const std::vector<CodeGenIntrinsic> &Ints, + raw_ostream &OS) { + 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 = Ints.size(); i != e; ++i) + OS << " \"" << Ints[i].Name << "\",\n"; + OS << "#endif\n\n"; +} + +void IntrinsicEmitter:: +EmitIntrinsicToOverloadTable(const std::vector<CodeGenIntrinsic> &Ints, + raw_ostream &OS) { + OS << "// Intrinsic ID to overload bitset\n"; + OS << "#ifdef GET_INTRINSIC_OVERLOAD_TABLE\n"; + OS << "static const uint8_t OTable[] = {\n"; + OS << " 0"; + for (unsigned i = 0, e = Ints.size(); i != e; ++i) { + // Add one to the index so we emit a null bit for the invalid #0 intrinsic. + if ((i+1)%8 == 0) + OS << ",\n 0"; + if (Ints[i].isOverloaded) + OS << " | (1<<" << (i+1)%8 << ')'; + } + OS << "\n};\n\n"; + // OTable contains a true bit at the position if the intrinsic is overloaded. + OS << "return (OTable[id/8] & (1 << (id%8))) != 0;\n"; + OS << "#endif\n\n"; +} + + +// NOTE: This must be kept in synch with the copy in lib/VMCore/Function.cpp! +enum IIT_Info { + // Common values should be encoded with 0-15. + IIT_Done = 0, + IIT_I1 = 1, + IIT_I8 = 2, + IIT_I16 = 3, + IIT_I32 = 4, + IIT_I64 = 5, + IIT_F16 = 6, + IIT_F32 = 7, + IIT_F64 = 8, + IIT_V2 = 9, + IIT_V4 = 10, + IIT_V8 = 11, + IIT_V16 = 12, + IIT_V32 = 13, + IIT_PTR = 14, + IIT_ARG = 15, + + // Values from 16+ are only encodable with the inefficient encoding. + IIT_MMX = 16, + IIT_METADATA = 17, + IIT_EMPTYSTRUCT = 18, + IIT_STRUCT2 = 19, + IIT_STRUCT3 = 20, + IIT_STRUCT4 = 21, + IIT_STRUCT5 = 22, + IIT_EXTEND_VEC_ARG = 23, + IIT_TRUNC_VEC_ARG = 24, + IIT_ANYPTR = 25 +}; + + +static void EncodeFixedValueType(MVT::SimpleValueType VT, + std::vector<unsigned char> &Sig) { + if (EVT(VT).isInteger()) { + unsigned BitWidth = EVT(VT).getSizeInBits(); + switch (BitWidth) { + default: PrintFatalError("unhandled integer type width in intrinsic!"); + case 1: return Sig.push_back(IIT_I1); + case 8: return Sig.push_back(IIT_I8); + case 16: return Sig.push_back(IIT_I16); + case 32: return Sig.push_back(IIT_I32); + case 64: return Sig.push_back(IIT_I64); + } + } + + switch (VT) { + default: PrintFatalError("unhandled MVT in intrinsic!"); + case MVT::f16: return Sig.push_back(IIT_F16); + case MVT::f32: return Sig.push_back(IIT_F32); + case MVT::f64: return Sig.push_back(IIT_F64); + case MVT::Metadata: return Sig.push_back(IIT_METADATA); + case MVT::x86mmx: return Sig.push_back(IIT_MMX); + // MVT::OtherVT is used to mean the empty struct type here. + case MVT::Other: return Sig.push_back(IIT_EMPTYSTRUCT); + } +} + +#ifdef _MSC_VER +#pragma optimize("",off) // MSVC 2010 optimizer can't deal with this function. +#endif + +static void EncodeFixedType(Record *R, std::vector<unsigned char> &ArgCodes, + std::vector<unsigned char> &Sig) { + + if (R->isSubClassOf("LLVMMatchType")) { + unsigned Number = R->getValueAsInt("Number"); + assert(Number < ArgCodes.size() && "Invalid matching number!"); + if (R->isSubClassOf("LLVMExtendedElementVectorType")) + Sig.push_back(IIT_EXTEND_VEC_ARG); + else if (R->isSubClassOf("LLVMTruncatedElementVectorType")) + Sig.push_back(IIT_TRUNC_VEC_ARG); + else + Sig.push_back(IIT_ARG); + return Sig.push_back((Number << 2) | ArgCodes[Number]); + } + + MVT::SimpleValueType VT = getValueType(R->getValueAsDef("VT")); + + unsigned Tmp = 0; + switch (VT) { + default: break; + case MVT::iPTRAny: ++Tmp; // FALL THROUGH. + case MVT::vAny: ++Tmp; // FALL THROUGH. + case MVT::fAny: ++Tmp; // FALL THROUGH. + case MVT::iAny: { + // If this is an "any" valuetype, then the type is the type of the next + // type in the list specified to getIntrinsic(). + Sig.push_back(IIT_ARG); + + // Figure out what arg # this is consuming, and remember what kind it was. + unsigned ArgNo = ArgCodes.size(); + ArgCodes.push_back(Tmp); + + // Encode what sort of argument it must be in the low 2 bits of the ArgNo. + return Sig.push_back((ArgNo << 2) | Tmp); + } + + case MVT::iPTR: { + unsigned AddrSpace = 0; + if (R->isSubClassOf("LLVMQualPointerType")) { + AddrSpace = R->getValueAsInt("AddrSpace"); + assert(AddrSpace < 256 && "Address space exceeds 255"); + } + if (AddrSpace) { + Sig.push_back(IIT_ANYPTR); + Sig.push_back(AddrSpace); + } else { + Sig.push_back(IIT_PTR); + } + return EncodeFixedType(R->getValueAsDef("ElTy"), ArgCodes, Sig); + } + } + + if (EVT(VT).isVector()) { + EVT VVT = VT; + switch (VVT.getVectorNumElements()) { + default: PrintFatalError("unhandled vector type width in intrinsic!"); + case 2: Sig.push_back(IIT_V2); break; + case 4: Sig.push_back(IIT_V4); break; + case 8: Sig.push_back(IIT_V8); break; + case 16: Sig.push_back(IIT_V16); break; + case 32: Sig.push_back(IIT_V32); break; + } + + return EncodeFixedValueType(VVT.getVectorElementType(). + getSimpleVT().SimpleTy, Sig); + } + + EncodeFixedValueType(VT, Sig); +} + +#ifdef _MSC_VER +#pragma optimize("",on) +#endif + +/// ComputeFixedEncoding - If we can encode the type signature for this +/// intrinsic into 32 bits, return it. If not, return ~0U. +static void ComputeFixedEncoding(const CodeGenIntrinsic &Int, + std::vector<unsigned char> &TypeSig) { + std::vector<unsigned char> ArgCodes; + + if (Int.IS.RetVTs.empty()) + TypeSig.push_back(IIT_Done); + else if (Int.IS.RetVTs.size() == 1 && + Int.IS.RetVTs[0] == MVT::isVoid) + TypeSig.push_back(IIT_Done); + else { + switch (Int.IS.RetVTs.size()) { + case 1: break; + case 2: TypeSig.push_back(IIT_STRUCT2); break; + case 3: TypeSig.push_back(IIT_STRUCT3); break; + case 4: TypeSig.push_back(IIT_STRUCT4); break; + case 5: TypeSig.push_back(IIT_STRUCT5); break; + default: assert(0 && "Unhandled case in struct"); + } + + for (unsigned i = 0, e = Int.IS.RetVTs.size(); i != e; ++i) + EncodeFixedType(Int.IS.RetTypeDefs[i], ArgCodes, TypeSig); + } + + for (unsigned i = 0, e = Int.IS.ParamTypeDefs.size(); i != e; ++i) + EncodeFixedType(Int.IS.ParamTypeDefs[i], ArgCodes, TypeSig); +} + +static void printIITEntry(raw_ostream &OS, unsigned char X) { + OS << (unsigned)X; +} + +void IntrinsicEmitter::EmitGenerator(const std::vector<CodeGenIntrinsic> &Ints, + raw_ostream &OS) { + // If we can compute a 32-bit fixed encoding for this intrinsic, do so and + // capture it in this vector, otherwise store a ~0U. + std::vector<unsigned> FixedEncodings; + + SequenceToOffsetTable<std::vector<unsigned char> > LongEncodingTable; + + std::vector<unsigned char> TypeSig; + + // Compute the unique argument type info. + for (unsigned i = 0, e = Ints.size(); i != e; ++i) { + // Get the signature for the intrinsic. + TypeSig.clear(); + ComputeFixedEncoding(Ints[i], TypeSig); + + // Check to see if we can encode it into a 32-bit word. We can only encode + // 8 nibbles into a 32-bit word. + if (TypeSig.size() <= 8) { + bool Failed = false; + unsigned Result = 0; + for (unsigned i = 0, e = TypeSig.size(); i != e; ++i) { + // If we had an unencodable argument, bail out. + if (TypeSig[i] > 15) { + Failed = true; + break; + } + Result = (Result << 4) | TypeSig[e-i-1]; + } + + // If this could be encoded into a 31-bit word, return it. + if (!Failed && (Result >> 31) == 0) { + FixedEncodings.push_back(Result); + continue; + } + } + + // Otherwise, we're going to unique the sequence into the + // LongEncodingTable, and use its offset in the 32-bit table instead. + LongEncodingTable.add(TypeSig); + + // This is a placehold that we'll replace after the table is laid out. + FixedEncodings.push_back(~0U); + } + + LongEncodingTable.layout(); + + OS << "// Global intrinsic function declaration type table.\n"; + OS << "#ifdef GET_INTRINSIC_GENERATOR_GLOBAL\n"; + + OS << "static const unsigned IIT_Table[] = {\n "; + + for (unsigned i = 0, e = FixedEncodings.size(); i != e; ++i) { + if ((i & 7) == 7) + OS << "\n "; + + // If the entry fit in the table, just emit it. + if (FixedEncodings[i] != ~0U) { + OS << "0x" << utohexstr(FixedEncodings[i]) << ", "; + continue; + } + + TypeSig.clear(); + ComputeFixedEncoding(Ints[i], TypeSig); + + + // Otherwise, emit the offset into the long encoding table. We emit it this + // way so that it is easier to read the offset in the .def file. + OS << "(1U<<31) | " << LongEncodingTable.get(TypeSig) << ", "; + } + + OS << "0\n};\n\n"; + + // Emit the shared table of register lists. + OS << "static const unsigned char IIT_LongEncodingTable[] = {\n"; + if (!LongEncodingTable.empty()) + LongEncodingTable.emit(OS, printIITEntry); + OS << " 255\n};\n\n"; + + OS << "#endif\n\n"; // End of GET_INTRINSIC_GENERATOR_GLOBAL +} + +enum ModRefKind { + MRK_none, + MRK_readonly, + MRK_readnone +}; + +static ModRefKind getModRefKind(const CodeGenIntrinsic &intrinsic) { + switch (intrinsic.ModRef) { + case CodeGenIntrinsic::NoMem: + return MRK_readnone; + case CodeGenIntrinsic::ReadArgMem: + case CodeGenIntrinsic::ReadMem: + return MRK_readonly; + case CodeGenIntrinsic::ReadWriteArgMem: + case CodeGenIntrinsic::ReadWriteMem: + return MRK_none; + } + llvm_unreachable("bad mod-ref kind"); +} + +namespace { +struct AttributeComparator { + bool operator()(const CodeGenIntrinsic *L, const CodeGenIntrinsic *R) const { + // Sort throwing intrinsics after non-throwing intrinsics. + if (L->canThrow != R->canThrow) + return R->canThrow; + + if (L->isNoReturn != R->isNoReturn) + return R->isNoReturn; + + // Try to order by readonly/readnone attribute. + ModRefKind LK = getModRefKind(*L); + ModRefKind RK = getModRefKind(*R); + if (LK != RK) return (LK > RK); + + // Order by argument attributes. + // This is reliable because each side is already sorted internally. + return (L->ArgumentAttributes < R->ArgumentAttributes); + } +}; +} // End anonymous namespace + +/// EmitAttributes - This emits the Intrinsic::getAttributes method. +void IntrinsicEmitter:: +EmitAttributes(const std::vector<CodeGenIntrinsic> &Ints, raw_ostream &OS) { + OS << "// Add parameter attributes that are not common to all intrinsics.\n"; + OS << "#ifdef GET_INTRINSIC_ATTRIBUTES\n"; + if (TargetOnly) + OS << "static AttributeSet getAttributes(LLVMContext &C, " << TargetPrefix + << "Intrinsic::ID id) {\n"; + else + OS << "AttributeSet Intrinsic::getAttributes(LLVMContext &C, ID id) {\n"; + + // Compute the maximum number of attribute arguments and the map + typedef std::map<const CodeGenIntrinsic*, unsigned, + AttributeComparator> UniqAttrMapTy; + UniqAttrMapTy UniqAttributes; + unsigned maxArgAttrs = 0; + unsigned AttrNum = 0; + for (unsigned i = 0, e = Ints.size(); i != e; ++i) { + const CodeGenIntrinsic &intrinsic = Ints[i]; + maxArgAttrs = + std::max(maxArgAttrs, unsigned(intrinsic.ArgumentAttributes.size())); + unsigned &N = UniqAttributes[&intrinsic]; + if (N) continue; + assert(AttrNum < 256 && "Too many unique attributes for table!"); + N = ++AttrNum; + } + + // Emit an array of AttributeSet. Most intrinsics will have at least one + // entry, for the function itself (index ~1), which is usually nounwind. + OS << " static const uint8_t IntrinsicsToAttributesMap[] = {\n"; + + for (unsigned i = 0, e = Ints.size(); i != e; ++i) { + const CodeGenIntrinsic &intrinsic = Ints[i]; + + OS << " " << UniqAttributes[&intrinsic] << ", // " + << intrinsic.Name << "\n"; + } + OS << " };\n\n"; + + OS << " AttributeSet AS[" << maxArgAttrs+1 << "];\n"; + OS << " unsigned NumAttrs = 0;\n"; + OS << " if (id != 0) {\n"; + OS << " SmallVector<Attribute::AttrKind, 8> AttrVec;\n"; + OS << " switch(IntrinsicsToAttributesMap[id - "; + if (TargetOnly) + OS << "Intrinsic::num_intrinsics"; + else + OS << "1"; + OS << "]) {\n"; + OS << " default: llvm_unreachable(\"Invalid attribute number\");\n"; + for (UniqAttrMapTy::const_iterator I = UniqAttributes.begin(), + E = UniqAttributes.end(); I != E; ++I) { + OS << " case " << I->second << ":\n"; + + const CodeGenIntrinsic &intrinsic = *(I->first); + + // Keep track of the number of attributes we're writing out. + unsigned numAttrs = 0; + + // The argument attributes are alreadys sorted by argument index. + unsigned ai = 0, ae = intrinsic.ArgumentAttributes.size(); + if (ae) { + while (ai != ae) { + unsigned argNo = intrinsic.ArgumentAttributes[ai].first; + + OS << " AttrVec.clear();\n"; + + do { + switch (intrinsic.ArgumentAttributes[ai].second) { + case CodeGenIntrinsic::NoCapture: + OS << " AttrVec.push_back(Attribute::NoCapture);\n"; + break; + } + + ++ai; + } while (ai != ae && intrinsic.ArgumentAttributes[ai].first == argNo); + + OS << " AS[" << numAttrs++ << "] = AttributeSet::get(C, " + << argNo+1 << ", AttrVec);\n"; + } + } + + ModRefKind modRef = getModRefKind(intrinsic); + + if (!intrinsic.canThrow || modRef || intrinsic.isNoReturn) { + OS << " AttrVec.clear();\n"; + + if (!intrinsic.canThrow) + OS << " AttrVec.push_back(Attribute::NoUnwind);\n"; + if (intrinsic.isNoReturn) + OS << " AttrVec.push_back(Attribute::NoReturn);\n"; + + switch (modRef) { + case MRK_none: break; + case MRK_readonly: + OS << " AttrVec.push_back(Attribute::ReadOnly);\n"; + break; + case MRK_readnone: + OS << " AttrVec.push_back(Attribute::ReadNone);\n"; + break; + } + OS << " AS[" << numAttrs++ << "] = AttributeSet::get(C, " + << "AttributeSet::FunctionIndex, AttrVec);\n"; + } + + if (numAttrs) { + OS << " NumAttrs = " << numAttrs << ";\n"; + OS << " break;\n"; + } else { + OS << " return AttributeSet();\n"; + } + } + + OS << " }\n"; + OS << " }\n"; + OS << " return AttributeSet::get(C, ArrayRef<AttributeSet>(AS, " + "NumAttrs));\n"; + OS << "}\n"; + OS << "#endif // GET_INTRINSIC_ATTRIBUTES\n\n"; +} + +/// EmitModRefBehavior - Determine intrinsic alias analysis mod/ref behavior. +void IntrinsicEmitter:: +EmitModRefBehavior(const std::vector<CodeGenIntrinsic> &Ints, raw_ostream &OS){ + OS << "// Determine intrinsic alias analysis mod/ref behavior.\n" + << "#ifdef GET_INTRINSIC_MODREF_BEHAVIOR\n" + << "assert(iid <= Intrinsic::" << Ints.back().EnumName << " && " + << "\"Unknown intrinsic.\");\n\n"; + + OS << "static const uint8_t IntrinsicModRefBehavior[] = {\n" + << " /* invalid */ UnknownModRefBehavior,\n"; + for (unsigned i = 0, e = Ints.size(); i != e; ++i) { + OS << " /* " << TargetPrefix << Ints[i].EnumName << " */ "; + switch (Ints[i].ModRef) { + case CodeGenIntrinsic::NoMem: + OS << "DoesNotAccessMemory,\n"; + break; + case CodeGenIntrinsic::ReadArgMem: + OS << "OnlyReadsArgumentPointees,\n"; + break; + case CodeGenIntrinsic::ReadMem: + OS << "OnlyReadsMemory,\n"; + break; + case CodeGenIntrinsic::ReadWriteArgMem: + OS << "OnlyAccessesArgumentPointees,\n"; + break; + case CodeGenIntrinsic::ReadWriteMem: + OS << "UnknownModRefBehavior,\n"; + break; + } + } + OS << "};\n\n" + << "return static_cast<ModRefBehavior>(IntrinsicModRefBehavior[iid]);\n" + << "#endif // GET_INTRINSIC_MODREF_BEHAVIOR\n\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<std::string, std::string> &BIM, + const std::string &TargetPrefix, + raw_ostream &OS) { + + std::vector<StringMatcher::StringPair> Results; + + for (std::map<std::string, std::string>::const_iterator I = BIM.begin(), + E = BIM.end(); I != E; ++I) { + std::string ResultCode = + "return " + TargetPrefix + "Intrinsic::" + I->second + ";"; + Results.push_back(StringMatcher::StringPair(I->first, ResultCode)); + } + + StringMatcher("BuiltinName", Results, OS).Emit(); +} + + +void IntrinsicEmitter:: +EmitIntrinsicToGCCBuiltinMap(const std::vector<CodeGenIntrinsic> &Ints, + raw_ostream &OS) { + typedef std::map<std::string, std::map<std::string, std::string> > BIMTy; + BIMTy BuiltinMap; + for (unsigned i = 0, e = Ints.size(); i != e; ++i) { + if (!Ints[i].GCCBuiltinName.empty()) { + // Get the map for this target prefix. + std::map<std::string, std::string> &BIM =BuiltinMap[Ints[i].TargetPrefix]; + + if (!BIM.insert(std::make_pair(Ints[i].GCCBuiltinName, + Ints[i].EnumName)).second) + PrintFatalError("Intrinsic '" + Ints[i].TheDef->getName() + + "': duplicate GCC builtin name!"); + } + } + + OS << "// Get the LLVM intrinsic that corresponds to a GCC builtin.\n"; + OS << "// This is used by the C front-end. The GCC builtin name is passed\n"; + 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"; + + if (TargetOnly) { + OS << "static " << TargetPrefix << "Intrinsic::ID " + << "getIntrinsicForGCCBuiltin(const char " + << "*TargetPrefixStr, const char *BuiltinNameStr) {\n"; + } else { + OS << "Intrinsic::ID Intrinsic::getIntrinsicForGCCBuiltin(const char " + << "*TargetPrefixStr, const char *BuiltinNameStr) {\n"; + } + + OS << " StringRef BuiltinName(BuiltinNameStr);\n"; + OS << " StringRef TargetPrefix(TargetPrefixStr);\n\n"; + + // Note: this could emit significantly better code if we cared. + for (BIMTy::iterator I = BuiltinMap.begin(), E = BuiltinMap.end();I != E;++I){ + OS << " "; + if (!I->first.empty()) + OS << "if (TargetPrefix == \"" << I->first << "\") "; + else + OS << "/* Target Independent Builtins */ "; + OS << "{\n"; + + // Emit the comparisons for this target prefix. + EmitTargetBuiltins(I->second, TargetPrefix, OS); + OS << " }\n"; + } + OS << " return "; + if (!TargetPrefix.empty()) + OS << "(" << TargetPrefix << "Intrinsic::ID)"; + OS << "Intrinsic::not_intrinsic;\n"; + OS << "}\n"; + OS << "#endif\n\n"; +} + +namespace llvm { + +void EmitIntrinsics(RecordKeeper &RK, raw_ostream &OS, bool TargetOnly = false) { + IntrinsicEmitter(RK, TargetOnly).run(OS); +} + +} // End llvm namespace |
