X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=utils%2FTableGen%2FIntrinsicEmitter.cpp;h=ab7b58b8ba3cdffef05f45ad04b35efeacdd3b83;hb=4c8c83022b501759d8559e224c84ae2a9921ba41;hp=3ac8db1c7772390a4f0a5795a2aaccb9d6f8aadd;hpb=f840f87baf1bad29e105354fdde51a128e7b1cd7;p=oota-llvm.git diff --git a/utils/TableGen/IntrinsicEmitter.cpp b/utils/TableGen/IntrinsicEmitter.cpp index 3ac8db1c777..ab7b58b8ba3 100644 --- a/utils/TableGen/IntrinsicEmitter.cpp +++ b/utils/TableGen/IntrinsicEmitter.cpp @@ -114,9 +114,9 @@ EmitIntrinsicToNameTable(const std::vector &Ints, OS << "#endif\n\n"; } -static void EmitTypeForValueType(std::ostream &OS, MVT::ValueType VT) { - if (MVT::isInteger(VT)) { - unsigned BitWidth = MVT::getSizeInBits(VT); +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. @@ -140,7 +140,7 @@ static void EmitTypeForValueType(std::ostream &OS, MVT::ValueType VT) { static void EmitTypeGenerate(std::ostream &OS, Record *ArgType, unsigned &ArgNo) { - MVT::ValueType VT = getValueType(ArgType->getValueAsDef("VT")); + MVT::SimpleValueType VT = getValueType(ArgType->getValueAsDef("VT")); if (ArgType->isSubClassOf("LLVMMatchType")) { unsigned Number = ArgType->getValueAsInt("Number"); @@ -153,10 +153,11 @@ static void EmitTypeGenerate(std::ostream &OS, Record *ArgType, // increment it when we actually hit an overloaded type. Getting this wrong // leads to very subtle bugs! OS << "Tys[" << ArgNo++ << "]"; - } else if (MVT::isVector(VT)) { + } else if (MVT(VT).isVector()) { + MVT VVT = VT; OS << "VectorType::get("; - EmitTypeForValueType(OS, MVT::getVectorElementType(VT)); - OS << ", " << MVT::getVectorNumElements(VT) << ")"; + EmitTypeForValueType(OS, VVT.getVectorElementType().getSimpleVT()); + OS << ", " << VVT.getVectorNumElements() << ")"; } else if (VT == MVT::iPTR) { OS << "PointerType::getUnqual("; EmitTypeGenerate(OS, ArgType->getValueAsDef("ElTy"), ArgNo); @@ -225,7 +226,7 @@ void IntrinsicEmitter::EmitVerifier(const std::vector &Ints, assert(Number < j && "Invalid matching number!"); OS << "~" << Number; } else { - MVT::ValueType VT = getValueType(ArgType->getValueAsDef("VT")); + MVT::SimpleValueType VT = getValueType(ArgType->getValueAsDef("VT")); OS << getEnumName(VT); if (VT == MVT::isVoid && j != 0 && j != ArgTypes.size()-1) throw "Var arg type not last argument"; @@ -338,6 +339,112 @@ 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) { @@ -360,6 +467,7 @@ 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 << " 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){ @@ -370,15 +478,8 @@ EmitIntrinsicToGCCBuiltinMap(const std::vector &Ints, OS << "/* Target Independent Builtins */ "; OS << "{\n"; - OS << " if (0);\n"; - // Emit the comparisons for this target prefix. - std::map &BIM = I->second; - for (std::map::iterator J = BIM.begin(), - E = BIM.end(); J != E; ++J) { - OS << " else if (!strcmp(BuiltinName, \"" << J->first << "\"))\n"; - OS << " IntrinsicID = Intrinsic::" << J->second << ";\n"; - } + EmitTargetBuiltins(I->second, OS); OS << " }\n"; } OS << "#endif\n\n";