//
// 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.
//
//===----------------------------------------------------------------------===//
//
//
//===----------------------------------------------------------------------===//
+#include "CodeGenTarget.h"
#include "IntrinsicEmitter.h"
#include "Record.h"
+#include "llvm/ADT/StringExtras.h"
+#include <algorithm>
using namespace llvm;
-//===----------------------------------------------------------------------===//
-// CodeGenIntrinsic Implementation
-//===----------------------------------------------------------------------===//
-
-std::vector<CodeGenIntrinsic> llvm::LoadIntrinsics(const RecordKeeper &RC) {
- std::vector<Record*> I = RC.getAllDerivedDefinitions("Intrinsic");
- return std::vector<CodeGenIntrinsic>(I.begin(), I.end());
-}
-
-CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
- std::string DefName = R->getName();
-
- 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());
-
- 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];
- }
-}
-
//===----------------------------------------------------------------------===//
// IntrinsicEmitter Implementation
//===----------------------------------------------------------------------===//
// Emit the enum information.
EmitEnumInfo(Ints, OS);
+
+ // Emit the intrinsic ID -> name table.
+ EmitIntrinsicToNameTable(Ints, OS);
+
+ // Emit the function name recognizer.
+ EmitFnNameRecognizer(Ints, OS);
+
+ // Emit the intrinsic verifier.
+ EmitVerifier(Ints, OS);
+
+ // Emit the intrinsic declaration generator.
+ EmitGenerator(Ints, OS);
+
+ // Emit the intrinsic parameter attributes.
+ EmitAttributes(Ints, OS);
+
+ // Emit a list of intrinsics with corresponding GCC builtins.
+ EmitGCCBuiltinList(Ints, OS);
+
+ // Emit code to translate GCC builtins into LLVM intrinsics.
+ EmitIntrinsicToGCCBuiltinMap(Ints, OS);
}
void IntrinsicEmitter::EmitEnumInfo(const std::vector<CodeGenIntrinsic> &Ints,
std::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 << "#endif\n\n";
}
+
+void IntrinsicEmitter::
+EmitFnNameRecognizer(const std::vector<CodeGenIntrinsic> &Ints,
+ std::ostream &OS) {
+ // Build a function name -> intrinsic name mapping.
+ std::map<std::string, unsigned> IntMapping;
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i)
+ 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:\n";
+ // Emit the intrinsics in sorted order.
+ char LastChar = 0;
+ for (std::map<std::string, unsigned>::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";
+ }
+
+ // 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 << "#endif\n\n";
+}
+
+void IntrinsicEmitter::
+EmitIntrinsicToNameTable(const std::vector<CodeGenIntrinsic> &Ints,
+ std::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";
+}
+
+static void EmitTypeForValueType(std::ostream &OS, MVT::ValueType VT) {
+ if (MVT::isInteger(VT)) {
+ unsigned BitWidth = MVT::getSizeInBits(VT);
+ 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<const Type *>())";
+ } 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, Record *ArgType,
+ unsigned &ArgNo) {
+ MVT::ValueType VT = getValueType(ArgType->getValueAsDef("VT"));
+
+ if (ArgType->isSubClassOf("LLVMMatchType")) {
+ unsigned Number = ArgType->getValueAsInt("Number");
+ assert(Number < ArgNo && "Invalid matching number!");
+ 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::isVector(VT)) {
+ OS << "VectorType::get(";
+ EmitTypeForValueType(OS, MVT::getVectorElementType(VT));
+ OS << ", " << MVT::getVectorNumElements(VT) << ")";
+ } else if (VT == MVT::iPTR) {
+ OS << "PointerType::getUnqual(";
+ EmitTypeGenerate(OS, ArgType->getValueAsDef("ElTy"), ArgNo);
+ OS << ")";
+ } 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 {
+ struct RecordListComparator {
+ bool operator()(const std::vector<Record*> &LHS,
+ const std::vector<Record*> &RHS) const {
+ unsigned i = 0;
+ do {
+ if (i == RHS.size()) return false; // RHS is shorter than LHS.
+ if (LHS[i] != RHS[i])
+ return LHS[i]->getName() < RHS[i]->getName();
+ } while (++i != LHS.size());
+
+ return i != RHS.size();
+ }
+ };
+}
+
+void IntrinsicEmitter::EmitVerifier(const std::vector<CodeGenIntrinsic> &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";
+
+ // 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<std::vector<Record*>, std::vector<unsigned>,
+ RecordListComparator> MapTy;
+ MapTy UniqueArgInfos;
+
+ // Compute the unique argument type info.
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i)
+ UniqueArgInfos[Ints[i].ArgTypeDefs].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 std::vector<Record*> &ArgTypes = I->first;
+ OS << " VerifyIntrinsicPrototype(ID, IF, " << ArgTypes.size() << ", ";
+ for (unsigned j = 0; j != ArgTypes.size(); ++j) {
+ Record *ArgType = ArgTypes[j];
+ if (ArgType->isSubClassOf("LLVMMatchType")) {
+ unsigned Number = ArgType->getValueAsInt("Number");
+ assert(Number < j && "Invalid matching number!");
+ OS << "~" << Number;
+ } else {
+ MVT::ValueType 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";
+ }
+ if (j != ArgTypes.size()-1)
+ OS << ", ";
+ }
+
+ OS << ");\n";
+ OS << " break;\n";
+ }
+ OS << " }\n";
+ OS << "#endif\n\n";
+}
+
+void IntrinsicEmitter::EmitGenerator(const std::vector<CodeGenIntrinsic> &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<std::vector<Record*>, std::vector<unsigned>,
+ RecordListComparator> MapTy;
+ MapTy UniqueArgInfos;
+
+ // Compute the unique argument type info.
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i)
+ UniqueArgInfos[Ints[i].ArgTypeDefs].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 std::vector<Record*> &ArgTypes = I->first;
+ unsigned N = ArgTypes.size();
+
+ if (N > 1 &&
+ getValueType(ArgTypes[N-1]->getValueAsDef("VT")) == MVT::isVoid) {
+ OS << " IsVarArg = true;\n";
+ --N;
+ }
+
+ unsigned ArgNo = 0;
+ OS << " ResultTy = ";
+ EmitTypeGenerate(OS, ArgTypes[0], ArgNo);
+ OS << ";\n";
+
+ for (unsigned j = 1; j != N; ++j) {
+ OS << " ArgTys.push_back(";
+ EmitTypeGenerate(OS, ArgTypes[j], ArgNo);
+ OS << ");\n";
+ }
+ OS << " break;\n";
+ }
+ OS << " }\n";
+ OS << "#endif\n\n";
+}
+
+void IntrinsicEmitter::
+EmitAttributes(const std::vector<CodeGenIntrinsic> &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 |= ParamAttr::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 << " Attr |= ParamAttr::ReadOnly; // These do not write memory.\n";
+ OS << " break;\n";
+ OS << " }\n";
+ OS << "#endif\n\n";
+}
+
+void IntrinsicEmitter::
+EmitGCCBuiltinList(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
+ OS << "// Get the GCC builtin that corresponds to an LLVM intrinsic.\n";
+ OS << "#ifdef GET_GCC_BUILTIN_NAME\n";
+ OS << " switch (F->getIntrinsicID()) {\n";
+ OS << " default: BuiltinName = \"\"; break;\n";
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
+ if (!Ints[i].GCCBuiltinName.empty()) {
+ OS << " case Intrinsic::" << Ints[i].EnumName << ": BuiltinName = \""
+ << Ints[i].GCCBuiltinName << "\"; break;\n";
+ }
+ }
+ OS << " }\n";
+ 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<std::string, std::string>::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<std::string, std::string> &BIM,
+ std::ostream &OS) {
+ // Rearrange the builtins by length.
+ std::vector<std::map<std::string, std::string> > 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<CodeGenIntrinsic> &Ints,
+ std::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)
+ throw "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";
+ 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 << " ";
+ 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 << "#endif\n\n";
+}
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