1 //===- IntrinsicEmitter.cpp - Generate intrinsic information --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by Chris Lattner and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This tablegen backend emits information about intrinsic functions.
12 //===----------------------------------------------------------------------===//
14 #include "IntrinsicEmitter.h"
16 #include "llvm/ADT/StringExtras.h"
20 //===----------------------------------------------------------------------===//
21 // CodeGenIntrinsic Implementation
22 //===----------------------------------------------------------------------===//
24 std::vector<CodeGenIntrinsic> llvm::LoadIntrinsics(const RecordKeeper &RC) {
25 std::vector<Record*> I = RC.getAllDerivedDefinitions("Intrinsic");
26 return std::vector<CodeGenIntrinsic>(I.begin(), I.end());
29 CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
30 std::string DefName = R->getName();
33 if (DefName.size() <= 4 ||
34 std::string(DefName.begin(), DefName.begin()+4) != "int_")
35 throw "Intrinsic '" + DefName + "' does not start with 'int_'!";
36 EnumName = std::string(DefName.begin()+4, DefName.end());
37 if (R->getValue("GCCBuiltinName")) // Ignore a missing GCCBuiltinName field.
38 GCCBuiltinName = R->getValueAsString("GCCBuiltinName");
39 TargetPrefix = R->getValueAsString("TargetPrefix");
40 Name = R->getValueAsString("LLVMName");
42 // If an explicit name isn't specified, derive one from the DefName.
44 for (unsigned i = 0, e = EnumName.size(); i != e; ++i)
45 if (EnumName[i] == '_')
50 // Verify it starts with "llvm.".
51 if (Name.size() <= 5 ||
52 std::string(Name.begin(), Name.begin()+5) != "llvm.")
53 throw "Intrinsic '" + DefName + "'s name does not start with 'llvm.'!";
56 // If TargetPrefix is specified, make sure that Name starts with
57 // "llvm.<targetprefix>.".
58 if (!TargetPrefix.empty()) {
59 if (Name.size() < 6+TargetPrefix.size() ||
60 std::string(Name.begin()+5, Name.begin()+6+TargetPrefix.size())
61 != (TargetPrefix+"."))
62 throw "Intrinsic '" + DefName + "' does not start with 'llvm." +
66 // Parse the list of argument types.
67 ListInit *TypeList = R->getValueAsListInit("Types");
68 for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
69 DefInit *DI = dynamic_cast<DefInit*>(TypeList->getElement(i));
70 assert(DI && "Invalid list type!");
71 Record *TyEl = DI->getDef();
72 assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
73 ArgTypes.push_back(TyEl->getValueAsString("TypeVal"));
74 ArgTypeDefs.push_back(TyEl);
76 if (ArgTypes.size() == 0)
77 throw "Intrinsic '"+DefName+"' needs at least a type for the ret value!";
79 // Parse the intrinsic properties.
80 ListInit *PropList = R->getValueAsListInit("Properties");
81 for (unsigned i = 0, e = PropList->getSize(); i != e; ++i) {
82 DefInit *DI = dynamic_cast<DefInit*>(PropList->getElement(i));
83 assert(DI && "Invalid list type!");
84 Record *Property = DI->getDef();
85 assert(Property->isSubClassOf("IntrinsicProperty") &&
86 "Expected a property!");
88 if (Property->getName() == "InstrNoMem")
90 else if (Property->getName() == "InstrReadArgMem")
92 else if (Property->getName() == "IntrReadMem")
94 else if (Property->getName() == "InstrWriteArgMem")
96 else if (Property->getName() == "IntrWriteMem")
99 assert(0 && "Unknown property!");
103 //===----------------------------------------------------------------------===//
104 // IntrinsicEmitter Implementation
105 //===----------------------------------------------------------------------===//
107 void IntrinsicEmitter::run(std::ostream &OS) {
108 EmitSourceFileHeader("Intrinsic Function Source Fragment", OS);
110 std::vector<CodeGenIntrinsic> Ints = LoadIntrinsics(Records);
112 // Emit the enum information.
113 EmitEnumInfo(Ints, OS);
115 // Emit the intrinsic ID -> name table.
116 EmitIntrinsicToNameTable(Ints, OS);
118 // Emit the function name recognizer.
119 EmitFnNameRecognizer(Ints, OS);
121 // Emit the intrinsic verifier.
122 EmitVerifier(Ints, OS);
124 // Emit mod/ref info for each function.
125 EmitModRefInfo(Ints, OS);
127 // Emit table of non-memory accessing intrinsics.
128 EmitNoMemoryInfo(Ints, OS);
130 // Emit side effect info for each intrinsic.
131 EmitSideEffectInfo(Ints, OS);
133 // Emit a list of intrinsics with corresponding GCC builtins.
134 EmitGCCBuiltinList(Ints, OS);
136 // Emit code to translate GCC builtins into LLVM intrinsics.
137 EmitIntrinsicToGCCBuiltinMap(Ints, OS);
140 void IntrinsicEmitter::EmitEnumInfo(const std::vector<CodeGenIntrinsic> &Ints,
142 OS << "// Enum values for Intrinsics.h\n";
143 OS << "#ifdef GET_INTRINSIC_ENUM_VALUES\n";
144 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
145 OS << " " << Ints[i].EnumName;
146 OS << ((i != e-1) ? ", " : " ");
147 OS << std::string(40-Ints[i].EnumName.size(), ' ')
148 << "// " << Ints[i].Name << "\n";
153 void IntrinsicEmitter::
154 EmitFnNameRecognizer(const std::vector<CodeGenIntrinsic> &Ints,
156 // Build a function name -> intrinsic name mapping.
157 std::map<std::string, std::string> IntMapping;
158 for (unsigned i = 0, e = Ints.size(); i != e; ++i)
159 IntMapping[Ints[i].Name] = Ints[i].EnumName;
161 OS << "// Function name -> enum value recognizer code.\n";
162 OS << "#ifdef GET_FUNCTION_RECOGNIZER\n";
163 OS << " switch (Name[5]) {\n";
164 OS << " default: break;\n";
165 // Emit the intrinsics in sorted order.
167 for (std::map<std::string, std::string>::iterator I = IntMapping.begin(),
168 E = IntMapping.end(); I != E; ++I) {
169 if (I->first[5] != LastChar) {
170 LastChar = I->first[5];
171 OS << " case '" << LastChar << "':\n";
174 OS << " if (Name == \"" << I->first << "\") return Intrinsic::"
175 << I->second << ";\n";
178 OS << " // The 'llvm.' namespace is reserved!\n";
179 OS << " assert(0 && \"Unknown LLVM intrinsic function!\");\n";
183 void IntrinsicEmitter::
184 EmitIntrinsicToNameTable(const std::vector<CodeGenIntrinsic> &Ints,
186 std::vector<std::string> Names;
187 for (unsigned i = 0, e = Ints.size(); i != e; ++i)
188 Names.push_back(Ints[i].Name);
189 std::sort(Names.begin(), Names.end());
191 OS << "// Intrinsic ID to name table\n";
192 OS << "#ifdef GET_INTRINSIC_NAME_TABLE\n";
193 OS << " // Note that entry #0 is the invalid intrinsic!\n";
194 for (unsigned i = 0, e = Names.size(); i != e; ++i)
195 OS << " \"" << Names[i] << "\",\n";
199 static void EmitTypeVerify(std::ostream &OS, const std::string &Val,
201 OS << " Assert1(" << Val << "->getTypeID() == "
202 << ArgType->getValueAsString("TypeVal") << ",\n"
203 << " \"Illegal intrinsic type!\", IF);\n";
205 // If this is a packed type, check that the subtype and size are correct.
206 if (ArgType->isSubClassOf("LLVMPackedType")) {
207 Record *SubType = ArgType->getValueAsDef("ElTy");
208 OS << " Assert1(cast<PackedType>(" << Val
209 << ")->getElementType()->getTypeID() == "
210 << SubType->getValueAsString("TypeVal") << ",\n"
211 << " \"Illegal intrinsic type!\", IF);\n";
212 OS << " Assert1(cast<PackedType>(" << Val << ")->getNumElements() == "
213 << ArgType->getValueAsInt("NumElts") << ",\n"
214 << " \"Illegal intrinsic type!\", IF);\n";
218 void IntrinsicEmitter::EmitVerifier(const std::vector<CodeGenIntrinsic> &Ints,
220 OS << "// Verifier::visitIntrinsicFunctionCall code.\n";
221 OS << "#ifdef GET_INTRINSIC_VERIFIER\n";
222 OS << " switch (ID) {\n";
223 OS << " default: assert(0 && \"Invalid intrinsic!\");\n";
224 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
225 OS << " case Intrinsic::" << Ints[i].EnumName << ":\t\t// "
226 << Ints[i].Name << "\n";
227 OS << " Assert1(FTy->getNumParams() == " << Ints[i].ArgTypes.size()-1
229 << " \"Illegal # arguments for intrinsic function!\", IF);\n";
230 EmitTypeVerify(OS, "FTy->getReturnType()", Ints[i].ArgTypeDefs[0]);
231 for (unsigned j = 1; j != Ints[i].ArgTypes.size(); ++j)
232 EmitTypeVerify(OS, "FTy->getParamType(" + utostr(j-1) + ")",
233 Ints[i].ArgTypeDefs[j]);
240 void IntrinsicEmitter::EmitModRefInfo(const std::vector<CodeGenIntrinsic> &Ints,
242 OS << "// BasicAliasAnalysis code.\n";
243 OS << "#ifdef GET_MODREF_BEHAVIOR\n";
244 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
245 switch (Ints[i].ModRef) {
247 case CodeGenIntrinsic::NoMem:
248 OS << " NoMemoryTable.push_back(\"" << Ints[i].Name << "\");\n";
250 case CodeGenIntrinsic::ReadArgMem:
251 case CodeGenIntrinsic::ReadMem:
252 OS << " OnlyReadsMemoryTable.push_back(\"" << Ints[i].Name << "\");\n";
259 void IntrinsicEmitter::
260 EmitNoMemoryInfo(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS) {
261 OS << "// SelectionDAGIsel code.\n";
262 OS << "#ifdef GET_NO_MEMORY_INTRINSICS\n";
263 OS << " switch (IntrinsicID) {\n";
264 OS << " default: break;\n";
265 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
266 switch (Ints[i].ModRef) {
268 case CodeGenIntrinsic::NoMem:
269 OS << " case Intrinsic::" << Ints[i].EnumName << ":\n";
273 OS << " return true; // These intrinsics have no side effects.\n";
278 void IntrinsicEmitter::
279 EmitSideEffectInfo(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
280 OS << "// isInstructionTriviallyDead code.\n";
281 OS << "#ifdef GET_SIDE_EFFECT_INFO\n";
282 OS << " switch (F->getIntrinsicID()) {\n";
283 OS << " default: break;\n";
284 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
285 switch (Ints[i].ModRef) {
287 case CodeGenIntrinsic::NoMem:
288 case CodeGenIntrinsic::ReadArgMem:
289 case CodeGenIntrinsic::ReadMem:
290 OS << " case Intrinsic::" << Ints[i].EnumName << ":\n";
294 OS << " return true; // These intrinsics have no side effects.\n";
299 void IntrinsicEmitter::
300 EmitGCCBuiltinList(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
301 OS << "// Get the GCC builtin that corresponds to an LLVM intrinsic.\n";
302 OS << "#ifdef GET_GCC_BUILTIN_NAME\n";
303 OS << " switch (F->getIntrinsicID()) {\n";
304 OS << " default: BuiltinName = \"\"; break;\n";
305 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
306 if (!Ints[i].GCCBuiltinName.empty()) {
307 OS << " case Intrinsic::" << Ints[i].EnumName << ": BuiltinName = \""
308 << Ints[i].GCCBuiltinName << "\"; break;\n";
315 void IntrinsicEmitter::
316 EmitIntrinsicToGCCBuiltinMap(const std::vector<CodeGenIntrinsic> &Ints,
318 typedef std::map<std::pair<std::string, std::string>, std::string> BIMTy;
320 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
321 if (!Ints[i].GCCBuiltinName.empty()) {
322 std::pair<std::string, std::string> Key(Ints[i].GCCBuiltinName,
323 Ints[i].TargetPrefix);
324 if (!BuiltinMap.insert(std::make_pair(Key, Ints[i].EnumName)).second)
325 throw "Intrinsic '" + Ints[i].TheDef->getName() +
326 "': duplicate GCC builtin name!";
330 OS << "// Get the LLVM intrinsic that corresponds to a GCC builtin.\n";
331 OS << "// This is used by the C front-end. The GCC builtin name is passed\n";
332 OS << "// in as BuiltinName, and a target prefix (e.g. 'ppc') is passed\n";
333 OS << "// in as TargetPrefix. The result is assigned to 'IntrinsicID'.\n";
334 OS << "#ifdef GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN\n";
336 // Note: this could emit significantly better code if we cared.
337 for (BIMTy::iterator I = BuiltinMap.begin(), E = BuiltinMap.end();I != E;++I){
339 if (!I->first.second.empty()) {
340 // Emit this as a strcmp, so it can be constant folded by the FE.
341 OS << "!strcmp(TargetPrefix, \"" << I->first.second << "\") &&\n"
344 OS << "!strcmp(BuiltinName, \"" << I->first.first << "\"))\n";
345 OS << " IntrinsicID = Intrinsic::" << I->second << ";\n";
348 OS << " IntrinsicID = Intrinsic::not_intrinsic;\n";