1 //===- IntrinsicEmitter.cpp - Generate intrinsic information --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This tablegen backend emits information about intrinsic functions.
12 //===----------------------------------------------------------------------===//
14 #include "CodeGenTarget.h"
15 #include "IntrinsicEmitter.h"
17 #include "llvm/ADT/StringExtras.h"
21 //===----------------------------------------------------------------------===//
22 // IntrinsicEmitter Implementation
23 //===----------------------------------------------------------------------===//
25 void IntrinsicEmitter::run(std::ostream &OS) {
26 EmitSourceFileHeader("Intrinsic Function Source Fragment", OS);
28 std::vector<CodeGenIntrinsic> Ints = LoadIntrinsics(Records);
30 // Emit the enum information.
31 EmitEnumInfo(Ints, OS);
33 // Emit the intrinsic ID -> name table.
34 EmitIntrinsicToNameTable(Ints, OS);
36 // Emit the function name recognizer.
37 EmitFnNameRecognizer(Ints, OS);
39 // Emit the intrinsic verifier.
40 EmitVerifier(Ints, OS);
42 // Emit the intrinsic declaration generator.
43 EmitGenerator(Ints, OS);
45 // Emit the intrinsic parameter attributes.
46 EmitAttributes(Ints, OS);
48 // Emit a list of intrinsics with corresponding GCC builtins.
49 EmitGCCBuiltinList(Ints, OS);
51 // Emit code to translate GCC builtins into LLVM intrinsics.
52 EmitIntrinsicToGCCBuiltinMap(Ints, OS);
55 void IntrinsicEmitter::EmitEnumInfo(const std::vector<CodeGenIntrinsic> &Ints,
57 OS << "// Enum values for Intrinsics.h\n";
58 OS << "#ifdef GET_INTRINSIC_ENUM_VALUES\n";
59 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
60 OS << " " << Ints[i].EnumName;
61 OS << ((i != e-1) ? ", " : " ");
62 OS << std::string(40-Ints[i].EnumName.size(), ' ')
63 << "// " << Ints[i].Name << "\n";
68 void IntrinsicEmitter::
69 EmitFnNameRecognizer(const std::vector<CodeGenIntrinsic> &Ints,
71 // Build a function name -> intrinsic name mapping.
72 std::map<std::string, unsigned> IntMapping;
73 for (unsigned i = 0, e = Ints.size(); i != e; ++i)
74 IntMapping[Ints[i].Name] = i;
76 OS << "// Function name -> enum value recognizer code.\n";
77 OS << "#ifdef GET_FUNCTION_RECOGNIZER\n";
78 OS << " switch (Name[5]) {\n";
80 // Emit the intrinsics in sorted order.
82 for (std::map<std::string, unsigned>::iterator I = IntMapping.begin(),
83 E = IntMapping.end(); I != E; ++I) {
84 if (I->first[5] != LastChar) {
85 LastChar = I->first[5];
87 OS << " case '" << LastChar << "':\n";
90 // For overloaded intrinsics, only the prefix needs to match
91 if (Ints[I->second].isOverloaded)
92 OS << " if (Len > " << I->first.size()
93 << " && !memcmp(Name, \"" << I->first << ".\", "
94 << (I->first.size() + 1) << ")) return Intrinsic::"
95 << Ints[I->second].EnumName << ";\n";
97 OS << " if (Len == " << I->first.size()
98 << " && !memcmp(Name, \"" << I->first << "\", "
99 << I->first.size() << ")) return Intrinsic::"
100 << Ints[I->second].EnumName << ";\n";
106 void IntrinsicEmitter::
107 EmitIntrinsicToNameTable(const std::vector<CodeGenIntrinsic> &Ints,
109 OS << "// Intrinsic ID to name table\n";
110 OS << "#ifdef GET_INTRINSIC_NAME_TABLE\n";
111 OS << " // Note that entry #0 is the invalid intrinsic!\n";
112 for (unsigned i = 0, e = Ints.size(); i != e; ++i)
113 OS << " \"" << Ints[i].Name << "\",\n";
117 static void EmitTypeForValueType(std::ostream &OS, MVT::ValueType VT) {
118 if (MVT::isInteger(VT)) {
119 unsigned BitWidth = MVT::getSizeInBits(VT);
120 OS << "IntegerType::get(" << BitWidth << ")";
121 } else if (VT == MVT::Other) {
122 // MVT::OtherVT is used to mean the empty struct type here.
123 OS << "StructType::get(std::vector<const Type *>())";
124 } else if (VT == MVT::f32) {
125 OS << "Type::FloatTy";
126 } else if (VT == MVT::f64) {
127 OS << "Type::DoubleTy";
128 } else if (VT == MVT::f80) {
129 OS << "Type::X86_FP80Ty";
130 } else if (VT == MVT::f128) {
131 OS << "Type::FP128Ty";
132 } else if (VT == MVT::ppcf128) {
133 OS << "Type::PPC_FP128Ty";
134 } else if (VT == MVT::isVoid) {
135 OS << "Type::VoidTy";
137 assert(false && "Unsupported ValueType!");
141 static void EmitTypeGenerate(std::ostream &OS, Record *ArgType,
143 MVT::ValueType VT = getValueType(ArgType->getValueAsDef("VT"));
145 if (ArgType->isSubClassOf("LLVMMatchType")) {
146 unsigned Number = ArgType->getValueAsInt("Number");
147 assert(Number < ArgNo && "Invalid matching number!");
148 OS << "Tys[" << Number << "]";
149 } else if (VT == MVT::iAny || VT == MVT::fAny) {
150 // NOTE: The ArgNo variable here is not the absolute argument number, it is
151 // the index of the "arbitrary" type in the Tys array passed to the
152 // Intrinsic::getDeclaration function. Consequently, we only want to
153 // increment it when we actually hit an overloaded type. Getting this wrong
154 // leads to very subtle bugs!
155 OS << "Tys[" << ArgNo++ << "]";
156 } else if (MVT::isVector(VT)) {
157 OS << "VectorType::get(";
158 EmitTypeForValueType(OS, MVT::getVectorElementType(VT));
159 OS << ", " << MVT::getVectorNumElements(VT) << ")";
160 } else if (VT == MVT::iPTR) {
161 OS << "PointerType::getUnqual(";
162 EmitTypeGenerate(OS, ArgType->getValueAsDef("ElTy"), ArgNo);
164 } else if (VT == MVT::isVoid) {
166 OS << "Type::VoidTy";
168 // MVT::isVoid is used to mean varargs here.
171 EmitTypeForValueType(OS, VT);
175 /// RecordListComparator - Provide a determinstic comparator for lists of
178 struct RecordListComparator {
179 bool operator()(const std::vector<Record*> &LHS,
180 const std::vector<Record*> &RHS) const {
183 if (i == RHS.size()) return false; // RHS is shorter than LHS.
184 if (LHS[i] != RHS[i])
185 return LHS[i]->getName() < RHS[i]->getName();
186 } while (++i != LHS.size());
188 return i != RHS.size();
193 void IntrinsicEmitter::EmitVerifier(const std::vector<CodeGenIntrinsic> &Ints,
195 OS << "// Verifier::visitIntrinsicFunctionCall code.\n";
196 OS << "#ifdef GET_INTRINSIC_VERIFIER\n";
197 OS << " switch (ID) {\n";
198 OS << " default: assert(0 && \"Invalid intrinsic!\");\n";
200 // This checking can emit a lot of very common code. To reduce the amount of
201 // code that we emit, batch up cases that have identical types. This avoids
202 // problems where GCC can run out of memory compiling Verifier.cpp.
203 typedef std::map<std::vector<Record*>, std::vector<unsigned>,
204 RecordListComparator> MapTy;
205 MapTy UniqueArgInfos;
207 // Compute the unique argument type info.
208 for (unsigned i = 0, e = Ints.size(); i != e; ++i)
209 UniqueArgInfos[Ints[i].ArgTypeDefs].push_back(i);
211 // Loop through the array, emitting one comparison for each batch.
212 for (MapTy::iterator I = UniqueArgInfos.begin(),
213 E = UniqueArgInfos.end(); I != E; ++I) {
214 for (unsigned i = 0, e = I->second.size(); i != e; ++i) {
215 OS << " case Intrinsic::" << Ints[I->second[i]].EnumName << ":\t\t// "
216 << Ints[I->second[i]].Name << "\n";
219 const std::vector<Record*> &ArgTypes = I->first;
220 OS << " VerifyIntrinsicPrototype(ID, IF, " << ArgTypes.size() << ", ";
221 for (unsigned j = 0; j != ArgTypes.size(); ++j) {
222 Record *ArgType = ArgTypes[j];
223 if (ArgType->isSubClassOf("LLVMMatchType")) {
224 unsigned Number = ArgType->getValueAsInt("Number");
225 assert(Number < j && "Invalid matching number!");
228 MVT::ValueType VT = getValueType(ArgType->getValueAsDef("VT"));
229 OS << getEnumName(VT);
230 if (VT == MVT::isVoid && j != 0 && j != ArgTypes.size()-1)
231 throw "Var arg type not last argument";
233 if (j != ArgTypes.size()-1)
244 void IntrinsicEmitter::EmitGenerator(const std::vector<CodeGenIntrinsic> &Ints,
246 OS << "// Code for generating Intrinsic function declarations.\n";
247 OS << "#ifdef GET_INTRINSIC_GENERATOR\n";
248 OS << " switch (id) {\n";
249 OS << " default: assert(0 && \"Invalid intrinsic!\");\n";
251 // Similar to GET_INTRINSIC_VERIFIER, batch up cases that have identical
253 typedef std::map<std::vector<Record*>, std::vector<unsigned>,
254 RecordListComparator> MapTy;
255 MapTy UniqueArgInfos;
257 // Compute the unique argument type info.
258 for (unsigned i = 0, e = Ints.size(); i != e; ++i)
259 UniqueArgInfos[Ints[i].ArgTypeDefs].push_back(i);
261 // Loop through the array, emitting one generator for each batch.
262 for (MapTy::iterator I = UniqueArgInfos.begin(),
263 E = UniqueArgInfos.end(); I != E; ++I) {
264 for (unsigned i = 0, e = I->second.size(); i != e; ++i) {
265 OS << " case Intrinsic::" << Ints[I->second[i]].EnumName << ":\t\t// "
266 << Ints[I->second[i]].Name << "\n";
269 const std::vector<Record*> &ArgTypes = I->first;
270 unsigned N = ArgTypes.size();
273 getValueType(ArgTypes[N-1]->getValueAsDef("VT")) == MVT::isVoid) {
274 OS << " IsVarArg = true;\n";
279 OS << " ResultTy = ";
280 EmitTypeGenerate(OS, ArgTypes[0], ArgNo);
283 for (unsigned j = 1; j != N; ++j) {
284 OS << " ArgTys.push_back(";
285 EmitTypeGenerate(OS, ArgTypes[j], ArgNo);
294 void IntrinsicEmitter::
295 EmitAttributes(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS) {
296 OS << "// Add parameter attributes that are not common to all intrinsics.\n";
297 OS << "#ifdef GET_INTRINSIC_ATTRIBUTES\n";
298 OS << " switch (id) {\n";
299 OS << " default: break;\n";
300 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
301 switch (Ints[i].ModRef) {
303 case CodeGenIntrinsic::NoMem:
304 OS << " case Intrinsic::" << Ints[i].EnumName << ":\n";
308 OS << " Attr |= ParamAttr::ReadNone; // These do not access memory.\n";
310 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
311 switch (Ints[i].ModRef) {
313 case CodeGenIntrinsic::ReadArgMem:
314 case CodeGenIntrinsic::ReadMem:
315 OS << " case Intrinsic::" << Ints[i].EnumName << ":\n";
319 OS << " Attr |= ParamAttr::ReadOnly; // These do not write memory.\n";
325 void IntrinsicEmitter::
326 EmitGCCBuiltinList(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
327 OS << "// Get the GCC builtin that corresponds to an LLVM intrinsic.\n";
328 OS << "#ifdef GET_GCC_BUILTIN_NAME\n";
329 OS << " switch (F->getIntrinsicID()) {\n";
330 OS << " default: BuiltinName = \"\"; break;\n";
331 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
332 if (!Ints[i].GCCBuiltinName.empty()) {
333 OS << " case Intrinsic::" << Ints[i].EnumName << ": BuiltinName = \""
334 << Ints[i].GCCBuiltinName << "\"; break;\n";
341 /// EmitBuiltinComparisons - Emit comparisons to determine whether the specified
342 /// sorted range of builtin names is equal to the current builtin. This breaks
343 /// it down into a simple tree.
345 /// At this point, we know that all the builtins in the range have the same name
346 /// for the first 'CharStart' characters. Only the end of the name needs to be
348 typedef std::map<std::string, std::string>::const_iterator StrMapIterator;
349 static void EmitBuiltinComparisons(StrMapIterator Start, StrMapIterator End,
350 unsigned CharStart, unsigned Indent,
352 if (Start == End) return; // empty range.
354 // Determine what, if anything, is the same about all these strings.
355 std::string CommonString = Start->first;
356 unsigned NumInRange = 0;
357 for (StrMapIterator I = Start; I != End; ++I, ++NumInRange) {
358 // Find the first character that doesn't match.
359 const std::string &ThisStr = I->first;
360 unsigned NonMatchChar = CharStart;
361 while (NonMatchChar < CommonString.size() &&
362 NonMatchChar < ThisStr.size() &&
363 CommonString[NonMatchChar] == ThisStr[NonMatchChar])
365 // Truncate off pieces that don't match.
366 CommonString.resize(NonMatchChar);
369 // Just compare the rest of the string.
370 if (NumInRange == 1) {
371 if (CharStart != CommonString.size()) {
372 OS << std::string(Indent*2, ' ') << "if (!memcmp(BuiltinName";
373 if (CharStart) OS << "+" << CharStart;
374 OS << ", \"" << (CommonString.c_str()+CharStart) << "\", ";
375 OS << CommonString.size() - CharStart << "))\n";
378 OS << std::string(Indent*2, ' ') << "IntrinsicID = Intrinsic::";
379 OS << Start->second << ";\n";
383 // At this point, we potentially have a common prefix for these builtins, emit
384 // a check for this common prefix.
385 if (CommonString.size() != CharStart) {
386 OS << std::string(Indent*2, ' ') << "if (!memcmp(BuiltinName";
387 if (CharStart) OS << "+" << CharStart;
388 OS << ", \"" << (CommonString.c_str()+CharStart) << "\", ";
389 OS << CommonString.size()-CharStart << ")) {\n";
391 EmitBuiltinComparisons(Start, End, CommonString.size(), Indent+1, OS);
392 OS << std::string(Indent*2, ' ') << "}\n";
396 // Output a switch on the character that differs across the set.
397 OS << std::string(Indent*2, ' ') << "switch (BuiltinName[" << CharStart
400 OS << " // \"" << std::string(Start->first.begin(),
401 Start->first.begin()+CharStart) << "\"";
404 for (StrMapIterator I = Start; I != End; ) {
405 char ThisChar = I->first[CharStart];
406 OS << std::string(Indent*2, ' ') << "case '" << ThisChar << "':\n";
407 // Figure out the range that has this common character.
408 StrMapIterator NextChar = I;
409 for (++NextChar; NextChar != End && NextChar->first[CharStart] == ThisChar;
412 EmitBuiltinComparisons(I, NextChar, CharStart+1, Indent+1, OS);
413 OS << std::string(Indent*2, ' ') << " break;\n";
416 OS << std::string(Indent*2, ' ') << "}\n";
419 /// EmitTargetBuiltins - All of the builtins in the specified map are for the
420 /// same target, and we already checked it.
421 static void EmitTargetBuiltins(const std::map<std::string, std::string> &BIM,
423 // Rearrange the builtins by length.
424 std::vector<std::map<std::string, std::string> > BuiltinsByLen;
425 BuiltinsByLen.reserve(100);
427 for (StrMapIterator I = BIM.begin(), E = BIM.end(); I != E; ++I) {
428 if (I->first.size() >= BuiltinsByLen.size())
429 BuiltinsByLen.resize(I->first.size()+1);
430 BuiltinsByLen[I->first.size()].insert(*I);
433 // Now that we have all the builtins by their length, emit a switch stmt.
434 OS << " switch (strlen(BuiltinName)) {\n";
435 OS << " default: break;\n";
436 for (unsigned i = 0, e = BuiltinsByLen.size(); i != e; ++i) {
437 if (BuiltinsByLen[i].empty()) continue;
438 OS << " case " << i << ":\n";
439 EmitBuiltinComparisons(BuiltinsByLen[i].begin(), BuiltinsByLen[i].end(),
447 void IntrinsicEmitter::
448 EmitIntrinsicToGCCBuiltinMap(const std::vector<CodeGenIntrinsic> &Ints,
450 typedef std::map<std::string, std::map<std::string, std::string> > BIMTy;
452 for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
453 if (!Ints[i].GCCBuiltinName.empty()) {
454 // Get the map for this target prefix.
455 std::map<std::string, std::string> &BIM =BuiltinMap[Ints[i].TargetPrefix];
457 if (!BIM.insert(std::make_pair(Ints[i].GCCBuiltinName,
458 Ints[i].EnumName)).second)
459 throw "Intrinsic '" + Ints[i].TheDef->getName() +
460 "': duplicate GCC builtin name!";
464 OS << "// Get the LLVM intrinsic that corresponds to a GCC builtin.\n";
465 OS << "// This is used by the C front-end. The GCC builtin name is passed\n";
466 OS << "// in as BuiltinName, and a target prefix (e.g. 'ppc') is passed\n";
467 OS << "// in as TargetPrefix. The result is assigned to 'IntrinsicID'.\n";
468 OS << "#ifdef GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN\n";
469 OS << " IntrinsicID = Intrinsic::not_intrinsic;\n";
471 // Note: this could emit significantly better code if we cared.
472 for (BIMTy::iterator I = BuiltinMap.begin(), E = BuiltinMap.end();I != E;++I){
474 if (!I->first.empty())
475 OS << "if (!strcmp(TargetPrefix, \"" << I->first << "\")) ";
477 OS << "/* Target Independent Builtins */ ";
480 // Emit the comparisons for this target prefix.
481 EmitTargetBuiltins(I->second, OS);