1//===- IntrinsicEmitter.cpp - Generate intrinsic information --------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This tablegen backend emits information about intrinsic functions.
11//
12//===----------------------------------------------------------------------===//
13
14#include "CodeGenTarget.h"
15#include "IntrinsicEmitter.h"
16#include "StringMatcher.h"
17#include "llvm/TableGen/Record.h"
18#include "llvm/ADT/StringExtras.h"
19#include <algorithm>
20using namespace llvm;
21
22//===----------------------------------------------------------------------===//
23// IntrinsicEmitter Implementation
24//===----------------------------------------------------------------------===//
25
26void IntrinsicEmitter::run(raw_ostream &OS) {
27  EmitSourceFileHeader("Intrinsic Function Source Fragment", OS);
28
29  std::vector<CodeGenIntrinsic> Ints = LoadIntrinsics(Records, TargetOnly);
30
31  if (TargetOnly && !Ints.empty())
32    TargetPrefix = Ints[0].TargetPrefix;
33
34  EmitPrefix(OS);
35
36  // Emit the enum information.
37  EmitEnumInfo(Ints, OS);
38
39  // Emit the intrinsic ID -> name table.
40  EmitIntrinsicToNameTable(Ints, OS);
41
42  // Emit the intrinsic ID -> overload table.
43  EmitIntrinsicToOverloadTable(Ints, OS);
44
45  // Emit the function name recognizer.
46  EmitFnNameRecognizer(Ints, OS);
47
48  // Emit the intrinsic verifier.
49  EmitVerifier(Ints, OS);
50
51  // Emit the intrinsic declaration generator.
52  EmitGenerator(Ints, OS);
53
54  // Emit the intrinsic parameter attributes.
55  EmitAttributes(Ints, OS);
56
57  // Emit intrinsic alias analysis mod/ref behavior.
58  EmitModRefBehavior(Ints, OS);
59
60  // Emit a list of intrinsics with corresponding GCC builtins.
61  EmitGCCBuiltinList(Ints, OS);
62
63  // Emit code to translate GCC builtins into LLVM intrinsics.
64  EmitIntrinsicToGCCBuiltinMap(Ints, OS);
65
66  EmitSuffix(OS);
67}
68
69void IntrinsicEmitter::EmitPrefix(raw_ostream &OS) {
70  OS << "// VisualStudio defines setjmp as _setjmp\n"
71        "#if defined(_MSC_VER) && defined(setjmp) && \\\n"
72        "                         !defined(setjmp_undefined_for_msvc)\n"
73        "#  pragma push_macro(\"setjmp\")\n"
74        "#  undef setjmp\n"
75        "#  define setjmp_undefined_for_msvc\n"
76        "#endif\n\n";
77}
78
79void IntrinsicEmitter::EmitSuffix(raw_ostream &OS) {
80  OS << "#if defined(_MSC_VER) && defined(setjmp_undefined_for_msvc)\n"
81        "// let's return it to _setjmp state\n"
82        "#  pragma pop_macro(\"setjmp\")\n"
83        "#  undef setjmp_undefined_for_msvc\n"
84        "#endif\n\n";
85}
86
87void IntrinsicEmitter::EmitEnumInfo(const std::vector<CodeGenIntrinsic> &Ints,
88                                    raw_ostream &OS) {
89  OS << "// Enum values for Intrinsics.h\n";
90  OS << "#ifdef GET_INTRINSIC_ENUM_VALUES\n";
91  for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
92    OS << "    " << Ints[i].EnumName;
93    OS << ((i != e-1) ? ", " : "  ");
94    OS << std::string(40-Ints[i].EnumName.size(), ' ')
95      << "// " << Ints[i].Name << "\n";
96  }
97  OS << "#endif\n\n";
98}
99
100void IntrinsicEmitter::
101EmitFnNameRecognizer(const std::vector<CodeGenIntrinsic> &Ints,
102                     raw_ostream &OS) {
103  // Build a 'first character of function name' -> intrinsic # mapping.
104  std::map<char, std::vector<unsigned> > IntMapping;
105  for (unsigned i = 0, e = Ints.size(); i != e; ++i)
106    IntMapping[Ints[i].Name[5]].push_back(i);
107
108  OS << "// Function name -> enum value recognizer code.\n";
109  OS << "#ifdef GET_FUNCTION_RECOGNIZER\n";
110  OS << "  StringRef NameR(Name+6, Len-6);   // Skip over 'llvm.'\n";
111  OS << "  switch (Name[5]) {                  // Dispatch on first letter.\n";
112  OS << "  default: break;\n";
113  // Emit the intrinsic matching stuff by first letter.
114  for (std::map<char, std::vector<unsigned> >::iterator I = IntMapping.begin(),
115       E = IntMapping.end(); I != E; ++I) {
116    OS << "  case '" << I->first << "':\n";
117    std::vector<unsigned> &IntList = I->second;
118
119    // Emit all the overloaded intrinsics first, build a table of the
120    // non-overloaded ones.
121    std::vector<StringMatcher::StringPair> MatchTable;
122
123    for (unsigned i = 0, e = IntList.size(); i != e; ++i) {
124      unsigned IntNo = IntList[i];
125      std::string Result = "return " + TargetPrefix + "Intrinsic::" +
126        Ints[IntNo].EnumName + ";";
127
128      if (!Ints[IntNo].isOverloaded) {
129        MatchTable.push_back(std::make_pair(Ints[IntNo].Name.substr(6),Result));
130        continue;
131      }
132
133      // For overloaded intrinsics, only the prefix needs to match
134      std::string TheStr = Ints[IntNo].Name.substr(6);
135      TheStr += '.';  // Require "bswap." instead of bswap.
136      OS << "    if (NameR.startswith(\"" << TheStr << "\")) "
137         << Result << '\n';
138    }
139
140    // Emit the matcher logic for the fixed length strings.
141    StringMatcher("NameR", MatchTable, OS).Emit(1);
142    OS << "    break;  // end of '" << I->first << "' case.\n";
143  }
144
145  OS << "  }\n";
146  OS << "#endif\n\n";
147}
148
149void IntrinsicEmitter::
150EmitIntrinsicToNameTable(const std::vector<CodeGenIntrinsic> &Ints,
151                         raw_ostream &OS) {
152  OS << "// Intrinsic ID to name table\n";
153  OS << "#ifdef GET_INTRINSIC_NAME_TABLE\n";
154  OS << "  // Note that entry #0 is the invalid intrinsic!\n";
155  for (unsigned i = 0, e = Ints.size(); i != e; ++i)
156    OS << "  \"" << Ints[i].Name << "\",\n";
157  OS << "#endif\n\n";
158}
159
160void IntrinsicEmitter::
161EmitIntrinsicToOverloadTable(const std::vector<CodeGenIntrinsic> &Ints,
162                         raw_ostream &OS) {
163  OS << "// Intrinsic ID to overload table\n";
164  OS << "#ifdef GET_INTRINSIC_OVERLOAD_TABLE\n";
165  OS << "  // Note that entry #0 is the invalid intrinsic!\n";
166  for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
167    OS << "  ";
168    if (Ints[i].isOverloaded)
169      OS << "true";
170    else
171      OS << "false";
172    OS << ",\n";
173  }
174  OS << "#endif\n\n";
175}
176
177static void EmitTypeForValueType(raw_ostream &OS, MVT::SimpleValueType VT) {
178  if (EVT(VT).isInteger()) {
179    unsigned BitWidth = EVT(VT).getSizeInBits();
180    OS << "IntegerType::get(Context, " << BitWidth << ")";
181  } else if (VT == MVT::Other) {
182    // MVT::OtherVT is used to mean the empty struct type here.
183    OS << "StructType::get(Context)";
184  } else if (VT == MVT::f32) {
185    OS << "Type::getFloatTy(Context)";
186  } else if (VT == MVT::f64) {
187    OS << "Type::getDoubleTy(Context)";
188  } else if (VT == MVT::f80) {
189    OS << "Type::getX86_FP80Ty(Context)";
190  } else if (VT == MVT::f128) {
191    OS << "Type::getFP128Ty(Context)";
192  } else if (VT == MVT::ppcf128) {
193    OS << "Type::getPPC_FP128Ty(Context)";
194  } else if (VT == MVT::isVoid) {
195    OS << "Type::getVoidTy(Context)";
196  } else if (VT == MVT::Metadata) {
197    OS << "Type::getMetadataTy(Context)";
198  } else if (VT == MVT::x86mmx) {
199    OS << "Type::getX86_MMXTy(Context)";
200  } else {
201    assert(false && "Unsupported ValueType!");
202  }
203}
204
205static void EmitTypeGenerate(raw_ostream &OS, const Record *ArgType,
206                             unsigned &ArgNo);
207
208static void EmitTypeGenerate(raw_ostream &OS,
209                             const std::vector<Record*> &ArgTypes,
210                             unsigned &ArgNo) {
211  if (ArgTypes.empty())
212    return EmitTypeForValueType(OS, MVT::isVoid);
213
214  if (ArgTypes.size() == 1)
215    return EmitTypeGenerate(OS, ArgTypes.front(), ArgNo);
216
217  OS << "StructType::get(";
218
219  for (std::vector<Record*>::const_iterator
220         I = ArgTypes.begin(), E = ArgTypes.end(); I != E; ++I) {
221    EmitTypeGenerate(OS, *I, ArgNo);
222    OS << ", ";
223  }
224
225  OS << " NULL)";
226}
227
228static void EmitTypeGenerate(raw_ostream &OS, const Record *ArgType,
229                             unsigned &ArgNo) {
230  MVT::SimpleValueType VT = getValueType(ArgType->getValueAsDef("VT"));
231
232  if (ArgType->isSubClassOf("LLVMMatchType")) {
233    unsigned Number = ArgType->getValueAsInt("Number");
234    assert(Number < ArgNo && "Invalid matching number!");
235    if (ArgType->isSubClassOf("LLVMExtendedElementVectorType"))
236      OS << "VectorType::getExtendedElementVectorType"
237         << "(dyn_cast<VectorType>(Tys[" << Number << "]))";
238    else if (ArgType->isSubClassOf("LLVMTruncatedElementVectorType"))
239      OS << "VectorType::getTruncatedElementVectorType"
240         << "(dyn_cast<VectorType>(Tys[" << Number << "]))";
241    else
242      OS << "Tys[" << Number << "]";
243  } else if (VT == MVT::iAny || VT == MVT::fAny || VT == MVT::vAny) {
244    // NOTE: The ArgNo variable here is not the absolute argument number, it is
245    // the index of the "arbitrary" type in the Tys array passed to the
246    // Intrinsic::getDeclaration function. Consequently, we only want to
247    // increment it when we actually hit an overloaded type. Getting this wrong
248    // leads to very subtle bugs!
249    OS << "Tys[" << ArgNo++ << "]";
250  } else if (EVT(VT).isVector()) {
251    EVT VVT = VT;
252    OS << "VectorType::get(";
253    EmitTypeForValueType(OS, VVT.getVectorElementType().getSimpleVT().SimpleTy);
254    OS << ", " << VVT.getVectorNumElements() << ")";
255  } else if (VT == MVT::iPTR) {
256    OS << "PointerType::getUnqual(";
257    EmitTypeGenerate(OS, ArgType->getValueAsDef("ElTy"), ArgNo);
258    OS << ")";
259  } else if (VT == MVT::iPTRAny) {
260    // Make sure the user has passed us an argument type to overload. If not,
261    // treat it as an ordinary (not overloaded) intrinsic.
262    OS << "(" << ArgNo << " < Tys.size()) ? Tys[" << ArgNo
263    << "] : PointerType::getUnqual(";
264    EmitTypeGenerate(OS, ArgType->getValueAsDef("ElTy"), ArgNo);
265    OS << ")";
266    ++ArgNo;
267  } else if (VT == MVT::isVoid) {
268    if (ArgNo == 0)
269      OS << "Type::getVoidTy(Context)";
270    else
271      // MVT::isVoid is used to mean varargs here.
272      OS << "...";
273  } else {
274    EmitTypeForValueType(OS, VT);
275  }
276}
277
278/// RecordListComparator - Provide a deterministic comparator for lists of
279/// records.
280namespace {
281  typedef std::pair<std::vector<Record*>, std::vector<Record*> > RecPair;
282  struct RecordListComparator {
283    bool operator()(const RecPair &LHS,
284                    const RecPair &RHS) const {
285      unsigned i = 0;
286      const std::vector<Record*> *LHSVec = &LHS.first;
287      const std::vector<Record*> *RHSVec = &RHS.first;
288      unsigned RHSSize = RHSVec->size();
289      unsigned LHSSize = LHSVec->size();
290
291      for (; i != LHSSize; ++i) {
292        if (i == RHSSize) return false;  // RHS is shorter than LHS.
293        if ((*LHSVec)[i] != (*RHSVec)[i])
294          return (*LHSVec)[i]->getName() < (*RHSVec)[i]->getName();
295      }
296
297      if (i != RHSSize) return true;
298
299      i = 0;
300      LHSVec = &LHS.second;
301      RHSVec = &RHS.second;
302      RHSSize = RHSVec->size();
303      LHSSize = LHSVec->size();
304
305      for (i = 0; i != LHSSize; ++i) {
306        if (i == RHSSize) return false;  // RHS is shorter than LHS.
307        if ((*LHSVec)[i] != (*RHSVec)[i])
308          return (*LHSVec)[i]->getName() < (*RHSVec)[i]->getName();
309      }
310
311      return i != RHSSize;
312    }
313  };
314}
315
316void IntrinsicEmitter::EmitVerifier(const std::vector<CodeGenIntrinsic> &Ints,
317                                    raw_ostream &OS) {
318  OS << "// Verifier::visitIntrinsicFunctionCall code.\n";
319  OS << "#ifdef GET_INTRINSIC_VERIFIER\n";
320  OS << "  switch (ID) {\n";
321  OS << "  default: assert(0 && \"Invalid intrinsic!\");\n";
322
323  // This checking can emit a lot of very common code.  To reduce the amount of
324  // code that we emit, batch up cases that have identical types.  This avoids
325  // problems where GCC can run out of memory compiling Verifier.cpp.
326  typedef std::map<RecPair, std::vector<unsigned>, RecordListComparator> MapTy;
327  MapTy UniqueArgInfos;
328
329  // Compute the unique argument type info.
330  for (unsigned i = 0, e = Ints.size(); i != e; ++i)
331    UniqueArgInfos[make_pair(Ints[i].IS.RetTypeDefs,
332                             Ints[i].IS.ParamTypeDefs)].push_back(i);
333
334  // Loop through the array, emitting one comparison for each batch.
335  for (MapTy::iterator I = UniqueArgInfos.begin(),
336       E = UniqueArgInfos.end(); I != E; ++I) {
337    for (unsigned i = 0, e = I->second.size(); i != e; ++i)
338      OS << "  case Intrinsic::" << Ints[I->second[i]].EnumName << ":\t\t// "
339         << Ints[I->second[i]].Name << "\n";
340
341    const RecPair &ArgTypes = I->first;
342    const std::vector<Record*> &RetTys = ArgTypes.first;
343    const std::vector<Record*> &ParamTys = ArgTypes.second;
344    std::vector<unsigned> OverloadedTypeIndices;
345
346    OS << "    VerifyIntrinsicPrototype(ID, IF, " << RetTys.size() << ", "
347       << ParamTys.size();
348
349    // Emit return types.
350    for (unsigned j = 0, je = RetTys.size(); j != je; ++j) {
351      Record *ArgType = RetTys[j];
352      OS << ", ";
353
354      if (ArgType->isSubClassOf("LLVMMatchType")) {
355        unsigned Number = ArgType->getValueAsInt("Number");
356        assert(Number < OverloadedTypeIndices.size() &&
357               "Invalid matching number!");
358        Number = OverloadedTypeIndices[Number];
359        if (ArgType->isSubClassOf("LLVMExtendedElementVectorType"))
360          OS << "~(ExtendedElementVectorType | " << Number << ")";
361        else if (ArgType->isSubClassOf("LLVMTruncatedElementVectorType"))
362          OS << "~(TruncatedElementVectorType | " << Number << ")";
363        else
364          OS << "~" << Number;
365      } else {
366        MVT::SimpleValueType VT = getValueType(ArgType->getValueAsDef("VT"));
367        OS << getEnumName(VT);
368
369        if (EVT(VT).isOverloaded())
370          OverloadedTypeIndices.push_back(j);
371
372        if (VT == MVT::isVoid && j != 0 && j != je - 1)
373          throw "Var arg type not last argument";
374      }
375    }
376
377    // Emit the parameter types.
378    for (unsigned j = 0, je = ParamTys.size(); j != je; ++j) {
379      Record *ArgType = ParamTys[j];
380      OS << ", ";
381
382      if (ArgType->isSubClassOf("LLVMMatchType")) {
383        unsigned Number = ArgType->getValueAsInt("Number");
384        assert(Number < OverloadedTypeIndices.size() &&
385               "Invalid matching number!");
386        Number = OverloadedTypeIndices[Number];
387        if (ArgType->isSubClassOf("LLVMExtendedElementVectorType"))
388          OS << "~(ExtendedElementVectorType | " << Number << ")";
389        else if (ArgType->isSubClassOf("LLVMTruncatedElementVectorType"))
390          OS << "~(TruncatedElementVectorType | " << Number << ")";
391        else
392          OS << "~" << Number;
393      } else {
394        MVT::SimpleValueType VT = getValueType(ArgType->getValueAsDef("VT"));
395        OS << getEnumName(VT);
396
397        if (EVT(VT).isOverloaded())
398          OverloadedTypeIndices.push_back(j + RetTys.size());
399
400        if (VT == MVT::isVoid && j != 0 && j != je - 1)
401          throw "Var arg type not last argument";
402      }
403    }
404
405    OS << ");\n";
406    OS << "    break;\n";
407  }
408  OS << "  }\n";
409  OS << "#endif\n\n";
410}
411
412void IntrinsicEmitter::EmitGenerator(const std::vector<CodeGenIntrinsic> &Ints,
413                                     raw_ostream &OS) {
414  OS << "// Code for generating Intrinsic function declarations.\n";
415  OS << "#ifdef GET_INTRINSIC_GENERATOR\n";
416  OS << "  switch (id) {\n";
417  OS << "  default: assert(0 && \"Invalid intrinsic!\");\n";
418
419  // Similar to GET_INTRINSIC_VERIFIER, batch up cases that have identical
420  // types.
421  typedef std::map<RecPair, std::vector<unsigned>, RecordListComparator> MapTy;
422  MapTy UniqueArgInfos;
423
424  // Compute the unique argument type info.
425  for (unsigned i = 0, e = Ints.size(); i != e; ++i)
426    UniqueArgInfos[make_pair(Ints[i].IS.RetTypeDefs,
427                             Ints[i].IS.ParamTypeDefs)].push_back(i);
428
429  // Loop through the array, emitting one generator for each batch.
430  std::string IntrinsicStr = TargetPrefix + "Intrinsic::";
431
432  for (MapTy::iterator I = UniqueArgInfos.begin(),
433       E = UniqueArgInfos.end(); I != E; ++I) {
434    for (unsigned i = 0, e = I->second.size(); i != e; ++i)
435      OS << "  case " << IntrinsicStr << Ints[I->second[i]].EnumName
436         << ":\t\t// " << Ints[I->second[i]].Name << "\n";
437
438    const RecPair &ArgTypes = I->first;
439    const std::vector<Record*> &RetTys = ArgTypes.first;
440    const std::vector<Record*> &ParamTys = ArgTypes.second;
441
442    unsigned N = ParamTys.size();
443
444    if (N > 1 &&
445        getValueType(ParamTys[N - 1]->getValueAsDef("VT")) == MVT::isVoid) {
446      OS << "    IsVarArg = true;\n";
447      --N;
448    }
449
450    unsigned ArgNo = 0;
451    OS << "    ResultTy = ";
452    EmitTypeGenerate(OS, RetTys, ArgNo);
453    OS << ";\n";
454
455    for (unsigned j = 0; j != N; ++j) {
456      OS << "    ArgTys.push_back(";
457      EmitTypeGenerate(OS, ParamTys[j], ArgNo);
458      OS << ");\n";
459    }
460
461    OS << "    break;\n";
462  }
463
464  OS << "  }\n";
465  OS << "#endif\n\n";
466}
467
468namespace {
469  enum ModRefKind {
470    MRK_none,
471    MRK_readonly,
472    MRK_readnone
473  };
474
475  ModRefKind getModRefKind(const CodeGenIntrinsic &intrinsic) {
476    switch (intrinsic.ModRef) {
477    case CodeGenIntrinsic::NoMem:
478      return MRK_readnone;
479    case CodeGenIntrinsic::ReadArgMem:
480    case CodeGenIntrinsic::ReadMem:
481      return MRK_readonly;
482    case CodeGenIntrinsic::ReadWriteArgMem:
483    case CodeGenIntrinsic::ReadWriteMem:
484      return MRK_none;
485    }
486    assert(0 && "bad mod-ref kind");
487    return MRK_none;
488  }
489
490  struct AttributeComparator {
491    bool operator()(const CodeGenIntrinsic *L, const CodeGenIntrinsic *R) const {
492      // Sort throwing intrinsics after non-throwing intrinsics.
493      if (L->canThrow != R->canThrow)
494        return R->canThrow;
495
496      // Try to order by readonly/readnone attribute.
497      ModRefKind LK = getModRefKind(*L);
498      ModRefKind RK = getModRefKind(*R);
499      if (LK != RK) return (LK > RK);
500
501      // Order by argument attributes.
502      // This is reliable because each side is already sorted internally.
503      return (L->ArgumentAttributes < R->ArgumentAttributes);
504    }
505  };
506}
507
508/// EmitAttributes - This emits the Intrinsic::getAttributes method.
509void IntrinsicEmitter::
510EmitAttributes(const std::vector<CodeGenIntrinsic> &Ints, raw_ostream &OS) {
511  OS << "// Add parameter attributes that are not common to all intrinsics.\n";
512  OS << "#ifdef GET_INTRINSIC_ATTRIBUTES\n";
513  if (TargetOnly)
514    OS << "static AttrListPtr getAttributes(" << TargetPrefix
515       << "Intrinsic::ID id) {\n";
516  else
517    OS << "AttrListPtr Intrinsic::getAttributes(ID id) {\n";
518
519  // Compute the maximum number of attribute arguments.
520  std::vector<const CodeGenIntrinsic*> sortedIntrinsics(Ints.size());
521  unsigned maxArgAttrs = 0;
522  for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
523    const CodeGenIntrinsic &intrinsic = Ints[i];
524    sortedIntrinsics[i] = &intrinsic;
525    maxArgAttrs =
526      std::max(maxArgAttrs, unsigned(intrinsic.ArgumentAttributes.size()));
527  }
528
529  // Emit an array of AttributeWithIndex.  Most intrinsics will have
530  // at least one entry, for the function itself (index ~1), which is
531  // usually nounwind.
532  OS << "  AttributeWithIndex AWI[" << maxArgAttrs+1 << "];\n";
533  OS << "  unsigned NumAttrs = 0;\n";
534  OS << "  switch (id) {\n";
535  OS << "    default: break;\n";
536
537  AttributeComparator precedes;
538
539  std::stable_sort(sortedIntrinsics.begin(), sortedIntrinsics.end(), precedes);
540
541  for (unsigned i = 0, e = sortedIntrinsics.size(); i != e; ++i) {
542    const CodeGenIntrinsic &intrinsic = *sortedIntrinsics[i];
543    OS << "  case " << TargetPrefix << "Intrinsic::"
544       << intrinsic.EnumName << ":\n";
545
546    // Fill out the case if this is the last case for this range of
547    // intrinsics.
548    if (i + 1 != e && !precedes(&intrinsic, sortedIntrinsics[i + 1]))
549      continue;
550
551    // Keep track of the number of attributes we're writing out.
552    unsigned numAttrs = 0;
553
554    // The argument attributes are alreadys sorted by argument index.
555    for (unsigned ai = 0, ae = intrinsic.ArgumentAttributes.size(); ai != ae;) {
556      unsigned argNo = intrinsic.ArgumentAttributes[ai].first;
557
558      OS << "    AWI[" << numAttrs++ << "] = AttributeWithIndex::get("
559         << argNo+1 << ", ";
560
561      bool moreThanOne = false;
562
563      do {
564        if (moreThanOne) OS << '|';
565
566        switch (intrinsic.ArgumentAttributes[ai].second) {
567        case CodeGenIntrinsic::NoCapture:
568          OS << "Attribute::NoCapture";
569          break;
570        }
571
572        ++ai;
573        moreThanOne = true;
574      } while (ai != ae && intrinsic.ArgumentAttributes[ai].first == argNo);
575
576      OS << ");\n";
577    }
578
579    ModRefKind modRef = getModRefKind(intrinsic);
580
581    if (!intrinsic.canThrow || modRef) {
582      OS << "    AWI[" << numAttrs++ << "] = AttributeWithIndex::get(~0, ";
583      if (!intrinsic.canThrow) {
584        OS << "Attribute::NoUnwind";
585        if (modRef) OS << '|';
586      }
587      switch (modRef) {
588      case MRK_none: break;
589      case MRK_readonly: OS << "Attribute::ReadOnly"; break;
590      case MRK_readnone: OS << "Attribute::ReadNone"; break;
591      }
592      OS << ");\n";
593    }
594
595    if (numAttrs) {
596      OS << "    NumAttrs = " << numAttrs << ";\n";
597      OS << "    break;\n";
598    } else {
599      OS << "    return AttrListPtr();\n";
600    }
601  }
602
603  OS << "  }\n";
604  OS << "  return AttrListPtr::get(AWI, NumAttrs);\n";
605  OS << "}\n";
606  OS << "#endif // GET_INTRINSIC_ATTRIBUTES\n\n";
607}
608
609/// EmitModRefBehavior - Determine intrinsic alias analysis mod/ref behavior.
610void IntrinsicEmitter::
611EmitModRefBehavior(const std::vector<CodeGenIntrinsic> &Ints, raw_ostream &OS){
612  OS << "// Determine intrinsic alias analysis mod/ref behavior.\n";
613  OS << "#ifdef GET_INTRINSIC_MODREF_BEHAVIOR\n";
614  OS << "switch (iid) {\n";
615  OS << "default:\n    return UnknownModRefBehavior;\n";
616  for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
617    if (Ints[i].ModRef == CodeGenIntrinsic::ReadWriteMem)
618      continue;
619    OS << "case " << TargetPrefix << "Intrinsic::" << Ints[i].EnumName
620      << ":\n";
621    switch (Ints[i].ModRef) {
622    default:
623      assert(false && "Unknown Mod/Ref type!");
624    case CodeGenIntrinsic::NoMem:
625      OS << "  return DoesNotAccessMemory;\n";
626      break;
627    case CodeGenIntrinsic::ReadArgMem:
628      OS << "  return OnlyReadsArgumentPointees;\n";
629      break;
630    case CodeGenIntrinsic::ReadMem:
631      OS << "  return OnlyReadsMemory;\n";
632      break;
633    case CodeGenIntrinsic::ReadWriteArgMem:
634      OS << "  return OnlyAccessesArgumentPointees;\n";
635      break;
636    }
637  }
638  OS << "}\n";
639  OS << "#endif // GET_INTRINSIC_MODREF_BEHAVIOR\n\n";
640}
641
642void IntrinsicEmitter::
643EmitGCCBuiltinList(const std::vector<CodeGenIntrinsic> &Ints, raw_ostream &OS){
644  OS << "// Get the GCC builtin that corresponds to an LLVM intrinsic.\n";
645  OS << "#ifdef GET_GCC_BUILTIN_NAME\n";
646  OS << "  switch (F->getIntrinsicID()) {\n";
647  OS << "  default: BuiltinName = \"\"; break;\n";
648  for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
649    if (!Ints[i].GCCBuiltinName.empty()) {
650      OS << "  case Intrinsic::" << Ints[i].EnumName << ": BuiltinName = \""
651         << Ints[i].GCCBuiltinName << "\"; break;\n";
652    }
653  }
654  OS << "  }\n";
655  OS << "#endif\n\n";
656}
657
658/// EmitTargetBuiltins - All of the builtins in the specified map are for the
659/// same target, and we already checked it.
660static void EmitTargetBuiltins(const std::map<std::string, std::string> &BIM,
661                               const std::string &TargetPrefix,
662                               raw_ostream &OS) {
663
664  std::vector<StringMatcher::StringPair> Results;
665
666  for (std::map<std::string, std::string>::const_iterator I = BIM.begin(),
667       E = BIM.end(); I != E; ++I) {
668    std::string ResultCode =
669    "return " + TargetPrefix + "Intrinsic::" + I->second + ";";
670    Results.push_back(StringMatcher::StringPair(I->first, ResultCode));
671  }
672
673  StringMatcher("BuiltinName", Results, OS).Emit();
674}
675
676
677void IntrinsicEmitter::
678EmitIntrinsicToGCCBuiltinMap(const std::vector<CodeGenIntrinsic> &Ints,
679                             raw_ostream &OS) {
680  typedef std::map<std::string, std::map<std::string, std::string> > BIMTy;
681  BIMTy BuiltinMap;
682  for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
683    if (!Ints[i].GCCBuiltinName.empty()) {
684      // Get the map for this target prefix.
685      std::map<std::string, std::string> &BIM =BuiltinMap[Ints[i].TargetPrefix];
686
687      if (!BIM.insert(std::make_pair(Ints[i].GCCBuiltinName,
688                                     Ints[i].EnumName)).second)
689        throw "Intrinsic '" + Ints[i].TheDef->getName() +
690              "': duplicate GCC builtin name!";
691    }
692  }
693
694  OS << "// Get the LLVM intrinsic that corresponds to a GCC builtin.\n";
695  OS << "// This is used by the C front-end.  The GCC builtin name is passed\n";
696  OS << "// in as BuiltinName, and a target prefix (e.g. 'ppc') is passed\n";
697  OS << "// in as TargetPrefix.  The result is assigned to 'IntrinsicID'.\n";
698  OS << "#ifdef GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN\n";
699
700  if (TargetOnly) {
701    OS << "static " << TargetPrefix << "Intrinsic::ID "
702       << "getIntrinsicForGCCBuiltin(const char "
703       << "*TargetPrefixStr, const char *BuiltinNameStr) {\n";
704  } else {
705    OS << "Intrinsic::ID Intrinsic::getIntrinsicForGCCBuiltin(const char "
706       << "*TargetPrefixStr, const char *BuiltinNameStr) {\n";
707  }
708
709  OS << "  StringRef BuiltinName(BuiltinNameStr);\n";
710  OS << "  StringRef TargetPrefix(TargetPrefixStr);\n\n";
711
712  // Note: this could emit significantly better code if we cared.
713  for (BIMTy::iterator I = BuiltinMap.begin(), E = BuiltinMap.end();I != E;++I){
714    OS << "  ";
715    if (!I->first.empty())
716      OS << "if (TargetPrefix == \"" << I->first << "\") ";
717    else
718      OS << "/* Target Independent Builtins */ ";
719    OS << "{\n";
720
721    // Emit the comparisons for this target prefix.
722    EmitTargetBuiltins(I->second, TargetPrefix, OS);
723    OS << "  }\n";
724  }
725  OS << "  return ";
726  if (!TargetPrefix.empty())
727    OS << "(" << TargetPrefix << "Intrinsic::ID)";
728  OS << "Intrinsic::not_intrinsic;\n";
729  OS << "}\n";
730  OS << "#endif\n\n";
731}
732