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 "CodeGenIntrinsics.h"
15#include "CodeGenTarget.h"
16#include "SequenceToOffsetTable.h"
17#include "TableGenBackends.h"
18#include "llvm/ADT/StringExtras.h"
19#include "llvm/TableGen/Error.h"
20#include "llvm/TableGen/Record.h"
21#include "llvm/TableGen/StringMatcher.h"
22#include "llvm/TableGen/TableGenBackend.h"
23#include "llvm/TableGen/StringToOffsetTable.h"
24#include <algorithm>
25using namespace llvm;
26
27namespace {
28class IntrinsicEmitter {
29  RecordKeeper &Records;
30  bool TargetOnly;
31  std::string TargetPrefix;
32
33public:
34  IntrinsicEmitter(RecordKeeper &R, bool T)
35    : Records(R), TargetOnly(T) {}
36
37  void run(raw_ostream &OS);
38
39  void EmitPrefix(raw_ostream &OS);
40
41  void EmitEnumInfo(const std::vector<CodeGenIntrinsic> &Ints,
42                    raw_ostream &OS);
43
44  void EmitIntrinsicToNameTable(const std::vector<CodeGenIntrinsic> &Ints,
45                                raw_ostream &OS);
46  void EmitIntrinsicToOverloadTable(const std::vector<CodeGenIntrinsic> &Ints,
47                                    raw_ostream &OS);
48  void EmitGenerator(const std::vector<CodeGenIntrinsic> &Ints,
49                     raw_ostream &OS);
50  void EmitAttributes(const std::vector<CodeGenIntrinsic> &Ints,
51                      raw_ostream &OS);
52  void EmitIntrinsicToBuiltinMap(const std::vector<CodeGenIntrinsic> &Ints,
53                                 bool IsGCC, raw_ostream &OS);
54  void EmitSuffix(raw_ostream &OS);
55};
56} // End anonymous namespace
57
58//===----------------------------------------------------------------------===//
59// IntrinsicEmitter Implementation
60//===----------------------------------------------------------------------===//
61
62void IntrinsicEmitter::run(raw_ostream &OS) {
63  emitSourceFileHeader("Intrinsic Function Source Fragment", OS);
64
65  std::vector<CodeGenIntrinsic> Ints = LoadIntrinsics(Records, TargetOnly);
66
67  if (TargetOnly && !Ints.empty())
68    TargetPrefix = Ints[0].TargetPrefix;
69
70  EmitPrefix(OS);
71
72  // Emit the enum information.
73  EmitEnumInfo(Ints, OS);
74
75  // Emit the intrinsic ID -> name table.
76  EmitIntrinsicToNameTable(Ints, OS);
77
78  // Emit the intrinsic ID -> overload table.
79  EmitIntrinsicToOverloadTable(Ints, OS);
80
81  // Emit the intrinsic declaration generator.
82  EmitGenerator(Ints, OS);
83
84  // Emit the intrinsic parameter attributes.
85  EmitAttributes(Ints, OS);
86
87  // Individual targets don't need GCC builtin name mappings.
88  if (!TargetOnly) {
89    // Emit code to translate GCC builtins into LLVM intrinsics.
90    EmitIntrinsicToBuiltinMap(Ints, true, OS);
91
92    // Emit code to translate MS builtins into LLVM intrinsics.
93    EmitIntrinsicToBuiltinMap(Ints, false, OS);
94  }
95
96  EmitSuffix(OS);
97}
98
99void IntrinsicEmitter::EmitPrefix(raw_ostream &OS) {
100  OS << "// VisualStudio defines setjmp as _setjmp\n"
101        "#if defined(_MSC_VER) && defined(setjmp) && \\\n"
102        "                         !defined(setjmp_undefined_for_msvc)\n"
103        "#  pragma push_macro(\"setjmp\")\n"
104        "#  undef setjmp\n"
105        "#  define setjmp_undefined_for_msvc\n"
106        "#endif\n\n";
107}
108
109void IntrinsicEmitter::EmitSuffix(raw_ostream &OS) {
110  OS << "#if defined(_MSC_VER) && defined(setjmp_undefined_for_msvc)\n"
111        "// let's return it to _setjmp state\n"
112        "#  pragma pop_macro(\"setjmp\")\n"
113        "#  undef setjmp_undefined_for_msvc\n"
114        "#endif\n\n";
115}
116
117void IntrinsicEmitter::EmitEnumInfo(const std::vector<CodeGenIntrinsic> &Ints,
118                                    raw_ostream &OS) {
119  OS << "// Enum values for Intrinsics.h\n";
120  OS << "#ifdef GET_INTRINSIC_ENUM_VALUES\n";
121  for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
122    OS << "    " << Ints[i].EnumName;
123    OS << ((i != e-1) ? ", " : "  ");
124    if (Ints[i].EnumName.size() < 40)
125      OS << std::string(40-Ints[i].EnumName.size(), ' ');
126    OS << " // " << Ints[i].Name << "\n";
127  }
128  OS << "#endif\n\n";
129}
130
131void IntrinsicEmitter::
132EmitIntrinsicToNameTable(const std::vector<CodeGenIntrinsic> &Ints,
133                         raw_ostream &OS) {
134  OS << "// Intrinsic ID to name table\n";
135  OS << "#ifdef GET_INTRINSIC_NAME_TABLE\n";
136  OS << "  // Note that entry #0 is the invalid intrinsic!\n";
137  for (unsigned i = 0, e = Ints.size(); i != e; ++i)
138    OS << "  \"" << Ints[i].Name << "\",\n";
139  OS << "#endif\n\n";
140}
141
142void IntrinsicEmitter::
143EmitIntrinsicToOverloadTable(const std::vector<CodeGenIntrinsic> &Ints,
144                         raw_ostream &OS) {
145  OS << "// Intrinsic ID to overload bitset\n";
146  OS << "#ifdef GET_INTRINSIC_OVERLOAD_TABLE\n";
147  OS << "static const uint8_t OTable[] = {\n";
148  OS << "  0";
149  for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
150    // Add one to the index so we emit a null bit for the invalid #0 intrinsic.
151    if ((i+1)%8 == 0)
152      OS << ",\n  0";
153    if (Ints[i].isOverloaded)
154      OS << " | (1<<" << (i+1)%8 << ')';
155  }
156  OS << "\n};\n\n";
157  // OTable contains a true bit at the position if the intrinsic is overloaded.
158  OS << "return (OTable[id/8] & (1 << (id%8))) != 0;\n";
159  OS << "#endif\n\n";
160}
161
162
163// NOTE: This must be kept in synch with the copy in lib/VMCore/Function.cpp!
164enum IIT_Info {
165  // Common values should be encoded with 0-15.
166  IIT_Done = 0,
167  IIT_I1   = 1,
168  IIT_I8   = 2,
169  IIT_I16  = 3,
170  IIT_I32  = 4,
171  IIT_I64  = 5,
172  IIT_F16  = 6,
173  IIT_F32  = 7,
174  IIT_F64  = 8,
175  IIT_V2   = 9,
176  IIT_V4   = 10,
177  IIT_V8   = 11,
178  IIT_V16  = 12,
179  IIT_V32  = 13,
180  IIT_PTR  = 14,
181  IIT_ARG  = 15,
182
183  // Values from 16+ are only encodable with the inefficient encoding.
184  IIT_V64  = 16,
185  IIT_MMX  = 17,
186  IIT_TOKEN = 18,
187  IIT_METADATA = 19,
188  IIT_EMPTYSTRUCT = 20,
189  IIT_STRUCT2 = 21,
190  IIT_STRUCT3 = 22,
191  IIT_STRUCT4 = 23,
192  IIT_STRUCT5 = 24,
193  IIT_EXTEND_ARG = 25,
194  IIT_TRUNC_ARG = 26,
195  IIT_ANYPTR = 27,
196  IIT_V1   = 28,
197  IIT_VARARG = 29,
198  IIT_HALF_VEC_ARG = 30,
199  IIT_SAME_VEC_WIDTH_ARG = 31,
200  IIT_PTR_TO_ARG = 32,
201  IIT_VEC_OF_PTRS_TO_ELT = 33,
202  IIT_I128 = 34,
203  IIT_V512 = 35,
204  IIT_V1024 = 36
205};
206
207
208static void EncodeFixedValueType(MVT::SimpleValueType VT,
209                                 std::vector<unsigned char> &Sig) {
210  if (MVT(VT).isInteger()) {
211    unsigned BitWidth = MVT(VT).getSizeInBits();
212    switch (BitWidth) {
213    default: PrintFatalError("unhandled integer type width in intrinsic!");
214    case 1: return Sig.push_back(IIT_I1);
215    case 8: return Sig.push_back(IIT_I8);
216    case 16: return Sig.push_back(IIT_I16);
217    case 32: return Sig.push_back(IIT_I32);
218    case 64: return Sig.push_back(IIT_I64);
219    case 128: return Sig.push_back(IIT_I128);
220    }
221  }
222
223  switch (VT) {
224  default: PrintFatalError("unhandled MVT in intrinsic!");
225  case MVT::f16: return Sig.push_back(IIT_F16);
226  case MVT::f32: return Sig.push_back(IIT_F32);
227  case MVT::f64: return Sig.push_back(IIT_F64);
228  case MVT::token: return Sig.push_back(IIT_TOKEN);
229  case MVT::Metadata: return Sig.push_back(IIT_METADATA);
230  case MVT::x86mmx: return Sig.push_back(IIT_MMX);
231  // MVT::OtherVT is used to mean the empty struct type here.
232  case MVT::Other: return Sig.push_back(IIT_EMPTYSTRUCT);
233  // MVT::isVoid is used to represent varargs here.
234  case MVT::isVoid: return Sig.push_back(IIT_VARARG);
235  }
236}
237
238#if defined(_MSC_VER) && !defined(__clang__)
239#pragma optimize("",off) // MSVC 2010 optimizer can't deal with this function.
240#endif
241
242static void EncodeFixedType(Record *R, std::vector<unsigned char> &ArgCodes,
243                            std::vector<unsigned char> &Sig) {
244
245  if (R->isSubClassOf("LLVMMatchType")) {
246    unsigned Number = R->getValueAsInt("Number");
247    assert(Number < ArgCodes.size() && "Invalid matching number!");
248    if (R->isSubClassOf("LLVMExtendedType"))
249      Sig.push_back(IIT_EXTEND_ARG);
250    else if (R->isSubClassOf("LLVMTruncatedType"))
251      Sig.push_back(IIT_TRUNC_ARG);
252    else if (R->isSubClassOf("LLVMHalfElementsVectorType"))
253      Sig.push_back(IIT_HALF_VEC_ARG);
254    else if (R->isSubClassOf("LLVMVectorSameWidth")) {
255      Sig.push_back(IIT_SAME_VEC_WIDTH_ARG);
256      Sig.push_back((Number << 3) | ArgCodes[Number]);
257      MVT::SimpleValueType VT = getValueType(R->getValueAsDef("ElTy"));
258      EncodeFixedValueType(VT, Sig);
259      return;
260    }
261    else if (R->isSubClassOf("LLVMPointerTo"))
262      Sig.push_back(IIT_PTR_TO_ARG);
263    else if (R->isSubClassOf("LLVMVectorOfPointersToElt"))
264      Sig.push_back(IIT_VEC_OF_PTRS_TO_ELT);
265    else
266      Sig.push_back(IIT_ARG);
267    return Sig.push_back((Number << 3) | ArgCodes[Number]);
268  }
269
270  MVT::SimpleValueType VT = getValueType(R->getValueAsDef("VT"));
271
272  unsigned Tmp = 0;
273  switch (VT) {
274  default: break;
275  case MVT::iPTRAny: ++Tmp; // FALL THROUGH.
276  case MVT::vAny: ++Tmp; // FALL THROUGH.
277  case MVT::fAny: ++Tmp; // FALL THROUGH.
278  case MVT::iAny: ++Tmp; // FALL THROUGH.
279  case MVT::Any: {
280    // If this is an "any" valuetype, then the type is the type of the next
281    // type in the list specified to getIntrinsic().
282    Sig.push_back(IIT_ARG);
283
284    // Figure out what arg # this is consuming, and remember what kind it was.
285    unsigned ArgNo = ArgCodes.size();
286    ArgCodes.push_back(Tmp);
287
288    // Encode what sort of argument it must be in the low 3 bits of the ArgNo.
289    return Sig.push_back((ArgNo << 3) | Tmp);
290  }
291
292  case MVT::iPTR: {
293    unsigned AddrSpace = 0;
294    if (R->isSubClassOf("LLVMQualPointerType")) {
295      AddrSpace = R->getValueAsInt("AddrSpace");
296      assert(AddrSpace < 256 && "Address space exceeds 255");
297    }
298    if (AddrSpace) {
299      Sig.push_back(IIT_ANYPTR);
300      Sig.push_back(AddrSpace);
301    } else {
302      Sig.push_back(IIT_PTR);
303    }
304    return EncodeFixedType(R->getValueAsDef("ElTy"), ArgCodes, Sig);
305  }
306  }
307
308  if (MVT(VT).isVector()) {
309    MVT VVT = VT;
310    switch (VVT.getVectorNumElements()) {
311    default: PrintFatalError("unhandled vector type width in intrinsic!");
312    case 1: Sig.push_back(IIT_V1); break;
313    case 2: Sig.push_back(IIT_V2); break;
314    case 4: Sig.push_back(IIT_V4); break;
315    case 8: Sig.push_back(IIT_V8); break;
316    case 16: Sig.push_back(IIT_V16); break;
317    case 32: Sig.push_back(IIT_V32); break;
318    case 64: Sig.push_back(IIT_V64); break;
319    case 512: Sig.push_back(IIT_V512); break;
320    case 1024: Sig.push_back(IIT_V1024); break;
321    }
322
323    return EncodeFixedValueType(VVT.getVectorElementType().SimpleTy, Sig);
324  }
325
326  EncodeFixedValueType(VT, Sig);
327}
328
329#if defined(_MSC_VER) && !defined(__clang__)
330#pragma optimize("",on)
331#endif
332
333/// ComputeFixedEncoding - If we can encode the type signature for this
334/// intrinsic into 32 bits, return it.  If not, return ~0U.
335static void ComputeFixedEncoding(const CodeGenIntrinsic &Int,
336                                 std::vector<unsigned char> &TypeSig) {
337  std::vector<unsigned char> ArgCodes;
338
339  if (Int.IS.RetVTs.empty())
340    TypeSig.push_back(IIT_Done);
341  else if (Int.IS.RetVTs.size() == 1 &&
342           Int.IS.RetVTs[0] == MVT::isVoid)
343    TypeSig.push_back(IIT_Done);
344  else {
345    switch (Int.IS.RetVTs.size()) {
346      case 1: break;
347      case 2: TypeSig.push_back(IIT_STRUCT2); break;
348      case 3: TypeSig.push_back(IIT_STRUCT3); break;
349      case 4: TypeSig.push_back(IIT_STRUCT4); break;
350      case 5: TypeSig.push_back(IIT_STRUCT5); break;
351      default: llvm_unreachable("Unhandled case in struct");
352    }
353
354    for (unsigned i = 0, e = Int.IS.RetVTs.size(); i != e; ++i)
355      EncodeFixedType(Int.IS.RetTypeDefs[i], ArgCodes, TypeSig);
356  }
357
358  for (unsigned i = 0, e = Int.IS.ParamTypeDefs.size(); i != e; ++i)
359    EncodeFixedType(Int.IS.ParamTypeDefs[i], ArgCodes, TypeSig);
360}
361
362static void printIITEntry(raw_ostream &OS, unsigned char X) {
363  OS << (unsigned)X;
364}
365
366void IntrinsicEmitter::EmitGenerator(const std::vector<CodeGenIntrinsic> &Ints,
367                                     raw_ostream &OS) {
368  // If we can compute a 32-bit fixed encoding for this intrinsic, do so and
369  // capture it in this vector, otherwise store a ~0U.
370  std::vector<unsigned> FixedEncodings;
371
372  SequenceToOffsetTable<std::vector<unsigned char> > LongEncodingTable;
373
374  std::vector<unsigned char> TypeSig;
375
376  // Compute the unique argument type info.
377  for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
378    // Get the signature for the intrinsic.
379    TypeSig.clear();
380    ComputeFixedEncoding(Ints[i], TypeSig);
381
382    // Check to see if we can encode it into a 32-bit word.  We can only encode
383    // 8 nibbles into a 32-bit word.
384    if (TypeSig.size() <= 8) {
385      bool Failed = false;
386      unsigned Result = 0;
387      for (unsigned i = 0, e = TypeSig.size(); i != e; ++i) {
388        // If we had an unencodable argument, bail out.
389        if (TypeSig[i] > 15) {
390          Failed = true;
391          break;
392        }
393        Result = (Result << 4) | TypeSig[e-i-1];
394      }
395
396      // If this could be encoded into a 31-bit word, return it.
397      if (!Failed && (Result >> 31) == 0) {
398        FixedEncodings.push_back(Result);
399        continue;
400      }
401    }
402
403    // Otherwise, we're going to unique the sequence into the
404    // LongEncodingTable, and use its offset in the 32-bit table instead.
405    LongEncodingTable.add(TypeSig);
406
407    // This is a placehold that we'll replace after the table is laid out.
408    FixedEncodings.push_back(~0U);
409  }
410
411  LongEncodingTable.layout();
412
413  OS << "// Global intrinsic function declaration type table.\n";
414  OS << "#ifdef GET_INTRINSIC_GENERATOR_GLOBAL\n";
415
416  OS << "static const unsigned IIT_Table[] = {\n  ";
417
418  for (unsigned i = 0, e = FixedEncodings.size(); i != e; ++i) {
419    if ((i & 7) == 7)
420      OS << "\n  ";
421
422    // If the entry fit in the table, just emit it.
423    if (FixedEncodings[i] != ~0U) {
424      OS << "0x" << utohexstr(FixedEncodings[i]) << ", ";
425      continue;
426    }
427
428    TypeSig.clear();
429    ComputeFixedEncoding(Ints[i], TypeSig);
430
431
432    // Otherwise, emit the offset into the long encoding table.  We emit it this
433    // way so that it is easier to read the offset in the .def file.
434    OS << "(1U<<31) | " << LongEncodingTable.get(TypeSig) << ", ";
435  }
436
437  OS << "0\n};\n\n";
438
439  // Emit the shared table of register lists.
440  OS << "static const unsigned char IIT_LongEncodingTable[] = {\n";
441  if (!LongEncodingTable.empty())
442    LongEncodingTable.emit(OS, printIITEntry);
443  OS << "  255\n};\n\n";
444
445  OS << "#endif\n\n";  // End of GET_INTRINSIC_GENERATOR_GLOBAL
446}
447
448namespace {
449struct AttributeComparator {
450  bool operator()(const CodeGenIntrinsic *L, const CodeGenIntrinsic *R) const {
451    // Sort throwing intrinsics after non-throwing intrinsics.
452    if (L->canThrow != R->canThrow)
453      return R->canThrow;
454
455    if (L->isNoDuplicate != R->isNoDuplicate)
456      return R->isNoDuplicate;
457
458    if (L->isNoReturn != R->isNoReturn)
459      return R->isNoReturn;
460
461    if (L->isConvergent != R->isConvergent)
462      return R->isConvergent;
463
464    // Try to order by readonly/readnone attribute.
465    CodeGenIntrinsic::ModRefBehavior LK = L->ModRef;
466    CodeGenIntrinsic::ModRefBehavior RK = R->ModRef;
467    if (LK != RK) return (LK > RK);
468
469    // Order by argument attributes.
470    // This is reliable because each side is already sorted internally.
471    return (L->ArgumentAttributes < R->ArgumentAttributes);
472  }
473};
474} // End anonymous namespace
475
476/// EmitAttributes - This emits the Intrinsic::getAttributes method.
477void IntrinsicEmitter::
478EmitAttributes(const std::vector<CodeGenIntrinsic> &Ints, raw_ostream &OS) {
479  OS << "// Add parameter attributes that are not common to all intrinsics.\n";
480  OS << "#ifdef GET_INTRINSIC_ATTRIBUTES\n";
481  if (TargetOnly)
482    OS << "static AttributeSet getAttributes(LLVMContext &C, " << TargetPrefix
483       << "Intrinsic::ID id) {\n";
484  else
485    OS << "AttributeSet Intrinsic::getAttributes(LLVMContext &C, ID id) {\n";
486
487  // Compute the maximum number of attribute arguments and the map
488  typedef std::map<const CodeGenIntrinsic*, unsigned,
489                   AttributeComparator> UniqAttrMapTy;
490  UniqAttrMapTy UniqAttributes;
491  unsigned maxArgAttrs = 0;
492  unsigned AttrNum = 0;
493  for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
494    const CodeGenIntrinsic &intrinsic = Ints[i];
495    maxArgAttrs =
496      std::max(maxArgAttrs, unsigned(intrinsic.ArgumentAttributes.size()));
497    unsigned &N = UniqAttributes[&intrinsic];
498    if (N) continue;
499    assert(AttrNum < 256 && "Too many unique attributes for table!");
500    N = ++AttrNum;
501  }
502
503  // Emit an array of AttributeSet.  Most intrinsics will have at least one
504  // entry, for the function itself (index ~1), which is usually nounwind.
505  OS << "  static const uint8_t IntrinsicsToAttributesMap[] = {\n";
506
507  for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
508    const CodeGenIntrinsic &intrinsic = Ints[i];
509
510    OS << "    " << UniqAttributes[&intrinsic] << ", // "
511       << intrinsic.Name << "\n";
512  }
513  OS << "  };\n\n";
514
515  OS << "  AttributeSet AS[" << maxArgAttrs+1 << "];\n";
516  OS << "  unsigned NumAttrs = 0;\n";
517  OS << "  if (id != 0) {\n";
518  OS << "    switch(IntrinsicsToAttributesMap[id - ";
519  if (TargetOnly)
520    OS << "Intrinsic::num_intrinsics";
521  else
522    OS << "1";
523  OS << "]) {\n";
524  OS << "    default: llvm_unreachable(\"Invalid attribute number\");\n";
525  for (UniqAttrMapTy::const_iterator I = UniqAttributes.begin(),
526       E = UniqAttributes.end(); I != E; ++I) {
527    OS << "    case " << I->second << ": {\n";
528
529    const CodeGenIntrinsic &intrinsic = *(I->first);
530
531    // Keep track of the number of attributes we're writing out.
532    unsigned numAttrs = 0;
533
534    // The argument attributes are alreadys sorted by argument index.
535    unsigned ai = 0, ae = intrinsic.ArgumentAttributes.size();
536    if (ae) {
537      while (ai != ae) {
538        unsigned argNo = intrinsic.ArgumentAttributes[ai].first;
539
540        OS <<  "      const Attribute::AttrKind AttrParam" << argNo + 1 <<"[]= {";
541        bool addComma = false;
542
543        do {
544          switch (intrinsic.ArgumentAttributes[ai].second) {
545          case CodeGenIntrinsic::NoCapture:
546            if (addComma)
547              OS << ",";
548            OS << "Attribute::NoCapture";
549            addComma = true;
550            break;
551          case CodeGenIntrinsic::Returned:
552            if (addComma)
553              OS << ",";
554            OS << "Attribute::Returned";
555            addComma = true;
556            break;
557          case CodeGenIntrinsic::ReadOnly:
558            if (addComma)
559              OS << ",";
560            OS << "Attribute::ReadOnly";
561            addComma = true;
562            break;
563          case CodeGenIntrinsic::WriteOnly:
564            if (addComma)
565              OS << ",";
566            OS << "Attribute::WriteOnly";
567            addComma = true;
568            break;
569          case CodeGenIntrinsic::ReadNone:
570            if (addComma)
571              OS << ",";
572            OS << "Attribute::ReadNone";
573            addComma = true;
574            break;
575          }
576
577          ++ai;
578        } while (ai != ae && intrinsic.ArgumentAttributes[ai].first == argNo);
579        OS << "};\n";
580        OS << "      AS[" << numAttrs++ << "] = AttributeSet::get(C, "
581           << argNo+1 << ", AttrParam" << argNo +1 << ");\n";
582      }
583    }
584
585    if (!intrinsic.canThrow ||
586        intrinsic.ModRef != CodeGenIntrinsic::ReadWriteMem ||
587        intrinsic.isNoReturn || intrinsic.isNoDuplicate ||
588        intrinsic.isConvergent) {
589      OS << "      const Attribute::AttrKind Atts[] = {";
590      bool addComma = false;
591      if (!intrinsic.canThrow) {
592        OS << "Attribute::NoUnwind";
593        addComma = true;
594      }
595      if (intrinsic.isNoReturn) {
596        if (addComma)
597          OS << ",";
598        OS << "Attribute::NoReturn";
599        addComma = true;
600      }
601      if (intrinsic.isNoDuplicate) {
602        if (addComma)
603          OS << ",";
604        OS << "Attribute::NoDuplicate";
605        addComma = true;
606      }
607      if (intrinsic.isConvergent) {
608        if (addComma)
609          OS << ",";
610        OS << "Attribute::Convergent";
611        addComma = true;
612      }
613
614      switch (intrinsic.ModRef) {
615      case CodeGenIntrinsic::NoMem:
616        if (addComma)
617          OS << ",";
618        OS << "Attribute::ReadNone";
619        break;
620      case CodeGenIntrinsic::ReadArgMem:
621        if (addComma)
622          OS << ",";
623        OS << "Attribute::ReadOnly,";
624        OS << "Attribute::ArgMemOnly";
625        break;
626      case CodeGenIntrinsic::ReadMem:
627        if (addComma)
628          OS << ",";
629        OS << "Attribute::ReadOnly";
630        break;
631      case CodeGenIntrinsic::WriteArgMem:
632        if (addComma)
633          OS << ",";
634        OS << "Attribute::WriteOnly,";
635        OS << "Attribute::ArgMemOnly";
636        break;
637      case CodeGenIntrinsic::WriteMem:
638        if (addComma)
639          OS << ",";
640        OS << "Attribute::WriteOnly";
641        break;
642      case CodeGenIntrinsic::ReadWriteArgMem:
643        if (addComma)
644          OS << ",";
645        OS << "Attribute::ArgMemOnly";
646        break;
647      case CodeGenIntrinsic::ReadWriteMem:
648        break;
649      }
650      OS << "};\n";
651      OS << "      AS[" << numAttrs++ << "] = AttributeSet::get(C, "
652         << "AttributeSet::FunctionIndex, Atts);\n";
653    }
654
655    if (numAttrs) {
656      OS << "      NumAttrs = " << numAttrs << ";\n";
657      OS << "      break;\n";
658      OS << "      }\n";
659    } else {
660      OS << "      return AttributeSet();\n";
661      OS << "      }\n";
662    }
663  }
664
665  OS << "    }\n";
666  OS << "  }\n";
667  OS << "  return AttributeSet::get(C, makeArrayRef(AS, NumAttrs));\n";
668  OS << "}\n";
669  OS << "#endif // GET_INTRINSIC_ATTRIBUTES\n\n";
670}
671
672void IntrinsicEmitter::EmitIntrinsicToBuiltinMap(
673    const std::vector<CodeGenIntrinsic> &Ints, bool IsGCC, raw_ostream &OS) {
674  StringRef CompilerName = (IsGCC ? "GCC" : "MS");
675  typedef std::map<std::string, std::map<std::string, std::string>> BIMTy;
676  BIMTy BuiltinMap;
677  StringToOffsetTable Table;
678  for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
679    const std::string &BuiltinName =
680        IsGCC ? Ints[i].GCCBuiltinName : Ints[i].MSBuiltinName;
681    if (!BuiltinName.empty()) {
682      // Get the map for this target prefix.
683      std::map<std::string, std::string> &BIM =
684          BuiltinMap[Ints[i].TargetPrefix];
685
686      if (!BIM.insert(std::make_pair(BuiltinName, Ints[i].EnumName)).second)
687        PrintFatalError("Intrinsic '" + Ints[i].TheDef->getName() +
688                        "': duplicate " + CompilerName + " builtin name!");
689      Table.GetOrAddStringOffset(BuiltinName);
690    }
691  }
692
693  OS << "// Get the LLVM intrinsic that corresponds to a builtin.\n";
694  OS << "// This is used by the C front-end.  The builtin name is passed\n";
695  OS << "// in as BuiltinName, and a target prefix (e.g. 'ppc') is passed\n";
696  OS << "// in as TargetPrefix.  The result is assigned to 'IntrinsicID'.\n";
697  OS << "#ifdef GET_LLVM_INTRINSIC_FOR_" << CompilerName << "_BUILTIN\n";
698
699  if (TargetOnly) {
700    OS << "static " << TargetPrefix << "Intrinsic::ID "
701       << "getIntrinsicFor" << CompilerName << "Builtin(const char "
702       << "*TargetPrefixStr, const char *BuiltinNameStr) {\n";
703  } else {
704    OS << "Intrinsic::ID Intrinsic::getIntrinsicFor" << CompilerName
705       << "Builtin(const char "
706       << "*TargetPrefixStr, const char *BuiltinNameStr) {\n";
707  }
708  OS << "  static const char BuiltinNames[] = {\n";
709  Table.EmitCharArray(OS);
710  OS << "  };\n\n";
711
712  OS << "  struct BuiltinEntry {\n";
713  OS << "    Intrinsic::ID IntrinID;\n";
714  OS << "    unsigned StrTabOffset;\n";
715  OS << "    const char *getName() const {\n";
716  OS << "      return &BuiltinNames[StrTabOffset];\n";
717  OS << "    }\n";
718  OS << "    bool operator<(const char *RHS) const {\n";
719  OS << "      return strcmp(getName(), RHS) < 0;\n";
720  OS << "    }\n";
721  OS << "  };\n";
722
723
724  OS << "  StringRef BuiltinName(BuiltinNameStr);\n";
725  OS << "  StringRef TargetPrefix(TargetPrefixStr);\n\n";
726
727  // Note: this could emit significantly better code if we cared.
728  for (BIMTy::iterator I = BuiltinMap.begin(), E = BuiltinMap.end();I != E;++I){
729    OS << "  ";
730    if (!I->first.empty())
731      OS << "if (TargetPrefix == \"" << I->first << "\") ";
732    else
733      OS << "/* Target Independent Builtins */ ";
734    OS << "{\n";
735
736    // Emit the comparisons for this target prefix.
737    OS << "    static const BuiltinEntry " << I->first << "Names[] = {\n";
738    for (const auto &P : I->second) {
739      OS << "      {Intrinsic::" << P.second << ", "
740         << Table.GetOrAddStringOffset(P.first) << "}, // " << P.first << "\n";
741    }
742    OS << "    };\n";
743    OS << "    auto I = std::lower_bound(std::begin(" << I->first << "Names),\n";
744    OS << "                              std::end(" << I->first << "Names),\n";
745    OS << "                              BuiltinNameStr);\n";
746    OS << "    if (I != std::end(" << I->first << "Names) &&\n";
747    OS << "        strcmp(I->getName(), BuiltinNameStr) == 0)\n";
748    OS << "      return I->IntrinID;\n";
749    OS << "  }\n";
750  }
751  OS << "  return ";
752  if (!TargetPrefix.empty())
753    OS << "(" << TargetPrefix << "Intrinsic::ID)";
754  OS << "Intrinsic::not_intrinsic;\n";
755  OS << "}\n";
756  OS << "#endif\n\n";
757}
758
759void llvm::EmitIntrinsics(RecordKeeper &RK, raw_ostream &OS, bool TargetOnly) {
760  IntrinsicEmitter(RK, TargetOnly).run(OS);
761}
762