1 //===- CodeGenTarget.cpp - CodeGen Target Class Wrapper -------------------===//
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 class wraps target description classes used by the various code
11 // generation TableGen backends.  This makes it easier to access the data and
12 // provides a single place that needs to check it for validity.  All of these
13 // classes throw exceptions on error conditions.
14 //
15 //===----------------------------------------------------------------------===//
16 
17 #include "CodeGenTarget.h"
18 #include "CodeGenIntrinsics.h"
19 #include "Record.h"
20 #include "llvm/ADT/StringExtras.h"
21 #include "llvm/ADT/STLExtras.h"
22 #include "llvm/Support/CommandLine.h"
23 #include <algorithm>
24 using namespace llvm;
25 
26 static cl::opt<unsigned>
27 AsmParserNum("asmparsernum", cl::init(0),
28              cl::desc("Make -gen-asm-parser emit assembly parser #N"));
29 
30 static cl::opt<unsigned>
31 AsmWriterNum("asmwriternum", cl::init(0),
32              cl::desc("Make -gen-asm-writer emit assembly writer #N"));
33 
34 /// getValueType - Return the MVT::SimpleValueType that the specified TableGen
35 /// record corresponds to.
36 MVT::SimpleValueType llvm::getValueType(Record *Rec) {
37   return (MVT::SimpleValueType)Rec->getValueAsInt("Value");
38 }
39 
40 std::string llvm::getName(MVT::SimpleValueType T) {
41   switch (T) {
42   case MVT::Other:   return "UNKNOWN";
43   case MVT::iPTR:    return "TLI.getPointerTy()";
44   case MVT::iPTRAny: return "TLI.getPointerTy()";
45   default: return getEnumName(T);
46   }
47 }
48 
49 std::string llvm::getEnumName(MVT::SimpleValueType T) {
50   switch (T) {
51   case MVT::Other:    return "MVT::Other";
52   case MVT::i1:       return "MVT::i1";
53   case MVT::i8:       return "MVT::i8";
54   case MVT::i16:      return "MVT::i16";
55   case MVT::i32:      return "MVT::i32";
56   case MVT::i64:      return "MVT::i64";
57   case MVT::i128:     return "MVT::i128";
58   case MVT::iAny:     return "MVT::iAny";
59   case MVT::fAny:     return "MVT::fAny";
60   case MVT::vAny:     return "MVT::vAny";
61   case MVT::f32:      return "MVT::f32";
62   case MVT::f64:      return "MVT::f64";
63   case MVT::f80:      return "MVT::f80";
64   case MVT::f128:     return "MVT::f128";
65   case MVT::ppcf128:  return "MVT::ppcf128";
66   case MVT::x86mmx:   return "MVT::x86mmx";
67   case MVT::Glue:     return "MVT::Glue";
68   case MVT::isVoid:   return "MVT::isVoid";
69   case MVT::v2i8:     return "MVT::v2i8";
70   case MVT::v4i8:     return "MVT::v4i8";
71   case MVT::v8i8:     return "MVT::v8i8";
72   case MVT::v16i8:    return "MVT::v16i8";
73   case MVT::v32i8:    return "MVT::v32i8";
74   case MVT::v2i16:    return "MVT::v2i16";
75   case MVT::v4i16:    return "MVT::v4i16";
76   case MVT::v8i16:    return "MVT::v8i16";
77   case MVT::v16i16:   return "MVT::v16i16";
78   case MVT::v2i32:    return "MVT::v2i32";
79   case MVT::v4i32:    return "MVT::v4i32";
80   case MVT::v8i32:    return "MVT::v8i32";
81   case MVT::v1i64:    return "MVT::v1i64";
82   case MVT::v2i64:    return "MVT::v2i64";
83   case MVT::v4i64:    return "MVT::v4i64";
84   case MVT::v8i64:    return "MVT::v8i64";
85   case MVT::v2f32:    return "MVT::v2f32";
86   case MVT::v4f32:    return "MVT::v4f32";
87   case MVT::v8f32:    return "MVT::v8f32";
88   case MVT::v2f64:    return "MVT::v2f64";
89   case MVT::v4f64:    return "MVT::v4f64";
90   case MVT::Metadata: return "MVT::Metadata";
91   case MVT::iPTR:     return "MVT::iPTR";
92   case MVT::iPTRAny:  return "MVT::iPTRAny";
93   default: assert(0 && "ILLEGAL VALUE TYPE!"); return "";
94   }
95 }
96 
97 /// getQualifiedName - Return the name of the specified record, with a
98 /// namespace qualifier if the record contains one.
99 ///
100 std::string llvm::getQualifiedName(const Record *R) {
101   std::string Namespace = R->getValueAsString("Namespace");
102   if (Namespace.empty()) return R->getName();
103   return Namespace + "::" + R->getName();
104 }
105 
106 
107 
108 
109 /// getTarget - Return the current instance of the Target class.
110 ///
111 CodeGenTarget::CodeGenTarget(RecordKeeper &records) : Records(records) {
112   std::vector<Record*> Targets = Records.getAllDerivedDefinitions("Target");
113   if (Targets.size() == 0)
114     throw std::string("ERROR: No 'Target' subclasses defined!");
115   if (Targets.size() != 1)
116     throw std::string("ERROR: Multiple subclasses of Target defined!");
117   TargetRec = Targets[0];
118 }
119 
120 
121 const std::string &CodeGenTarget::getName() const {
122   return TargetRec->getName();
123 }
124 
125 std::string CodeGenTarget::getInstNamespace() const {
126   for (inst_iterator i = inst_begin(), e = inst_end(); i != e; ++i) {
127     // Make sure not to pick up "TargetOpcode" by accidentally getting
128     // the namespace off the PHI instruction or something.
129     if ((*i)->Namespace != "TargetOpcode")
130       return (*i)->Namespace;
131   }
132 
133   return "";
134 }
135 
136 Record *CodeGenTarget::getInstructionSet() const {
137   return TargetRec->getValueAsDef("InstructionSet");
138 }
139 
140 
141 /// getAsmParser - Return the AssemblyParser definition for this target.
142 ///
143 Record *CodeGenTarget::getAsmParser() const {
144   std::vector<Record*> LI = TargetRec->getValueAsListOfDefs("AssemblyParsers");
145   if (AsmParserNum >= LI.size())
146     throw "Target does not have an AsmParser #" + utostr(AsmParserNum) + "!";
147   return LI[AsmParserNum];
148 }
149 
150 /// getAsmWriter - Return the AssemblyWriter definition for this target.
151 ///
152 Record *CodeGenTarget::getAsmWriter() const {
153   std::vector<Record*> LI = TargetRec->getValueAsListOfDefs("AssemblyWriters");
154   if (AsmWriterNum >= LI.size())
155     throw "Target does not have an AsmWriter #" + utostr(AsmWriterNum) + "!";
156   return LI[AsmWriterNum];
157 }
158 
159 void CodeGenTarget::ReadRegisters() const {
160   std::vector<Record*> Regs = Records.getAllDerivedDefinitions("Register");
161   if (Regs.empty())
162     throw std::string("No 'Register' subclasses defined!");
163   std::sort(Regs.begin(), Regs.end(), LessRecord());
164 
165   Registers.reserve(Regs.size());
166   Registers.assign(Regs.begin(), Regs.end());
167   // Assign the enumeration values.
168   for (unsigned i = 0, e = Registers.size(); i != e; ++i)
169     Registers[i].EnumValue = i + 1;
170 }
171 
172 CodeGenRegister::CodeGenRegister(Record *R) : TheDef(R) {
173   DeclaredSpillSize = R->getValueAsInt("SpillSize");
174   DeclaredSpillAlignment = R->getValueAsInt("SpillAlignment");
175   CostPerUse = R->getValueAsInt("CostPerUse");
176 }
177 
178 const std::string &CodeGenRegister::getName() const {
179   return TheDef->getName();
180 }
181 
182 void CodeGenTarget::ReadSubRegIndices() const {
183   SubRegIndices = Records.getAllDerivedDefinitions("SubRegIndex");
184   std::sort(SubRegIndices.begin(), SubRegIndices.end(), LessRecord());
185 }
186 
187 void CodeGenTarget::ReadRegisterClasses() const {
188   std::vector<Record*> RegClasses =
189     Records.getAllDerivedDefinitions("RegisterClass");
190   if (RegClasses.empty())
191     throw std::string("No 'RegisterClass' subclasses defined!");
192 
193   RegisterClasses.reserve(RegClasses.size());
194   RegisterClasses.assign(RegClasses.begin(), RegClasses.end());
195 }
196 
197 /// getRegisterByName - If there is a register with the specific AsmName,
198 /// return it.
199 const CodeGenRegister *CodeGenTarget::getRegisterByName(StringRef Name) const {
200   const std::vector<CodeGenRegister> &Regs = getRegisters();
201   for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
202     const CodeGenRegister &Reg = Regs[i];
203     if (Reg.TheDef->getValueAsString("AsmName") == Name)
204       return &Reg;
205   }
206 
207   return 0;
208 }
209 
210 std::vector<MVT::SimpleValueType> CodeGenTarget::
211 getRegisterVTs(Record *R) const {
212   std::vector<MVT::SimpleValueType> Result;
213   const std::vector<CodeGenRegisterClass> &RCs = getRegisterClasses();
214   for (unsigned i = 0, e = RCs.size(); i != e; ++i) {
215     const CodeGenRegisterClass &RC = RegisterClasses[i];
216     for (unsigned ei = 0, ee = RC.Elements.size(); ei != ee; ++ei) {
217       if (R == RC.Elements[ei]) {
218         const std::vector<MVT::SimpleValueType> &InVTs = RC.getValueTypes();
219         Result.insert(Result.end(), InVTs.begin(), InVTs.end());
220       }
221     }
222   }
223 
224   // Remove duplicates.
225   array_pod_sort(Result.begin(), Result.end());
226   Result.erase(std::unique(Result.begin(), Result.end()), Result.end());
227   return Result;
228 }
229 
230 
231 CodeGenRegisterClass::CodeGenRegisterClass(Record *R) : TheDef(R) {
232   // Rename anonymous register classes.
233   if (R->getName().size() > 9 && R->getName()[9] == '.') {
234     static unsigned AnonCounter = 0;
235     R->setName("AnonRegClass_"+utostr(AnonCounter++));
236   }
237 
238   std::vector<Record*> TypeList = R->getValueAsListOfDefs("RegTypes");
239   for (unsigned i = 0, e = TypeList.size(); i != e; ++i) {
240     Record *Type = TypeList[i];
241     if (!Type->isSubClassOf("ValueType"))
242       throw "RegTypes list member '" + Type->getName() +
243         "' does not derive from the ValueType class!";
244     VTs.push_back(getValueType(Type));
245   }
246   assert(!VTs.empty() && "RegisterClass must contain at least one ValueType!");
247 
248   std::vector<Record*> RegList = R->getValueAsListOfDefs("MemberList");
249   for (unsigned i = 0, e = RegList.size(); i != e; ++i) {
250     Record *Reg = RegList[i];
251     if (!Reg->isSubClassOf("Register"))
252       throw "Register Class member '" + Reg->getName() +
253             "' does not derive from the Register class!";
254     Elements.push_back(Reg);
255   }
256 
257   // SubRegClasses is a list<dag> containing (RC, subregindex, ...) dags.
258   ListInit *SRC = R->getValueAsListInit("SubRegClasses");
259   for (ListInit::const_iterator i = SRC->begin(), e = SRC->end(); i != e; ++i) {
260     DagInit *DAG = dynamic_cast<DagInit*>(*i);
261     if (!DAG) throw "SubRegClasses must contain DAGs";
262     DefInit *DAGOp = dynamic_cast<DefInit*>(DAG->getOperator());
263     Record *RCRec;
264     if (!DAGOp || !(RCRec = DAGOp->getDef())->isSubClassOf("RegisterClass"))
265       throw "Operator '" + DAG->getOperator()->getAsString() +
266         "' in SubRegClasses is not a RegisterClass";
267     // Iterate over args, all SubRegIndex instances.
268     for (DagInit::const_arg_iterator ai = DAG->arg_begin(), ae = DAG->arg_end();
269          ai != ae; ++ai) {
270       DefInit *Idx = dynamic_cast<DefInit*>(*ai);
271       Record *IdxRec;
272       if (!Idx || !(IdxRec = Idx->getDef())->isSubClassOf("SubRegIndex"))
273         throw "Argument '" + (*ai)->getAsString() +
274           "' in SubRegClasses is not a SubRegIndex";
275       if (!SubRegClasses.insert(std::make_pair(IdxRec, RCRec)).second)
276         throw "SubRegIndex '" + IdxRec->getName() + "' mentioned twice";
277     }
278   }
279 
280   // Allow targets to override the size in bits of the RegisterClass.
281   unsigned Size = R->getValueAsInt("Size");
282 
283   Namespace = R->getValueAsString("Namespace");
284   SpillSize = Size ? Size : EVT(VTs[0]).getSizeInBits();
285   SpillAlignment = R->getValueAsInt("Alignment");
286   CopyCost = R->getValueAsInt("CopyCost");
287   MethodBodies = R->getValueAsCode("MethodBodies");
288   MethodProtos = R->getValueAsCode("MethodProtos");
289 }
290 
291 const std::string &CodeGenRegisterClass::getName() const {
292   return TheDef->getName();
293 }
294 
295 void CodeGenTarget::ReadLegalValueTypes() const {
296   const std::vector<CodeGenRegisterClass> &RCs = getRegisterClasses();
297   for (unsigned i = 0, e = RCs.size(); i != e; ++i)
298     for (unsigned ri = 0, re = RCs[i].VTs.size(); ri != re; ++ri)
299       LegalValueTypes.push_back(RCs[i].VTs[ri]);
300 
301   // Remove duplicates.
302   std::sort(LegalValueTypes.begin(), LegalValueTypes.end());
303   LegalValueTypes.erase(std::unique(LegalValueTypes.begin(),
304                                     LegalValueTypes.end()),
305                         LegalValueTypes.end());
306 }
307 
308 
309 void CodeGenTarget::ReadInstructions() const {
310   std::vector<Record*> Insts = Records.getAllDerivedDefinitions("Instruction");
311   if (Insts.size() <= 2)
312     throw std::string("No 'Instruction' subclasses defined!");
313 
314   // Parse the instructions defined in the .td file.
315   for (unsigned i = 0, e = Insts.size(); i != e; ++i)
316     Instructions[Insts[i]] = new CodeGenInstruction(Insts[i]);
317 }
318 
319 static const CodeGenInstruction *
320 GetInstByName(const char *Name,
321               const DenseMap<const Record*, CodeGenInstruction*> &Insts,
322               RecordKeeper &Records) {
323   const Record *Rec = Records.getDef(Name);
324 
325   DenseMap<const Record*, CodeGenInstruction*>::const_iterator
326     I = Insts.find(Rec);
327   if (Rec == 0 || I == Insts.end())
328     throw std::string("Could not find '") + Name + "' instruction!";
329   return I->second;
330 }
331 
332 namespace {
333 /// SortInstByName - Sorting predicate to sort instructions by name.
334 ///
335 struct SortInstByName {
336   bool operator()(const CodeGenInstruction *Rec1,
337                   const CodeGenInstruction *Rec2) const {
338     return Rec1->TheDef->getName() < Rec2->TheDef->getName();
339   }
340 };
341 }
342 
343 /// getInstructionsByEnumValue - Return all of the instructions defined by the
344 /// target, ordered by their enum value.
345 void CodeGenTarget::ComputeInstrsByEnum() const {
346   // The ordering here must match the ordering in TargetOpcodes.h.
347   const char *const FixedInstrs[] = {
348     "PHI",
349     "INLINEASM",
350     "PROLOG_LABEL",
351     "EH_LABEL",
352     "GC_LABEL",
353     "KILL",
354     "EXTRACT_SUBREG",
355     "INSERT_SUBREG",
356     "IMPLICIT_DEF",
357     "SUBREG_TO_REG",
358     "COPY_TO_REGCLASS",
359     "DBG_VALUE",
360     "REG_SEQUENCE",
361     "COPY",
362     0
363   };
364   const DenseMap<const Record*, CodeGenInstruction*> &Insts = getInstructions();
365   for (const char *const *p = FixedInstrs; *p; ++p) {
366     const CodeGenInstruction *Instr = GetInstByName(*p, Insts, Records);
367     assert(Instr && "Missing target independent instruction");
368     assert(Instr->Namespace == "TargetOpcode" && "Bad namespace");
369     InstrsByEnum.push_back(Instr);
370   }
371   unsigned EndOfPredefines = InstrsByEnum.size();
372 
373   for (DenseMap<const Record*, CodeGenInstruction*>::const_iterator
374        I = Insts.begin(), E = Insts.end(); I != E; ++I) {
375     const CodeGenInstruction *CGI = I->second;
376     if (CGI->Namespace != "TargetOpcode")
377       InstrsByEnum.push_back(CGI);
378   }
379 
380   assert(InstrsByEnum.size() == Insts.size() && "Missing predefined instr");
381 
382   // All of the instructions are now in random order based on the map iteration.
383   // Sort them by name.
384   std::sort(InstrsByEnum.begin()+EndOfPredefines, InstrsByEnum.end(),
385             SortInstByName());
386 }
387 
388 
389 /// isLittleEndianEncoding - Return whether this target encodes its instruction
390 /// in little-endian format, i.e. bits laid out in the order [0..n]
391 ///
392 bool CodeGenTarget::isLittleEndianEncoding() const {
393   return getInstructionSet()->getValueAsBit("isLittleEndianEncoding");
394 }
395 
396 //===----------------------------------------------------------------------===//
397 // ComplexPattern implementation
398 //
399 ComplexPattern::ComplexPattern(Record *R) {
400   Ty          = ::getValueType(R->getValueAsDef("Ty"));
401   NumOperands = R->getValueAsInt("NumOperands");
402   SelectFunc  = R->getValueAsString("SelectFunc");
403   RootNodes   = R->getValueAsListOfDefs("RootNodes");
404 
405   // Parse the properties.
406   Properties = 0;
407   std::vector<Record*> PropList = R->getValueAsListOfDefs("Properties");
408   for (unsigned i = 0, e = PropList.size(); i != e; ++i)
409     if (PropList[i]->getName() == "SDNPHasChain") {
410       Properties |= 1 << SDNPHasChain;
411     } else if (PropList[i]->getName() == "SDNPOptInGlue") {
412       Properties |= 1 << SDNPOptInGlue;
413     } else if (PropList[i]->getName() == "SDNPMayStore") {
414       Properties |= 1 << SDNPMayStore;
415     } else if (PropList[i]->getName() == "SDNPMayLoad") {
416       Properties |= 1 << SDNPMayLoad;
417     } else if (PropList[i]->getName() == "SDNPSideEffect") {
418       Properties |= 1 << SDNPSideEffect;
419     } else if (PropList[i]->getName() == "SDNPMemOperand") {
420       Properties |= 1 << SDNPMemOperand;
421     } else if (PropList[i]->getName() == "SDNPVariadic") {
422       Properties |= 1 << SDNPVariadic;
423     } else if (PropList[i]->getName() == "SDNPWantRoot") {
424       Properties |= 1 << SDNPWantRoot;
425     } else if (PropList[i]->getName() == "SDNPWantParent") {
426       Properties |= 1 << SDNPWantParent;
427     } else {
428       errs() << "Unsupported SD Node property '" << PropList[i]->getName()
429              << "' on ComplexPattern '" << R->getName() << "'!\n";
430       exit(1);
431     }
432 }
433 
434 //===----------------------------------------------------------------------===//
435 // CodeGenIntrinsic Implementation
436 //===----------------------------------------------------------------------===//
437 
438 std::vector<CodeGenIntrinsic> llvm::LoadIntrinsics(const RecordKeeper &RC,
439                                                    bool TargetOnly) {
440   std::vector<Record*> I = RC.getAllDerivedDefinitions("Intrinsic");
441 
442   std::vector<CodeGenIntrinsic> Result;
443 
444   for (unsigned i = 0, e = I.size(); i != e; ++i) {
445     bool isTarget = I[i]->getValueAsBit("isTarget");
446     if (isTarget == TargetOnly)
447       Result.push_back(CodeGenIntrinsic(I[i]));
448   }
449   return Result;
450 }
451 
452 CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
453   TheDef = R;
454   std::string DefName = R->getName();
455   ModRef = ReadWriteMem;
456   isOverloaded = false;
457   isCommutative = false;
458 
459   if (DefName.size() <= 4 ||
460       std::string(DefName.begin(), DefName.begin() + 4) != "int_")
461     throw "Intrinsic '" + DefName + "' does not start with 'int_'!";
462 
463   EnumName = std::string(DefName.begin()+4, DefName.end());
464 
465   if (R->getValue("GCCBuiltinName"))  // Ignore a missing GCCBuiltinName field.
466     GCCBuiltinName = R->getValueAsString("GCCBuiltinName");
467 
468   TargetPrefix = R->getValueAsString("TargetPrefix");
469   Name = R->getValueAsString("LLVMName");
470 
471   if (Name == "") {
472     // If an explicit name isn't specified, derive one from the DefName.
473     Name = "llvm.";
474 
475     for (unsigned i = 0, e = EnumName.size(); i != e; ++i)
476       Name += (EnumName[i] == '_') ? '.' : EnumName[i];
477   } else {
478     // Verify it starts with "llvm.".
479     if (Name.size() <= 5 ||
480         std::string(Name.begin(), Name.begin() + 5) != "llvm.")
481       throw "Intrinsic '" + DefName + "'s name does not start with 'llvm.'!";
482   }
483 
484   // If TargetPrefix is specified, make sure that Name starts with
485   // "llvm.<targetprefix>.".
486   if (!TargetPrefix.empty()) {
487     if (Name.size() < 6+TargetPrefix.size() ||
488         std::string(Name.begin() + 5, Name.begin() + 6 + TargetPrefix.size())
489         != (TargetPrefix + "."))
490       throw "Intrinsic '" + DefName + "' does not start with 'llvm." +
491         TargetPrefix + ".'!";
492   }
493 
494   // Parse the list of return types.
495   std::vector<MVT::SimpleValueType> OverloadedVTs;
496   ListInit *TypeList = R->getValueAsListInit("RetTypes");
497   for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
498     Record *TyEl = TypeList->getElementAsRecord(i);
499     assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
500     MVT::SimpleValueType VT;
501     if (TyEl->isSubClassOf("LLVMMatchType")) {
502       unsigned MatchTy = TyEl->getValueAsInt("Number");
503       assert(MatchTy < OverloadedVTs.size() &&
504              "Invalid matching number!");
505       VT = OverloadedVTs[MatchTy];
506       // It only makes sense to use the extended and truncated vector element
507       // variants with iAny types; otherwise, if the intrinsic is not
508       // overloaded, all the types can be specified directly.
509       assert(((!TyEl->isSubClassOf("LLVMExtendedElementVectorType") &&
510                !TyEl->isSubClassOf("LLVMTruncatedElementVectorType")) ||
511               VT == MVT::iAny || VT == MVT::vAny) &&
512              "Expected iAny or vAny type");
513     } else {
514       VT = getValueType(TyEl->getValueAsDef("VT"));
515     }
516     if (EVT(VT).isOverloaded()) {
517       OverloadedVTs.push_back(VT);
518       isOverloaded = true;
519     }
520 
521     // Reject invalid types.
522     if (VT == MVT::isVoid)
523       throw "Intrinsic '" + DefName + " has void in result type list!";
524 
525     IS.RetVTs.push_back(VT);
526     IS.RetTypeDefs.push_back(TyEl);
527   }
528 
529   // Parse the list of parameter types.
530   TypeList = R->getValueAsListInit("ParamTypes");
531   for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
532     Record *TyEl = TypeList->getElementAsRecord(i);
533     assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
534     MVT::SimpleValueType VT;
535     if (TyEl->isSubClassOf("LLVMMatchType")) {
536       unsigned MatchTy = TyEl->getValueAsInt("Number");
537       assert(MatchTy < OverloadedVTs.size() &&
538              "Invalid matching number!");
539       VT = OverloadedVTs[MatchTy];
540       // It only makes sense to use the extended and truncated vector element
541       // variants with iAny types; otherwise, if the intrinsic is not
542       // overloaded, all the types can be specified directly.
543       assert(((!TyEl->isSubClassOf("LLVMExtendedElementVectorType") &&
544                !TyEl->isSubClassOf("LLVMTruncatedElementVectorType")) ||
545               VT == MVT::iAny || VT == MVT::vAny) &&
546              "Expected iAny or vAny type");
547     } else
548       VT = getValueType(TyEl->getValueAsDef("VT"));
549 
550     if (EVT(VT).isOverloaded()) {
551       OverloadedVTs.push_back(VT);
552       isOverloaded = true;
553     }
554 
555     // Reject invalid types.
556     if (VT == MVT::isVoid && i != e-1 /*void at end means varargs*/)
557       throw "Intrinsic '" + DefName + " has void in result type list!";
558 
559     IS.ParamVTs.push_back(VT);
560     IS.ParamTypeDefs.push_back(TyEl);
561   }
562 
563   // Parse the intrinsic properties.
564   ListInit *PropList = R->getValueAsListInit("Properties");
565   for (unsigned i = 0, e = PropList->getSize(); i != e; ++i) {
566     Record *Property = PropList->getElementAsRecord(i);
567     assert(Property->isSubClassOf("IntrinsicProperty") &&
568            "Expected a property!");
569 
570     if (Property->getName() == "IntrNoMem")
571       ModRef = NoMem;
572     else if (Property->getName() == "IntrReadArgMem")
573       ModRef = ReadArgMem;
574     else if (Property->getName() == "IntrReadMem")
575       ModRef = ReadMem;
576     else if (Property->getName() == "IntrReadWriteArgMem")
577       ModRef = ReadWriteArgMem;
578     else if (Property->getName() == "Commutative")
579       isCommutative = true;
580     else if (Property->isSubClassOf("NoCapture")) {
581       unsigned ArgNo = Property->getValueAsInt("ArgNo");
582       ArgumentAttributes.push_back(std::make_pair(ArgNo, NoCapture));
583     } else
584       assert(0 && "Unknown property!");
585   }
586 }
587