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   CostPerUse = R->getValueAsInt("CostPerUse");
174 }
175 
176 const std::string &CodeGenRegister::getName() const {
177   return TheDef->getName();
178 }
179 
180 void CodeGenTarget::ReadSubRegIndices() const {
181   SubRegIndices = Records.getAllDerivedDefinitions("SubRegIndex");
182   std::sort(SubRegIndices.begin(), SubRegIndices.end(), LessRecord());
183 }
184 
185 void CodeGenTarget::ReadRegisterClasses() const {
186   std::vector<Record*> RegClasses =
187     Records.getAllDerivedDefinitions("RegisterClass");
188   if (RegClasses.empty())
189     throw std::string("No 'RegisterClass' subclasses defined!");
190 
191   RegisterClasses.reserve(RegClasses.size());
192   RegisterClasses.assign(RegClasses.begin(), RegClasses.end());
193 }
194 
195 /// getRegisterByName - If there is a register with the specific AsmName,
196 /// return it.
197 const CodeGenRegister *CodeGenTarget::getRegisterByName(StringRef Name) const {
198   const std::vector<CodeGenRegister> &Regs = getRegisters();
199   for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
200     const CodeGenRegister &Reg = Regs[i];
201     if (Reg.TheDef->getValueAsString("AsmName") == Name)
202       return &Reg;
203   }
204 
205   return 0;
206 }
207 
208 std::vector<MVT::SimpleValueType> CodeGenTarget::
209 getRegisterVTs(Record *R) const {
210   std::vector<MVT::SimpleValueType> Result;
211   const std::vector<CodeGenRegisterClass> &RCs = getRegisterClasses();
212   for (unsigned i = 0, e = RCs.size(); i != e; ++i) {
213     const CodeGenRegisterClass &RC = RegisterClasses[i];
214     for (unsigned ei = 0, ee = RC.Elements.size(); ei != ee; ++ei) {
215       if (R == RC.Elements[ei]) {
216         const std::vector<MVT::SimpleValueType> &InVTs = RC.getValueTypes();
217         Result.insert(Result.end(), InVTs.begin(), InVTs.end());
218       }
219     }
220   }
221 
222   // Remove duplicates.
223   array_pod_sort(Result.begin(), Result.end());
224   Result.erase(std::unique(Result.begin(), Result.end()), Result.end());
225   return Result;
226 }
227 
228 
229 CodeGenRegisterClass::CodeGenRegisterClass(Record *R) : TheDef(R) {
230   // Rename anonymous register classes.
231   if (R->getName().size() > 9 && R->getName()[9] == '.') {
232     static unsigned AnonCounter = 0;
233     R->setName("AnonRegClass_"+utostr(AnonCounter++));
234   }
235 
236   std::vector<Record*> TypeList = R->getValueAsListOfDefs("RegTypes");
237   for (unsigned i = 0, e = TypeList.size(); i != e; ++i) {
238     Record *Type = TypeList[i];
239     if (!Type->isSubClassOf("ValueType"))
240       throw "RegTypes list member '" + Type->getName() +
241         "' does not derive from the ValueType class!";
242     VTs.push_back(getValueType(Type));
243   }
244   assert(!VTs.empty() && "RegisterClass must contain at least one ValueType!");
245 
246   std::vector<Record*> RegList = R->getValueAsListOfDefs("MemberList");
247   for (unsigned i = 0, e = RegList.size(); i != e; ++i) {
248     Record *Reg = RegList[i];
249     if (!Reg->isSubClassOf("Register"))
250       throw "Register Class member '" + Reg->getName() +
251             "' does not derive from the Register class!";
252     Elements.push_back(Reg);
253   }
254 
255   // SubRegClasses is a list<dag> containing (RC, subregindex, ...) dags.
256   ListInit *SRC = R->getValueAsListInit("SubRegClasses");
257   for (ListInit::const_iterator i = SRC->begin(), e = SRC->end(); i != e; ++i) {
258     DagInit *DAG = dynamic_cast<DagInit*>(*i);
259     if (!DAG) throw "SubRegClasses must contain DAGs";
260     DefInit *DAGOp = dynamic_cast<DefInit*>(DAG->getOperator());
261     Record *RCRec;
262     if (!DAGOp || !(RCRec = DAGOp->getDef())->isSubClassOf("RegisterClass"))
263       throw "Operator '" + DAG->getOperator()->getAsString() +
264         "' in SubRegClasses is not a RegisterClass";
265     // Iterate over args, all SubRegIndex instances.
266     for (DagInit::const_arg_iterator ai = DAG->arg_begin(), ae = DAG->arg_end();
267          ai != ae; ++ai) {
268       DefInit *Idx = dynamic_cast<DefInit*>(*ai);
269       Record *IdxRec;
270       if (!Idx || !(IdxRec = Idx->getDef())->isSubClassOf("SubRegIndex"))
271         throw "Argument '" + (*ai)->getAsString() +
272           "' in SubRegClasses is not a SubRegIndex";
273       if (!SubRegClasses.insert(std::make_pair(IdxRec, RCRec)).second)
274         throw "SubRegIndex '" + IdxRec->getName() + "' mentioned twice";
275     }
276   }
277 
278   // Allow targets to override the size in bits of the RegisterClass.
279   unsigned Size = R->getValueAsInt("Size");
280 
281   Namespace = R->getValueAsString("Namespace");
282   SpillSize = Size ? Size : EVT(VTs[0]).getSizeInBits();
283   SpillAlignment = R->getValueAsInt("Alignment");
284   CopyCost = R->getValueAsInt("CopyCost");
285   MethodBodies = R->getValueAsCode("MethodBodies");
286   MethodProtos = R->getValueAsCode("MethodProtos");
287 }
288 
289 const std::string &CodeGenRegisterClass::getName() const {
290   return TheDef->getName();
291 }
292 
293 void CodeGenTarget::ReadLegalValueTypes() const {
294   const std::vector<CodeGenRegisterClass> &RCs = getRegisterClasses();
295   for (unsigned i = 0, e = RCs.size(); i != e; ++i)
296     for (unsigned ri = 0, re = RCs[i].VTs.size(); ri != re; ++ri)
297       LegalValueTypes.push_back(RCs[i].VTs[ri]);
298 
299   // Remove duplicates.
300   std::sort(LegalValueTypes.begin(), LegalValueTypes.end());
301   LegalValueTypes.erase(std::unique(LegalValueTypes.begin(),
302                                     LegalValueTypes.end()),
303                         LegalValueTypes.end());
304 }
305 
306 
307 void CodeGenTarget::ReadInstructions() const {
308   std::vector<Record*> Insts = Records.getAllDerivedDefinitions("Instruction");
309   if (Insts.size() <= 2)
310     throw std::string("No 'Instruction' subclasses defined!");
311 
312   // Parse the instructions defined in the .td file.
313   for (unsigned i = 0, e = Insts.size(); i != e; ++i)
314     Instructions[Insts[i]] = new CodeGenInstruction(Insts[i]);
315 }
316 
317 static const CodeGenInstruction *
318 GetInstByName(const char *Name,
319               const DenseMap<const Record*, CodeGenInstruction*> &Insts,
320               RecordKeeper &Records) {
321   const Record *Rec = Records.getDef(Name);
322 
323   DenseMap<const Record*, CodeGenInstruction*>::const_iterator
324     I = Insts.find(Rec);
325   if (Rec == 0 || I == Insts.end())
326     throw std::string("Could not find '") + Name + "' instruction!";
327   return I->second;
328 }
329 
330 namespace {
331 /// SortInstByName - Sorting predicate to sort instructions by name.
332 ///
333 struct SortInstByName {
334   bool operator()(const CodeGenInstruction *Rec1,
335                   const CodeGenInstruction *Rec2) const {
336     return Rec1->TheDef->getName() < Rec2->TheDef->getName();
337   }
338 };
339 }
340 
341 /// getInstructionsByEnumValue - Return all of the instructions defined by the
342 /// target, ordered by their enum value.
343 void CodeGenTarget::ComputeInstrsByEnum() const {
344   // The ordering here must match the ordering in TargetOpcodes.h.
345   const char *const FixedInstrs[] = {
346     "PHI",
347     "INLINEASM",
348     "PROLOG_LABEL",
349     "EH_LABEL",
350     "GC_LABEL",
351     "KILL",
352     "EXTRACT_SUBREG",
353     "INSERT_SUBREG",
354     "IMPLICIT_DEF",
355     "SUBREG_TO_REG",
356     "COPY_TO_REGCLASS",
357     "DBG_VALUE",
358     "REG_SEQUENCE",
359     "COPY",
360     0
361   };
362   const DenseMap<const Record*, CodeGenInstruction*> &Insts = getInstructions();
363   for (const char *const *p = FixedInstrs; *p; ++p) {
364     const CodeGenInstruction *Instr = GetInstByName(*p, Insts, Records);
365     assert(Instr && "Missing target independent instruction");
366     assert(Instr->Namespace == "TargetOpcode" && "Bad namespace");
367     InstrsByEnum.push_back(Instr);
368   }
369   unsigned EndOfPredefines = InstrsByEnum.size();
370 
371   for (DenseMap<const Record*, CodeGenInstruction*>::const_iterator
372        I = Insts.begin(), E = Insts.end(); I != E; ++I) {
373     const CodeGenInstruction *CGI = I->second;
374     if (CGI->Namespace != "TargetOpcode")
375       InstrsByEnum.push_back(CGI);
376   }
377 
378   assert(InstrsByEnum.size() == Insts.size() && "Missing predefined instr");
379 
380   // All of the instructions are now in random order based on the map iteration.
381   // Sort them by name.
382   std::sort(InstrsByEnum.begin()+EndOfPredefines, InstrsByEnum.end(),
383             SortInstByName());
384 }
385 
386 
387 /// isLittleEndianEncoding - Return whether this target encodes its instruction
388 /// in little-endian format, i.e. bits laid out in the order [0..n]
389 ///
390 bool CodeGenTarget::isLittleEndianEncoding() const {
391   return getInstructionSet()->getValueAsBit("isLittleEndianEncoding");
392 }
393 
394 //===----------------------------------------------------------------------===//
395 // ComplexPattern implementation
396 //
397 ComplexPattern::ComplexPattern(Record *R) {
398   Ty          = ::getValueType(R->getValueAsDef("Ty"));
399   NumOperands = R->getValueAsInt("NumOperands");
400   SelectFunc  = R->getValueAsString("SelectFunc");
401   RootNodes   = R->getValueAsListOfDefs("RootNodes");
402 
403   // Parse the properties.
404   Properties = 0;
405   std::vector<Record*> PropList = R->getValueAsListOfDefs("Properties");
406   for (unsigned i = 0, e = PropList.size(); i != e; ++i)
407     if (PropList[i]->getName() == "SDNPHasChain") {
408       Properties |= 1 << SDNPHasChain;
409     } else if (PropList[i]->getName() == "SDNPOptInGlue") {
410       Properties |= 1 << SDNPOptInGlue;
411     } else if (PropList[i]->getName() == "SDNPMayStore") {
412       Properties |= 1 << SDNPMayStore;
413     } else if (PropList[i]->getName() == "SDNPMayLoad") {
414       Properties |= 1 << SDNPMayLoad;
415     } else if (PropList[i]->getName() == "SDNPSideEffect") {
416       Properties |= 1 << SDNPSideEffect;
417     } else if (PropList[i]->getName() == "SDNPMemOperand") {
418       Properties |= 1 << SDNPMemOperand;
419     } else if (PropList[i]->getName() == "SDNPVariadic") {
420       Properties |= 1 << SDNPVariadic;
421     } else if (PropList[i]->getName() == "SDNPWantRoot") {
422       Properties |= 1 << SDNPWantRoot;
423     } else if (PropList[i]->getName() == "SDNPWantParent") {
424       Properties |= 1 << SDNPWantParent;
425     } else {
426       errs() << "Unsupported SD Node property '" << PropList[i]->getName()
427              << "' on ComplexPattern '" << R->getName() << "'!\n";
428       exit(1);
429     }
430 }
431 
432 //===----------------------------------------------------------------------===//
433 // CodeGenIntrinsic Implementation
434 //===----------------------------------------------------------------------===//
435 
436 std::vector<CodeGenIntrinsic> llvm::LoadIntrinsics(const RecordKeeper &RC,
437                                                    bool TargetOnly) {
438   std::vector<Record*> I = RC.getAllDerivedDefinitions("Intrinsic");
439 
440   std::vector<CodeGenIntrinsic> Result;
441 
442   for (unsigned i = 0, e = I.size(); i != e; ++i) {
443     bool isTarget = I[i]->getValueAsBit("isTarget");
444     if (isTarget == TargetOnly)
445       Result.push_back(CodeGenIntrinsic(I[i]));
446   }
447   return Result;
448 }
449 
450 CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
451   TheDef = R;
452   std::string DefName = R->getName();
453   ModRef = ReadWriteMem;
454   isOverloaded = false;
455   isCommutative = false;
456 
457   if (DefName.size() <= 4 ||
458       std::string(DefName.begin(), DefName.begin() + 4) != "int_")
459     throw "Intrinsic '" + DefName + "' does not start with 'int_'!";
460 
461   EnumName = std::string(DefName.begin()+4, DefName.end());
462 
463   if (R->getValue("GCCBuiltinName"))  // Ignore a missing GCCBuiltinName field.
464     GCCBuiltinName = R->getValueAsString("GCCBuiltinName");
465 
466   TargetPrefix = R->getValueAsString("TargetPrefix");
467   Name = R->getValueAsString("LLVMName");
468 
469   if (Name == "") {
470     // If an explicit name isn't specified, derive one from the DefName.
471     Name = "llvm.";
472 
473     for (unsigned i = 0, e = EnumName.size(); i != e; ++i)
474       Name += (EnumName[i] == '_') ? '.' : EnumName[i];
475   } else {
476     // Verify it starts with "llvm.".
477     if (Name.size() <= 5 ||
478         std::string(Name.begin(), Name.begin() + 5) != "llvm.")
479       throw "Intrinsic '" + DefName + "'s name does not start with 'llvm.'!";
480   }
481 
482   // If TargetPrefix is specified, make sure that Name starts with
483   // "llvm.<targetprefix>.".
484   if (!TargetPrefix.empty()) {
485     if (Name.size() < 6+TargetPrefix.size() ||
486         std::string(Name.begin() + 5, Name.begin() + 6 + TargetPrefix.size())
487         != (TargetPrefix + "."))
488       throw "Intrinsic '" + DefName + "' does not start with 'llvm." +
489         TargetPrefix + ".'!";
490   }
491 
492   // Parse the list of return types.
493   std::vector<MVT::SimpleValueType> OverloadedVTs;
494   ListInit *TypeList = R->getValueAsListInit("RetTypes");
495   for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
496     Record *TyEl = TypeList->getElementAsRecord(i);
497     assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
498     MVT::SimpleValueType VT;
499     if (TyEl->isSubClassOf("LLVMMatchType")) {
500       unsigned MatchTy = TyEl->getValueAsInt("Number");
501       assert(MatchTy < OverloadedVTs.size() &&
502              "Invalid matching number!");
503       VT = OverloadedVTs[MatchTy];
504       // It only makes sense to use the extended and truncated vector element
505       // variants with iAny types; otherwise, if the intrinsic is not
506       // overloaded, all the types can be specified directly.
507       assert(((!TyEl->isSubClassOf("LLVMExtendedElementVectorType") &&
508                !TyEl->isSubClassOf("LLVMTruncatedElementVectorType")) ||
509               VT == MVT::iAny || VT == MVT::vAny) &&
510              "Expected iAny or vAny type");
511     } else {
512       VT = getValueType(TyEl->getValueAsDef("VT"));
513     }
514     if (EVT(VT).isOverloaded()) {
515       OverloadedVTs.push_back(VT);
516       isOverloaded = true;
517     }
518 
519     // Reject invalid types.
520     if (VT == MVT::isVoid)
521       throw "Intrinsic '" + DefName + " has void in result type list!";
522 
523     IS.RetVTs.push_back(VT);
524     IS.RetTypeDefs.push_back(TyEl);
525   }
526 
527   // Parse the list of parameter types.
528   TypeList = R->getValueAsListInit("ParamTypes");
529   for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
530     Record *TyEl = TypeList->getElementAsRecord(i);
531     assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
532     MVT::SimpleValueType VT;
533     if (TyEl->isSubClassOf("LLVMMatchType")) {
534       unsigned MatchTy = TyEl->getValueAsInt("Number");
535       assert(MatchTy < OverloadedVTs.size() &&
536              "Invalid matching number!");
537       VT = OverloadedVTs[MatchTy];
538       // It only makes sense to use the extended and truncated vector element
539       // variants with iAny types; otherwise, if the intrinsic is not
540       // overloaded, all the types can be specified directly.
541       assert(((!TyEl->isSubClassOf("LLVMExtendedElementVectorType") &&
542                !TyEl->isSubClassOf("LLVMTruncatedElementVectorType")) ||
543               VT == MVT::iAny || VT == MVT::vAny) &&
544              "Expected iAny or vAny type");
545     } else
546       VT = getValueType(TyEl->getValueAsDef("VT"));
547 
548     if (EVT(VT).isOverloaded()) {
549       OverloadedVTs.push_back(VT);
550       isOverloaded = true;
551     }
552 
553     // Reject invalid types.
554     if (VT == MVT::isVoid && i != e-1 /*void at end means varargs*/)
555       throw "Intrinsic '" + DefName + " has void in result type list!";
556 
557     IS.ParamVTs.push_back(VT);
558     IS.ParamTypeDefs.push_back(TyEl);
559   }
560 
561   // Parse the intrinsic properties.
562   ListInit *PropList = R->getValueAsListInit("Properties");
563   for (unsigned i = 0, e = PropList->getSize(); i != e; ++i) {
564     Record *Property = PropList->getElementAsRecord(i);
565     assert(Property->isSubClassOf("IntrinsicProperty") &&
566            "Expected a property!");
567 
568     if (Property->getName() == "IntrNoMem")
569       ModRef = NoMem;
570     else if (Property->getName() == "IntrReadArgMem")
571       ModRef = ReadArgMem;
572     else if (Property->getName() == "IntrReadMem")
573       ModRef = ReadMem;
574     else if (Property->getName() == "IntrReadWriteArgMem")
575       ModRef = ReadWriteArgMem;
576     else if (Property->getName() == "Commutative")
577       isCommutative = true;
578     else if (Property->isSubClassOf("NoCapture")) {
579       unsigned ArgNo = Property->getValueAsInt("ArgNo");
580       ArgumentAttributes.push_back(std::make_pair(ArgNo, NoCapture));
581     } else
582       assert(0 && "Unknown property!");
583   }
584 }
585