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 }
176 
177 const std::string &CodeGenRegister::getName() const {
178   return TheDef->getName();
179 }
180 
181 void CodeGenTarget::ReadSubRegIndices() const {
182   SubRegIndices = Records.getAllDerivedDefinitions("SubRegIndex");
183   std::sort(SubRegIndices.begin(), SubRegIndices.end(), LessRecord());
184 }
185 
186 void CodeGenTarget::ReadRegisterClasses() const {
187   std::vector<Record*> RegClasses =
188     Records.getAllDerivedDefinitions("RegisterClass");
189   if (RegClasses.empty())
190     throw std::string("No 'RegisterClass' subclasses defined!");
191 
192   RegisterClasses.reserve(RegClasses.size());
193   RegisterClasses.assign(RegClasses.begin(), RegClasses.end());
194 }
195 
196 /// getRegisterByName - If there is a register with the specific AsmName,
197 /// return it.
198 const CodeGenRegister *CodeGenTarget::getRegisterByName(StringRef Name) const {
199   const std::vector<CodeGenRegister> &Regs = getRegisters();
200   for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
201     const CodeGenRegister &Reg = Regs[i];
202     if (Reg.TheDef->getValueAsString("AsmName") == Name)
203       return &Reg;
204   }
205 
206   return 0;
207 }
208 
209 std::vector<MVT::SimpleValueType> CodeGenTarget::
210 getRegisterVTs(Record *R) const {
211   std::vector<MVT::SimpleValueType> Result;
212   const std::vector<CodeGenRegisterClass> &RCs = getRegisterClasses();
213   for (unsigned i = 0, e = RCs.size(); i != e; ++i) {
214     const CodeGenRegisterClass &RC = RegisterClasses[i];
215     for (unsigned ei = 0, ee = RC.Elements.size(); ei != ee; ++ei) {
216       if (R == RC.Elements[ei]) {
217         const std::vector<MVT::SimpleValueType> &InVTs = RC.getValueTypes();
218         Result.insert(Result.end(), InVTs.begin(), InVTs.end());
219       }
220     }
221   }
222 
223   // Remove duplicates.
224   array_pod_sort(Result.begin(), Result.end());
225   Result.erase(std::unique(Result.begin(), Result.end()), Result.end());
226   return Result;
227 }
228 
229 
230 CodeGenRegisterClass::CodeGenRegisterClass(Record *R) : TheDef(R) {
231   // Rename anonymous register classes.
232   if (R->getName().size() > 9 && R->getName()[9] == '.') {
233     static unsigned AnonCounter = 0;
234     R->setName("AnonRegClass_"+utostr(AnonCounter++));
235   }
236 
237   std::vector<Record*> TypeList = R->getValueAsListOfDefs("RegTypes");
238   for (unsigned i = 0, e = TypeList.size(); i != e; ++i) {
239     Record *Type = TypeList[i];
240     if (!Type->isSubClassOf("ValueType"))
241       throw "RegTypes list member '" + Type->getName() +
242         "' does not derive from the ValueType class!";
243     VTs.push_back(getValueType(Type));
244   }
245   assert(!VTs.empty() && "RegisterClass must contain at least one ValueType!");
246 
247   std::vector<Record*> RegList = R->getValueAsListOfDefs("MemberList");
248   for (unsigned i = 0, e = RegList.size(); i != e; ++i) {
249     Record *Reg = RegList[i];
250     if (!Reg->isSubClassOf("Register"))
251       throw "Register Class member '" + Reg->getName() +
252             "' does not derive from the Register class!";
253     Elements.push_back(Reg);
254   }
255 
256   // SubRegClasses is a list<dag> containing (RC, subregindex, ...) dags.
257   ListInit *SRC = R->getValueAsListInit("SubRegClasses");
258   for (ListInit::const_iterator i = SRC->begin(), e = SRC->end(); i != e; ++i) {
259     DagInit *DAG = dynamic_cast<DagInit*>(*i);
260     if (!DAG) throw "SubRegClasses must contain DAGs";
261     DefInit *DAGOp = dynamic_cast<DefInit*>(DAG->getOperator());
262     Record *RCRec;
263     if (!DAGOp || !(RCRec = DAGOp->getDef())->isSubClassOf("RegisterClass"))
264       throw "Operator '" + DAG->getOperator()->getAsString() +
265         "' in SubRegClasses is not a RegisterClass";
266     // Iterate over args, all SubRegIndex instances.
267     for (DagInit::const_arg_iterator ai = DAG->arg_begin(), ae = DAG->arg_end();
268          ai != ae; ++ai) {
269       DefInit *Idx = dynamic_cast<DefInit*>(*ai);
270       Record *IdxRec;
271       if (!Idx || !(IdxRec = Idx->getDef())->isSubClassOf("SubRegIndex"))
272         throw "Argument '" + (*ai)->getAsString() +
273           "' in SubRegClasses is not a SubRegIndex";
274       if (!SubRegClasses.insert(std::make_pair(IdxRec, RCRec)).second)
275         throw "SubRegIndex '" + IdxRec->getName() + "' mentioned twice";
276     }
277   }
278 
279   // Allow targets to override the size in bits of the RegisterClass.
280   unsigned Size = R->getValueAsInt("Size");
281 
282   Namespace = R->getValueAsString("Namespace");
283   SpillSize = Size ? Size : EVT(VTs[0]).getSizeInBits();
284   SpillAlignment = R->getValueAsInt("Alignment");
285   CopyCost = R->getValueAsInt("CopyCost");
286   MethodBodies = R->getValueAsCode("MethodBodies");
287   MethodProtos = R->getValueAsCode("MethodProtos");
288 }
289 
290 const std::string &CodeGenRegisterClass::getName() const {
291   return TheDef->getName();
292 }
293 
294 void CodeGenTarget::ReadLegalValueTypes() const {
295   const std::vector<CodeGenRegisterClass> &RCs = getRegisterClasses();
296   for (unsigned i = 0, e = RCs.size(); i != e; ++i)
297     for (unsigned ri = 0, re = RCs[i].VTs.size(); ri != re; ++ri)
298       LegalValueTypes.push_back(RCs[i].VTs[ri]);
299 
300   // Remove duplicates.
301   std::sort(LegalValueTypes.begin(), LegalValueTypes.end());
302   LegalValueTypes.erase(std::unique(LegalValueTypes.begin(),
303                                     LegalValueTypes.end()),
304                         LegalValueTypes.end());
305 }
306 
307 
308 void CodeGenTarget::ReadInstructions() const {
309   std::vector<Record*> Insts = Records.getAllDerivedDefinitions("Instruction");
310   if (Insts.size() <= 2)
311     throw std::string("No 'Instruction' subclasses defined!");
312 
313   // Parse the instructions defined in the .td file.
314   for (unsigned i = 0, e = Insts.size(); i != e; ++i)
315     Instructions[Insts[i]] = new CodeGenInstruction(Insts[i]);
316 }
317 
318 static const CodeGenInstruction *
319 GetInstByName(const char *Name,
320               const DenseMap<const Record*, CodeGenInstruction*> &Insts,
321               RecordKeeper &Records) {
322   const Record *Rec = Records.getDef(Name);
323 
324   DenseMap<const Record*, CodeGenInstruction*>::const_iterator
325     I = Insts.find(Rec);
326   if (Rec == 0 || I == Insts.end())
327     throw std::string("Could not find '") + Name + "' instruction!";
328   return I->second;
329 }
330 
331 namespace {
332 /// SortInstByName - Sorting predicate to sort instructions by name.
333 ///
334 struct SortInstByName {
335   bool operator()(const CodeGenInstruction *Rec1,
336                   const CodeGenInstruction *Rec2) const {
337     return Rec1->TheDef->getName() < Rec2->TheDef->getName();
338   }
339 };
340 }
341 
342 /// getInstructionsByEnumValue - Return all of the instructions defined by the
343 /// target, ordered by their enum value.
344 void CodeGenTarget::ComputeInstrsByEnum() const {
345   // The ordering here must match the ordering in TargetOpcodes.h.
346   const char *const FixedInstrs[] = {
347     "PHI",
348     "INLINEASM",
349     "PROLOG_LABEL",
350     "EH_LABEL",
351     "GC_LABEL",
352     "KILL",
353     "EXTRACT_SUBREG",
354     "INSERT_SUBREG",
355     "IMPLICIT_DEF",
356     "SUBREG_TO_REG",
357     "COPY_TO_REGCLASS",
358     "DBG_VALUE",
359     "REG_SEQUENCE",
360     "COPY",
361     0
362   };
363   const DenseMap<const Record*, CodeGenInstruction*> &Insts = getInstructions();
364   for (const char *const *p = FixedInstrs; *p; ++p) {
365     const CodeGenInstruction *Instr = GetInstByName(*p, Insts, Records);
366     assert(Instr && "Missing target independent instruction");
367     assert(Instr->Namespace == "TargetOpcode" && "Bad namespace");
368     InstrsByEnum.push_back(Instr);
369   }
370   unsigned EndOfPredefines = InstrsByEnum.size();
371 
372   for (DenseMap<const Record*, CodeGenInstruction*>::const_iterator
373        I = Insts.begin(), E = Insts.end(); I != E; ++I) {
374     const CodeGenInstruction *CGI = I->second;
375     if (CGI->Namespace != "TargetOpcode")
376       InstrsByEnum.push_back(CGI);
377   }
378 
379   assert(InstrsByEnum.size() == Insts.size() && "Missing predefined instr");
380 
381   // All of the instructions are now in random order based on the map iteration.
382   // Sort them by name.
383   std::sort(InstrsByEnum.begin()+EndOfPredefines, InstrsByEnum.end(),
384             SortInstByName());
385 }
386 
387 
388 /// isLittleEndianEncoding - Return whether this target encodes its instruction
389 /// in little-endian format, i.e. bits laid out in the order [0..n]
390 ///
391 bool CodeGenTarget::isLittleEndianEncoding() const {
392   return getInstructionSet()->getValueAsBit("isLittleEndianEncoding");
393 }
394 
395 //===----------------------------------------------------------------------===//
396 // ComplexPattern implementation
397 //
398 ComplexPattern::ComplexPattern(Record *R) {
399   Ty          = ::getValueType(R->getValueAsDef("Ty"));
400   NumOperands = R->getValueAsInt("NumOperands");
401   SelectFunc  = R->getValueAsString("SelectFunc");
402   RootNodes   = R->getValueAsListOfDefs("RootNodes");
403 
404   // Parse the properties.
405   Properties = 0;
406   std::vector<Record*> PropList = R->getValueAsListOfDefs("Properties");
407   for (unsigned i = 0, e = PropList.size(); i != e; ++i)
408     if (PropList[i]->getName() == "SDNPHasChain") {
409       Properties |= 1 << SDNPHasChain;
410     } else if (PropList[i]->getName() == "SDNPOptInGlue") {
411       Properties |= 1 << SDNPOptInGlue;
412     } else if (PropList[i]->getName() == "SDNPMayStore") {
413       Properties |= 1 << SDNPMayStore;
414     } else if (PropList[i]->getName() == "SDNPMayLoad") {
415       Properties |= 1 << SDNPMayLoad;
416     } else if (PropList[i]->getName() == "SDNPSideEffect") {
417       Properties |= 1 << SDNPSideEffect;
418     } else if (PropList[i]->getName() == "SDNPMemOperand") {
419       Properties |= 1 << SDNPMemOperand;
420     } else if (PropList[i]->getName() == "SDNPVariadic") {
421       Properties |= 1 << SDNPVariadic;
422     } else if (PropList[i]->getName() == "SDNPWantRoot") {
423       Properties |= 1 << SDNPWantRoot;
424     } else if (PropList[i]->getName() == "SDNPWantParent") {
425       Properties |= 1 << SDNPWantParent;
426     } else {
427       errs() << "Unsupported SD Node property '" << PropList[i]->getName()
428              << "' on ComplexPattern '" << R->getName() << "'!\n";
429       exit(1);
430     }
431 }
432 
433 //===----------------------------------------------------------------------===//
434 // CodeGenIntrinsic Implementation
435 //===----------------------------------------------------------------------===//
436 
437 std::vector<CodeGenIntrinsic> llvm::LoadIntrinsics(const RecordKeeper &RC,
438                                                    bool TargetOnly) {
439   std::vector<Record*> I = RC.getAllDerivedDefinitions("Intrinsic");
440 
441   std::vector<CodeGenIntrinsic> Result;
442 
443   for (unsigned i = 0, e = I.size(); i != e; ++i) {
444     bool isTarget = I[i]->getValueAsBit("isTarget");
445     if (isTarget == TargetOnly)
446       Result.push_back(CodeGenIntrinsic(I[i]));
447   }
448   return Result;
449 }
450 
451 CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
452   TheDef = R;
453   std::string DefName = R->getName();
454   ModRef = ReadWriteMem;
455   isOverloaded = false;
456   isCommutative = false;
457 
458   if (DefName.size() <= 4 ||
459       std::string(DefName.begin(), DefName.begin() + 4) != "int_")
460     throw "Intrinsic '" + DefName + "' does not start with 'int_'!";
461 
462   EnumName = std::string(DefName.begin()+4, DefName.end());
463 
464   if (R->getValue("GCCBuiltinName"))  // Ignore a missing GCCBuiltinName field.
465     GCCBuiltinName = R->getValueAsString("GCCBuiltinName");
466 
467   TargetPrefix = R->getValueAsString("TargetPrefix");
468   Name = R->getValueAsString("LLVMName");
469 
470   if (Name == "") {
471     // If an explicit name isn't specified, derive one from the DefName.
472     Name = "llvm.";
473 
474     for (unsigned i = 0, e = EnumName.size(); i != e; ++i)
475       Name += (EnumName[i] == '_') ? '.' : EnumName[i];
476   } else {
477     // Verify it starts with "llvm.".
478     if (Name.size() <= 5 ||
479         std::string(Name.begin(), Name.begin() + 5) != "llvm.")
480       throw "Intrinsic '" + DefName + "'s name does not start with 'llvm.'!";
481   }
482 
483   // If TargetPrefix is specified, make sure that Name starts with
484   // "llvm.<targetprefix>.".
485   if (!TargetPrefix.empty()) {
486     if (Name.size() < 6+TargetPrefix.size() ||
487         std::string(Name.begin() + 5, Name.begin() + 6 + TargetPrefix.size())
488         != (TargetPrefix + "."))
489       throw "Intrinsic '" + DefName + "' does not start with 'llvm." +
490         TargetPrefix + ".'!";
491   }
492 
493   // Parse the list of return types.
494   std::vector<MVT::SimpleValueType> OverloadedVTs;
495   ListInit *TypeList = R->getValueAsListInit("RetTypes");
496   for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
497     Record *TyEl = TypeList->getElementAsRecord(i);
498     assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
499     MVT::SimpleValueType VT;
500     if (TyEl->isSubClassOf("LLVMMatchType")) {
501       unsigned MatchTy = TyEl->getValueAsInt("Number");
502       assert(MatchTy < OverloadedVTs.size() &&
503              "Invalid matching number!");
504       VT = OverloadedVTs[MatchTy];
505       // It only makes sense to use the extended and truncated vector element
506       // variants with iAny types; otherwise, if the intrinsic is not
507       // overloaded, all the types can be specified directly.
508       assert(((!TyEl->isSubClassOf("LLVMExtendedElementVectorType") &&
509                !TyEl->isSubClassOf("LLVMTruncatedElementVectorType")) ||
510               VT == MVT::iAny || VT == MVT::vAny) &&
511              "Expected iAny or vAny type");
512     } else {
513       VT = getValueType(TyEl->getValueAsDef("VT"));
514     }
515     if (EVT(VT).isOverloaded()) {
516       OverloadedVTs.push_back(VT);
517       isOverloaded = true;
518     }
519 
520     // Reject invalid types.
521     if (VT == MVT::isVoid)
522       throw "Intrinsic '" + DefName + " has void in result type list!";
523 
524     IS.RetVTs.push_back(VT);
525     IS.RetTypeDefs.push_back(TyEl);
526   }
527 
528   // Parse the list of parameter types.
529   TypeList = R->getValueAsListInit("ParamTypes");
530   for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
531     Record *TyEl = TypeList->getElementAsRecord(i);
532     assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
533     MVT::SimpleValueType VT;
534     if (TyEl->isSubClassOf("LLVMMatchType")) {
535       unsigned MatchTy = TyEl->getValueAsInt("Number");
536       assert(MatchTy < OverloadedVTs.size() &&
537              "Invalid matching number!");
538       VT = OverloadedVTs[MatchTy];
539       // It only makes sense to use the extended and truncated vector element
540       // variants with iAny types; otherwise, if the intrinsic is not
541       // overloaded, all the types can be specified directly.
542       assert(((!TyEl->isSubClassOf("LLVMExtendedElementVectorType") &&
543                !TyEl->isSubClassOf("LLVMTruncatedElementVectorType")) ||
544               VT == MVT::iAny || VT == MVT::vAny) &&
545              "Expected iAny or vAny type");
546     } else
547       VT = getValueType(TyEl->getValueAsDef("VT"));
548 
549     if (EVT(VT).isOverloaded()) {
550       OverloadedVTs.push_back(VT);
551       isOverloaded = true;
552     }
553 
554     // Reject invalid types.
555     if (VT == MVT::isVoid && i != e-1 /*void at end means varargs*/)
556       throw "Intrinsic '" + DefName + " has void in result type list!";
557 
558     IS.ParamVTs.push_back(VT);
559     IS.ParamTypeDefs.push_back(TyEl);
560   }
561 
562   // Parse the intrinsic properties.
563   ListInit *PropList = R->getValueAsListInit("Properties");
564   for (unsigned i = 0, e = PropList->getSize(); i != e; ++i) {
565     Record *Property = PropList->getElementAsRecord(i);
566     assert(Property->isSubClassOf("IntrinsicProperty") &&
567            "Expected a property!");
568 
569     if (Property->getName() == "IntrNoMem")
570       ModRef = NoMem;
571     else if (Property->getName() == "IntrReadArgMem")
572       ModRef = ReadArgMem;
573     else if (Property->getName() == "IntrReadMem")
574       ModRef = ReadMem;
575     else if (Property->getName() == "IntrReadWriteArgMem")
576       ModRef = ReadWriteArgMem;
577     else if (Property->getName() == "Commutative")
578       isCommutative = true;
579     else if (Property->isSubClassOf("NoCapture")) {
580       unsigned ArgNo = Property->getValueAsInt("ArgNo");
581       ArgumentAttributes.push_back(std::make_pair(ArgNo, NoCapture));
582     } else
583       assert(0 && "Unknown property!");
584   }
585 }
586