1 //===- CodeGenTarget.cpp - CodeGen Target Class Wrapper -------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
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 abort on error conditions.
15 //===----------------------------------------------------------------------===//
17 #include "CodeGenTarget.h"
18 #include "CodeGenIntrinsics.h"
19 #include "CodeGenSchedule.h"
20 #include "llvm/ADT/STLExtras.h"
21 #include "llvm/ADT/StringExtras.h"
22 #include "llvm/Support/CommandLine.h"
23 #include "llvm/TableGen/Error.h"
24 #include "llvm/TableGen/Record.h"
28 static cl::opt<unsigned>
29 AsmParserNum("asmparsernum", cl::init(0),
30 cl::desc("Make -gen-asm-parser emit assembly parser #N"));
32 static cl::opt<unsigned>
33 AsmWriterNum("asmwriternum", cl::init(0),
34 cl::desc("Make -gen-asm-writer emit assembly writer #N"));
36 /// getValueType - Return the MVT::SimpleValueType that the specified TableGen
37 /// record corresponds to.
38 MVT::SimpleValueType llvm::getValueType(Record *Rec) {
39 return (MVT::SimpleValueType)Rec->getValueAsInt("Value");
42 std::string llvm::getName(MVT::SimpleValueType T) {
44 case MVT::Other: return "UNKNOWN";
45 case MVT::iPTR: return "TLI.getPointerTy()";
46 case MVT::iPTRAny: return "TLI.getPointerTy()";
47 default: return getEnumName(T);
51 std::string llvm::getEnumName(MVT::SimpleValueType T) {
53 case MVT::Other: return "MVT::Other";
54 case MVT::i1: return "MVT::i1";
55 case MVT::i8: return "MVT::i8";
56 case MVT::i16: return "MVT::i16";
57 case MVT::i32: return "MVT::i32";
58 case MVT::i64: return "MVT::i64";
59 case MVT::i128: return "MVT::i128";
60 case MVT::iAny: return "MVT::iAny";
61 case MVT::fAny: return "MVT::fAny";
62 case MVT::vAny: return "MVT::vAny";
63 case MVT::f16: return "MVT::f16";
64 case MVT::f32: return "MVT::f32";
65 case MVT::f64: return "MVT::f64";
66 case MVT::f80: return "MVT::f80";
67 case MVT::f128: return "MVT::f128";
68 case MVT::ppcf128: return "MVT::ppcf128";
69 case MVT::x86mmx: return "MVT::x86mmx";
70 case MVT::Glue: return "MVT::Glue";
71 case MVT::isVoid: return "MVT::isVoid";
72 case MVT::v2i1: return "MVT::v2i1";
73 case MVT::v4i1: return "MVT::v4i1";
74 case MVT::v8i1: return "MVT::v8i1";
75 case MVT::v16i1: return "MVT::v16i1";
76 case MVT::v32i1: return "MVT::v32i1";
77 case MVT::v64i1: return "MVT::v64i1";
78 case MVT::v1i8: return "MVT::v1i8";
79 case MVT::v2i8: return "MVT::v2i8";
80 case MVT::v4i8: return "MVT::v4i8";
81 case MVT::v8i8: return "MVT::v8i8";
82 case MVT::v16i8: return "MVT::v16i8";
83 case MVT::v32i8: return "MVT::v32i8";
84 case MVT::v64i8: return "MVT::v64i8";
85 case MVT::v1i16: return "MVT::v1i16";
86 case MVT::v2i16: return "MVT::v2i16";
87 case MVT::v4i16: return "MVT::v4i16";
88 case MVT::v8i16: return "MVT::v8i16";
89 case MVT::v16i16: return "MVT::v16i16";
90 case MVT::v32i16: return "MVT::v32i16";
91 case MVT::v1i32: return "MVT::v1i32";
92 case MVT::v2i32: return "MVT::v2i32";
93 case MVT::v4i32: return "MVT::v4i32";
94 case MVT::v8i32: return "MVT::v8i32";
95 case MVT::v16i32: return "MVT::v16i32";
96 case MVT::v1i64: return "MVT::v1i64";
97 case MVT::v2i64: return "MVT::v2i64";
98 case MVT::v4i64: return "MVT::v4i64";
99 case MVT::v8i64: return "MVT::v8i64";
100 case MVT::v16i64: return "MVT::v16i64";
101 case MVT::v2f16: return "MVT::v2f16";
102 case MVT::v4f16: return "MVT::v4f16";
103 case MVT::v8f16: return "MVT::v8f16";
104 case MVT::v1f32: return "MVT::v1f32";
105 case MVT::v2f32: return "MVT::v2f32";
106 case MVT::v4f32: return "MVT::v4f32";
107 case MVT::v8f32: return "MVT::v8f32";
108 case MVT::v16f32: return "MVT::v16f32";
109 case MVT::v1f64: return "MVT::v1f64";
110 case MVT::v2f64: return "MVT::v2f64";
111 case MVT::v4f64: return "MVT::v4f64";
112 case MVT::v8f64: return "MVT::v8f64";
113 case MVT::Metadata: return "MVT::Metadata";
114 case MVT::iPTR: return "MVT::iPTR";
115 case MVT::iPTRAny: return "MVT::iPTRAny";
116 case MVT::Untyped: return "MVT::Untyped";
117 default: llvm_unreachable("ILLEGAL VALUE TYPE!");
121 /// getQualifiedName - Return the name of the specified record, with a
122 /// namespace qualifier if the record contains one.
124 std::string llvm::getQualifiedName(const Record *R) {
125 std::string Namespace;
126 if (R->getValue("Namespace"))
127 Namespace = R->getValueAsString("Namespace");
128 if (Namespace.empty()) return R->getName();
129 return Namespace + "::" + R->getName();
133 /// getTarget - Return the current instance of the Target class.
135 CodeGenTarget::CodeGenTarget(RecordKeeper &records)
136 : Records(records), RegBank(0), SchedModels(0) {
137 std::vector<Record*> Targets = Records.getAllDerivedDefinitions("Target");
138 if (Targets.size() == 0)
139 PrintFatalError("ERROR: No 'Target' subclasses defined!");
140 if (Targets.size() != 1)
141 PrintFatalError("ERROR: Multiple subclasses of Target defined!");
142 TargetRec = Targets[0];
145 CodeGenTarget::~CodeGenTarget() {
146 DeleteContainerSeconds(Instructions);
151 const std::string &CodeGenTarget::getName() const {
152 return TargetRec->getName();
155 std::string CodeGenTarget::getInstNamespace() const {
156 for (inst_iterator i = inst_begin(), e = inst_end(); i != e; ++i) {
157 // Make sure not to pick up "TargetOpcode" by accidentally getting
158 // the namespace off the PHI instruction or something.
159 if ((*i)->Namespace != "TargetOpcode")
160 return (*i)->Namespace;
166 Record *CodeGenTarget::getInstructionSet() const {
167 return TargetRec->getValueAsDef("InstructionSet");
171 /// getAsmParser - Return the AssemblyParser definition for this target.
173 Record *CodeGenTarget::getAsmParser() const {
174 std::vector<Record*> LI = TargetRec->getValueAsListOfDefs("AssemblyParsers");
175 if (AsmParserNum >= LI.size())
176 PrintFatalError("Target does not have an AsmParser #" +
177 Twine(AsmParserNum) + "!");
178 return LI[AsmParserNum];
181 /// getAsmParserVariant - Return the AssmblyParserVariant definition for
184 Record *CodeGenTarget::getAsmParserVariant(unsigned i) const {
185 std::vector<Record*> LI =
186 TargetRec->getValueAsListOfDefs("AssemblyParserVariants");
188 PrintFatalError("Target does not have an AsmParserVariant #" + Twine(i) +
193 /// getAsmParserVariantCount - Return the AssmblyParserVariant definition
194 /// available for this target.
196 unsigned CodeGenTarget::getAsmParserVariantCount() const {
197 std::vector<Record*> LI =
198 TargetRec->getValueAsListOfDefs("AssemblyParserVariants");
202 /// getAsmWriter - Return the AssemblyWriter definition for this target.
204 Record *CodeGenTarget::getAsmWriter() const {
205 std::vector<Record*> LI = TargetRec->getValueAsListOfDefs("AssemblyWriters");
206 if (AsmWriterNum >= LI.size())
207 PrintFatalError("Target does not have an AsmWriter #" +
208 Twine(AsmWriterNum) + "!");
209 return LI[AsmWriterNum];
212 CodeGenRegBank &CodeGenTarget::getRegBank() const {
214 RegBank = new CodeGenRegBank(Records);
218 void CodeGenTarget::ReadRegAltNameIndices() const {
219 RegAltNameIndices = Records.getAllDerivedDefinitions("RegAltNameIndex");
220 std::sort(RegAltNameIndices.begin(), RegAltNameIndices.end(), LessRecord());
223 /// getRegisterByName - If there is a register with the specific AsmName,
225 const CodeGenRegister *CodeGenTarget::getRegisterByName(StringRef Name) const {
226 const StringMap<CodeGenRegister*> &Regs = getRegBank().getRegistersByName();
227 StringMap<CodeGenRegister*>::const_iterator I = Regs.find(Name);
233 std::vector<MVT::SimpleValueType> CodeGenTarget::
234 getRegisterVTs(Record *R) const {
235 const CodeGenRegister *Reg = getRegBank().getReg(R);
236 std::vector<MVT::SimpleValueType> Result;
237 ArrayRef<CodeGenRegisterClass*> RCs = getRegBank().getRegClasses();
238 for (unsigned i = 0, e = RCs.size(); i != e; ++i) {
239 const CodeGenRegisterClass &RC = *RCs[i];
240 if (RC.contains(Reg)) {
241 ArrayRef<MVT::SimpleValueType> InVTs = RC.getValueTypes();
242 Result.insert(Result.end(), InVTs.begin(), InVTs.end());
246 // Remove duplicates.
247 array_pod_sort(Result.begin(), Result.end());
248 Result.erase(std::unique(Result.begin(), Result.end()), Result.end());
253 void CodeGenTarget::ReadLegalValueTypes() const {
254 ArrayRef<CodeGenRegisterClass*> RCs = getRegBank().getRegClasses();
255 for (unsigned i = 0, e = RCs.size(); i != e; ++i)
256 for (unsigned ri = 0, re = RCs[i]->VTs.size(); ri != re; ++ri)
257 LegalValueTypes.push_back(RCs[i]->VTs[ri]);
259 // Remove duplicates.
260 std::sort(LegalValueTypes.begin(), LegalValueTypes.end());
261 LegalValueTypes.erase(std::unique(LegalValueTypes.begin(),
262 LegalValueTypes.end()),
263 LegalValueTypes.end());
266 CodeGenSchedModels &CodeGenTarget::getSchedModels() const {
268 SchedModels = new CodeGenSchedModels(Records, *this);
272 void CodeGenTarget::ReadInstructions() const {
273 std::vector<Record*> Insts = Records.getAllDerivedDefinitions("Instruction");
274 if (Insts.size() <= 2)
275 PrintFatalError("No 'Instruction' subclasses defined!");
277 // Parse the instructions defined in the .td file.
278 for (unsigned i = 0, e = Insts.size(); i != e; ++i)
279 Instructions[Insts[i]] = new CodeGenInstruction(Insts[i]);
282 static const CodeGenInstruction *
283 GetInstByName(const char *Name,
284 const DenseMap<const Record*, CodeGenInstruction*> &Insts,
285 RecordKeeper &Records) {
286 const Record *Rec = Records.getDef(Name);
288 DenseMap<const Record*, CodeGenInstruction*>::const_iterator
290 if (Rec == 0 || I == Insts.end())
291 PrintFatalError(Twine("Could not find '") + Name + "' instruction!");
295 /// \brief Return all of the instructions defined by the target, ordered by
296 /// their enum value.
297 void CodeGenTarget::ComputeInstrsByEnum() const {
298 // The ordering here must match the ordering in TargetOpcodes.h.
299 static const char *const FixedInstrs[] = {
300 "PHI", "INLINEASM", "CFI_INSTRUCTION", "EH_LABEL",
301 "GC_LABEL", "KILL", "EXTRACT_SUBREG", "INSERT_SUBREG",
302 "IMPLICIT_DEF", "SUBREG_TO_REG", "COPY_TO_REGCLASS", "DBG_VALUE",
303 "REG_SEQUENCE", "COPY", "BUNDLE", "LIFETIME_START",
304 "LIFETIME_END", "STACKMAP", "PATCHPOINT", 0};
305 const DenseMap<const Record*, CodeGenInstruction*> &Insts = getInstructions();
306 for (const char *const *p = FixedInstrs; *p; ++p) {
307 const CodeGenInstruction *Instr = GetInstByName(*p, Insts, Records);
308 assert(Instr && "Missing target independent instruction");
309 assert(Instr->Namespace == "TargetOpcode" && "Bad namespace");
310 InstrsByEnum.push_back(Instr);
312 unsigned EndOfPredefines = InstrsByEnum.size();
314 for (DenseMap<const Record*, CodeGenInstruction*>::const_iterator
315 I = Insts.begin(), E = Insts.end(); I != E; ++I) {
316 const CodeGenInstruction *CGI = I->second;
317 if (CGI->Namespace != "TargetOpcode")
318 InstrsByEnum.push_back(CGI);
321 assert(InstrsByEnum.size() == Insts.size() && "Missing predefined instr");
323 // All of the instructions are now in random order based on the map iteration.
324 // Sort them by name.
325 std::sort(InstrsByEnum.begin() + EndOfPredefines, InstrsByEnum.end(),
326 [](const CodeGenInstruction *Rec1, const CodeGenInstruction *Rec2) {
327 return Rec1->TheDef->getName() < Rec2->TheDef->getName();
332 /// isLittleEndianEncoding - Return whether this target encodes its instruction
333 /// in little-endian format, i.e. bits laid out in the order [0..n]
335 bool CodeGenTarget::isLittleEndianEncoding() const {
336 return getInstructionSet()->getValueAsBit("isLittleEndianEncoding");
339 /// reverseBitsForLittleEndianEncoding - For little-endian instruction bit
340 /// encodings, reverse the bit order of all instructions.
341 void CodeGenTarget::reverseBitsForLittleEndianEncoding() {
342 if (!isLittleEndianEncoding())
345 std::vector<Record*> Insts = Records.getAllDerivedDefinitions("Instruction");
346 for (std::vector<Record*>::iterator I = Insts.begin(), E = Insts.end();
349 if (R->getValueAsString("Namespace") == "TargetOpcode" ||
350 R->getValueAsBit("isPseudo"))
353 BitsInit *BI = R->getValueAsBitsInit("Inst");
355 unsigned numBits = BI->getNumBits();
357 SmallVector<Init *, 16> NewBits(numBits);
359 for (unsigned bit = 0, end = numBits / 2; bit != end; ++bit) {
360 unsigned bitSwapIdx = numBits - bit - 1;
361 Init *OrigBit = BI->getBit(bit);
362 Init *BitSwap = BI->getBit(bitSwapIdx);
363 NewBits[bit] = BitSwap;
364 NewBits[bitSwapIdx] = OrigBit;
367 unsigned middle = (numBits + 1) / 2;
368 NewBits[middle] = BI->getBit(middle);
371 BitsInit *NewBI = BitsInit::get(NewBits);
373 // Update the bits in reversed order so that emitInstrOpBits will get the
374 // correct endianness.
375 R->getValue("Inst")->setValue(NewBI);
379 /// guessInstructionProperties - Return true if it's OK to guess instruction
380 /// properties instead of raising an error.
382 /// This is configurable as a temporary migration aid. It will eventually be
383 /// permanently false.
384 bool CodeGenTarget::guessInstructionProperties() const {
385 return getInstructionSet()->getValueAsBit("guessInstructionProperties");
388 //===----------------------------------------------------------------------===//
389 // ComplexPattern implementation
391 ComplexPattern::ComplexPattern(Record *R) {
392 Ty = ::getValueType(R->getValueAsDef("Ty"));
393 NumOperands = R->getValueAsInt("NumOperands");
394 SelectFunc = R->getValueAsString("SelectFunc");
395 RootNodes = R->getValueAsListOfDefs("RootNodes");
397 // Parse the properties.
399 std::vector<Record*> PropList = R->getValueAsListOfDefs("Properties");
400 for (unsigned i = 0, e = PropList.size(); i != e; ++i)
401 if (PropList[i]->getName() == "SDNPHasChain") {
402 Properties |= 1 << SDNPHasChain;
403 } else if (PropList[i]->getName() == "SDNPOptInGlue") {
404 Properties |= 1 << SDNPOptInGlue;
405 } else if (PropList[i]->getName() == "SDNPMayStore") {
406 Properties |= 1 << SDNPMayStore;
407 } else if (PropList[i]->getName() == "SDNPMayLoad") {
408 Properties |= 1 << SDNPMayLoad;
409 } else if (PropList[i]->getName() == "SDNPSideEffect") {
410 Properties |= 1 << SDNPSideEffect;
411 } else if (PropList[i]->getName() == "SDNPMemOperand") {
412 Properties |= 1 << SDNPMemOperand;
413 } else if (PropList[i]->getName() == "SDNPVariadic") {
414 Properties |= 1 << SDNPVariadic;
415 } else if (PropList[i]->getName() == "SDNPWantRoot") {
416 Properties |= 1 << SDNPWantRoot;
417 } else if (PropList[i]->getName() == "SDNPWantParent") {
418 Properties |= 1 << SDNPWantParent;
420 errs() << "Unsupported SD Node property '" << PropList[i]->getName()
421 << "' on ComplexPattern '" << R->getName() << "'!\n";
426 //===----------------------------------------------------------------------===//
427 // CodeGenIntrinsic Implementation
428 //===----------------------------------------------------------------------===//
430 std::vector<CodeGenIntrinsic> llvm::LoadIntrinsics(const RecordKeeper &RC,
432 std::vector<Record*> I = RC.getAllDerivedDefinitions("Intrinsic");
434 std::vector<CodeGenIntrinsic> Result;
436 for (unsigned i = 0, e = I.size(); i != e; ++i) {
437 bool isTarget = I[i]->getValueAsBit("isTarget");
438 if (isTarget == TargetOnly)
439 Result.push_back(CodeGenIntrinsic(I[i]));
444 CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
446 std::string DefName = R->getName();
447 ModRef = ReadWriteMem;
448 isOverloaded = false;
449 isCommutative = false;
452 isNoDuplicate = false;
454 if (DefName.size() <= 4 ||
455 std::string(DefName.begin(), DefName.begin() + 4) != "int_")
456 PrintFatalError("Intrinsic '" + DefName + "' does not start with 'int_'!");
458 EnumName = std::string(DefName.begin()+4, DefName.end());
460 if (R->getValue("GCCBuiltinName")) // Ignore a missing GCCBuiltinName field.
461 GCCBuiltinName = R->getValueAsString("GCCBuiltinName");
463 TargetPrefix = R->getValueAsString("TargetPrefix");
464 Name = R->getValueAsString("LLVMName");
467 // If an explicit name isn't specified, derive one from the DefName.
470 for (unsigned i = 0, e = EnumName.size(); i != e; ++i)
471 Name += (EnumName[i] == '_') ? '.' : EnumName[i];
473 // Verify it starts with "llvm.".
474 if (Name.size() <= 5 ||
475 std::string(Name.begin(), Name.begin() + 5) != "llvm.")
476 PrintFatalError("Intrinsic '" + DefName + "'s name does not start with 'llvm.'!");
479 // If TargetPrefix is specified, make sure that Name starts with
480 // "llvm.<targetprefix>.".
481 if (!TargetPrefix.empty()) {
482 if (Name.size() < 6+TargetPrefix.size() ||
483 std::string(Name.begin() + 5, Name.begin() + 6 + TargetPrefix.size())
484 != (TargetPrefix + "."))
485 PrintFatalError("Intrinsic '" + DefName + "' does not start with 'llvm." +
486 TargetPrefix + ".'!");
489 // Parse the list of return types.
490 std::vector<MVT::SimpleValueType> OverloadedVTs;
491 ListInit *TypeList = R->getValueAsListInit("RetTypes");
492 for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
493 Record *TyEl = TypeList->getElementAsRecord(i);
494 assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
495 MVT::SimpleValueType VT;
496 if (TyEl->isSubClassOf("LLVMMatchType")) {
497 unsigned MatchTy = TyEl->getValueAsInt("Number");
498 assert(MatchTy < OverloadedVTs.size() &&
499 "Invalid matching number!");
500 VT = OverloadedVTs[MatchTy];
501 // It only makes sense to use the extended and truncated vector element
502 // variants with iAny types; otherwise, if the intrinsic is not
503 // overloaded, all the types can be specified directly.
504 assert(((!TyEl->isSubClassOf("LLVMExtendedType") &&
505 !TyEl->isSubClassOf("LLVMTruncatedType")) ||
506 VT == MVT::iAny || VT == MVT::vAny) &&
507 "Expected iAny or vAny type");
509 VT = getValueType(TyEl->getValueAsDef("VT"));
511 if (MVT(VT).isOverloaded()) {
512 OverloadedVTs.push_back(VT);
516 // Reject invalid types.
517 if (VT == MVT::isVoid)
518 PrintFatalError("Intrinsic '" + DefName + " has void in result type list!");
520 IS.RetVTs.push_back(VT);
521 IS.RetTypeDefs.push_back(TyEl);
524 // Parse the list of parameter types.
525 TypeList = R->getValueAsListInit("ParamTypes");
526 for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
527 Record *TyEl = TypeList->getElementAsRecord(i);
528 assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
529 MVT::SimpleValueType VT;
530 if (TyEl->isSubClassOf("LLVMMatchType")) {
531 unsigned MatchTy = TyEl->getValueAsInt("Number");
532 assert(MatchTy < OverloadedVTs.size() &&
533 "Invalid matching number!");
534 VT = OverloadedVTs[MatchTy];
535 // It only makes sense to use the extended and truncated vector element
536 // variants with iAny types; otherwise, if the intrinsic is not
537 // overloaded, all the types can be specified directly.
538 assert(((!TyEl->isSubClassOf("LLVMExtendedType") &&
539 !TyEl->isSubClassOf("LLVMTruncatedType")) ||
540 VT == MVT::iAny || VT == MVT::vAny) &&
541 "Expected iAny or vAny type");
543 VT = getValueType(TyEl->getValueAsDef("VT"));
545 if (MVT(VT).isOverloaded()) {
546 OverloadedVTs.push_back(VT);
550 // Reject invalid types.
551 if (VT == MVT::isVoid && i != e-1 /*void at end means varargs*/)
552 PrintFatalError("Intrinsic '" + DefName + " has void in result type list!");
554 IS.ParamVTs.push_back(VT);
555 IS.ParamTypeDefs.push_back(TyEl);
558 // Parse the intrinsic properties.
559 ListInit *PropList = R->getValueAsListInit("Properties");
560 for (unsigned i = 0, e = PropList->getSize(); i != e; ++i) {
561 Record *Property = PropList->getElementAsRecord(i);
562 assert(Property->isSubClassOf("IntrinsicProperty") &&
563 "Expected a property!");
565 if (Property->getName() == "IntrNoMem")
567 else if (Property->getName() == "IntrReadArgMem")
569 else if (Property->getName() == "IntrReadMem")
571 else if (Property->getName() == "IntrReadWriteArgMem")
572 ModRef = ReadWriteArgMem;
573 else if (Property->getName() == "Commutative")
574 isCommutative = true;
575 else if (Property->getName() == "Throws")
577 else if (Property->getName() == "IntrNoDuplicate")
578 isNoDuplicate = true;
579 else if (Property->getName() == "IntrNoReturn")
581 else if (Property->isSubClassOf("NoCapture")) {
582 unsigned ArgNo = Property->getValueAsInt("ArgNo");
583 ArgumentAttributes.push_back(std::make_pair(ArgNo, NoCapture));
584 } else if (Property->isSubClassOf("ReadOnly")) {
585 unsigned ArgNo = Property->getValueAsInt("ArgNo");
586 ArgumentAttributes.push_back(std::make_pair(ArgNo, ReadOnly));
587 } else if (Property->isSubClassOf("ReadNone")) {
588 unsigned ArgNo = Property->getValueAsInt("ArgNo");
589 ArgumentAttributes.push_back(std::make_pair(ArgNo, ReadNone));
591 llvm_unreachable("Unknown property!");
594 // Sort the argument attributes for later benefit.
595 std::sort(ArgumentAttributes.begin(), ArgumentAttributes.end());