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 throw exceptions on error conditions.
15 //===----------------------------------------------------------------------===//
17 #include "CodeGenTarget.h"
18 #include "CodeGenIntrinsics.h"
20 #include "llvm/ADT/StringExtras.h"
21 #include "llvm/ADT/STLExtras.h"
22 #include "llvm/Support/CommandLine.h"
26 static cl::opt<unsigned>
27 AsmParserNum("asmparsernum", cl::init(0),
28 cl::desc("Make -gen-asm-parser emit assembly parser #N"));
30 static cl::opt<unsigned>
31 AsmWriterNum("asmwriternum", cl::init(0),
32 cl::desc("Make -gen-asm-writer emit assembly writer #N"));
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");
40 std::string llvm::getName(MVT::SimpleValueType 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);
49 std::string llvm::getEnumName(MVT::SimpleValueType 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 "";
97 /// getQualifiedName - Return the name of the specified record, with a
98 /// namespace qualifier if the record contains one.
100 std::string llvm::getQualifiedName(const Record *R) {
101 std::string Namespace;
102 if (R->getValue("Namespace"))
103 Namespace = R->getValueAsString("Namespace");
104 if (Namespace.empty()) return R->getName();
105 return Namespace + "::" + R->getName();
109 /// getTarget - Return the current instance of the Target class.
111 CodeGenTarget::CodeGenTarget(RecordKeeper &records)
112 : Records(records), RegBank(0) {
113 std::vector<Record*> Targets = Records.getAllDerivedDefinitions("Target");
114 if (Targets.size() == 0)
115 throw std::string("ERROR: No 'Target' subclasses defined!");
116 if (Targets.size() != 1)
117 throw std::string("ERROR: Multiple subclasses of Target defined!");
118 TargetRec = Targets[0];
122 const std::string &CodeGenTarget::getName() const {
123 return TargetRec->getName();
126 std::string CodeGenTarget::getInstNamespace() const {
127 for (inst_iterator i = inst_begin(), e = inst_end(); i != e; ++i) {
128 // Make sure not to pick up "TargetOpcode" by accidentally getting
129 // the namespace off the PHI instruction or something.
130 if ((*i)->Namespace != "TargetOpcode")
131 return (*i)->Namespace;
137 Record *CodeGenTarget::getInstructionSet() const {
138 return TargetRec->getValueAsDef("InstructionSet");
142 /// getAsmParser - Return the AssemblyParser definition for this target.
144 Record *CodeGenTarget::getAsmParser() const {
145 std::vector<Record*> LI = TargetRec->getValueAsListOfDefs("AssemblyParsers");
146 if (AsmParserNum >= LI.size())
147 throw "Target does not have an AsmParser #" + utostr(AsmParserNum) + "!";
148 return LI[AsmParserNum];
151 /// getAsmWriter - Return the AssemblyWriter definition for this target.
153 Record *CodeGenTarget::getAsmWriter() const {
154 std::vector<Record*> LI = TargetRec->getValueAsListOfDefs("AssemblyWriters");
155 if (AsmWriterNum >= LI.size())
156 throw "Target does not have an AsmWriter #" + utostr(AsmWriterNum) + "!";
157 return LI[AsmWriterNum];
160 CodeGenRegBank &CodeGenTarget::getRegBank() const {
162 RegBank = new CodeGenRegBank(Records);
166 void CodeGenTarget::ReadRegisters() const {
167 std::vector<Record*> Regs = Records.getAllDerivedDefinitions("Register");
169 throw std::string("No 'Register' subclasses defined!");
170 std::sort(Regs.begin(), Regs.end(), LessRecord());
172 Registers.reserve(Regs.size());
173 Registers.assign(Regs.begin(), Regs.end());
174 // Assign the enumeration values.
175 for (unsigned i = 0, e = Registers.size(); i != e; ++i)
176 Registers[i].EnumValue = i + 1;
179 void CodeGenTarget::ReadRegisterClasses() const {
180 std::vector<Record*> RegClasses =
181 Records.getAllDerivedDefinitions("RegisterClass");
182 if (RegClasses.empty())
183 throw std::string("No 'RegisterClass' subclasses defined!");
185 RegisterClasses.reserve(RegClasses.size());
186 RegisterClasses.assign(RegClasses.begin(), RegClasses.end());
189 /// getRegisterByName - If there is a register with the specific AsmName,
191 const CodeGenRegister *CodeGenTarget::getRegisterByName(StringRef Name) const {
192 const std::vector<CodeGenRegister> &Regs = getRegisters();
193 for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
194 const CodeGenRegister &Reg = Regs[i];
195 if (Reg.TheDef->getValueAsString("AsmName") == Name)
202 std::vector<MVT::SimpleValueType> CodeGenTarget::
203 getRegisterVTs(Record *R) const {
204 std::vector<MVT::SimpleValueType> Result;
205 const std::vector<CodeGenRegisterClass> &RCs = getRegisterClasses();
206 for (unsigned i = 0, e = RCs.size(); i != e; ++i) {
207 const CodeGenRegisterClass &RC = RegisterClasses[i];
208 for (unsigned ei = 0, ee = RC.Elements.size(); ei != ee; ++ei) {
209 if (R == RC.Elements[ei]) {
210 const std::vector<MVT::SimpleValueType> &InVTs = RC.getValueTypes();
211 Result.insert(Result.end(), InVTs.begin(), InVTs.end());
216 // Remove duplicates.
217 array_pod_sort(Result.begin(), Result.end());
218 Result.erase(std::unique(Result.begin(), Result.end()), Result.end());
223 void CodeGenTarget::ReadLegalValueTypes() const {
224 const std::vector<CodeGenRegisterClass> &RCs = getRegisterClasses();
225 for (unsigned i = 0, e = RCs.size(); i != e; ++i)
226 for (unsigned ri = 0, re = RCs[i].VTs.size(); ri != re; ++ri)
227 LegalValueTypes.push_back(RCs[i].VTs[ri]);
229 // Remove duplicates.
230 std::sort(LegalValueTypes.begin(), LegalValueTypes.end());
231 LegalValueTypes.erase(std::unique(LegalValueTypes.begin(),
232 LegalValueTypes.end()),
233 LegalValueTypes.end());
237 void CodeGenTarget::ReadInstructions() const {
238 std::vector<Record*> Insts = Records.getAllDerivedDefinitions("Instruction");
239 if (Insts.size() <= 2)
240 throw std::string("No 'Instruction' subclasses defined!");
242 // Parse the instructions defined in the .td file.
243 for (unsigned i = 0, e = Insts.size(); i != e; ++i)
244 Instructions[Insts[i]] = new CodeGenInstruction(Insts[i]);
247 static const CodeGenInstruction *
248 GetInstByName(const char *Name,
249 const DenseMap<const Record*, CodeGenInstruction*> &Insts,
250 RecordKeeper &Records) {
251 const Record *Rec = Records.getDef(Name);
253 DenseMap<const Record*, CodeGenInstruction*>::const_iterator
255 if (Rec == 0 || I == Insts.end())
256 throw std::string("Could not find '") + Name + "' instruction!";
261 /// SortInstByName - Sorting predicate to sort instructions by name.
263 struct SortInstByName {
264 bool operator()(const CodeGenInstruction *Rec1,
265 const CodeGenInstruction *Rec2) const {
266 return Rec1->TheDef->getName() < Rec2->TheDef->getName();
271 /// getInstructionsByEnumValue - Return all of the instructions defined by the
272 /// target, ordered by their enum value.
273 void CodeGenTarget::ComputeInstrsByEnum() const {
274 // The ordering here must match the ordering in TargetOpcodes.h.
275 const char *const FixedInstrs[] = {
292 const DenseMap<const Record*, CodeGenInstruction*> &Insts = getInstructions();
293 for (const char *const *p = FixedInstrs; *p; ++p) {
294 const CodeGenInstruction *Instr = GetInstByName(*p, Insts, Records);
295 assert(Instr && "Missing target independent instruction");
296 assert(Instr->Namespace == "TargetOpcode" && "Bad namespace");
297 InstrsByEnum.push_back(Instr);
299 unsigned EndOfPredefines = InstrsByEnum.size();
301 for (DenseMap<const Record*, CodeGenInstruction*>::const_iterator
302 I = Insts.begin(), E = Insts.end(); I != E; ++I) {
303 const CodeGenInstruction *CGI = I->second;
304 if (CGI->Namespace != "TargetOpcode")
305 InstrsByEnum.push_back(CGI);
308 assert(InstrsByEnum.size() == Insts.size() && "Missing predefined instr");
310 // All of the instructions are now in random order based on the map iteration.
311 // Sort them by name.
312 std::sort(InstrsByEnum.begin()+EndOfPredefines, InstrsByEnum.end(),
317 /// isLittleEndianEncoding - Return whether this target encodes its instruction
318 /// in little-endian format, i.e. bits laid out in the order [0..n]
320 bool CodeGenTarget::isLittleEndianEncoding() const {
321 return getInstructionSet()->getValueAsBit("isLittleEndianEncoding");
324 //===----------------------------------------------------------------------===//
325 // ComplexPattern implementation
327 ComplexPattern::ComplexPattern(Record *R) {
328 Ty = ::getValueType(R->getValueAsDef("Ty"));
329 NumOperands = R->getValueAsInt("NumOperands");
330 SelectFunc = R->getValueAsString("SelectFunc");
331 RootNodes = R->getValueAsListOfDefs("RootNodes");
333 // Parse the properties.
335 std::vector<Record*> PropList = R->getValueAsListOfDefs("Properties");
336 for (unsigned i = 0, e = PropList.size(); i != e; ++i)
337 if (PropList[i]->getName() == "SDNPHasChain") {
338 Properties |= 1 << SDNPHasChain;
339 } else if (PropList[i]->getName() == "SDNPOptInGlue") {
340 Properties |= 1 << SDNPOptInGlue;
341 } else if (PropList[i]->getName() == "SDNPMayStore") {
342 Properties |= 1 << SDNPMayStore;
343 } else if (PropList[i]->getName() == "SDNPMayLoad") {
344 Properties |= 1 << SDNPMayLoad;
345 } else if (PropList[i]->getName() == "SDNPSideEffect") {
346 Properties |= 1 << SDNPSideEffect;
347 } else if (PropList[i]->getName() == "SDNPMemOperand") {
348 Properties |= 1 << SDNPMemOperand;
349 } else if (PropList[i]->getName() == "SDNPVariadic") {
350 Properties |= 1 << SDNPVariadic;
351 } else if (PropList[i]->getName() == "SDNPWantRoot") {
352 Properties |= 1 << SDNPWantRoot;
353 } else if (PropList[i]->getName() == "SDNPWantParent") {
354 Properties |= 1 << SDNPWantParent;
356 errs() << "Unsupported SD Node property '" << PropList[i]->getName()
357 << "' on ComplexPattern '" << R->getName() << "'!\n";
362 //===----------------------------------------------------------------------===//
363 // CodeGenIntrinsic Implementation
364 //===----------------------------------------------------------------------===//
366 std::vector<CodeGenIntrinsic> llvm::LoadIntrinsics(const RecordKeeper &RC,
368 std::vector<Record*> I = RC.getAllDerivedDefinitions("Intrinsic");
370 std::vector<CodeGenIntrinsic> Result;
372 for (unsigned i = 0, e = I.size(); i != e; ++i) {
373 bool isTarget = I[i]->getValueAsBit("isTarget");
374 if (isTarget == TargetOnly)
375 Result.push_back(CodeGenIntrinsic(I[i]));
380 CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
382 std::string DefName = R->getName();
383 ModRef = ReadWriteMem;
384 isOverloaded = false;
385 isCommutative = false;
388 if (DefName.size() <= 4 ||
389 std::string(DefName.begin(), DefName.begin() + 4) != "int_")
390 throw "Intrinsic '" + DefName + "' does not start with 'int_'!";
392 EnumName = std::string(DefName.begin()+4, DefName.end());
394 if (R->getValue("GCCBuiltinName")) // Ignore a missing GCCBuiltinName field.
395 GCCBuiltinName = R->getValueAsString("GCCBuiltinName");
397 TargetPrefix = R->getValueAsString("TargetPrefix");
398 Name = R->getValueAsString("LLVMName");
401 // If an explicit name isn't specified, derive one from the DefName.
404 for (unsigned i = 0, e = EnumName.size(); i != e; ++i)
405 Name += (EnumName[i] == '_') ? '.' : EnumName[i];
407 // Verify it starts with "llvm.".
408 if (Name.size() <= 5 ||
409 std::string(Name.begin(), Name.begin() + 5) != "llvm.")
410 throw "Intrinsic '" + DefName + "'s name does not start with 'llvm.'!";
413 // If TargetPrefix is specified, make sure that Name starts with
414 // "llvm.<targetprefix>.".
415 if (!TargetPrefix.empty()) {
416 if (Name.size() < 6+TargetPrefix.size() ||
417 std::string(Name.begin() + 5, Name.begin() + 6 + TargetPrefix.size())
418 != (TargetPrefix + "."))
419 throw "Intrinsic '" + DefName + "' does not start with 'llvm." +
420 TargetPrefix + ".'!";
423 // Parse the list of return types.
424 std::vector<MVT::SimpleValueType> OverloadedVTs;
425 ListInit *TypeList = R->getValueAsListInit("RetTypes");
426 for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
427 Record *TyEl = TypeList->getElementAsRecord(i);
428 assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
429 MVT::SimpleValueType VT;
430 if (TyEl->isSubClassOf("LLVMMatchType")) {
431 unsigned MatchTy = TyEl->getValueAsInt("Number");
432 assert(MatchTy < OverloadedVTs.size() &&
433 "Invalid matching number!");
434 VT = OverloadedVTs[MatchTy];
435 // It only makes sense to use the extended and truncated vector element
436 // variants with iAny types; otherwise, if the intrinsic is not
437 // overloaded, all the types can be specified directly.
438 assert(((!TyEl->isSubClassOf("LLVMExtendedElementVectorType") &&
439 !TyEl->isSubClassOf("LLVMTruncatedElementVectorType")) ||
440 VT == MVT::iAny || VT == MVT::vAny) &&
441 "Expected iAny or vAny type");
443 VT = getValueType(TyEl->getValueAsDef("VT"));
445 if (EVT(VT).isOverloaded()) {
446 OverloadedVTs.push_back(VT);
450 // Reject invalid types.
451 if (VT == MVT::isVoid)
452 throw "Intrinsic '" + DefName + " has void in result type list!";
454 IS.RetVTs.push_back(VT);
455 IS.RetTypeDefs.push_back(TyEl);
458 // Parse the list of parameter types.
459 TypeList = R->getValueAsListInit("ParamTypes");
460 for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
461 Record *TyEl = TypeList->getElementAsRecord(i);
462 assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
463 MVT::SimpleValueType VT;
464 if (TyEl->isSubClassOf("LLVMMatchType")) {
465 unsigned MatchTy = TyEl->getValueAsInt("Number");
466 assert(MatchTy < OverloadedVTs.size() &&
467 "Invalid matching number!");
468 VT = OverloadedVTs[MatchTy];
469 // It only makes sense to use the extended and truncated vector element
470 // variants with iAny types; otherwise, if the intrinsic is not
471 // overloaded, all the types can be specified directly.
472 assert(((!TyEl->isSubClassOf("LLVMExtendedElementVectorType") &&
473 !TyEl->isSubClassOf("LLVMTruncatedElementVectorType")) ||
474 VT == MVT::iAny || VT == MVT::vAny) &&
475 "Expected iAny or vAny type");
477 VT = getValueType(TyEl->getValueAsDef("VT"));
479 if (EVT(VT).isOverloaded()) {
480 OverloadedVTs.push_back(VT);
484 // Reject invalid types.
485 if (VT == MVT::isVoid && i != e-1 /*void at end means varargs*/)
486 throw "Intrinsic '" + DefName + " has void in result type list!";
488 IS.ParamVTs.push_back(VT);
489 IS.ParamTypeDefs.push_back(TyEl);
492 // Parse the intrinsic properties.
493 ListInit *PropList = R->getValueAsListInit("Properties");
494 for (unsigned i = 0, e = PropList->getSize(); i != e; ++i) {
495 Record *Property = PropList->getElementAsRecord(i);
496 assert(Property->isSubClassOf("IntrinsicProperty") &&
497 "Expected a property!");
499 if (Property->getName() == "IntrNoMem")
501 else if (Property->getName() == "IntrReadArgMem")
503 else if (Property->getName() == "IntrReadMem")
505 else if (Property->getName() == "IntrReadWriteArgMem")
506 ModRef = ReadWriteArgMem;
507 else if (Property->getName() == "Commutative")
508 isCommutative = true;
509 else if (Property->getName() == "Throws")
511 else if (Property->isSubClassOf("NoCapture")) {
512 unsigned ArgNo = Property->getValueAsInt("ArgNo");
513 ArgumentAttributes.push_back(std::make_pair(ArgNo, NoCapture));
515 assert(0 && "Unknown property!");
518 // Sort the argument attributes for later benefit.
519 std::sort(ArgumentAttributes.begin(), ArgumentAttributes.end());