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 case MVT::untyped: return "MVT::untyped";
94 default: assert(0 && "ILLEGAL VALUE TYPE!"); return "";
98 /// getQualifiedName - Return the name of the specified record, with a
99 /// namespace qualifier if the record contains one.
101 std::string llvm::getQualifiedName(const Record *R) {
102 std::string Namespace;
103 if (R->getValue("Namespace"))
104 Namespace = R->getValueAsString("Namespace");
105 if (Namespace.empty()) return R->getName();
106 return Namespace + "::" + R->getName();
110 /// getTarget - Return the current instance of the Target class.
112 CodeGenTarget::CodeGenTarget(RecordKeeper &records)
113 : Records(records), RegBank(0) {
114 std::vector<Record*> Targets = Records.getAllDerivedDefinitions("Target");
115 if (Targets.size() == 0)
116 throw std::string("ERROR: No 'Target' subclasses defined!");
117 if (Targets.size() != 1)
118 throw std::string("ERROR: Multiple subclasses of Target defined!");
119 TargetRec = Targets[0];
123 const std::string &CodeGenTarget::getName() const {
124 return TargetRec->getName();
127 std::string CodeGenTarget::getInstNamespace() const {
128 for (inst_iterator i = inst_begin(), e = inst_end(); i != e; ++i) {
129 // Make sure not to pick up "TargetOpcode" by accidentally getting
130 // the namespace off the PHI instruction or something.
131 if ((*i)->Namespace != "TargetOpcode")
132 return (*i)->Namespace;
138 Record *CodeGenTarget::getInstructionSet() const {
139 return TargetRec->getValueAsDef("InstructionSet");
143 /// getAsmParser - Return the AssemblyParser definition for this target.
145 Record *CodeGenTarget::getAsmParser() const {
146 std::vector<Record*> LI = TargetRec->getValueAsListOfDefs("AssemblyParsers");
147 if (AsmParserNum >= LI.size())
148 throw "Target does not have an AsmParser #" + utostr(AsmParserNum) + "!";
149 return LI[AsmParserNum];
152 /// getAsmWriter - Return the AssemblyWriter definition for this target.
154 Record *CodeGenTarget::getAsmWriter() const {
155 std::vector<Record*> LI = TargetRec->getValueAsListOfDefs("AssemblyWriters");
156 if (AsmWriterNum >= LI.size())
157 throw "Target does not have an AsmWriter #" + utostr(AsmWriterNum) + "!";
158 return LI[AsmWriterNum];
161 CodeGenRegBank &CodeGenTarget::getRegBank() const {
163 RegBank = new CodeGenRegBank(Records);
167 /// getRegisterByName - If there is a register with the specific AsmName,
169 const CodeGenRegister *CodeGenTarget::getRegisterByName(StringRef Name) const {
170 const std::vector<CodeGenRegister*> &Regs = getRegBank().getRegisters();
171 for (unsigned i = 0, e = Regs.size(); i != e; ++i)
172 if (Regs[i]->TheDef->getValueAsString("AsmName") == Name)
178 std::vector<MVT::SimpleValueType> CodeGenTarget::
179 getRegisterVTs(Record *R) const {
180 const CodeGenRegister *Reg = getRegBank().getReg(R);
181 std::vector<MVT::SimpleValueType> Result;
182 const std::vector<CodeGenRegisterClass> &RCs = getRegisterClasses();
183 for (unsigned i = 0, e = RCs.size(); i != e; ++i) {
184 const CodeGenRegisterClass &RC = RCs[i];
185 if (RC.contains(Reg)) {
186 const std::vector<MVT::SimpleValueType> &InVTs = RC.getValueTypes();
187 Result.insert(Result.end(), InVTs.begin(), InVTs.end());
191 // Remove duplicates.
192 array_pod_sort(Result.begin(), Result.end());
193 Result.erase(std::unique(Result.begin(), Result.end()), Result.end());
198 void CodeGenTarget::ReadLegalValueTypes() const {
199 const std::vector<CodeGenRegisterClass> &RCs = getRegisterClasses();
200 for (unsigned i = 0, e = RCs.size(); i != e; ++i)
201 for (unsigned ri = 0, re = RCs[i].VTs.size(); ri != re; ++ri)
202 LegalValueTypes.push_back(RCs[i].VTs[ri]);
204 // Remove duplicates.
205 std::sort(LegalValueTypes.begin(), LegalValueTypes.end());
206 LegalValueTypes.erase(std::unique(LegalValueTypes.begin(),
207 LegalValueTypes.end()),
208 LegalValueTypes.end());
212 void CodeGenTarget::ReadInstructions() const {
213 std::vector<Record*> Insts = Records.getAllDerivedDefinitions("Instruction");
214 if (Insts.size() <= 2)
215 throw std::string("No 'Instruction' subclasses defined!");
217 // Parse the instructions defined in the .td file.
218 for (unsigned i = 0, e = Insts.size(); i != e; ++i)
219 Instructions[Insts[i]] = new CodeGenInstruction(Insts[i]);
222 static const CodeGenInstruction *
223 GetInstByName(const char *Name,
224 const DenseMap<const Record*, CodeGenInstruction*> &Insts,
225 RecordKeeper &Records) {
226 const Record *Rec = Records.getDef(Name);
228 DenseMap<const Record*, CodeGenInstruction*>::const_iterator
230 if (Rec == 0 || I == Insts.end())
231 throw std::string("Could not find '") + Name + "' instruction!";
236 /// SortInstByName - Sorting predicate to sort instructions by name.
238 struct SortInstByName {
239 bool operator()(const CodeGenInstruction *Rec1,
240 const CodeGenInstruction *Rec2) const {
241 return Rec1->TheDef->getName() < Rec2->TheDef->getName();
246 /// getInstructionsByEnumValue - Return all of the instructions defined by the
247 /// target, ordered by their enum value.
248 void CodeGenTarget::ComputeInstrsByEnum() const {
249 // The ordering here must match the ordering in TargetOpcodes.h.
250 const char *const FixedInstrs[] = {
267 const DenseMap<const Record*, CodeGenInstruction*> &Insts = getInstructions();
268 for (const char *const *p = FixedInstrs; *p; ++p) {
269 const CodeGenInstruction *Instr = GetInstByName(*p, Insts, Records);
270 assert(Instr && "Missing target independent instruction");
271 assert(Instr->Namespace == "TargetOpcode" && "Bad namespace");
272 InstrsByEnum.push_back(Instr);
274 unsigned EndOfPredefines = InstrsByEnum.size();
276 for (DenseMap<const Record*, CodeGenInstruction*>::const_iterator
277 I = Insts.begin(), E = Insts.end(); I != E; ++I) {
278 const CodeGenInstruction *CGI = I->second;
279 if (CGI->Namespace != "TargetOpcode")
280 InstrsByEnum.push_back(CGI);
283 assert(InstrsByEnum.size() == Insts.size() && "Missing predefined instr");
285 // All of the instructions are now in random order based on the map iteration.
286 // Sort them by name.
287 std::sort(InstrsByEnum.begin()+EndOfPredefines, InstrsByEnum.end(),
292 /// isLittleEndianEncoding - Return whether this target encodes its instruction
293 /// in little-endian format, i.e. bits laid out in the order [0..n]
295 bool CodeGenTarget::isLittleEndianEncoding() const {
296 return getInstructionSet()->getValueAsBit("isLittleEndianEncoding");
299 //===----------------------------------------------------------------------===//
300 // ComplexPattern implementation
302 ComplexPattern::ComplexPattern(Record *R) {
303 Ty = ::getValueType(R->getValueAsDef("Ty"));
304 NumOperands = R->getValueAsInt("NumOperands");
305 SelectFunc = R->getValueAsString("SelectFunc");
306 RootNodes = R->getValueAsListOfDefs("RootNodes");
308 // Parse the properties.
310 std::vector<Record*> PropList = R->getValueAsListOfDefs("Properties");
311 for (unsigned i = 0, e = PropList.size(); i != e; ++i)
312 if (PropList[i]->getName() == "SDNPHasChain") {
313 Properties |= 1 << SDNPHasChain;
314 } else if (PropList[i]->getName() == "SDNPOptInGlue") {
315 Properties |= 1 << SDNPOptInGlue;
316 } else if (PropList[i]->getName() == "SDNPMayStore") {
317 Properties |= 1 << SDNPMayStore;
318 } else if (PropList[i]->getName() == "SDNPMayLoad") {
319 Properties |= 1 << SDNPMayLoad;
320 } else if (PropList[i]->getName() == "SDNPSideEffect") {
321 Properties |= 1 << SDNPSideEffect;
322 } else if (PropList[i]->getName() == "SDNPMemOperand") {
323 Properties |= 1 << SDNPMemOperand;
324 } else if (PropList[i]->getName() == "SDNPVariadic") {
325 Properties |= 1 << SDNPVariadic;
326 } else if (PropList[i]->getName() == "SDNPWantRoot") {
327 Properties |= 1 << SDNPWantRoot;
328 } else if (PropList[i]->getName() == "SDNPWantParent") {
329 Properties |= 1 << SDNPWantParent;
331 errs() << "Unsupported SD Node property '" << PropList[i]->getName()
332 << "' on ComplexPattern '" << R->getName() << "'!\n";
337 //===----------------------------------------------------------------------===//
338 // CodeGenIntrinsic Implementation
339 //===----------------------------------------------------------------------===//
341 std::vector<CodeGenIntrinsic> llvm::LoadIntrinsics(const RecordKeeper &RC,
343 std::vector<Record*> I = RC.getAllDerivedDefinitions("Intrinsic");
345 std::vector<CodeGenIntrinsic> Result;
347 for (unsigned i = 0, e = I.size(); i != e; ++i) {
348 bool isTarget = I[i]->getValueAsBit("isTarget");
349 if (isTarget == TargetOnly)
350 Result.push_back(CodeGenIntrinsic(I[i]));
355 CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
357 std::string DefName = R->getName();
358 ModRef = ReadWriteMem;
359 isOverloaded = false;
360 isCommutative = false;
363 if (DefName.size() <= 4 ||
364 std::string(DefName.begin(), DefName.begin() + 4) != "int_")
365 throw "Intrinsic '" + DefName + "' does not start with 'int_'!";
367 EnumName = std::string(DefName.begin()+4, DefName.end());
369 if (R->getValue("GCCBuiltinName")) // Ignore a missing GCCBuiltinName field.
370 GCCBuiltinName = R->getValueAsString("GCCBuiltinName");
372 TargetPrefix = R->getValueAsString("TargetPrefix");
373 Name = R->getValueAsString("LLVMName");
376 // If an explicit name isn't specified, derive one from the DefName.
379 for (unsigned i = 0, e = EnumName.size(); i != e; ++i)
380 Name += (EnumName[i] == '_') ? '.' : EnumName[i];
382 // Verify it starts with "llvm.".
383 if (Name.size() <= 5 ||
384 std::string(Name.begin(), Name.begin() + 5) != "llvm.")
385 throw "Intrinsic '" + DefName + "'s name does not start with 'llvm.'!";
388 // If TargetPrefix is specified, make sure that Name starts with
389 // "llvm.<targetprefix>.".
390 if (!TargetPrefix.empty()) {
391 if (Name.size() < 6+TargetPrefix.size() ||
392 std::string(Name.begin() + 5, Name.begin() + 6 + TargetPrefix.size())
393 != (TargetPrefix + "."))
394 throw "Intrinsic '" + DefName + "' does not start with 'llvm." +
395 TargetPrefix + ".'!";
398 // Parse the list of return types.
399 std::vector<MVT::SimpleValueType> OverloadedVTs;
400 ListInit *TypeList = R->getValueAsListInit("RetTypes");
401 for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
402 Record *TyEl = TypeList->getElementAsRecord(i);
403 assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
404 MVT::SimpleValueType VT;
405 if (TyEl->isSubClassOf("LLVMMatchType")) {
406 unsigned MatchTy = TyEl->getValueAsInt("Number");
407 assert(MatchTy < OverloadedVTs.size() &&
408 "Invalid matching number!");
409 VT = OverloadedVTs[MatchTy];
410 // It only makes sense to use the extended and truncated vector element
411 // variants with iAny types; otherwise, if the intrinsic is not
412 // overloaded, all the types can be specified directly.
413 assert(((!TyEl->isSubClassOf("LLVMExtendedElementVectorType") &&
414 !TyEl->isSubClassOf("LLVMTruncatedElementVectorType")) ||
415 VT == MVT::iAny || VT == MVT::vAny) &&
416 "Expected iAny or vAny type");
418 VT = getValueType(TyEl->getValueAsDef("VT"));
420 if (EVT(VT).isOverloaded()) {
421 OverloadedVTs.push_back(VT);
425 // Reject invalid types.
426 if (VT == MVT::isVoid)
427 throw "Intrinsic '" + DefName + " has void in result type list!";
429 IS.RetVTs.push_back(VT);
430 IS.RetTypeDefs.push_back(TyEl);
433 // Parse the list of parameter types.
434 TypeList = R->getValueAsListInit("ParamTypes");
435 for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
436 Record *TyEl = TypeList->getElementAsRecord(i);
437 assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
438 MVT::SimpleValueType VT;
439 if (TyEl->isSubClassOf("LLVMMatchType")) {
440 unsigned MatchTy = TyEl->getValueAsInt("Number");
441 assert(MatchTy < OverloadedVTs.size() &&
442 "Invalid matching number!");
443 VT = OverloadedVTs[MatchTy];
444 // It only makes sense to use the extended and truncated vector element
445 // variants with iAny types; otherwise, if the intrinsic is not
446 // overloaded, all the types can be specified directly.
447 assert(((!TyEl->isSubClassOf("LLVMExtendedElementVectorType") &&
448 !TyEl->isSubClassOf("LLVMTruncatedElementVectorType")) ||
449 VT == MVT::iAny || VT == MVT::vAny) &&
450 "Expected iAny or vAny type");
452 VT = getValueType(TyEl->getValueAsDef("VT"));
454 if (EVT(VT).isOverloaded()) {
455 OverloadedVTs.push_back(VT);
459 // Reject invalid types.
460 if (VT == MVT::isVoid && i != e-1 /*void at end means varargs*/)
461 throw "Intrinsic '" + DefName + " has void in result type list!";
463 IS.ParamVTs.push_back(VT);
464 IS.ParamTypeDefs.push_back(TyEl);
467 // Parse the intrinsic properties.
468 ListInit *PropList = R->getValueAsListInit("Properties");
469 for (unsigned i = 0, e = PropList->getSize(); i != e; ++i) {
470 Record *Property = PropList->getElementAsRecord(i);
471 assert(Property->isSubClassOf("IntrinsicProperty") &&
472 "Expected a property!");
474 if (Property->getName() == "IntrNoMem")
476 else if (Property->getName() == "IntrReadArgMem")
478 else if (Property->getName() == "IntrReadMem")
480 else if (Property->getName() == "IntrReadWriteArgMem")
481 ModRef = ReadWriteArgMem;
482 else if (Property->getName() == "Commutative")
483 isCommutative = true;
484 else if (Property->getName() == "Throws")
486 else if (Property->isSubClassOf("NoCapture")) {
487 unsigned ArgNo = Property->getValueAsInt("ArgNo");
488 ArgumentAttributes.push_back(std::make_pair(ArgNo, NoCapture));
490 assert(0 && "Unknown property!");
493 // Sort the argument attributes for later benefit.
494 std::sort(ArgumentAttributes.begin(), ArgumentAttributes.end());