1 //===- CodeGenTarget.cpp - CodeGen Target Class Wrapper ---------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This class wrap 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/Support/CommandLine.h"
26 static cl::opt<unsigned>
27 AsmWriterNum("asmwriternum", cl::init(0),
28 cl::desc("Make -gen-asm-writer emit assembly writer #N"));
30 /// getValueType - Return the MCV::ValueType that the specified TableGen record
32 MVT::ValueType llvm::getValueType(Record *Rec, const CodeGenTarget *CGT) {
33 MVT::ValueType VT = (MVT::ValueType)Rec->getValueAsInt("Value");
34 if (VT == MVT::iPTR) {
35 assert(CGT && "Use a pointer type in a place that isn't supported yet!");
36 VT = CGT->getPointerType();
41 std::string llvm::getName(MVT::ValueType T) {
43 case MVT::Other: return "UNKNOWN";
44 case MVT::i1: return "i1";
45 case MVT::i8: return "i8";
46 case MVT::i16: return "i16";
47 case MVT::i32: return "i32";
48 case MVT::i64: return "i64";
49 case MVT::i128: return "i128";
50 case MVT::f32: return "f32";
51 case MVT::f64: return "f64";
52 case MVT::f80: return "f80";
53 case MVT::f128: return "f128";
54 case MVT::Flag: return "Flag";
55 case MVT::isVoid:return "void";
56 case MVT::v8i8: return "v8i8";
57 case MVT::v4i16: return "v4i16";
58 case MVT::v2i32: return "v2i32";
59 case MVT::v16i8: return "v16i8";
60 case MVT::v8i16: return "v8i16";
61 case MVT::v4i32: return "v4i32";
62 case MVT::v2i64: return "v2i64";
63 case MVT::v2f32: return "v2f32";
64 case MVT::v4f32: return "v4f32";
65 case MVT::v2f64: return "v2f64";
66 default: assert(0 && "ILLEGAL VALUE TYPE!"); return "";
70 std::string llvm::getEnumName(MVT::ValueType T) {
72 case MVT::Other: return "Other";
73 case MVT::i1: return "i1";
74 case MVT::i8: return "i8";
75 case MVT::i16: return "i16";
76 case MVT::i32: return "i32";
77 case MVT::i64: return "i64";
78 case MVT::i128: return "i128";
79 case MVT::f32: return "f32";
80 case MVT::f64: return "f64";
81 case MVT::f80: return "f80";
82 case MVT::f128: return "f128";
83 case MVT::Flag: return "Flag";
84 case MVT::isVoid:return "isVoid";
85 case MVT::v8i8: return "v8i8";
86 case MVT::v4i16: return "v4i16";
87 case MVT::v2i32: return "v2i32";
88 case MVT::v16i8: return "v16i8";
89 case MVT::v8i16: return "v8i16";
90 case MVT::v4i32: return "v4i32";
91 case MVT::v2i64: return "v2i64";
92 case MVT::v2f32: return "v2f32";
93 case MVT::v4f32: return "v4f32";
94 case MVT::v2f64: return "v2f64";
95 default: assert(0 && "ILLEGAL VALUE TYPE!"); return "";
100 std::ostream &llvm::operator<<(std::ostream &OS, MVT::ValueType T) {
101 return OS << getName(T);
105 /// getTarget - Return the current instance of the Target class.
107 CodeGenTarget::CodeGenTarget() : PointerType(MVT::Other) {
108 std::vector<Record*> Targets = Records.getAllDerivedDefinitions("Target");
109 if (Targets.size() == 0)
110 throw std::string("ERROR: No 'Target' subclasses defined!");
111 if (Targets.size() != 1)
112 throw std::string("ERROR: Multiple subclasses of Target defined!");
113 TargetRec = Targets[0];
115 // Read in all of the CalleeSavedRegisters.
116 CalleeSavedRegisters =TargetRec->getValueAsListOfDefs("CalleeSavedRegisters");
117 PointerType = getValueType(TargetRec->getValueAsDef("PointerType"));
121 const std::string &CodeGenTarget::getName() const {
122 return TargetRec->getName();
125 Record *CodeGenTarget::getInstructionSet() const {
126 return TargetRec->getValueAsDef("InstructionSet");
129 /// getAsmWriter - Return the AssemblyWriter definition for this target.
131 Record *CodeGenTarget::getAsmWriter() const {
132 std::vector<Record*> LI = TargetRec->getValueAsListOfDefs("AssemblyWriters");
133 if (AsmWriterNum >= LI.size())
134 throw "Target does not have an AsmWriter #" + utostr(AsmWriterNum) + "!";
135 return LI[AsmWriterNum];
138 void CodeGenTarget::ReadRegisters() const {
139 std::vector<Record*> Regs = Records.getAllDerivedDefinitions("Register");
141 throw std::string("No 'Register' subclasses defined!");
143 Registers.reserve(Regs.size());
144 Registers.assign(Regs.begin(), Regs.end());
147 CodeGenRegister::CodeGenRegister(Record *R) : TheDef(R) {
148 DeclaredSpillSize = R->getValueAsInt("SpillSize");
149 DeclaredSpillAlignment = R->getValueAsInt("SpillAlignment");
152 const std::string &CodeGenRegister::getName() const {
153 return TheDef->getName();
156 void CodeGenTarget::ReadRegisterClasses() const {
157 std::vector<Record*> RegClasses =
158 Records.getAllDerivedDefinitions("RegisterClass");
159 if (RegClasses.empty())
160 throw std::string("No 'RegisterClass' subclasses defined!");
162 RegisterClasses.reserve(RegClasses.size());
163 RegisterClasses.assign(RegClasses.begin(), RegClasses.end());
166 std::vector<unsigned char> CodeGenTarget::getRegisterVTs(Record *R) const {
167 std::vector<unsigned char> Result;
168 const std::vector<CodeGenRegisterClass> &RCs = getRegisterClasses();
169 for (unsigned i = 0, e = RCs.size(); i != e; ++i) {
170 const CodeGenRegisterClass &RC = RegisterClasses[i];
171 for (unsigned ei = 0, ee = RC.Elements.size(); ei != ee; ++ei) {
172 if (R == RC.Elements[ei]) {
173 const std::vector<MVT::ValueType> &InVTs = RC.getValueTypes();
174 for (unsigned i = 0, e = InVTs.size(); i != e; ++i)
175 Result.push_back(InVTs[i]);
183 CodeGenRegisterClass::CodeGenRegisterClass(Record *R) : TheDef(R) {
184 // Rename anonymous register classes.
185 if (R->getName().size() > 9 && R->getName()[9] == '.') {
186 static unsigned AnonCounter = 0;
187 R->setName("AnonRegClass_"+utostr(AnonCounter++));
190 std::vector<Record*> TypeList = R->getValueAsListOfDefs("RegTypes");
191 for (unsigned i = 0, e = TypeList.size(); i != e; ++i) {
192 Record *Type = TypeList[i];
193 if (!Type->isSubClassOf("ValueType"))
194 throw "RegTypes list member '" + Type->getName() +
195 "' does not derive from the ValueType class!";
196 VTs.push_back(getValueType(Type));
198 assert(!VTs.empty() && "RegisterClass must contain at least one ValueType!");
200 std::vector<Record*> RegList = R->getValueAsListOfDefs("MemberList");
201 for (unsigned i = 0, e = RegList.size(); i != e; ++i) {
202 Record *Reg = RegList[i];
203 if (!Reg->isSubClassOf("Register"))
204 throw "Register Class member '" + Reg->getName() +
205 "' does not derive from the Register class!";
206 Elements.push_back(Reg);
209 // Allow targets to override the size in bits of the RegisterClass.
210 unsigned Size = R->getValueAsInt("Size");
212 Namespace = R->getValueAsString("Namespace");
213 SpillSize = Size ? Size : MVT::getSizeInBits(VTs[0]);
214 SpillAlignment = R->getValueAsInt("Alignment");
215 MethodBodies = R->getValueAsCode("MethodBodies");
216 MethodProtos = R->getValueAsCode("MethodProtos");
219 const std::string &CodeGenRegisterClass::getName() const {
220 return TheDef->getName();
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 std::string InstFormatName =
244 getAsmWriter()->getValueAsString("InstFormatName");
246 for (unsigned i = 0, e = Insts.size(); i != e; ++i) {
247 std::string AsmStr = Insts[i]->getValueAsString(InstFormatName);
248 Instructions.insert(std::make_pair(Insts[i]->getName(),
249 CodeGenInstruction(Insts[i], AsmStr)));
253 /// getInstructionsByEnumValue - Return all of the instructions defined by the
254 /// target, ordered by their enum value.
256 getInstructionsByEnumValue(std::vector<const CodeGenInstruction*>
257 &NumberedInstructions) {
258 std::map<std::string, CodeGenInstruction>::const_iterator I;
259 I = getInstructions().find("PHI");
260 if (I == Instructions.end()) throw "Could not find 'PHI' instruction!";
261 const CodeGenInstruction *PHI = &I->second;
263 I = getInstructions().find("INLINEASM");
264 if (I == Instructions.end()) throw "Could not find 'INLINEASM' instruction!";
265 const CodeGenInstruction *INLINEASM = &I->second;
267 // Print out the rest of the instructions now.
268 NumberedInstructions.push_back(PHI);
269 NumberedInstructions.push_back(INLINEASM);
270 for (inst_iterator II = inst_begin(), E = inst_end(); II != E; ++II)
271 if (&II->second != PHI &&&II->second != INLINEASM)
272 NumberedInstructions.push_back(&II->second);
276 /// isLittleEndianEncoding - Return whether this target encodes its instruction
277 /// in little-endian format, i.e. bits laid out in the order [0..n]
279 bool CodeGenTarget::isLittleEndianEncoding() const {
280 return getInstructionSet()->getValueAsBit("isLittleEndianEncoding");
283 CodeGenInstruction::CodeGenInstruction(Record *R, const std::string &AsmStr)
284 : TheDef(R), AsmString(AsmStr) {
285 Name = R->getValueAsString("Name");
286 Namespace = R->getValueAsString("Namespace");
288 isReturn = R->getValueAsBit("isReturn");
289 isBranch = R->getValueAsBit("isBranch");
290 isBarrier = R->getValueAsBit("isBarrier");
291 isCall = R->getValueAsBit("isCall");
292 isLoad = R->getValueAsBit("isLoad");
293 isStore = R->getValueAsBit("isStore");
294 isTwoAddress = R->getValueAsBit("isTwoAddress");
295 isConvertibleToThreeAddress = R->getValueAsBit("isConvertibleToThreeAddress");
296 isCommutable = R->getValueAsBit("isCommutable");
297 isTerminator = R->getValueAsBit("isTerminator");
298 hasDelaySlot = R->getValueAsBit("hasDelaySlot");
299 usesCustomDAGSchedInserter = R->getValueAsBit("usesCustomDAGSchedInserter");
300 hasCtrlDep = R->getValueAsBit("hasCtrlDep");
301 noResults = R->getValueAsBit("noResults");
302 hasVariableNumberOfOperands = false;
306 DI = R->getValueAsDag("OperandList");
308 // Error getting operand list, just ignore it (sparcv9).
314 unsigned MIOperandNo = 0;
315 std::set<std::string> OperandNames;
316 for (unsigned i = 0, e = DI->getNumArgs(); i != e; ++i) {
317 DefInit *Arg = dynamic_cast<DefInit*>(DI->getArg(i));
319 throw "Illegal operand for the '" + R->getName() + "' instruction!";
321 Record *Rec = Arg->getDef();
322 std::string PrintMethod = "printOperand";
324 DagInit *MIOpInfo = 0;
325 if (Rec->isSubClassOf("Operand")) {
326 PrintMethod = Rec->getValueAsString("PrintMethod");
327 NumOps = Rec->getValueAsInt("NumMIOperands");
328 MIOpInfo = Rec->getValueAsDag("MIOperandInfo");
329 } else if (Rec->getName() == "variable_ops") {
330 hasVariableNumberOfOperands = true;
332 } else if (!Rec->isSubClassOf("RegisterClass"))
333 throw "Unknown operand class '" + Rec->getName() +
334 "' in instruction '" + R->getName() + "' instruction!";
336 // Check that the operand has a name and that it's unique.
337 if (DI->getArgName(i).empty())
338 throw "In instruction '" + R->getName() + "', operand #" + utostr(i) +
340 if (!OperandNames.insert(DI->getArgName(i)).second)
341 throw "In instruction '" + R->getName() + "', operand #" + utostr(i) +
342 " has the same name as a previous operand!";
344 OperandList.push_back(OperandInfo(Rec, DI->getArgName(i), PrintMethod,
345 MIOperandNo, NumOps, MIOpInfo));
346 MIOperandNo += NumOps;
352 /// getOperandNamed - Return the index of the operand with the specified
353 /// non-empty name. If the instruction does not have an operand with the
354 /// specified name, throw an exception.
356 unsigned CodeGenInstruction::getOperandNamed(const std::string &Name) const {
357 assert(!Name.empty() && "Cannot search for operand with no name!");
358 for (unsigned i = 0, e = OperandList.size(); i != e; ++i)
359 if (OperandList[i].Name == Name) return i;
360 throw "Instruction '" + TheDef->getName() +
361 "' does not have an operand named '$" + Name + "'!";
364 //===----------------------------------------------------------------------===//
365 // ComplexPattern implementation
367 ComplexPattern::ComplexPattern(Record *R) {
368 Ty = ::getValueType(R->getValueAsDef("Ty"));
369 NumOperands = R->getValueAsInt("NumOperands");
370 SelectFunc = R->getValueAsString("SelectFunc");
371 RootNodes = R->getValueAsListOfDefs("RootNodes");
374 //===----------------------------------------------------------------------===//
375 // CodeGenIntrinsic Implementation
376 //===----------------------------------------------------------------------===//
378 std::vector<CodeGenIntrinsic> llvm::LoadIntrinsics(const RecordKeeper &RC) {
379 std::vector<Record*> I = RC.getAllDerivedDefinitions("Intrinsic");
381 std::vector<CodeGenIntrinsic> Result;
383 // If we are in the context of a target .td file, get the target info so that
384 // we can decode the current intptr_t.
385 CodeGenTarget *CGT = 0;
386 if (Records.getClass("Target") &&
387 Records.getAllDerivedDefinitions("Target").size() == 1)
388 CGT = new CodeGenTarget();
390 for (unsigned i = 0, e = I.size(); i != e; ++i)
391 Result.push_back(CodeGenIntrinsic(I[i], CGT));
396 CodeGenIntrinsic::CodeGenIntrinsic(Record *R, CodeGenTarget *CGT) {
398 std::string DefName = R->getName();
401 if (DefName.size() <= 4 ||
402 std::string(DefName.begin(), DefName.begin()+4) != "int_")
403 throw "Intrinsic '" + DefName + "' does not start with 'int_'!";
404 EnumName = std::string(DefName.begin()+4, DefName.end());
405 if (R->getValue("GCCBuiltinName")) // Ignore a missing GCCBuiltinName field.
406 GCCBuiltinName = R->getValueAsString("GCCBuiltinName");
407 TargetPrefix = R->getValueAsString("TargetPrefix");
408 Name = R->getValueAsString("LLVMName");
410 // If an explicit name isn't specified, derive one from the DefName.
412 for (unsigned i = 0, e = EnumName.size(); i != e; ++i)
413 if (EnumName[i] == '_')
418 // Verify it starts with "llvm.".
419 if (Name.size() <= 5 ||
420 std::string(Name.begin(), Name.begin()+5) != "llvm.")
421 throw "Intrinsic '" + DefName + "'s name does not start with 'llvm.'!";
424 // If TargetPrefix is specified, make sure that Name starts with
425 // "llvm.<targetprefix>.".
426 if (!TargetPrefix.empty()) {
427 if (Name.size() < 6+TargetPrefix.size() ||
428 std::string(Name.begin()+5, Name.begin()+6+TargetPrefix.size())
429 != (TargetPrefix+"."))
430 throw "Intrinsic '" + DefName + "' does not start with 'llvm." +
431 TargetPrefix + ".'!";
434 // Parse the list of argument types.
435 ListInit *TypeList = R->getValueAsListInit("Types");
436 for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
437 DefInit *DI = dynamic_cast<DefInit*>(TypeList->getElement(i));
438 assert(DI && "Invalid list type!");
439 Record *TyEl = DI->getDef();
440 assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
441 ArgTypes.push_back(TyEl->getValueAsString("TypeVal"));
444 ArgVTs.push_back(getValueType(TyEl->getValueAsDef("VT"), CGT));
445 ArgTypeDefs.push_back(TyEl);
447 if (ArgTypes.size() == 0)
448 throw "Intrinsic '"+DefName+"' needs at least a type for the ret value!";
450 // Parse the intrinsic properties.
451 ListInit *PropList = R->getValueAsListInit("Properties");
452 for (unsigned i = 0, e = PropList->getSize(); i != e; ++i) {
453 DefInit *DI = dynamic_cast<DefInit*>(PropList->getElement(i));
454 assert(DI && "Invalid list type!");
455 Record *Property = DI->getDef();
456 assert(Property->isSubClassOf("IntrinsicProperty") &&
457 "Expected a property!");
459 if (Property->getName() == "IntrNoMem")
461 else if (Property->getName() == "IntrReadArgMem")
463 else if (Property->getName() == "IntrReadMem")
465 else if (Property->getName() == "IntrWriteArgMem")
466 ModRef = WriteArgMem;
467 else if (Property->getName() == "IntrWriteMem")
470 assert(0 && "Unknown property!");