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"
19 #include "llvm/ADT/StringExtras.h"
20 #include "llvm/Support/CommandLine.h"
23 static cl::opt<unsigned>
24 AsmWriterNum("asmwriternum", cl::init(0),
25 cl::desc("Make -gen-asm-writer emit assembly writer #N"));
27 /// getValueType - Return the MCV::ValueType that the specified TableGen record
29 MVT::ValueType llvm::getValueType(Record *Rec) {
30 return (MVT::ValueType)Rec->getValueAsInt("Value");
33 std::string llvm::getName(MVT::ValueType T) {
35 case MVT::Other: return "UNKNOWN";
36 case MVT::i1: return "i1";
37 case MVT::i8: return "i8";
38 case MVT::i16: return "i16";
39 case MVT::i32: return "i32";
40 case MVT::i64: return "i64";
41 case MVT::i128: return "i128";
42 case MVT::f32: return "f32";
43 case MVT::f64: return "f64";
44 case MVT::f80: return "f80";
45 case MVT::f128: return "f128";
46 case MVT::isVoid:return "void";
47 default: assert(0 && "ILLEGAL VALUE TYPE!"); return "";
51 std::string llvm::getEnumName(MVT::ValueType T) {
53 case MVT::Other: return "Other";
54 case MVT::i1: return "i1";
55 case MVT::i8: return "i8";
56 case MVT::i16: return "i16";
57 case MVT::i32: return "i32";
58 case MVT::i64: return "i64";
59 case MVT::i128: return "i128";
60 case MVT::f32: return "f32";
61 case MVT::f64: return "f64";
62 case MVT::f80: return "f80";
63 case MVT::f128: return "f128";
64 case MVT::isVoid:return "isVoid";
65 default: assert(0 && "ILLEGAL VALUE TYPE!"); return "";
70 std::ostream &llvm::operator<<(std::ostream &OS, MVT::ValueType T) {
71 return OS << getName(T);
75 /// getTarget - Return the current instance of the Target class.
77 CodeGenTarget::CodeGenTarget() : PointerType(MVT::Other) {
78 std::vector<Record*> Targets = Records.getAllDerivedDefinitions("Target");
79 if (Targets.size() == 0)
80 throw std::string("ERROR: No 'Target' subclasses defined!");
81 if (Targets.size() != 1)
82 throw std::string("ERROR: Multiple subclasses of Target defined!");
83 TargetRec = Targets[0];
85 // Read in all of the CalleeSavedRegisters...
86 ListInit *LI = TargetRec->getValueAsListInit("CalleeSavedRegisters");
87 for (unsigned i = 0, e = LI->getSize(); i != e; ++i)
88 if (DefInit *DI = dynamic_cast<DefInit*>(LI->getElement(i)))
89 CalleeSavedRegisters.push_back(DI->getDef());
91 throw "Target: " + TargetRec->getName() +
92 " expected register definition in CalleeSavedRegisters list!";
94 PointerType = getValueType(TargetRec->getValueAsDef("PointerType"));
98 const std::string &CodeGenTarget::getName() const {
99 return TargetRec->getName();
102 Record *CodeGenTarget::getInstructionSet() const {
103 return TargetRec->getValueAsDef("InstructionSet");
106 /// getAsmWriter - Return the AssemblyWriter definition for this target.
108 Record *CodeGenTarget::getAsmWriter() const {
109 ListInit *LI = TargetRec->getValueAsListInit("AssemblyWriters");
110 if (AsmWriterNum >= LI->getSize())
111 throw "Target does not have an AsmWriter #" + utostr(AsmWriterNum) + "!";
112 DefInit *DI = dynamic_cast<DefInit*>(LI->getElement(AsmWriterNum));
113 if (!DI) throw std::string("AssemblyWriter list should be a list of defs!");
117 void CodeGenTarget::ReadRegisters() const {
118 std::vector<Record*> Regs = Records.getAllDerivedDefinitions("Register");
120 throw std::string("No 'Register' subclasses defined!");
122 Registers.reserve(Regs.size());
123 Registers.assign(Regs.begin(), Regs.end());
126 CodeGenRegister::CodeGenRegister(Record *R) : TheDef(R) {
127 DeclaredSpillSize = R->getValueAsInt("SpillSize");
128 DeclaredSpillAlignment = R->getValueAsInt("SpillAlignment");
131 const std::string &CodeGenRegister::getName() const {
132 return TheDef->getName();
135 void CodeGenTarget::ReadRegisterClasses() const {
136 std::vector<Record*> RegClasses =
137 Records.getAllDerivedDefinitions("RegisterClass");
138 if (RegClasses.empty())
139 throw std::string("No 'RegisterClass' subclasses defined!");
141 RegisterClasses.reserve(RegClasses.size());
142 RegisterClasses.assign(RegClasses.begin(), RegClasses.end());
145 CodeGenRegisterClass::CodeGenRegisterClass(Record *R) : TheDef(R) {
146 // Rename anonymous register classes.
147 if (R->getName().size() > 9 && R->getName()[9] == '.') {
148 static unsigned AnonCounter = 0;
149 R->setName("AnonRegClass_"+utostr(AnonCounter++));
152 Namespace = R->getValueAsString("Namespace");
153 SpillSize = R->getValueAsInt("Size");
154 SpillAlignment = R->getValueAsInt("Alignment");
155 VT = getValueType(R->getValueAsDef("RegType"));
157 if (CodeInit *CI = dynamic_cast<CodeInit*>(R->getValueInit("MethodBodies")))
158 MethodBodies = CI->getValue();
160 throw "Expected 'code' fragment for 'MethodBodies' value in register "
161 "class '" + getName() + "'!";
163 if (CodeInit *CI = dynamic_cast<CodeInit*>(R->getValueInit("MethodProtos")))
164 MethodProtos = CI->getValue();
166 throw "Expected 'code' fragment for 'MethodProtos' value in register "
167 "class '" + getName() + "'!";
169 ListInit *RegList = R->getValueAsListInit("MemberList");
170 for (unsigned i = 0, e = RegList->getSize(); i != e; ++i) {
171 DefInit *RegDef = dynamic_cast<DefInit*>(RegList->getElement(i));
172 if (!RegDef) throw "Register class member is not a record!";
173 Record *Reg = RegDef->getDef();
175 if (!Reg->isSubClassOf("Register"))
176 throw "Register Class member '" + Reg->getName() +
177 "' does not derive from the Register class!";
178 Elements.push_back(Reg);
182 const std::string &CodeGenRegisterClass::getName() const {
183 return TheDef->getName();
186 void CodeGenTarget::ReadLegalValueTypes() const {
187 const std::vector<CodeGenRegisterClass> &RCs = getRegisterClasses();
188 for (unsigned i = 0, e = RCs.size(); i != e; ++i)
189 LegalValueTypes.push_back(RCs[i].VT);
193 void CodeGenTarget::ReadInstructions() const {
194 std::vector<Record*> Insts = Records.getAllDerivedDefinitions("Instruction");
197 throw std::string("No 'Instruction' subclasses defined!");
199 std::string InstFormatName =
200 getAsmWriter()->getValueAsString("InstFormatName");
202 for (unsigned i = 0, e = Insts.size(); i != e; ++i) {
203 std::string AsmStr = Insts[i]->getValueAsString(InstFormatName);
204 Instructions.insert(std::make_pair(Insts[i]->getName(),
205 CodeGenInstruction(Insts[i], AsmStr)));
209 /// getPHIInstruction - Return the designated PHI instruction.
211 const CodeGenInstruction &CodeGenTarget::getPHIInstruction() const {
212 Record *PHI = getInstructionSet()->getValueAsDef("PHIInst");
213 std::map<std::string, CodeGenInstruction>::const_iterator I =
214 getInstructions().find(PHI->getName());
215 if (I == Instructions.end())
216 throw "Could not find PHI instruction named '" + PHI->getName() + "'!";
220 /// getInstructionsByEnumValue - Return all of the instructions defined by the
221 /// target, ordered by their enum value.
223 getInstructionsByEnumValue(std::vector<const CodeGenInstruction*>
224 &NumberedInstructions) {
226 // Print out the rest of the instructions now.
228 const CodeGenInstruction *PHI = &getPHIInstruction();
229 NumberedInstructions.push_back(PHI);
230 for (inst_iterator II = inst_begin(), E = inst_end(); II != E; ++II)
231 if (&II->second != PHI)
232 NumberedInstructions.push_back(&II->second);
236 /// isLittleEndianEncoding - Return whether this target encodes its instruction
237 /// in little-endian format, i.e. bits laid out in the order [0..n]
239 bool CodeGenTarget::isLittleEndianEncoding() const {
240 return getInstructionSet()->getValueAsBit("isLittleEndianEncoding");
243 CodeGenInstruction::CodeGenInstruction(Record *R, const std::string &AsmStr)
244 : TheDef(R), AsmString(AsmStr) {
245 Name = R->getValueAsString("Name");
246 Namespace = R->getValueAsString("Namespace");
248 isReturn = R->getValueAsBit("isReturn");
249 isBranch = R->getValueAsBit("isBranch");
250 isBarrier = R->getValueAsBit("isBarrier");
251 isCall = R->getValueAsBit("isCall");
252 isLoad = R->getValueAsBit("isLoad");
253 isStore = R->getValueAsBit("isStore");
254 isTwoAddress = R->getValueAsBit("isTwoAddress");
255 isConvertibleToThreeAddress = R->getValueAsBit("isConvertibleToThreeAddress");
256 isCommutable = R->getValueAsBit("isCommutable");
257 isTerminator = R->getValueAsBit("isTerminator");
258 hasDelaySlot = R->getValueAsBit("hasDelaySlot");
259 usesCustomDAGSchedInserter = R->getValueAsBit("usesCustomDAGSchedInserter");
260 hasVariableNumberOfOperands = false;
263 DagInit *DI = R->getValueAsDag("OperandList");
265 unsigned MIOperandNo = 0;
266 for (unsigned i = 0, e = DI->getNumArgs(); i != e; ++i)
267 if (DefInit *Arg = dynamic_cast<DefInit*>(DI->getArg(i))) {
268 Record *Rec = Arg->getDef();
270 std::string PrintMethod = "printOperand";
272 if (Rec->isSubClassOf("RegisterClass")) {
273 Ty = getValueType(Rec->getValueAsDef("RegType"));
274 } else if (Rec->isSubClassOf("Operand")) {
275 Ty = getValueType(Rec->getValueAsDef("Type"));
276 PrintMethod = Rec->getValueAsString("PrintMethod");
277 NumOps = Rec->getValueAsInt("NumMIOperands");
278 } else if (Rec->getName() == "variable_ops") {
279 hasVariableNumberOfOperands = true;
282 throw "Unknown operand class '" + Rec->getName() +
283 "' in instruction '" + R->getName() + "' instruction!";
285 OperandList.push_back(OperandInfo(Rec, Ty, DI->getArgName(i),
286 PrintMethod, MIOperandNo, NumOps));
287 MIOperandNo += NumOps;
289 throw "Illegal operand for the '" + R->getName() + "' instruction!";
292 // Error parsing operands list, just ignore it.
300 /// getOperandNamed - Return the index of the operand with the specified
301 /// non-empty name. If the instruction does not have an operand with the
302 /// specified name, throw an exception.
304 unsigned CodeGenInstruction::getOperandNamed(const std::string &Name) const {
305 assert(!Name.empty() && "Cannot search for operand with no name!");
306 for (unsigned i = 0, e = OperandList.size(); i != e; ++i)
307 if (OperandList[i].Name == Name) return i;
308 throw "Instruction '" + TheDef->getName() +
309 "' does not have an operand named '$" + Name + "'!";