1 //===-- FileParser.y - Parser for TableGen files ----------------*- C++ -*-===//
3 // This file implements the bison parser for Table Generator files...
5 //===------------------------------------------------------------------------=//
9 #include "Support/StringExtras.h"
12 #define YYERROR_VERBOSE 1
14 int yyerror(const char *ErrorMsg);
16 extern int Filelineno;
17 static Record *CurRec = 0;
19 typedef std::pair<Record*, std::vector<Init*>*> SubClassRefTy;
21 static std::vector<std::pair<std::pair<std::string, std::vector<unsigned>*>,
24 extern std::ostream &err();
26 static void addValue(const RecordVal &RV) {
27 if (CurRec->getValue(RV.getName())) {
28 err() << "Value '" << RV.getName() << "' multiply defined!\n";
35 static void addSuperClass(Record *SC) {
36 if (CurRec->isSubClassOf(SC)) {
37 err() << "Already subclass of '" << SC->getName() << "'!\n";
40 CurRec->addSuperClass(SC);
43 static void setValue(const std::string &ValName,
44 std::vector<unsigned> *BitList, Init *V) {
47 RecordVal *RV = CurRec->getValue(ValName);
49 err() << "Value '" << ValName << "' unknown!\n";
53 // If we are assigning to a subset of the bits in the value... then we must be
54 // assigning to a field of BitsRecTy, which must have a BitsInit
58 BitsInit *CurVal = dynamic_cast<BitsInit*>(RV->getValue());
60 err() << "Value '" << ValName << "' is not a bits type!\n";
64 // Convert the incoming value to a bits type of the appropriate size...
65 Init *BI = V->convertInitializerTo(new BitsRecTy(BitList->size()));
67 V->convertInitializerTo(new BitsRecTy(BitList->size()));
68 err() << "Initializer '" << *V << "' not compatible with bit range!\n";
72 // We should have a BitsInit type now...
73 assert(dynamic_cast<BitsInit*>(BI) != 0 || &(std::cerr << *BI) == 0);
74 BitsInit *BInit = (BitsInit*)BI;
76 BitsInit *NewVal = new BitsInit(CurVal->getNumBits());
78 // Loop over bits, assigning values as appropriate...
79 for (unsigned i = 0, e = BitList->size(); i != e; ++i) {
80 unsigned Bit = (*BitList)[i];
81 if (NewVal->getBit(Bit)) {
82 err() << "Cannot set bit #" << Bit << " of value '" << ValName
83 << "' more than once!\n";
86 NewVal->setBit(Bit, BInit->getBit(i));
89 for (unsigned i = 0, e = CurVal->getNumBits(); i != e; ++i)
90 if (NewVal->getBit(i) == 0)
91 NewVal->setBit(i, CurVal->getBit(i));
96 if (RV->setValue(V)) {
97 err() << "Value '" << ValName << "' of type '" << *RV->getType()
98 << "' is incompatible with initializer '" << *V << "'!\n";
103 static void addSubClass(Record *SC, const std::vector<Init*> &TemplateArgs) {
104 // Add all of the values in the subclass into the current class...
105 const std::vector<RecordVal> &Vals = SC->getValues();
106 for (unsigned i = 0, e = Vals.size(); i != e; ++i)
109 const std::vector<std::string> &TArgs = SC->getTemplateArgs();
111 // Ensure that an appropriate number of template arguments are specified...
112 if (TArgs.size() < TemplateArgs.size()) {
113 err() << "ERROR: More template args specified than expected!\n";
115 } else { // This class expects template arguments...
116 // Loop over all of the template arguments, setting them to the specified
117 // value or leaving them as the default as neccesary.
118 for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
119 if (i < TemplateArgs.size()) { // A value is specified for this temp-arg?
121 setValue(TArgs[i], 0, TemplateArgs[i]);
122 } else if (!CurRec->getValue(TArgs[i])->getValue()->isComplete()) {
123 err() << "ERROR: Value not specified for template argument #"
124 << i << " (" << TArgs[i] << ") of subclass '" << SC->getName()
132 // Since everything went well, we can now set the "superclass" list for the
134 const std::vector<Record*> &SCs = SC->getSuperClasses();
135 for (unsigned i = 0, e = SCs.size(); i != e; ++i)
136 addSuperClass(SCs[i]);
148 std::vector<Init*> *FieldList;
149 std::vector<Record*> *RecPtr;
150 std::vector<unsigned>*BitList;
152 SubClassRefTy *SubClassRef;
153 std::vector<SubClassRefTy> *SubClassList;
156 %token INT BIT STRING BITS LIST CODE CLASS DEF FIELD SET IN
157 %token <IntVal> INTVAL
158 %token <StrVal> ID STRVAL CODEFRAGMENT
161 %type <RecPtr> DefList DefListNE
162 %type <Rec> ClassInst DefInst Object ObjectBody ClassID DefID
164 %type <SubClassRef> SubClassRef
165 %type <SubClassList> ClassList ClassListNE
166 %type <IntVal> OptPrefix
167 %type <Initializer> Value OptValue
168 %type <FieldList> ValueList ValueListNE
169 %type <BitList> BitList OptBitList RBitList
170 %type <StrVal> Declaration OptID
176 $$ = Records.getClass(*$1);
178 err() << "Couldn't find class '" << *$1 << "'!\n";
185 $$ = Records.getDef(*$1);
187 err() << "Couldn't find def '" << *$1 << "'!\n";
195 Type : STRING { // string type
196 $$ = new StringRecTy();
197 } | BIT { // bit type
199 } | BITS '<' INTVAL '>' { // bits<x> type
200 $$ = new BitsRecTy($3);
201 } | INT { // int type
203 } | LIST '<' ClassID '>' { // list<x> type
204 $$ = new ListRecTy($3);
205 } | CODE { // code type
206 $$ = new CodeRecTy();
207 } | ClassID { // Record Type
208 $$ = new RecordRecTy($1);
211 OptPrefix : /*empty*/ { $$ = 0; } | FIELD { $$ = 1; };
213 OptValue : /*empty*/ { $$ = 0; } | '=' Value { $$ = $2; };
216 $$ = new IntInit($1);
218 $$ = new StringInit(*$1);
221 $$ = new CodeInit(*$1);
224 $$ = new UnsetInit();
225 } | '{' ValueList '}' {
226 BitsInit *Init = new BitsInit($2->size());
227 for (unsigned i = 0, e = $2->size(); i != e; ++i) {
228 struct Init *Bit = (*$2)[i]->convertInitializerTo(new BitRecTy());
230 err() << "Element #" << i << " (" << *(*$2)[i]
231 << ") is not convertable to a bit!\n";
234 Init->setBit($2->size()-i-1, Bit);
240 err() << "Def/Class name '" << *$1 << "' not allowed here!\n";
243 if (const RecordVal *RV = CurRec->getValue(*$1)) {
244 $$ = new VarInit(*$1, RV->getType());
245 } else if (Record *D = Records.getDef(*$1)) {
248 err() << "Variable not defined: '" << *$1 << "'!\n";
253 } | Value '{' BitList '}' {
254 $$ = $1->convertInitializerBitRange(*$3);
256 err() << "Invalid bit range for value '" << *$1 << "'!\n";
260 } | '[' DefList ']' {
261 $$ = new ListInit(*$2);
264 if (!$1->getFieldType(*$3)) {
265 err() << "Cannot access field '" << *$3 << "' of value '" << *$1 << "!\n";
268 $$ = new FieldInit($1, *$3);
272 DefList : /*empty */ {
273 $$ = new std::vector<Record*>();
278 $$ = new std::vector<Record*>();
280 } | DefListNE ',' DefID {
281 ($$=$1)->push_back($3);
286 $$ = new std::vector<unsigned>();
288 } | INTVAL '-' INTVAL {
289 if ($1 < $3 || $1 < 0 || $3 < 0) {
290 err() << "Invalid bit range: " << $1 << "-" << $3 << "!\n";
293 $$ = new std::vector<unsigned>();
294 for (int i = $1; i >= $3; --i)
298 if ($1 < $2 || $1 < 0 || $2 < 0) {
299 err() << "Invalid bit range: " << $1 << "-" << $2 << "!\n";
302 $$ = new std::vector<unsigned>();
303 for (int i = $1; i >= $2; --i)
305 } | RBitList ',' INTVAL {
306 ($$=$1)->push_back($3);
307 } | RBitList ',' INTVAL '-' INTVAL {
308 if ($3 < $5 || $3 < 0 || $5 < 0) {
309 err() << "Invalid bit range: " << $3 << "-" << $5 << "!\n";
313 for (int i = $3; i >= $5; --i)
315 } | RBitList ',' INTVAL INTVAL {
317 if ($3 < $4 || $3 < 0 || $4 < 0) {
318 err() << "Invalid bit range: " << $3 << "-" << $4 << "!\n";
322 for (int i = $3; i >= $4; --i)
326 BitList : RBitList { $$ = $1; std::reverse($1->begin(), $1->end()); };
328 OptBitList : /*empty*/ { $$ = 0; } | '{' BitList '}' { $$ = $2; };
332 ValueList : /*empty*/ {
333 $$ = new std::vector<Init*>();
338 ValueListNE : Value {
339 $$ = new std::vector<Init*>();
341 } | ValueListNE ',' Value {
342 ($$ = $1)->push_back($3);
345 Declaration : OptPrefix Type ID OptValue {
346 addValue(RecordVal(*$3, $2, $1));
347 setValue(*$3, 0, $4);
351 BodyItem : Declaration ';' {
353 } | SET ID OptBitList '=' Value ';' {
354 setValue(*$2, $3, $5);
359 BodyList : /*empty*/ | BodyList BodyItem;
360 Body : ';' | '{' BodyList '}';
362 SubClassRef : ClassID {
363 $$ = new SubClassRefTy($1, new std::vector<Init*>());
364 } | ClassID '<' ValueListNE '>' {
365 $$ = new SubClassRefTy($1, $3);
368 ClassListNE : SubClassRef {
369 $$ = new std::vector<SubClassRefTy>();
373 | ClassListNE ',' SubClassRef {
374 ($$=$1)->push_back(*$3);
378 ClassList : /*empty */ {
379 $$ = new std::vector<SubClassRefTy>();
385 DeclListNE : Declaration {
386 CurRec->addTemplateArg(*$1);
388 } | DeclListNE ',' Declaration {
389 CurRec->addTemplateArg(*$3);
393 TemplateArgList : '<' DeclListNE '>' {};
394 OptTemplateArgList : /*empty*/ | TemplateArgList;
396 OptID : ID { $$ = $1; } | /*empty*/ { $$ = new std::string(); };
399 static unsigned AnonCounter = 0;
401 *$1 = "anonymous."+utostr(AnonCounter++);
402 CurRec = new Record(*$1);
404 } OptTemplateArgList ClassList {
405 for (unsigned i = 0, e = $4->size(); i != e; ++i) {
406 addSubClass((*$4)[i].first, *(*$4)[i].second);
407 // Delete the template arg values for the class
408 delete (*$4)[i].second;
411 // Process any variables on the set stack...
412 for (unsigned i = 0, e = SetStack.size(); i != e; ++i)
413 setValue(SetStack[i].first.first, SetStack[i].first.second,
416 CurRec->resolveReferences();
418 // Now that all of the references have been resolved, we can delete template
419 // arguments for superclasses, so they don't pollute our record, and so that
420 // their names won't conflict with later uses of the name...
421 for (unsigned i = 0, e = $4->size(); i != e; ++i) {
422 Record *SuperClass = (*$4)[i].first;
423 for (unsigned i = 0, e = SuperClass->getTemplateArgs().size(); i != e; ++i)
424 CurRec->removeValue(SuperClass->getTemplateArgs()[i]);
426 delete $4; // Delete the class list...
432 ClassInst : CLASS ObjectBody {
433 if (Records.getClass($2->getName())) {
434 err() << "Class '" << $2->getName() << "' already defined!\n";
437 Records.addClass($$ = $2);
440 DefInst : DEF ObjectBody {
441 if (!$2->getTemplateArgs().empty()) {
442 err() << "Def '" << $2->getName()
443 << "' is not permitted to have template arguments!\n";
446 // If ObjectBody has template arguments, it's an error.
447 if (Records.getDef($2->getName())) {
448 err() << "Def '" << $2->getName() << "' already defined!\n";
451 Records.addDef($$ = $2);
455 Object : ClassInst | DefInst;
457 // SETCommand - A 'SET' statement start...
458 SETCommand : SET ID OptBitList '=' Value IN {
459 SetStack.push_back(std::make_pair(std::make_pair(*$2, $3), $5));
463 // Support Set commands wrapping objects... both with and without braces.
464 Object : SETCommand '{' ObjectList '}' {
465 delete SetStack.back().first.second; // Delete OptBitList
468 | SETCommand Object {
469 delete SetStack.back().first.second; // Delete OptBitList
473 ObjectList : Object {} | ObjectList Object {};
475 File : ObjectList {};
479 int yyerror(const char *ErrorMsg) {
480 err() << "Error parsing: " << ErrorMsg << "\n";