//===-- FileParser.y - Parser for TableGen files ----------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
//
// This file implements the bison parser for Table Generator files...
//
-//===------------------------------------------------------------------------=//
+//===----------------------------------------------------------------------===//
%{
#include "Record.h"
-#include <iostream>
+#include "llvm/ADT/StringExtras.h"
#include <algorithm>
-#include <string>
-#include <stdio.h>
+#include <cstdio>
#define YYERROR_VERBOSE 1
int yyerror(const char *ErrorMsg);
int yylex();
-extern FILE *Filein;
+
+namespace llvm {
+
extern int Filelineno;
-int Fileparse();
static Record *CurRec = 0;
+static bool ParsingTemplateArgs = false;
typedef std::pair<Record*, std::vector<Init*>*> SubClassRefTy;
-static std::vector<std::pair<std::pair<std::string, std::vector<unsigned>*>,
- Init*> > SetStack;
+struct LetRecord {
+ std::string Name;
+ std::vector<unsigned> Bits;
+ Init *Value;
+ bool HasBits;
+ LetRecord(const std::string &N, std::vector<unsigned> *B, Init *V)
+ : Name(N), Value(V), HasBits(B != 0) {
+ if (HasBits) Bits = *B;
+ }
+};
-void ParseFile() {
- FILE *F = stdin;
+static std::vector<std::vector<LetRecord> > LetStack;
- Filein = F;
- Filelineno = 1;
- Fileparse();
- Filein = stdin;
-}
-static std::ostream &err() {
- return std::cerr << "Parsing Line #" << Filelineno << ": ";
-}
+extern std::ostream &err();
static void addValue(const RecordVal &RV) {
- if (CurRec->getValue(RV.getName())) {
- err() << "Value '" << RV.getName() << "' multiply defined!\n";
- abort();
+ if (RecordVal *ERV = CurRec->getValue(RV.getName())) {
+ // The value already exists in the class, treat this as a set...
+ if (ERV->setValue(RV.getValue())) {
+ err() << "New definition of '" << RV.getName() << "' of type '"
+ << *RV.getType() << "' is incompatible with previous "
+ << "definition of type '" << *ERV->getType() << "'!\n";
+ exit(1);
+ }
+ } else {
+ CurRec->addValue(RV);
}
-
- CurRec->addValue(RV);
}
static void addSuperClass(Record *SC) {
if (CurRec->isSubClassOf(SC)) {
err() << "Already subclass of '" << SC->getName() << "'!\n";
- abort();
+ exit(1);
}
CurRec->addSuperClass(SC);
}
static void setValue(const std::string &ValName,
std::vector<unsigned> *BitList, Init *V) {
- if (!V) return ;
+ if (!V) return;
RecordVal *RV = CurRec->getValue(ValName);
if (RV == 0) {
err() << "Value '" << ValName << "' unknown!\n";
- abort();
+ exit(1);
}
+
+ // Do not allow assignments like 'X = X'. This will just cause infinite loops
+ // in the resolution machinery.
+ if (!BitList)
+ if (VarInit *VI = dynamic_cast<VarInit*>(V))
+ if (VI->getName() == ValName)
+ return;
// If we are assigning to a subset of the bits in the value... then we must be
// assigning to a field of BitsRecTy, which must have a BitsInit
BitsInit *CurVal = dynamic_cast<BitsInit*>(RV->getValue());
if (CurVal == 0) {
err() << "Value '" << ValName << "' is not a bits type!\n";
- abort();
+ exit(1);
}
// Convert the incoming value to a bits type of the appropriate size...
if (BI == 0) {
V->convertInitializerTo(new BitsRecTy(BitList->size()));
err() << "Initializer '" << *V << "' not compatible with bit range!\n";
- abort();
+ exit(1);
}
// We should have a BitsInit type now...
// Loop over bits, assigning values as appropriate...
for (unsigned i = 0, e = BitList->size(); i != e; ++i) {
unsigned Bit = (*BitList)[i];
- if (NewVal->getBit(i)) {
- err() << "Cannot set bit #" << i << " of value '" << ValName
+ if (NewVal->getBit(Bit)) {
+ err() << "Cannot set bit #" << Bit << " of value '" << ValName
<< "' more than once!\n";
- abort();
+ exit(1);
}
NewVal->setBit(Bit, BInit->getBit(i));
}
if (RV->setValue(V)) {
err() << "Value '" << ValName << "' of type '" << *RV->getType()
<< "' is incompatible with initializer '" << *V << "'!\n";
- abort();
+ exit(1);
}
}
+// addSubClass - Add SC as a subclass to CurRec, resolving TemplateArgs as SC's
+// template arguments.
static void addSubClass(Record *SC, const std::vector<Init*> &TemplateArgs) {
// Add all of the values in the subclass into the current class...
const std::vector<RecordVal> &Vals = SC->getValues();
// Ensure that an appropriate number of template arguments are specified...
if (TArgs.size() < TemplateArgs.size()) {
- err() << "ERROR: More template args specified thang expected!\n";
- abort();
+ err() << "ERROR: More template args specified than expected!\n";
+ exit(1);
} else { // This class expects template arguments...
// Loop over all of the template arguments, setting them to the specified
- // value or leaving them as the default as neccesary.
+ // value or leaving them as the default if necessary.
for (unsigned i = 0, e = TArgs.size(); i != e; ++i) {
if (i < TemplateArgs.size()) { // A value is specified for this temp-arg?
- // Set it now.
- setValue(TArgs[i], 0, TemplateArgs[i]);
+ // Set it now.
+ setValue(TArgs[i], 0, TemplateArgs[i]);
+
+ // Resolve it next.
+ CurRec->resolveReferencesTo(CurRec->getValue(TArgs[i]));
+
+
+ // Now remove it.
+ CurRec->removeValue(TArgs[i]);
+
} else if (!CurRec->getValue(TArgs[i])->getValue()->isComplete()) {
- err() << "ERROR: Value not specified for template argument #"
- << i << " (" << TArgs[i] << ") of subclass '" << SC->getName()
- << "'!\n";
- abort();
+ err() << "ERROR: Value not specified for template argument #"
+ << i << " (" << TArgs[i] << ") of subclass '" << SC->getName()
+ << "'!\n";
+ exit(1);
}
}
}
-
// Since everything went well, we can now set the "superclass" list for the
// current record.
- const std::vector<Record*> &SCs = SC->getSuperClasses();
+ const std::vector<Record*> &SCs = SC->getSuperClasses();
for (unsigned i = 0, e = SCs.size(); i != e; ++i)
addSuperClass(SCs[i]);
addSuperClass(SC);
}
+} // End llvm namespace
+
+using namespace llvm;
%}
%union {
- std::string *StrVal;
- int IntVal;
- RecTy *Ty;
- Init *Initializer;
- std::vector<Init*> *FieldList;
- std::vector<Record*> *RecPtr;
- std::vector<unsigned>*BitList;
- Record *Rec;
- SubClassRefTy *SubClassRef;
- std::vector<SubClassRefTy> *SubClassList;
+ std::string* StrVal;
+ int IntVal;
+ llvm::RecTy* Ty;
+ llvm::Init* Initializer;
+ std::vector<llvm::Init*>* FieldList;
+ std::vector<unsigned>* BitList;
+ llvm::Record* Rec;
+ SubClassRefTy* SubClassRef;
+ std::vector<SubClassRefTy>* SubClassList;
+ std::vector<std::pair<llvm::Init*, std::string> >* DagValueList;
};
-%token INT BIT STRING BITS LIST CLASS DEF FIELD SET IN
+%token INT BIT STRING BITS LIST CODE DAG CLASS DEF FIELD LET IN
+%token SHLTOK SRATOK SRLTOK
%token <IntVal> INTVAL
-%token <StrVal> ID STRVAL
+%token <StrVal> ID VARNAME STRVAL CODEFRAGMENT
%type <Ty> Type
-%type <RecPtr> DefList DefListNE
-%type <Rec> ClassInst DefInst Object ObjectBody ClassID DefID
+%type <Rec> ClassInst DefInst Object ObjectBody ClassID
%type <SubClassRef> SubClassRef
%type <SubClassList> ClassList ClassListNE
%type <IntVal> OptPrefix
%type <Initializer> Value OptValue
+%type <DagValueList> DagArgList DagArgListNE
%type <FieldList> ValueList ValueListNE
%type <BitList> BitList OptBitList RBitList
-%type <StrVal> Declaration
+%type <StrVal> Declaration OptID OptVarName ObjectName
%start File
+
%%
ClassID : ID {
$$ = Records.getClass(*$1);
if ($$ == 0) {
err() << "Couldn't find class '" << *$1 << "'!\n";
- abort();
- }
- delete $1;
- };
-
-DefID : ID {
- $$ = Records.getDef(*$1);
- if ($$ == 0) {
- err() << "Couldn't find def '" << *$1 << "'!\n";
- abort();
+ exit(1);
}
delete $1;
};
$$ = new BitsRecTy($3);
} | INT { // int type
$$ = new IntRecTy();
- } | LIST '<' ClassID '>' { // list<x> type
+ } | LIST '<' Type '>' { // list<x> type
$$ = new ListRecTy($3);
+ } | CODE { // code type
+ $$ = new CodeRecTy();
+ } | DAG { // dag type
+ $$ = new DagRecTy();
} | ClassID { // Record Type
$$ = new RecordRecTy($1);
};
} | STRVAL {
$$ = new StringInit(*$1);
delete $1;
+ } | CODEFRAGMENT {
+ $$ = new CodeInit(*$1);
+ delete $1;
} | '?' {
$$ = new UnsetInit();
} | '{' ValueList '}' {
for (unsigned i = 0, e = $2->size(); i != e; ++i) {
struct Init *Bit = (*$2)[i]->convertInitializerTo(new BitRecTy());
if (Bit == 0) {
- err() << "Element #" << i << " (" << *(*$2)[i]
- << ") is not convertable to a bit!\n";
- abort();
+ err() << "Element #" << i << " (" << *(*$2)[i]
+ << ") is not convertable to a bit!\n";
+ exit(1);
}
Init->setBit($2->size()-i-1, Bit);
}
$$ = Init;
delete $2;
+ } | ID '<' ValueListNE '>' {
+ // This is a CLASS<initvalslist> expression. This is supposed to synthesize
+ // a new anonymous definition, deriving from CLASS<initvalslist> with no
+ // body.
+ Record *Class = Records.getClass(*$1);
+ if (!Class) {
+ err() << "Expected a class, got '" << *$1 << "'!\n";
+ exit(1);
+ }
+ delete $1;
+
+ static unsigned AnonCounter = 0;
+ Record *OldRec = CurRec; // Save CurRec.
+
+ // Create the new record, set it as CurRec temporarily.
+ CurRec = new Record("anonymous.val."+utostr(AnonCounter++));
+ addSubClass(Class, *$3); // Add info about the subclass to CurRec.
+ delete $3; // Free up the template args.
+
+ CurRec->resolveReferences();
+
+ Records.addDef(CurRec);
+
+ // The result of the expression is a reference to the new record.
+ $$ = new DefInit(CurRec);
+
+ // Restore the old CurRec
+ CurRec = OldRec;
} | ID {
- if (const RecordVal *RV = CurRec->getValue(*$1)) {
+ if (const RecordVal *RV = (CurRec ? CurRec->getValue(*$1) : 0)) {
$$ = new VarInit(*$1, RV->getType());
+ } else if (CurRec && CurRec->isTemplateArg(CurRec->getName()+":"+*$1)) {
+ const RecordVal *RV = CurRec->getValue(CurRec->getName()+":"+*$1);
+ assert(RV && "Template arg doesn't exist??");
+ $$ = new VarInit(CurRec->getName()+":"+*$1, RV->getType());
} else if (Record *D = Records.getDef(*$1)) {
$$ = new DefInit(D);
} else {
err() << "Variable not defined: '" << *$1 << "'!\n";
- abort();
+ exit(1);
}
delete $1;
$$ = $1->convertInitializerBitRange(*$3);
if ($$ == 0) {
err() << "Invalid bit range for value '" << *$1 << "'!\n";
- abort();
+ exit(1);
}
delete $3;
- } | '[' DefList ']' {
+ } | '[' ValueList ']' {
$$ = new ListInit(*$2);
delete $2;
} | Value '.' ID {
if (!$1->getFieldType(*$3)) {
err() << "Cannot access field '" << *$3 << "' of value '" << *$1 << "!\n";
- abort();
+ exit(1);
}
$$ = new FieldInit($1, *$3);
delete $3;
+ } | '(' ID DagArgList ')' {
+ Record *D = Records.getDef(*$2);
+ if (D == 0) {
+ err() << "Invalid def '" << *$2 << "'!\n";
+ exit(1);
+ }
+ $$ = new DagInit(D, *$3);
+ delete $2; delete $3;
+ } | Value '[' BitList ']' {
+ std::reverse($3->begin(), $3->end());
+ $$ = $1->convertInitListSlice(*$3);
+ if ($$ == 0) {
+ err() << "Invalid list slice for value '" << *$1 << "'!\n";
+ exit(1);
+ }
+ delete $3;
+ } | SHLTOK '(' Value ',' Value ')' {
+ $$ = $3->getBinaryOp(Init::SHL, $5);
+ if ($$ == 0) {
+ err() << "Cannot shift values '" << *$3 << "' and '" << *$5 << "'!\n";
+ exit(1);
+ }
+ } | SRATOK '(' Value ',' Value ')' {
+ $$ = $3->getBinaryOp(Init::SRA, $5);
+ if ($$ == 0) {
+ err() << "Cannot shift values '" << *$3 << "' and '" << *$5 << "'!\n";
+ exit(1);
+ }
+ } | SRLTOK '(' Value ',' Value ')' {
+ $$ = $3->getBinaryOp(Init::SRL, $5);
+ if ($$ == 0) {
+ err() << "Cannot shift values '" << *$3 << "' and '" << *$5 << "'!\n";
+ exit(1);
+ }
};
-DefList : /*empty */ {
- $$ = new std::vector<Record*>();
- } | DefListNE {
- $$ = $1;
+OptVarName : /* empty */ {
+ $$ = new std::string();
+ }
+ | ':' VARNAME {
+ $$ = $2;
};
-DefListNE : DefID {
- $$ = new std::vector<Record*>();
- $$->push_back($1);
- } | DefListNE ',' DefID {
- ($$=$1)->push_back($3);
+
+DagArgListNE : Value OptVarName {
+ $$ = new std::vector<std::pair<Init*, std::string> >();
+ $$->push_back(std::make_pair($1, *$2));
+ delete $2;
+ }
+ | DagArgListNE ',' Value OptVarName {
+ $1->push_back(std::make_pair($3, *$4));
+ delete $4;
+ $$ = $1;
};
+DagArgList : /*empty*/ {
+ $$ = new std::vector<std::pair<Init*, std::string> >();
+ }
+ | DagArgListNE { $$ = $1; };
+
RBitList : INTVAL {
$$ = new std::vector<unsigned>();
$$->push_back($1);
} | INTVAL '-' INTVAL {
- if ($1 < $3 || $1 < 0 || $3 < 0) {
- err() << "Invalid bit range: " << $1 << "-" << $3 << "!\n";
- abort();
+ if ($1 < 0 || $3 < 0) {
+ err() << "Invalid range: " << $1 << "-" << $3 << "!\n";
+ exit(1);
}
$$ = new std::vector<unsigned>();
- for (int i = $1; i >= $3; --i)
- $$->push_back(i);
+ if ($1 < $3) {
+ for (int i = $1; i <= $3; ++i)
+ $$->push_back(i);
+ } else {
+ for (int i = $1; i >= $3; --i)
+ $$->push_back(i);
+ }
} | INTVAL INTVAL {
$2 = -$2;
- if ($1 < $2 || $1 < 0 || $2 < 0) {
- err() << "Invalid bit range: " << $1 << "-" << $2 << "!\n";
- abort();
+ if ($1 < 0 || $2 < 0) {
+ err() << "Invalid range: " << $1 << "-" << $2 << "!\n";
+ exit(1);
}
$$ = new std::vector<unsigned>();
- for (int i = $1; i >= $2; --i)
- $$->push_back(i);
+ if ($1 < $2) {
+ for (int i = $1; i <= $2; ++i)
+ $$->push_back(i);
+ } else {
+ for (int i = $1; i >= $2; --i)
+ $$->push_back(i);
+ }
} | RBitList ',' INTVAL {
($$=$1)->push_back($3);
} | RBitList ',' INTVAL '-' INTVAL {
- if ($3 < $5 || $3 < 0 || $5 < 0) {
- err() << "Invalid bit range: " << $3 << "-" << $5 << "!\n";
- abort();
+ if ($3 < 0 || $5 < 0) {
+ err() << "Invalid range: " << $3 << "-" << $5 << "!\n";
+ exit(1);
}
$$ = $1;
- for (int i = $3; i >= $5; --i)
- $$->push_back(i);
+ if ($3 < $5) {
+ for (int i = $3; i <= $5; ++i)
+ $$->push_back(i);
+ } else {
+ for (int i = $3; i >= $5; --i)
+ $$->push_back(i);
+ }
} | RBitList ',' INTVAL INTVAL {
$4 = -$4;
- if ($3 < $4 || $3 < 0 || $4 < 0) {
- err() << "Invalid bit range: " << $3 << "-" << $4 << "!\n";
- abort();
+ if ($3 < 0 || $4 < 0) {
+ err() << "Invalid range: " << $3 << "-" << $4 << "!\n";
+ exit(1);
}
$$ = $1;
- for (int i = $3; i >= $4; --i)
- $$->push_back(i);
+ if ($3 < $4) {
+ for (int i = $3; i <= $4; ++i)
+ $$->push_back(i);
+ } else {
+ for (int i = $3; i >= $4; --i)
+ $$->push_back(i);
+ }
};
BitList : RBitList { $$ = $1; std::reverse($1->begin(), $1->end()); };
};
Declaration : OptPrefix Type ID OptValue {
- addValue(RecordVal(*$3, $2, $1));
- setValue(*$3, 0, $4);
- $$ = $3;
+ std::string DecName = *$3;
+ if (ParsingTemplateArgs)
+ DecName = CurRec->getName() + ":" + DecName;
+
+ addValue(RecordVal(DecName, $2, $1));
+ setValue(DecName, 0, $4);
+ $$ = new std::string(DecName);
};
BodyItem : Declaration ';' {
delete $1;
-} | SET ID OptBitList '=' Value ';' {
+} | LET ID OptBitList '=' Value ';' {
setValue(*$2, $3, $5);
delete $2;
delete $3;
TemplateArgList : '<' DeclListNE '>' {};
OptTemplateArgList : /*empty*/ | TemplateArgList;
-ObjectBody : ID {
- CurRec = new Record(*$1);
- delete $1;
- } OptTemplateArgList ClassList {
- for (unsigned i = 0, e = $4->size(); i != e; ++i) {
- addSubClass((*$4)[i].first, *(*$4)[i].second);
- delete (*$4)[i].second; // Delete the template list
- }
- delete $4;
-
- // Process any variables on the set stack...
- for (unsigned i = 0, e = SetStack.size(); i != e; ++i)
- setValue(SetStack[i].first.first, SetStack[i].first.second,
- SetStack[i].second);
- } Body {
- CurRec->resolveReferences();
- $$ = CurRec;
- CurRec = 0;
+OptID : ID { $$ = $1; } | /*empty*/ { $$ = new std::string(); };
+
+ObjectName : OptID {
+ static unsigned AnonCounter = 0;
+ if ($1->empty())
+ *$1 = "anonymous."+utostr(AnonCounter++);
+ $$ = $1;
};
-ClassInst : CLASS ObjectBody {
- if (Records.getClass($2->getName())) {
- err() << "Class '" << $2->getName() << "' already defined!\n";
- abort();
+ClassName : ObjectName {
+ // If a class of this name already exists, it must be a forward ref.
+ if ((CurRec = Records.getClass(*$1))) {
+ // If the body was previously defined, this is an error.
+ if (!CurRec->getValues().empty() ||
+ !CurRec->getSuperClasses().empty() ||
+ !CurRec->getTemplateArgs().empty()) {
+ err() << "Class '" << CurRec->getName() << "' already defined!\n";
+ exit(1);
+ }
+ } else {
+ // If this is the first reference to this class, create and add it.
+ CurRec = new Record(*$1);
+ Records.addClass(CurRec);
}
- Records.addClass($$ = $2);
+ delete $1;
};
-DefInst : DEF ObjectBody {
- // TODO: If ObjectBody has template arguments, it's an error.
- if (Records.getDef($2->getName())) {
- err() << "Def '" << $2->getName() << "' already defined!\n";
- abort();
+DefName : ObjectName {
+ CurRec = new Record(*$1);
+ delete $1;
+
+ // Ensure redefinition doesn't happen.
+ if (Records.getDef(CurRec->getName())) {
+ err() << "Def '" << CurRec->getName() << "' already defined!\n";
+ exit(1);
}
- Records.addDef($$ = $2);
+ Records.addDef(CurRec);
+};
+
+ObjectBody : ClassList {
+ for (unsigned i = 0, e = $1->size(); i != e; ++i) {
+ addSubClass((*$1)[i].first, *(*$1)[i].second);
+ // Delete the template arg values for the class
+ delete (*$1)[i].second;
+ }
+ delete $1; // Delete the class list...
+
+ // Process any variables on the set stack...
+ for (unsigned i = 0, e = LetStack.size(); i != e; ++i)
+ for (unsigned j = 0, e = LetStack[i].size(); j != e; ++j)
+ setValue(LetStack[i][j].Name,
+ LetStack[i][j].HasBits ? &LetStack[i][j].Bits : 0,
+ LetStack[i][j].Value);
+ } Body {
+ $$ = CurRec;
+ CurRec = 0;
+ };
+
+ClassInst : CLASS ClassName {
+ ParsingTemplateArgs = true;
+ } OptTemplateArgList {
+ ParsingTemplateArgs = false;
+ } ObjectBody {
+ $$ = $6;
+ };
+
+DefInst : DEF DefName ObjectBody {
+ $3->resolveReferences();
+
+ // If ObjectBody has template arguments, it's an error.
+ assert($3->getTemplateArgs().empty() && "How'd this get template args?");
+ $$ = $3;
};
Object : ClassInst | DefInst;
-// Support Set commands wrapping objects...
-Object : SET ID OptBitList '=' Value IN {
- SetStack.push_back(std::make_pair(std::make_pair(*$2, $3), $5));
- delete $2;
- } '{' ObjectList '}' {
- delete SetStack.back().first.second; // Delete OptBitList
- SetStack.pop_back();
+LETItem : ID OptBitList '=' Value {
+ LetStack.back().push_back(LetRecord(*$1, $2, $4));
+ delete $1; delete $2;
+};
+
+LETList : LETItem | LETList ',' LETItem;
+
+// LETCommand - A 'LET' statement start...
+LETCommand : LET { LetStack.push_back(std::vector<LetRecord>()); } LETList IN;
+
+// Support Set commands wrapping objects... both with and without braces.
+Object : LETCommand '{' ObjectList '}' {
+ LetStack.pop_back();
+ }
+ | LETCommand Object {
+ LetStack.pop_back();
};
ObjectList : Object {} | ObjectList Object {};
int yyerror(const char *ErrorMsg) {
err() << "Error parsing: " << ErrorMsg << "\n";
- abort();
+ exit(1);
}
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