llvm-6502/lib/TableGen/TGParser.h
Craig Topper 73642a847d Revert r222957 "Replace std::map<K, V*> with std::map<K, V> to handle ownership and deletion of the values."
Upon further review I think the MultiClass is being copied into the map instead of being moved due to the copy constructor on the nested Record type. This ultimately got exposed when the vector in DefPrototype vector was changed to hold unique_ptrs in another commit. This caused gcc 4.7 to fail due to the use of the copy constructor on unique_ptr with the error pointing back to one of the insert calls from this commit. Not sure why clang was able to build.

This reverts commit 710cdf729f.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222971 91177308-0d34-0410-b5e6-96231b3b80d8
2014-11-30 01:20:17 +00:00

195 lines
6.8 KiB
C++

//===- TGParser.h - Parser for TableGen Files -------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This class represents the Parser for tablegen files.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TABLEGEN_TGPARSER_H
#define LLVM_LIB_TABLEGEN_TGPARSER_H
#include "TGLexer.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/TableGen/Error.h"
#include "llvm/TableGen/Record.h"
#include <map>
namespace llvm {
class Record;
class RecordVal;
class RecordKeeper;
class RecTy;
class Init;
struct MultiClass;
struct SubClassReference;
struct SubMultiClassReference;
struct LetRecord {
std::string Name;
std::vector<unsigned> Bits;
Init *Value;
SMLoc Loc;
LetRecord(const std::string &N, const std::vector<unsigned> &B, Init *V,
SMLoc L)
: Name(N), Bits(B), Value(V), Loc(L) {
}
};
/// ForeachLoop - Record the iteration state associated with a for loop.
/// This is used to instantiate items in the loop body.
struct ForeachLoop {
VarInit *IterVar;
ListInit *ListValue;
ForeachLoop(VarInit *IVar, ListInit *LValue)
: IterVar(IVar), ListValue(LValue) {}
};
class TGParser {
TGLexer Lex;
std::vector<std::vector<LetRecord> > LetStack;
std::map<std::string, MultiClass*> MultiClasses;
/// Loops - Keep track of any foreach loops we are within.
///
typedef std::vector<ForeachLoop> LoopVector;
LoopVector Loops;
/// CurMultiClass - If we are parsing a 'multiclass' definition, this is the
/// current value.
MultiClass *CurMultiClass;
// Record tracker
RecordKeeper &Records;
unsigned AnonCounter;
// A "named boolean" indicating how to parse identifiers. Usually
// identifiers map to some existing object but in special cases
// (e.g. parsing def names) no such object exists yet because we are
// in the middle of creating in. For those situations, allow the
// parser to ignore missing object errors.
enum IDParseMode {
ParseValueMode, // We are parsing a value we expect to look up.
ParseNameMode, // We are parsing a name of an object that does not yet
// exist.
ParseForeachMode // We are parsing a foreach init.
};
public:
TGParser(SourceMgr &SrcMgr, RecordKeeper &records)
: Lex(SrcMgr), CurMultiClass(nullptr), Records(records), AnonCounter(0) {}
/// ParseFile - Main entrypoint for parsing a tblgen file. These parser
/// routines return true on error, or false on success.
bool ParseFile();
bool Error(SMLoc L, const Twine &Msg) const {
PrintError(L, Msg);
return true;
}
bool TokError(const Twine &Msg) const {
return Error(Lex.getLoc(), Msg);
}
const TGLexer::DependenciesMapTy &getDependencies() const {
return Lex.getDependencies();
}
private: // Semantic analysis methods.
bool AddValue(Record *TheRec, SMLoc Loc, const RecordVal &RV);
bool SetValue(Record *TheRec, SMLoc Loc, Init *ValName,
const std::vector<unsigned> &BitList, Init *V);
bool SetValue(Record *TheRec, SMLoc Loc, const std::string &ValName,
const std::vector<unsigned> &BitList, Init *V) {
return SetValue(TheRec, Loc, StringInit::get(ValName), BitList, V);
}
bool AddSubClass(Record *Rec, SubClassReference &SubClass);
bool AddSubMultiClass(MultiClass *CurMC,
SubMultiClassReference &SubMultiClass);
std::string GetNewAnonymousName();
// IterRecord: Map an iterator name to a value.
struct IterRecord {
VarInit *IterVar;
Init *IterValue;
IterRecord(VarInit *Var, Init *Val) : IterVar(Var), IterValue(Val) {}
};
// IterSet: The set of all iterator values at some point in the
// iteration space.
typedef std::vector<IterRecord> IterSet;
bool ProcessForeachDefs(Record *CurRec, SMLoc Loc);
bool ProcessForeachDefs(Record *CurRec, SMLoc Loc, IterSet &IterVals);
private: // Parser methods.
bool ParseObjectList(MultiClass *MC = nullptr);
bool ParseObject(MultiClass *MC);
bool ParseClass();
bool ParseMultiClass();
Record *InstantiateMulticlassDef(MultiClass &MC,
Record *DefProto,
Init *&DefmPrefix,
SMRange DefmPrefixRange);
bool ResolveMulticlassDefArgs(MultiClass &MC,
Record *DefProto,
SMLoc DefmPrefixLoc,
SMLoc SubClassLoc,
const std::vector<Init *> &TArgs,
std::vector<Init *> &TemplateVals,
bool DeleteArgs);
bool ResolveMulticlassDef(MultiClass &MC,
Record *CurRec,
Record *DefProto,
SMLoc DefmPrefixLoc);
bool ParseDefm(MultiClass *CurMultiClass);
bool ParseDef(MultiClass *CurMultiClass);
bool ParseForeach(MultiClass *CurMultiClass);
bool ParseTopLevelLet(MultiClass *CurMultiClass);
std::vector<LetRecord> ParseLetList();
bool ParseObjectBody(Record *CurRec);
bool ParseBody(Record *CurRec);
bool ParseBodyItem(Record *CurRec);
bool ParseTemplateArgList(Record *CurRec);
Init *ParseDeclaration(Record *CurRec, bool ParsingTemplateArgs);
VarInit *ParseForeachDeclaration(ListInit *&ForeachListValue);
SubClassReference ParseSubClassReference(Record *CurRec, bool isDefm);
SubMultiClassReference ParseSubMultiClassReference(MultiClass *CurMC);
Init *ParseIDValue(Record *CurRec, const std::string &Name, SMLoc NameLoc,
IDParseMode Mode = ParseValueMode);
Init *ParseSimpleValue(Record *CurRec, RecTy *ItemType = nullptr,
IDParseMode Mode = ParseValueMode);
Init *ParseValue(Record *CurRec, RecTy *ItemType = nullptr,
IDParseMode Mode = ParseValueMode);
std::vector<Init*> ParseValueList(Record *CurRec, Record *ArgsRec = nullptr,
RecTy *EltTy = nullptr);
std::vector<std::pair<llvm::Init*, std::string> > ParseDagArgList(Record *);
bool ParseOptionalRangeList(std::vector<unsigned> &Ranges);
bool ParseOptionalBitList(std::vector<unsigned> &Ranges);
std::vector<unsigned> ParseRangeList();
bool ParseRangePiece(std::vector<unsigned> &Ranges);
RecTy *ParseType();
Init *ParseOperation(Record *CurRec, RecTy *ItemType);
RecTy *ParseOperatorType();
Init *ParseObjectName(MultiClass *CurMultiClass);
Record *ParseClassID();
MultiClass *ParseMultiClassID();
bool ApplyLetStack(Record *CurRec);
};
} // end namespace llvm
#endif