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llvm-project/llvm/lib/AsmParser/LLParser.h

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//===-- LLParser.h - Parser Class -------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the parser class for .ll files.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_ASMPARSER_LLPARSER_H
#define LLVM_ASMPARSER_LLPARSER_H
#include "LLLexer.h"
#include "llvm/Module.h"
#include "llvm/Type.h"
#include <map>
namespace llvm {
class Module;
class OpaqueType;
class Function;
class Value;
class BasicBlock;
class Instruction;
class Constant;
class GlobalValue;
class MetadataBase;
class MDString;
class MDNode;
struct ValID;
class LLParser {
public:
typedef LLLexer::LocTy LocTy;
private:
LLVMContext& Context;
LLLexer Lex;
Module *M;
// Type resolution handling data structures.
std::map<std::string, std::pair<PATypeHolder, LocTy> > ForwardRefTypes;
std::map<unsigned, std::pair<PATypeHolder, LocTy> > ForwardRefTypeIDs;
std::vector<PATypeHolder> NumberedTypes;
/// MetadataCache - This map keeps track of parsed metadata constants.
std::map<unsigned, MetadataBase *> MetadataCache;
std::map<unsigned, std::pair<MetadataBase *, LocTy> > ForwardRefMDNodes;
struct UpRefRecord {
/// Loc - This is the location of the upref.
LocTy Loc;
/// NestingLevel - The number of nesting levels that need to be popped
/// before this type is resolved.
unsigned NestingLevel;
/// LastContainedTy - This is the type at the current binding level for
/// the type. Every time we reduce the nesting level, this gets updated.
const Type *LastContainedTy;
/// UpRefTy - This is the actual opaque type that the upreference is
/// represented with.
OpaqueType *UpRefTy;
UpRefRecord(LocTy L, unsigned NL, OpaqueType *URTy)
: Loc(L), NestingLevel(NL), LastContainedTy((Type*)URTy),
UpRefTy(URTy) {}
};
std::vector<UpRefRecord> UpRefs;
// Global Value reference information.
std::map<std::string, std::pair<GlobalValue*, LocTy> > ForwardRefVals;
std::map<unsigned, std::pair<GlobalValue*, LocTy> > ForwardRefValIDs;
std::vector<GlobalValue*> NumberedVals;
public:
LLParser(MemoryBuffer *F, SourceMgr &SM, SMDiagnostic &Err, Module *m) :
Context(m->getContext()), Lex(F, SM, Err, m->getContext()), M(m) {}
bool Run();
LLVMContext& getContext() { return Context; }
private:
bool Error(LocTy L, const std::string &Msg) const {
return Lex.Error(L, Msg);
}
bool TokError(const std::string &Msg) const {
return Error(Lex.getLoc(), Msg);
}
/// GetGlobalVal - Get a value with the specified name or ID, creating a
/// forward reference record if needed. This can return null if the value
/// exists but does not have the right type.
GlobalValue *GetGlobalVal(const std::string &N, const Type *Ty, LocTy Loc);
GlobalValue *GetGlobalVal(unsigned ID, const Type *Ty, LocTy Loc);
// Helper Routines.
bool ParseToken(lltok::Kind T, const char *ErrMsg);
bool EatIfPresent(lltok::Kind T) {
if (Lex.getKind() != T) return false;
Lex.Lex();
return true;
}
bool ParseOptionalToken(lltok::Kind T, bool &Present) {
if (Lex.getKind() != T) {
Present = false;
} else {
Lex.Lex();
Present = true;
}
return false;
}
bool ParseStringConstant(std::string &Result);
bool ParseUInt32(unsigned &Val);
bool ParseUInt32(unsigned &Val, LocTy &Loc) {
Loc = Lex.getLoc();
return ParseUInt32(Val);
}
bool ParseOptionalAddrSpace(unsigned &AddrSpace);
bool ParseOptionalAttrs(unsigned &Attrs, unsigned AttrKind);
bool ParseOptionalLinkage(unsigned &Linkage, bool &HasLinkage);
bool ParseOptionalLinkage(unsigned &Linkage) {
bool HasLinkage; return ParseOptionalLinkage(Linkage, HasLinkage);
}
bool ParseOptionalVisibility(unsigned &Visibility);
bool ParseOptionalCallingConv(unsigned &CC);
bool ParseOptionalAlignment(unsigned &Alignment);
bool ParseOptionalCommaAlignment(unsigned &Alignment);
bool ParseIndexList(SmallVectorImpl<unsigned> &Indices);
// Top-Level Entities
bool ParseTopLevelEntities();
bool ValidateEndOfModule();
bool ParseTargetDefinition();
bool ParseDepLibs();
bool ParseModuleAsm();
bool ParseUnnamedType();
bool ParseNamedType();
bool ParseDeclare();
bool ParseDefine();
bool ParseGlobalType(bool &IsConstant);
bool ParseNamedGlobal();
bool ParseGlobal(const std::string &Name, LocTy Loc, unsigned Linkage,
bool HasLinkage, unsigned Visibility);
bool ParseAlias(const std::string &Name, LocTy Loc, unsigned Visibility);
bool ParseStandaloneMetadata();
bool ParseMDString(MetadataBase *&S);
bool ParseMDNode(MetadataBase *&N);
// Type Parsing.
bool ParseType(PATypeHolder &Result, bool AllowVoid = false);
bool ParseType(PATypeHolder &Result, LocTy &Loc, bool AllowVoid = false) {
Loc = Lex.getLoc();
return ParseType(Result, AllowVoid);
}
bool ParseTypeRec(PATypeHolder &H);
bool ParseStructType(PATypeHolder &H, bool Packed);
bool ParseArrayVectorType(PATypeHolder &H, bool isVector);
bool ParseFunctionType(PATypeHolder &Result);
PATypeHolder HandleUpRefs(const Type *Ty);
// Constants.
bool ParseValID(ValID &ID);
bool ConvertGlobalValIDToValue(const Type *Ty, ValID &ID, Constant *&V);
bool ParseGlobalValue(const Type *Ty, Constant *&V);
bool ParseGlobalTypeAndValue(Constant *&V);
bool ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts);
bool ParseMDNodeVector(SmallVectorImpl<Value*> &);
// Function Semantic Analysis.
class PerFunctionState {
LLParser &P;
Function &F;
std::map<std::string, std::pair<Value*, LocTy> > ForwardRefVals;
std::map<unsigned, std::pair<Value*, LocTy> > ForwardRefValIDs;
std::vector<Value*> NumberedVals;
public:
PerFunctionState(LLParser &p, Function &f);
~PerFunctionState();
Function &getFunction() const { return F; }
bool VerifyFunctionComplete();
/// GetVal - Get a value with the specified name or ID, creating a
/// forward reference record if needed. This can return null if the value
/// exists but does not have the right type.
Value *GetVal(const std::string &Name, const Type *Ty, LocTy Loc);
Value *GetVal(unsigned ID, const Type *Ty, LocTy Loc);
/// SetInstName - After an instruction is parsed and inserted into its
/// basic block, this installs its name.
bool SetInstName(int NameID, const std::string &NameStr, LocTy NameLoc,
Instruction *Inst);
/// GetBB - Get a basic block with the specified name or ID, creating a
/// forward reference record if needed. This can return null if the value
/// is not a BasicBlock.
BasicBlock *GetBB(const std::string &Name, LocTy Loc);
BasicBlock *GetBB(unsigned ID, LocTy Loc);
/// DefineBB - Define the specified basic block, which is either named or
/// unnamed. If there is an error, this returns null otherwise it returns
/// the block being defined.
BasicBlock *DefineBB(const std::string &Name, LocTy Loc);
};
bool ConvertValIDToValue(const Type *Ty, ValID &ID, Value *&V,
PerFunctionState &PFS);
bool ParseValue(const Type *Ty, Value *&V, PerFunctionState &PFS);
bool ParseValue(const Type *Ty, Value *&V, LocTy &Loc,
PerFunctionState &PFS) {
Loc = Lex.getLoc();
return ParseValue(Ty, V, PFS);
}
bool ParseTypeAndValue(Value *&V, PerFunctionState &PFS);
bool ParseTypeAndValue(Value *&V, LocTy &Loc, PerFunctionState &PFS) {
Loc = Lex.getLoc();
return ParseTypeAndValue(V, PFS);
}
struct ParamInfo {
LocTy Loc;
Value *V;
unsigned Attrs;
ParamInfo(LocTy loc, Value *v, unsigned attrs)
: Loc(loc), V(v), Attrs(attrs) {}
};
bool ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList,
PerFunctionState &PFS);
// Function Parsing.
struct ArgInfo {
LocTy Loc;
PATypeHolder Type;
unsigned Attrs;
std::string Name;
ArgInfo(LocTy L, PATypeHolder Ty, unsigned Attr, const std::string &N)
: Loc(L), Type(Ty), Attrs(Attr), Name(N) {}
};
bool ParseArgumentList(std::vector<ArgInfo> &ArgList,
bool &isVarArg, bool inType);
bool ParseFunctionHeader(Function *&Fn, bool isDefine);
bool ParseFunctionBody(Function &Fn);
bool ParseBasicBlock(PerFunctionState &PFS);
// Instruction Parsing.
bool ParseInstruction(Instruction *&Inst, BasicBlock *BB,
PerFunctionState &PFS);
bool ParseCmpPredicate(unsigned &Pred, unsigned Opc);
bool ParseRet(Instruction *&Inst, BasicBlock *BB, PerFunctionState &PFS);
bool ParseBr(Instruction *&Inst, PerFunctionState &PFS);
bool ParseSwitch(Instruction *&Inst, PerFunctionState &PFS);
bool ParseInvoke(Instruction *&Inst, PerFunctionState &PFS);
bool ParseArithmetic(Instruction *&I, PerFunctionState &PFS, unsigned Opc,
unsigned OperandType);
bool ParseLogical(Instruction *&I, PerFunctionState &PFS, unsigned Opc);
bool ParseCompare(Instruction *&I, PerFunctionState &PFS, unsigned Opc);
bool ParseCast(Instruction *&I, PerFunctionState &PFS, unsigned Opc);
bool ParseSelect(Instruction *&I, PerFunctionState &PFS);
bool ParseVA_Arg(Instruction *&I, PerFunctionState &PFS);
bool ParseExtractElement(Instruction *&I, PerFunctionState &PFS);
bool ParseInsertElement(Instruction *&I, PerFunctionState &PFS);
bool ParseShuffleVector(Instruction *&I, PerFunctionState &PFS);
bool ParsePHI(Instruction *&I, PerFunctionState &PFS);
bool ParseCall(Instruction *&I, PerFunctionState &PFS, bool isTail);
bool ParseAlloc(Instruction *&I, PerFunctionState &PFS, unsigned Opc);
bool ParseFree(Instruction *&I, PerFunctionState &PFS);
bool ParseLoad(Instruction *&I, PerFunctionState &PFS, bool isVolatile);
bool ParseStore(Instruction *&I, PerFunctionState &PFS, bool isVolatile);
bool ParseGetResult(Instruction *&I, PerFunctionState &PFS);
bool ParseGetElementPtr(Instruction *&I, PerFunctionState &PFS);
bool ParseExtractValue(Instruction *&I, PerFunctionState &PFS);
bool ParseInsertValue(Instruction *&I, PerFunctionState &PFS);
};
} // End llvm namespace
#endif
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