blob: dda880838117eaa5d0d0f6ba0699ff32aa45379b [file] [log] [blame]
//===-- 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.
#include "LLLexer.h"
#include "llvm/Attributes.h"
#include "llvm/Instructions.h"
#include "llvm/Module.h"
#include "llvm/Type.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/Support/ValueHandle.h"
#include <map>
namespace llvm {
class Module;
class OpaqueType;
class Function;
class Value;
class BasicBlock;
class Instruction;
class Constant;
class GlobalValue;
class MDString;
class MDNode;
class StructType;
/// ValID - Represents a reference of a definition of some sort with no type.
/// There are several cases where we have to parse the value but where the
/// type can depend on later context. This may either be a numeric reference
/// or a symbolic (%var) reference. This is just a discriminated union.
struct ValID {
enum {
t_LocalID, t_GlobalID, // ID in UIntVal.
t_LocalName, t_GlobalName, // Name in StrVal.
t_APSInt, t_APFloat, // Value in APSIntVal/APFloatVal.
t_Null, t_Undef, t_Zero, // No value.
t_EmptyArray, // No value: []
t_Constant, // Value in ConstantVal.
t_InlineAsm, // Value in StrVal/StrVal2/UIntVal.
t_MDNode, // Value in MDNodeVal.
t_MDString, // Value in MDStringVal.
t_ConstantStruct, // Value in ConstantStructElts.
t_PackedConstantStruct // Value in ConstantStructElts.
} Kind;
LLLexer::LocTy Loc;
unsigned UIntVal;
std::string StrVal, StrVal2;
APFloat APFloatVal;
Constant *ConstantVal;
MDNode *MDNodeVal;
MDString *MDStringVal;
Constant **ConstantStructElts;
ValID() : Kind(t_LocalID), APFloatVal(0.0) {}
~ValID() {
if (Kind == t_ConstantStruct || Kind == t_PackedConstantStruct)
delete [] ConstantStructElts;
bool operator<(const ValID &RHS) const {
if (Kind == t_LocalID || Kind == t_GlobalID)
return UIntVal < RHS.UIntVal;
assert((Kind == t_LocalName || Kind == t_GlobalName ||
Kind == t_ConstantStruct || Kind == t_PackedConstantStruct) &&
"Ordering not defined for this ValID kind yet");
return StrVal < RHS.StrVal;
class LLParser {
typedef LLLexer::LocTy LocTy;
LLVMContext &Context;
LLLexer Lex;
Module *M;
// Instruction metadata resolution. Each instruction can have a list of
// MDRef info associated with them.
// The simpler approach of just creating temporary MDNodes and then calling
// RAUW on them when the definition is processed doesn't work because some
// instruction metadata kinds, such as dbg, get stored in the IR in an
// "optimized" format which doesn't participate in the normal value use
// lists. This means that RAUW doesn't work, even on temporary MDNodes
// which otherwise support RAUW. Instead, we defer resolving MDNode
// references until the definitions have been processed.
struct MDRef {
SMLoc Loc;
unsigned MDKind, MDSlot;
DenseMap<Instruction*, std::vector<MDRef> > ForwardRefInstMetadata;
// Type resolution handling data structures. The location is set when we
// have processed a use of the type but not a definition yet.
StringMap<std::pair<Type*, LocTy> > NamedTypes;
std::vector<std::pair<Type*, LocTy> > NumberedTypes;
std::vector<TrackingVH<MDNode> > NumberedMetadata;
std::map<unsigned, std::pair<TrackingVH<MDNode>, LocTy> > ForwardRefMDNodes;
// 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;
// References to blockaddress. The key is the function ValID, the value is
// a list of references to blocks in that function.
std::map<ValID, std::vector<std::pair<ValID, GlobalValue*> > >
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; }
bool Error(LocTy L, const Twine &Msg) const {
return Lex.Error(L, Msg);
bool TokError(const Twine &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, Type *Ty, LocTy Loc);
GlobalValue *GetGlobalVal(unsigned ID, 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;
return true;
bool ParseOptionalToken(lltok::Kind T, bool &Present, LocTy *Loc = 0) {
if (Lex.getKind() != T) {
Present = false;
} else {
if (Loc)
*Loc = Lex.getLoc();
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(Attributes &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(CallingConv::ID &CC);
bool ParseOptionalAlignment(unsigned &Alignment);
bool ParseScopeAndOrdering(bool isAtomic, SynchronizationScope &Scope,
AtomicOrdering &Ordering);
bool ParseOptionalStackAlignment(unsigned &Alignment);
bool ParseOptionalCommaAlign(unsigned &Alignment, bool &AteExtraComma);
bool ParseIndexList(SmallVectorImpl<unsigned> &Indices,bool &AteExtraComma);
bool ParseIndexList(SmallVectorImpl<unsigned> &Indices) {
bool AteExtraComma;
if (ParseIndexList(Indices, AteExtraComma)) return true;
if (AteExtraComma)
return TokError("expected index");
return false;
// 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 ParseUnnamedGlobal();
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 ParseNamedMetadata();
bool ParseMDString(MDString *&Result);
bool ParseMDNodeID(MDNode *&Result);
bool ParseMDNodeID(MDNode *&Result, unsigned &SlotNo);
// Type Parsing.
bool ParseType(Type *&Result, bool AllowVoid = false);
bool ParseType(Type *&Result, LocTy &Loc, bool AllowVoid = false) {
Loc = Lex.getLoc();
return ParseType(Result, AllowVoid);
bool ParseAnonStructType(Type *&Result, bool Packed);
bool ParseStructBody(SmallVectorImpl<Type*> &Body);
bool ParseStructDefinition(SMLoc TypeLoc, StringRef Name,
std::pair<Type*, LocTy> &Entry,
Type *&ResultTy);
bool ParseArrayVectorType(Type *&Result, bool isVector);
bool ParseFunctionType(Type *&Result);
// 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;
/// FunctionNumber - If this is an unnamed function, this is the slot
/// number of it, otherwise it is -1.
int FunctionNumber;
PerFunctionState(LLParser &p, Function &f, int FunctionNumber);
Function &getFunction() const { return F; }
bool FinishFunction();
/// 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, Type *Ty, LocTy Loc);
Value *GetVal(unsigned ID, 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(Type *Ty, ValID &ID, Value *&V,
PerFunctionState *PFS);
bool ParseValue(Type *Ty, Value *&V, PerFunctionState *PFS);
bool ParseValue(Type *Ty, Value *&V, PerFunctionState &PFS) {
return ParseValue(Ty, V, &PFS);
bool ParseValue(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, PerFunctionState &PFS) {
return ParseTypeAndValue(V, &PFS);
bool ParseTypeAndValue(Value *&V, LocTy &Loc, PerFunctionState &PFS) {
Loc = Lex.getLoc();
return ParseTypeAndValue(V, PFS);
bool ParseTypeAndBasicBlock(BasicBlock *&BB, LocTy &Loc,
PerFunctionState &PFS);
bool ParseTypeAndBasicBlock(BasicBlock *&BB, PerFunctionState &PFS) {
LocTy Loc;
return ParseTypeAndBasicBlock(BB, Loc, PFS);
struct ParamInfo {
LocTy Loc;
Value *V;
Attributes Attrs;
ParamInfo(LocTy loc, Value *v, Attributes attrs)
: Loc(loc), V(v), Attrs(attrs) {}
bool ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList,
PerFunctionState &PFS);
// Constant Parsing.
bool ParseValID(ValID &ID, PerFunctionState *PFS = NULL);
bool ParseGlobalValue(Type *Ty, Constant *&V);
bool ParseGlobalTypeAndValue(Constant *&V);
bool ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts);
bool ParseMetadataListValue(ValID &ID, PerFunctionState *PFS);
bool ParseMetadataValue(ValID &ID, PerFunctionState *PFS);
bool ParseMDNodeVector(SmallVectorImpl<Value*> &, PerFunctionState *PFS);
bool ParseInstructionMetadata(Instruction *Inst, PerFunctionState *PFS);
// Function Parsing.
struct ArgInfo {
LocTy Loc;
Type *Ty;
Attributes Attrs;
std::string Name;
ArgInfo(LocTy L, Type *ty, Attributes Attr, const std::string &N)
: Loc(L), Ty(ty), Attrs(Attr), Name(N) {}
bool ParseArgumentList(SmallVectorImpl<ArgInfo> &ArgList, bool &isVarArg);
bool ParseFunctionHeader(Function *&Fn, bool isDefine);
bool ParseFunctionBody(Function &Fn);
bool ParseBasicBlock(PerFunctionState &PFS);
// Instruction Parsing. Each instruction parsing routine can return with a
// normal result, an error result, or return having eaten an extra comma.
enum InstResult { InstNormal = 0, InstError = 1, InstExtraComma = 2 };
int 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 ParseIndirectBr(Instruction *&Inst, PerFunctionState &PFS);
bool ParseInvoke(Instruction *&Inst, PerFunctionState &PFS);
bool ParseResume(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);
int ParsePHI(Instruction *&I, PerFunctionState &PFS);
bool ParseLandingPad(Instruction *&I, PerFunctionState &PFS);
bool ParseCall(Instruction *&I, PerFunctionState &PFS, bool isTail);
int ParseAlloc(Instruction *&I, PerFunctionState &PFS);
int ParseLoad(Instruction *&I, PerFunctionState &PFS);
int ParseStore(Instruction *&I, PerFunctionState &PFS);
int ParseCmpXchg(Instruction *&I, PerFunctionState &PFS);
int ParseAtomicRMW(Instruction *&I, PerFunctionState &PFS);
int ParseFence(Instruction *&I, PerFunctionState &PFS);
int ParseGetElementPtr(Instruction *&I, PerFunctionState &PFS);
int ParseExtractValue(Instruction *&I, PerFunctionState &PFS);
int ParseInsertValue(Instruction *&I, PerFunctionState &PFS);
bool ResolveForwardRefBlockAddresses(Function *TheFn,
std::vector<std::pair<ValID, GlobalValue*> > &Refs,
PerFunctionState *PFS);
} // End llvm namespace