lib/AsmParser/LLParser.h

   1 //===-- LLParser.h - Parser Class -------------------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 //  This file defines the parser class for .ll files.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_ASMPARSER_LLPARSER_H
  15 #define LLVM_ASMPARSER_LLPARSER_H
  16
  17 #include "LLLexer.h"
  18 #include "llvm/Module.h"
  19 #include "llvm/Type.h"
  20 #include <map>
  21
  22 namespace llvm {
  23   class Module;
  24   class OpaqueType;
  25   class Function;
  26   class Value;
  27   class BasicBlock;
  28   class Instruction;
  29   class Constant;
  30   class GlobalValue;
  31   class MetadataBase;
  32   class MDString;
  33   class MDNode;
  34   struct ValID;
  35
  36   class LLParser {
  37   public:
  38     typedef LLLexer::LocTy LocTy;
  39   private:
  40     LLVMContext& Context;
  41     LLLexer Lex;
  42     Module *M;
  43
  44     // Type resolution handling data structures.
  45     std::map<std::string, std::pair<PATypeHolder, LocTy> > ForwardRefTypes;
  46     std::map<unsigned, std::pair<PATypeHolder, LocTy> > ForwardRefTypeIDs;
  47     std::vector<PATypeHolder> NumberedTypes;
  48     /// MetadataCache - This map keeps track of parsed metadata constants.
  49     std::map<unsigned, MetadataBase *> MetadataCache;
  50     std::map<unsigned, std::pair<MetadataBase *, LocTy> > ForwardRefMDNodes;
  51
  52     struct UpRefRecord {
  53       /// Loc - This is the location of the upref.
  54       LocTy Loc;
  55
  56       /// NestingLevel - The number of nesting levels that need to be popped
  57       /// before this type is resolved.
  58       unsigned NestingLevel;
  59
  60       /// LastContainedTy - This is the type at the current binding level for
  61       /// the type.  Every time we reduce the nesting level, this gets updated.
  62       const Type *LastContainedTy;
  63
  64       /// UpRefTy - This is the actual opaque type that the upreference is
  65       /// represented with.
  66       OpaqueType *UpRefTy;
  67
  68       UpRefRecord(LocTy L, unsigned NL, OpaqueType *URTy)
  69         : Loc(L), NestingLevel(NL), LastContainedTy((Type*)URTy),
  70           UpRefTy(URTy) {}
  71     };
  72     std::vector<UpRefRecord> UpRefs;
  73
  74     // Global Value reference information.
  75     std::map<std::string, std::pair<GlobalValue*, LocTy> > ForwardRefVals;
  76     std::map<unsigned, std::pair<GlobalValue*, LocTy> > ForwardRefValIDs;
  77     std::vector<GlobalValue*> NumberedVals;
  78   public:
  79     LLParser(MemoryBuffer *F, SourceMgr &SM, SMDiagnostic &Err, Module *m) :
  80       Context(m->getContext()), Lex(F, SM, Err, m->getContext()), M(m) {}
  81     bool Run();
  82
  83     LLVMContext& getContext() { return Context; }
  84
  85   private:
  86
  87     bool Error(LocTy L, const std::string &Msg) const {
  88       return Lex.Error(L, Msg);
  89     }
  90     bool TokError(const std::string &Msg) const {
  91       return Error(Lex.getLoc(), Msg);
  92     }
  93
  94     /// GetGlobalVal - Get a value with the specified name or ID, creating a
  95     /// forward reference record if needed.  This can return null if the value
  96     /// exists but does not have the right type.
  97     GlobalValue *GetGlobalVal(const std::string &N, const Type *Ty, LocTy Loc);
  98     GlobalValue *GetGlobalVal(unsigned ID, const Type *Ty, LocTy Loc);
  99
 100     // Helper Routines.
 101     bool ParseToken(lltok::Kind T, const char *ErrMsg);
 102     bool EatIfPresent(lltok::Kind T) {
 103       if (Lex.getKind() != T) return false;
 104       Lex.Lex();
 105       return true;
 106     }
 107     bool ParseOptionalToken(lltok::Kind T, bool &Present) {
 108       if (Lex.getKind() != T) {
 109         Present = false;
 110       } else {
 111         Lex.Lex();
 112         Present = true;
 113       }
 114       return false;
 115     }
 116     bool ParseStringConstant(std::string &Result);
 117     bool ParseUInt32(unsigned &Val);
 118     bool ParseUInt32(unsigned &Val, LocTy &Loc) {
 119       Loc = Lex.getLoc();
 120       return ParseUInt32(Val);
 121     }
 122     bool ParseOptionalAddrSpace(unsigned &AddrSpace);
 123     bool ParseOptionalAttrs(unsigned &Attrs, unsigned AttrKind);
 124     bool ParseOptionalLinkage(unsigned &Linkage, bool &HasLinkage);
 125     bool ParseOptionalLinkage(unsigned &Linkage) {
 126       bool HasLinkage; return ParseOptionalLinkage(Linkage, HasLinkage);
 127     }
 128     bool ParseOptionalVisibility(unsigned &Visibility);
 129     bool ParseOptionalCallingConv(unsigned &CC);
 130     bool ParseOptionalAlignment(unsigned &Alignment);
 131     bool ParseOptionalCommaAlignment(unsigned &Alignment);
 132     bool ParseIndexList(SmallVectorImpl<unsigned> &Indices);
 133
 134     // Top-Level Entities
 135     bool ParseTopLevelEntities();
 136     bool ValidateEndOfModule();
 137     bool ParseTargetDefinition();
 138     bool ParseDepLibs();
 139     bool ParseModuleAsm();
 140     bool ParseUnnamedType();
 141     bool ParseNamedType();
 142     bool ParseDeclare();
 143     bool ParseDefine();
 144
 145     bool ParseGlobalType(bool &IsConstant);
 146     bool ParseNamedGlobal();
 147     bool ParseGlobal(const std::string &Name, LocTy Loc, unsigned Linkage,
 148                      bool HasLinkage, unsigned Visibility);
 149     bool ParseAlias(const std::string &Name, LocTy Loc, unsigned Visibility);
 150     bool ParseStandaloneMetadata();
 151     bool ParseNamedMetadata();
 152     bool ParseMDString(MetadataBase *&S);
 153     bool ParseMDNode(MetadataBase *&N);
 154
 155     // Type Parsing.
 156     bool ParseType(PATypeHolder &Result, bool AllowVoid = false);
 157     bool ParseType(PATypeHolder &Result, LocTy &Loc, bool AllowVoid = false) {
 158       Loc = Lex.getLoc();
 159       return ParseType(Result, AllowVoid);
 160     }
 161     bool ParseTypeRec(PATypeHolder &H);
 162     bool ParseStructType(PATypeHolder &H, bool Packed);
 163     bool ParseArrayVectorType(PATypeHolder &H, bool isVector);
 164     bool ParseFunctionType(PATypeHolder &Result);
 165     PATypeHolder HandleUpRefs(const Type *Ty);
 166
 167     // Constants.
 168     bool ParseValID(ValID &ID);
 169     bool ConvertGlobalValIDToValue(const Type *Ty, ValID &ID, Constant *&V);
 170     bool ParseGlobalValue(const Type *Ty, Constant *&V);
 171     bool ParseGlobalTypeAndValue(Constant *&V);
 172     bool ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts);
 173     bool ParseMDNodeVector(SmallVectorImpl<Value*> &);
 174
 175
 176     // Function Semantic Analysis.
 177     class PerFunctionState {
 178       LLParser &P;
 179       Function &F;
 180       std::map<std::string, std::pair<Value*, LocTy> > ForwardRefVals;
 181       std::map<unsigned, std::pair<Value*, LocTy> > ForwardRefValIDs;
 182       std::vector<Value*> NumberedVals;
 183     public:
 184       PerFunctionState(LLParser &p, Function &f);
 185       ~PerFunctionState();
 186
 187       Function &getFunction() const { return F; }
 188
 189       bool VerifyFunctionComplete();
 190
 191       /// GetVal - Get a value with the specified name or ID, creating a
 192       /// forward reference record if needed.  This can return null if the value
 193       /// exists but does not have the right type.
 194       Value *GetVal(const std::string &Name, const Type *Ty, LocTy Loc);
 195       Value *GetVal(unsigned ID, const Type *Ty, LocTy Loc);
 196
 197       /// SetInstName - After an instruction is parsed and inserted into its
 198       /// basic block, this installs its name.
 199       bool SetInstName(int NameID, const std::string &NameStr, LocTy NameLoc,
 200                        Instruction *Inst);
 201
 202       /// GetBB - Get a basic block with the specified name or ID, creating a
 203       /// forward reference record if needed.  This can return null if the value
 204       /// is not a BasicBlock.
 205       BasicBlock *GetBB(const std::string &Name, LocTy Loc);
 206       BasicBlock *GetBB(unsigned ID, LocTy Loc);
 207
 208       /// DefineBB - Define the specified basic block, which is either named or
 209       /// unnamed.  If there is an error, this returns null otherwise it returns
 210       /// the block being defined.
 211       BasicBlock *DefineBB(const std::string &Name, LocTy Loc);
 212     };
 213
 214     bool ConvertValIDToValue(const Type *Ty, ValID &ID, Value *&V,
 215                              PerFunctionState &PFS);
 216
 217     bool ParseValue(const Type *Ty, Value *&V, PerFunctionState &PFS);
 218     bool ParseValue(const Type *Ty, Value *&V, LocTy &Loc,
 219                     PerFunctionState &PFS) {
 220       Loc = Lex.getLoc();
 221       return ParseValue(Ty, V, PFS);
 222     }
 223
 224     bool ParseTypeAndValue(Value *&V, PerFunctionState &PFS);
 225     bool ParseTypeAndValue(Value *&V, LocTy &Loc, PerFunctionState &PFS) {
 226       Loc = Lex.getLoc();
 227       return ParseTypeAndValue(V, PFS);
 228     }
 229
 230     struct ParamInfo {
 231       LocTy Loc;
 232       Value *V;
 233       unsigned Attrs;
 234       ParamInfo(LocTy loc, Value *v, unsigned attrs)
 235         : Loc(loc), V(v), Attrs(attrs) {}
 236     };
 237     bool ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList,
 238                             PerFunctionState &PFS);
 239
 240     // Function Parsing.
 241     struct ArgInfo {
 242       LocTy Loc;
 243       PATypeHolder Type;
 244       unsigned Attrs;
 245       std::string Name;
 246       ArgInfo(LocTy L, PATypeHolder Ty, unsigned Attr, const std::string &N)
 247         : Loc(L), Type(Ty), Attrs(Attr), Name(N) {}
 248     };
 249     bool ParseArgumentList(std::vector<ArgInfo> &ArgList,
 250                            bool &isVarArg, bool inType);
 251     bool ParseFunctionHeader(Function *&Fn, bool isDefine);
 252     bool ParseFunctionBody(Function &Fn);
 253     bool ParseBasicBlock(PerFunctionState &PFS);
 254
 255     // Instruction Parsing.
 256     bool ParseInstruction(Instruction *&Inst, BasicBlock *BB,
 257                           PerFunctionState &PFS);
 258     bool ParseCmpPredicate(unsigned &Pred, unsigned Opc);
 259
 260     bool ParseRet(Instruction *&Inst, BasicBlock *BB, PerFunctionState &PFS);
 261     bool ParseBr(Instruction *&Inst, PerFunctionState &PFS);
 262     bool ParseSwitch(Instruction *&Inst, PerFunctionState &PFS);
 263     bool ParseInvoke(Instruction *&Inst, PerFunctionState &PFS);
 264
 265     bool ParseArithmetic(Instruction *&I, PerFunctionState &PFS, unsigned Opc,
 266                          unsigned OperandType);
 267     bool ParseLogical(Instruction *&I, PerFunctionState &PFS, unsigned Opc);
 268     bool ParseCompare(Instruction *&I, PerFunctionState &PFS, unsigned Opc);
 269     bool ParseCast(Instruction *&I, PerFunctionState &PFS, unsigned Opc);
 270     bool ParseSelect(Instruction *&I, PerFunctionState &PFS);
 271     bool ParseVA_Arg(Instruction *&I, PerFunctionState &PFS);
 272     bool ParseExtractElement(Instruction *&I, PerFunctionState &PFS);
 273     bool ParseInsertElement(Instruction *&I, PerFunctionState &PFS);
 274     bool ParseShuffleVector(Instruction *&I, PerFunctionState &PFS);
 275     bool ParsePHI(Instruction *&I, PerFunctionState &PFS);
 276     bool ParseCall(Instruction *&I, PerFunctionState &PFS, bool isTail);
 277     bool ParseAlloc(Instruction *&I, PerFunctionState &PFS, unsigned Opc);
 278     bool ParseFree(Instruction *&I, PerFunctionState &PFS);
 279     bool ParseLoad(Instruction *&I, PerFunctionState &PFS, bool isVolatile);
 280     bool ParseStore(Instruction *&I, PerFunctionState &PFS, bool isVolatile);
 281     bool ParseGetResult(Instruction *&I, PerFunctionState &PFS);
 282     bool ParseGetElementPtr(Instruction *&I, PerFunctionState &PFS);
 283     bool ParseExtractValue(Instruction *&I, PerFunctionState &PFS);
 284     bool ParseInsertValue(Instruction *&I, PerFunctionState &PFS);
 285   };
 286 } // End llvm namespace
 287
 288 #endif