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