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(CallingConv::ID &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 ParseUnnamedGlobal();
 147     bool ParseNamedGlobal();
 148     bool ParseGlobal(const std::string &Name, LocTy Loc, unsigned Linkage,
 149                      bool HasLinkage, unsigned Visibility);
 150     bool ParseAlias(const std::string &Name, LocTy Loc, unsigned Visibility);
 151     bool ParseStandaloneMetadata();
 152     bool ParseNamedMetadata();
 153     bool ParseMDString(MetadataBase *&S);
 154     bool ParseMDNode(MetadataBase *&N);
 155
 156     // Type Parsing.
 157     bool ParseType(PATypeHolder &Result, bool AllowVoid = false);
 158     bool ParseType(PATypeHolder &Result, LocTy &Loc, bool AllowVoid = false) {
 159       Loc = Lex.getLoc();
 160       return ParseType(Result, AllowVoid);
 161     }
 162     bool ParseTypeRec(PATypeHolder &H);
 163     bool ParseStructType(PATypeHolder &H, bool Packed);
 164     bool ParseArrayVectorType(PATypeHolder &H, bool isVector);
 165     bool ParseFunctionType(PATypeHolder &Result);
 166     PATypeHolder HandleUpRefs(const Type *Ty);
 167
 168     // Constants.
 169     bool ParseValID(ValID &ID);
 170     bool ConvertGlobalValIDToValue(const Type *Ty, ValID &ID, Constant *&V);
 171     bool ParseGlobalValue(const Type *Ty, Constant *&V);
 172     bool ParseGlobalTypeAndValue(Constant *&V);
 173     bool ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts);
 174     bool ParseMDNodeVector(SmallVectorImpl<Value*> &);
 175
 176
 177     // Function Semantic Analysis.
 178     class PerFunctionState {
 179       LLParser &P;
 180       Function &F;
 181       std::map<std::string, std::pair<Value*, LocTy> > ForwardRefVals;
 182       std::map<unsigned, std::pair<Value*, LocTy> > ForwardRefValIDs;
 183       std::vector<Value*> NumberedVals;
 184     public:
 185       PerFunctionState(LLParser &p, Function &f);
 186       ~PerFunctionState();
 187
 188       Function &getFunction() const { return F; }
 189
 190       bool VerifyFunctionComplete();
 191
 192       /// GetVal - Get a value with the specified name or ID, creating a
 193       /// forward reference record if needed.  This can return null if the value
 194       /// exists but does not have the right type.
 195       Value *GetVal(const std::string &Name, const Type *Ty, LocTy Loc);
 196       Value *GetVal(unsigned ID, const Type *Ty, LocTy Loc);
 197
 198       /// SetInstName - After an instruction is parsed and inserted into its
 199       /// basic block, this installs its name.
 200       bool SetInstName(int NameID, const std::string &NameStr, LocTy NameLoc,
 201                        Instruction *Inst);
 202
 203       /// GetBB - Get a basic block with the specified name or ID, creating a
 204       /// forward reference record if needed.  This can return null if the value
 205       /// is not a BasicBlock.
 206       BasicBlock *GetBB(const std::string &Name, LocTy Loc);
 207       BasicBlock *GetBB(unsigned ID, LocTy Loc);
 208
 209       /// DefineBB - Define the specified basic block, which is either named or
 210       /// unnamed.  If there is an error, this returns null otherwise it returns
 211       /// the block being defined.
 212       BasicBlock *DefineBB(const std::string &Name, LocTy Loc);
 213     };
 214
 215     bool ConvertValIDToValue(const Type *Ty, ValID &ID, Value *&V,
 216                              PerFunctionState &PFS);
 217
 218     bool ParseValue(const Type *Ty, Value *&V, PerFunctionState &PFS);
 219     bool ParseValue(const Type *Ty, Value *&V, LocTy &Loc,
 220                     PerFunctionState &PFS) {
 221       Loc = Lex.getLoc();
 222       return ParseValue(Ty, V, PFS);
 223     }
 224
 225     bool ParseTypeAndValue(Value *&V, PerFunctionState &PFS);
 226     bool ParseTypeAndValue(Value *&V, LocTy &Loc, PerFunctionState &PFS) {
 227       Loc = Lex.getLoc();
 228       return ParseTypeAndValue(V, PFS);
 229     }
 230
 231     struct ParamInfo {
 232       LocTy Loc;
 233       Value *V;
 234       unsigned Attrs;
 235       ParamInfo(LocTy loc, Value *v, unsigned attrs)
 236         : Loc(loc), V(v), Attrs(attrs) {}
 237     };
 238     bool ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList,
 239                             PerFunctionState &PFS);
 240
 241     // Function Parsing.
 242     struct ArgInfo {
 243       LocTy Loc;
 244       PATypeHolder Type;
 245       unsigned Attrs;
 246       std::string Name;
 247       ArgInfo(LocTy L, PATypeHolder Ty, unsigned Attr, const std::string &N)
 248         : Loc(L), Type(Ty), Attrs(Attr), Name(N) {}
 249     };
 250     bool ParseArgumentList(std::vector<ArgInfo> &ArgList,
 251                            bool &isVarArg, bool inType);
 252     bool ParseFunctionHeader(Function *&Fn, bool isDefine);
 253     bool ParseFunctionBody(Function &Fn);
 254     bool ParseBasicBlock(PerFunctionState &PFS);
 255
 256     // Instruction Parsing.
 257     bool ParseInstruction(Instruction *&Inst, BasicBlock *BB,
 258                           PerFunctionState &PFS);
 259     bool ParseCmpPredicate(unsigned &Pred, unsigned Opc);
 260
 261     bool ParseRet(Instruction *&Inst, BasicBlock *BB, PerFunctionState &PFS);
 262     bool ParseBr(Instruction *&Inst, PerFunctionState &PFS);
 263     bool ParseSwitch(Instruction *&Inst, PerFunctionState &PFS);
 264     bool ParseInvoke(Instruction *&Inst, PerFunctionState &PFS);
 265
 266     bool ParseArithmetic(Instruction *&I, PerFunctionState &PFS, unsigned Opc,
 267                          unsigned OperandType);
 268     bool ParseLogical(Instruction *&I, PerFunctionState &PFS, unsigned Opc);
 269     bool ParseCompare(Instruction *&I, PerFunctionState &PFS, unsigned Opc);
 270     bool ParseCast(Instruction *&I, PerFunctionState &PFS, unsigned Opc);
 271     bool ParseSelect(Instruction *&I, PerFunctionState &PFS);
 272     bool ParseVA_Arg(Instruction *&I, PerFunctionState &PFS);
 273     bool ParseExtractElement(Instruction *&I, PerFunctionState &PFS);
 274     bool ParseInsertElement(Instruction *&I, PerFunctionState &PFS);
 275     bool ParseShuffleVector(Instruction *&I, PerFunctionState &PFS);
 276     bool ParsePHI(Instruction *&I, PerFunctionState &PFS);
 277     bool ParseCall(Instruction *&I, PerFunctionState &PFS, bool isTail);
 278     bool ParseAlloc(Instruction *&I, PerFunctionState &PFS, unsigned Opc);
 279     bool ParseFree(Instruction *&I, PerFunctionState &PFS);
 280     bool ParseLoad(Instruction *&I, PerFunctionState &PFS, bool isVolatile);
 281     bool ParseStore(Instruction *&I, PerFunctionState &PFS, bool isVolatile);
 282     bool ParseGetResult(Instruction *&I, PerFunctionState &PFS);
 283     bool ParseGetElementPtr(Instruction *&I, PerFunctionState &PFS);
 284     bool ParseExtractValue(Instruction *&I, PerFunctionState &PFS);
 285     bool ParseInsertValue(Instruction *&I, PerFunctionState &PFS);
 286   };
 287 } // End llvm namespace
 288
 289 #endif