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	Extract most of `PARSE_MD_FIELD()` into a function. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226539 91177308-0d34-0410-b5e6-96231b3b80d8
		
			
				
	
	
		
			495 lines
		
	
	
		
			19 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
			
		
		
	
	
			495 lines
		
	
	
		
			19 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
| //===-- LLParser.h - Parser Class -------------------------------*- C++ -*-===//
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| //
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| //                     The LLVM Compiler Infrastructure
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| //
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| // This file is distributed under the University of Illinois Open Source
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| // License. See LICENSE.TXT for details.
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| //
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| //===----------------------------------------------------------------------===//
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| //
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| //  This file defines the parser class for .ll files.
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| //
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| //===----------------------------------------------------------------------===//
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| 
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| #ifndef LLVM_LIB_ASMPARSER_LLPARSER_H
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| #define LLVM_LIB_ASMPARSER_LLPARSER_H
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| 
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| #include "LLLexer.h"
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| #include "llvm/ADT/DenseMap.h"
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| #include "llvm/ADT/StringMap.h"
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| #include "llvm/IR/Attributes.h"
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| #include "llvm/IR/Instructions.h"
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| #include "llvm/IR/Module.h"
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| #include "llvm/IR/Operator.h"
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| #include "llvm/IR/Type.h"
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| #include "llvm/IR/ValueHandle.h"
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| #include <map>
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| 
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| namespace llvm {
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|   class Module;
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|   class OpaqueType;
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|   class Function;
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|   class Value;
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|   class BasicBlock;
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|   class Instruction;
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|   class Constant;
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|   class GlobalValue;
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|   class Comdat;
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|   class MDString;
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|   class MDNode;
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|   class StructType;
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| 
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|   /// ValID - Represents a reference of a definition of some sort with no type.
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|   /// There are several cases where we have to parse the value but where the
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|   /// type can depend on later context.  This may either be a numeric reference
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|   /// or a symbolic (%var) reference.  This is just a discriminated union.
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|   struct ValID {
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|     enum {
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|       t_LocalID, t_GlobalID,      // ID in UIntVal.
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|       t_LocalName, t_GlobalName,  // Name in StrVal.
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|       t_APSInt, t_APFloat,        // Value in APSIntVal/APFloatVal.
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|       t_Null, t_Undef, t_Zero,    // No value.
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|       t_EmptyArray,               // No value:  []
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|       t_Constant,                 // Value in ConstantVal.
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|       t_InlineAsm,                // Value in StrVal/StrVal2/UIntVal.
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|       t_ConstantStruct,           // Value in ConstantStructElts.
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|       t_PackedConstantStruct      // Value in ConstantStructElts.
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|     } Kind;
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| 
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|     LLLexer::LocTy Loc;
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|     unsigned UIntVal;
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|     std::string StrVal, StrVal2;
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|     APSInt APSIntVal;
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|     APFloat APFloatVal;
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|     Constant *ConstantVal;
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|     Constant **ConstantStructElts;
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| 
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|     ValID() : Kind(t_LocalID), APFloatVal(0.0) {}
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|     ~ValID() {
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|       if (Kind == t_ConstantStruct || Kind == t_PackedConstantStruct)
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|         delete [] ConstantStructElts;
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|     }
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| 
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|     bool operator<(const ValID &RHS) const {
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|       if (Kind == t_LocalID || Kind == t_GlobalID)
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|         return UIntVal < RHS.UIntVal;
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|       assert((Kind == t_LocalName || Kind == t_GlobalName ||
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|               Kind == t_ConstantStruct || Kind == t_PackedConstantStruct) &&
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|              "Ordering not defined for this ValID kind yet");
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|       return StrVal < RHS.StrVal;
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|     }
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|   };
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| 
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|   /// Structure to represent an optional metadata field.
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|   template <class FieldTy> struct MDFieldImpl {
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|     typedef MDFieldImpl ImplTy;
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|     FieldTy Val;
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|     bool Seen;
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| 
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|     void assign(FieldTy Val) {
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|       Seen = true;
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|       this->Val = Val;
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|     }
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| 
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|     explicit MDFieldImpl(FieldTy Default) : Val(Default), Seen(false) {}
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|   };
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|   template <class NumTy> struct MDUnsignedField : public MDFieldImpl<NumTy> {
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|     typedef typename MDUnsignedField::ImplTy ImplTy;
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|     NumTy Max;
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| 
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|     MDUnsignedField(NumTy Default = 0,
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|                     NumTy Max = std::numeric_limits<NumTy>::max())
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|         : ImplTy(Default), Max(Max) {}
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|   };
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|   struct MDField : public MDFieldImpl<Metadata *> {
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|     MDField() : ImplTy(nullptr) {}
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|   };
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| 
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|   class LLParser {
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|   public:
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|     typedef LLLexer::LocTy LocTy;
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|   private:
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|     LLVMContext &Context;
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|     LLLexer Lex;
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|     Module *M;
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| 
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|     // Instruction metadata resolution.  Each instruction can have a list of
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|     // MDRef info associated with them.
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|     //
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|     // The simpler approach of just creating temporary MDNodes and then calling
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|     // RAUW on them when the definition is processed doesn't work because some
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|     // instruction metadata kinds, such as dbg, get stored in the IR in an
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|     // "optimized" format which doesn't participate in the normal value use
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|     // lists. This means that RAUW doesn't work, even on temporary MDNodes
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|     // which otherwise support RAUW. Instead, we defer resolving MDNode
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|     // references until the definitions have been processed.
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|     struct MDRef {
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|       SMLoc Loc;
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|       unsigned MDKind, MDSlot;
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|     };
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| 
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|     SmallVector<Instruction*, 64> InstsWithTBAATag;
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| 
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|     // Type resolution handling data structures.  The location is set when we
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|     // have processed a use of the type but not a definition yet.
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|     StringMap<std::pair<Type*, LocTy> > NamedTypes;
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|     std::vector<std::pair<Type*, LocTy> > NumberedTypes;
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| 
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|     std::vector<TrackingMDNodeRef> NumberedMetadata;
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|     std::map<unsigned, std::pair<TempMDTuple, LocTy>> ForwardRefMDNodes;
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| 
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|     // Global Value reference information.
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|     std::map<std::string, std::pair<GlobalValue*, LocTy> > ForwardRefVals;
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|     std::map<unsigned, std::pair<GlobalValue*, LocTy> > ForwardRefValIDs;
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|     std::vector<GlobalValue*> NumberedVals;
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| 
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|     // Comdat forward reference information.
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|     std::map<std::string, LocTy> ForwardRefComdats;
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| 
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|     // References to blockaddress.  The key is the function ValID, the value is
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|     // a list of references to blocks in that function.
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|     std::map<ValID, std::map<ValID, GlobalValue *>> ForwardRefBlockAddresses;
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|     class PerFunctionState;
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|     /// Reference to per-function state to allow basic blocks to be
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|     /// forward-referenced by blockaddress instructions within the same
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|     /// function.
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|     PerFunctionState *BlockAddressPFS;
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| 
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|     // Attribute builder reference information.
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|     std::map<Value*, std::vector<unsigned> > ForwardRefAttrGroups;
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|     std::map<unsigned, AttrBuilder> NumberedAttrBuilders;
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| 
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|   public:
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|     LLParser(StringRef F, SourceMgr &SM, SMDiagnostic &Err, Module *m)
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|         : Context(m->getContext()), Lex(F, SM, Err, m->getContext()), M(m),
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|           BlockAddressPFS(nullptr) {}
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|     bool Run();
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| 
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|     LLVMContext &getContext() { return Context; }
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| 
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|   private:
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| 
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|     bool Error(LocTy L, const Twine &Msg) const {
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|       return Lex.Error(L, Msg);
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|     }
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|     bool TokError(const Twine &Msg) const {
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|       return Error(Lex.getLoc(), Msg);
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|     }
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| 
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|     /// GetGlobalVal - Get a value with the specified name or ID, creating a
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|     /// forward reference record if needed.  This can return null if the value
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|     /// exists but does not have the right type.
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|     GlobalValue *GetGlobalVal(const std::string &N, Type *Ty, LocTy Loc);
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|     GlobalValue *GetGlobalVal(unsigned ID, Type *Ty, LocTy Loc);
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| 
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|     /// Get a Comdat with the specified name, creating a forward reference
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|     /// record if needed.
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|     Comdat *getComdat(const std::string &N, LocTy Loc);
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| 
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|     // Helper Routines.
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|     bool ParseToken(lltok::Kind T, const char *ErrMsg);
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|     bool EatIfPresent(lltok::Kind T) {
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|       if (Lex.getKind() != T) return false;
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|       Lex.Lex();
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|       return true;
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|     }
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| 
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|     FastMathFlags EatFastMathFlagsIfPresent() {
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|       FastMathFlags FMF;
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|       while (true)
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|         switch (Lex.getKind()) {
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|         case lltok::kw_fast: FMF.setUnsafeAlgebra();   Lex.Lex(); continue;
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|         case lltok::kw_nnan: FMF.setNoNaNs();          Lex.Lex(); continue;
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|         case lltok::kw_ninf: FMF.setNoInfs();          Lex.Lex(); continue;
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|         case lltok::kw_nsz:  FMF.setNoSignedZeros();   Lex.Lex(); continue;
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|         case lltok::kw_arcp: FMF.setAllowReciprocal(); Lex.Lex(); continue;
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|         default: return FMF;
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|         }
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|       return FMF;
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|     }
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| 
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|     bool ParseOptionalToken(lltok::Kind T, bool &Present,
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|                             LocTy *Loc = nullptr) {
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|       if (Lex.getKind() != T) {
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|         Present = false;
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|       } else {
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|         if (Loc)
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|           *Loc = Lex.getLoc();
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|         Lex.Lex();
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|         Present = true;
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|       }
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|       return false;
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|     }
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|     bool ParseStringConstant(std::string &Result);
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|     bool ParseUInt32(unsigned &Val);
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|     bool ParseUInt32(unsigned &Val, LocTy &Loc) {
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|       Loc = Lex.getLoc();
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|       return ParseUInt32(Val);
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|     }
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|     bool ParseUInt64(uint64_t &Val);
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|     bool ParseUInt64(uint64_t &Val, LocTy &Loc) {
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|       Loc = Lex.getLoc();
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|       return ParseUInt64(Val);
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|     }
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| 
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|     bool ParseTLSModel(GlobalVariable::ThreadLocalMode &TLM);
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|     bool ParseOptionalThreadLocal(GlobalVariable::ThreadLocalMode &TLM);
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|     bool parseOptionalUnnamedAddr(bool &UnnamedAddr) {
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|       return ParseOptionalToken(lltok::kw_unnamed_addr, UnnamedAddr);
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|     }
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|     bool ParseOptionalAddrSpace(unsigned &AddrSpace);
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|     bool ParseOptionalParamAttrs(AttrBuilder &B);
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|     bool ParseOptionalReturnAttrs(AttrBuilder &B);
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|     bool ParseOptionalLinkage(unsigned &Linkage, bool &HasLinkage);
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|     bool ParseOptionalLinkage(unsigned &Linkage) {
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|       bool HasLinkage; return ParseOptionalLinkage(Linkage, HasLinkage);
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|     }
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|     bool ParseOptionalVisibility(unsigned &Visibility);
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|     bool ParseOptionalDLLStorageClass(unsigned &DLLStorageClass);
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|     bool ParseOptionalCallingConv(unsigned &CC);
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|     bool ParseOptionalAlignment(unsigned &Alignment);
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|     bool ParseOptionalDereferenceableBytes(uint64_t &Bytes);
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|     bool ParseScopeAndOrdering(bool isAtomic, SynchronizationScope &Scope,
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|                                AtomicOrdering &Ordering);
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|     bool ParseOrdering(AtomicOrdering &Ordering);
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|     bool ParseOptionalStackAlignment(unsigned &Alignment);
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|     bool ParseOptionalCommaAlign(unsigned &Alignment, bool &AteExtraComma);
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|     bool ParseOptionalCommaInAlloca(bool &IsInAlloca);
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|     bool ParseIndexList(SmallVectorImpl<unsigned> &Indices,bool &AteExtraComma);
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|     bool ParseIndexList(SmallVectorImpl<unsigned> &Indices) {
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|       bool AteExtraComma;
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|       if (ParseIndexList(Indices, AteExtraComma)) return true;
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|       if (AteExtraComma)
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|         return TokError("expected index");
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|       return false;
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|     }
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| 
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|     // Top-Level Entities
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|     bool ParseTopLevelEntities();
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|     bool ValidateEndOfModule();
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|     bool ParseTargetDefinition();
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|     bool ParseModuleAsm();
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|     bool ParseDepLibs();        // FIXME: Remove in 4.0.
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|     bool ParseUnnamedType();
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|     bool ParseNamedType();
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|     bool ParseDeclare();
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|     bool ParseDefine();
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| 
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|     bool ParseGlobalType(bool &IsConstant);
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|     bool ParseUnnamedGlobal();
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|     bool ParseNamedGlobal();
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|     bool ParseGlobal(const std::string &Name, LocTy Loc, unsigned Linkage,
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|                      bool HasLinkage, unsigned Visibility,
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|                      unsigned DLLStorageClass,
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|                      GlobalVariable::ThreadLocalMode TLM, bool UnnamedAddr);
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|     bool ParseAlias(const std::string &Name, LocTy Loc, unsigned Linkage,
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|                     unsigned Visibility, unsigned DLLStorageClass,
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|                     GlobalVariable::ThreadLocalMode TLM, bool UnnamedAddr);
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|     bool parseComdat();
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|     bool ParseStandaloneMetadata();
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|     bool ParseNamedMetadata();
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|     bool ParseMDString(MDString *&Result);
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|     bool ParseMDNodeID(MDNode *&Result);
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|     bool ParseUnnamedAttrGrp();
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|     bool ParseFnAttributeValuePairs(AttrBuilder &B,
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|                                     std::vector<unsigned> &FwdRefAttrGrps,
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|                                     bool inAttrGrp, LocTy &BuiltinLoc);
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| 
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|     // Type Parsing.
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|     bool ParseType(Type *&Result, const Twine &Msg, bool AllowVoid = false);
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|     bool ParseType(Type *&Result, bool AllowVoid = false) {
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|       return ParseType(Result, "expected type", AllowVoid);
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|     }
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|     bool ParseType(Type *&Result, const Twine &Msg, LocTy &Loc,
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|                    bool AllowVoid = false) {
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|       Loc = Lex.getLoc();
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|       return ParseType(Result, Msg, AllowVoid);
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|     }
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|     bool ParseType(Type *&Result, LocTy &Loc, bool AllowVoid = false) {
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|       Loc = Lex.getLoc();
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|       return ParseType(Result, AllowVoid);
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|     }
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|     bool ParseAnonStructType(Type *&Result, bool Packed);
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|     bool ParseStructBody(SmallVectorImpl<Type*> &Body);
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|     bool ParseStructDefinition(SMLoc TypeLoc, StringRef Name,
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|                                std::pair<Type*, LocTy> &Entry,
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|                                Type *&ResultTy);
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| 
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|     bool ParseArrayVectorType(Type *&Result, bool isVector);
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|     bool ParseFunctionType(Type *&Result);
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| 
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|     // Function Semantic Analysis.
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|     class PerFunctionState {
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|       LLParser &P;
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|       Function &F;
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|       std::map<std::string, std::pair<Value*, LocTy> > ForwardRefVals;
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|       std::map<unsigned, std::pair<Value*, LocTy> > ForwardRefValIDs;
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|       std::vector<Value*> NumberedVals;
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| 
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|       /// FunctionNumber - If this is an unnamed function, this is the slot
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|       /// number of it, otherwise it is -1.
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|       int FunctionNumber;
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|     public:
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|       PerFunctionState(LLParser &p, Function &f, int FunctionNumber);
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|       ~PerFunctionState();
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| 
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|       Function &getFunction() const { return F; }
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| 
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|       bool FinishFunction();
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| 
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|       /// GetVal - Get a value with the specified name or ID, creating a
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|       /// forward reference record if needed.  This can return null if the value
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|       /// exists but does not have the right type.
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|       Value *GetVal(const std::string &Name, Type *Ty, LocTy Loc);
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|       Value *GetVal(unsigned ID, Type *Ty, LocTy Loc);
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| 
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|       /// SetInstName - After an instruction is parsed and inserted into its
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|       /// basic block, this installs its name.
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|       bool SetInstName(int NameID, const std::string &NameStr, LocTy NameLoc,
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|                        Instruction *Inst);
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| 
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|       /// GetBB - Get a basic block with the specified name or ID, creating a
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|       /// forward reference record if needed.  This can return null if the value
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|       /// is not a BasicBlock.
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|       BasicBlock *GetBB(const std::string &Name, LocTy Loc);
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|       BasicBlock *GetBB(unsigned ID, LocTy Loc);
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| 
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|       /// DefineBB - Define the specified basic block, which is either named or
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|       /// unnamed.  If there is an error, this returns null otherwise it returns
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|       /// the block being defined.
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|       BasicBlock *DefineBB(const std::string &Name, LocTy Loc);
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| 
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|       bool resolveForwardRefBlockAddresses();
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|     };
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| 
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|     bool ConvertValIDToValue(Type *Ty, ValID &ID, Value *&V,
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|                              PerFunctionState *PFS);
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| 
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|     bool ParseValue(Type *Ty, Value *&V, PerFunctionState *PFS);
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|     bool ParseValue(Type *Ty, Value *&V, PerFunctionState &PFS) {
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|       return ParseValue(Ty, V, &PFS);
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|     }
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|     bool ParseValue(Type *Ty, Value *&V, LocTy &Loc,
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|                     PerFunctionState &PFS) {
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|       Loc = Lex.getLoc();
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|       return ParseValue(Ty, V, &PFS);
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|     }
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| 
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|     bool ParseTypeAndValue(Value *&V, PerFunctionState *PFS);
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|     bool ParseTypeAndValue(Value *&V, PerFunctionState &PFS) {
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|       return ParseTypeAndValue(V, &PFS);
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|     }
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|     bool ParseTypeAndValue(Value *&V, LocTy &Loc, PerFunctionState &PFS) {
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|       Loc = Lex.getLoc();
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|       return ParseTypeAndValue(V, PFS);
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|     }
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|     bool ParseTypeAndBasicBlock(BasicBlock *&BB, LocTy &Loc,
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|                                 PerFunctionState &PFS);
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|     bool ParseTypeAndBasicBlock(BasicBlock *&BB, PerFunctionState &PFS) {
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|       LocTy Loc;
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|       return ParseTypeAndBasicBlock(BB, Loc, PFS);
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|     }
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| 
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| 
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|     struct ParamInfo {
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|       LocTy Loc;
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|       Value *V;
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|       AttributeSet Attrs;
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|       ParamInfo(LocTy loc, Value *v, AttributeSet attrs)
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|         : Loc(loc), V(v), Attrs(attrs) {}
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|     };
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|     bool ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList,
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|                             PerFunctionState &PFS,
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|                             bool IsMustTailCall = false,
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|                             bool InVarArgsFunc = false);
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| 
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|     // Constant Parsing.
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|     bool ParseValID(ValID &ID, PerFunctionState *PFS = nullptr);
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|     bool ParseGlobalValue(Type *Ty, Constant *&V);
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|     bool ParseGlobalTypeAndValue(Constant *&V);
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|     bool ParseGlobalValueVector(SmallVectorImpl<Constant *> &Elts);
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|     bool parseOptionalComdat(StringRef GlobalName, Comdat *&C);
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|     bool ParseMetadataAsValue(Value *&V, PerFunctionState &PFS);
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|     bool ParseValueAsMetadata(Metadata *&MD, PerFunctionState *PFS);
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|     bool ParseMetadata(Metadata *&MD, PerFunctionState *PFS);
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|     bool ParseMDTuple(MDNode *&MD, bool IsDistinct = false);
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|     bool ParseMDNode(MDNode *&MD);
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|     bool ParseMDNodeTail(MDNode *&MD);
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|     bool ParseMDNodeVector(SmallVectorImpl<Metadata *> &MDs);
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|     bool ParseInstructionMetadata(Instruction *Inst, PerFunctionState *PFS);
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| 
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|     bool ParseMDField(LocTy Loc, StringRef Name,
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|                       MDUnsignedField<uint32_t> &Result);
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|     bool ParseMDField(LocTy Loc, StringRef Name, MDField &Result);
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|     template <class FieldTy> bool ParseMDField(StringRef Name, FieldTy &Result);
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|     template <class ParserTy>
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|     bool ParseMDFieldsImplBody(ParserTy parseField);
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|     template <class ParserTy>
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|     bool ParseMDFieldsImpl(ParserTy parseField, LocTy &ClosingLoc);
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|     bool ParseSpecializedMDNode(MDNode *&N, bool IsDistinct = false);
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|     bool ParseMDLocation(MDNode *&Result, bool IsDistinct);
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| 
 | |
|     // Function Parsing.
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|     struct ArgInfo {
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|       LocTy Loc;
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|       Type *Ty;
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|       AttributeSet Attrs;
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|       std::string Name;
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|       ArgInfo(LocTy L, Type *ty, AttributeSet Attr, const std::string &N)
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|         : Loc(L), Ty(ty), Attrs(Attr), Name(N) {}
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|     };
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|     bool ParseArgumentList(SmallVectorImpl<ArgInfo> &ArgList, bool &isVarArg);
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|     bool ParseFunctionHeader(Function *&Fn, bool isDefine);
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|     bool ParseFunctionBody(Function &Fn);
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|     bool ParseBasicBlock(PerFunctionState &PFS);
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| 
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|     enum TailCallType { TCT_None, TCT_Tail, TCT_MustTail };
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| 
 | |
|     // Instruction Parsing.  Each instruction parsing routine can return with a
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|     // normal result, an error result, or return having eaten an extra comma.
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|     enum InstResult { InstNormal = 0, InstError = 1, InstExtraComma = 2 };
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|     int ParseInstruction(Instruction *&Inst, BasicBlock *BB,
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|                          PerFunctionState &PFS);
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|     bool ParseCmpPredicate(unsigned &Pred, unsigned Opc);
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| 
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|     bool ParseRet(Instruction *&Inst, BasicBlock *BB, PerFunctionState &PFS);
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|     bool ParseBr(Instruction *&Inst, PerFunctionState &PFS);
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|     bool ParseSwitch(Instruction *&Inst, PerFunctionState &PFS);
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|     bool ParseIndirectBr(Instruction *&Inst, PerFunctionState &PFS);
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|     bool ParseInvoke(Instruction *&Inst, PerFunctionState &PFS);
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|     bool ParseResume(Instruction *&Inst, PerFunctionState &PFS);
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| 
 | |
|     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,
 | |
|                    CallInst::TailCallKind 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);
 | |
| 
 | |
|     // Use-list order directives.
 | |
|     bool ParseUseListOrder(PerFunctionState *PFS = nullptr);
 | |
|     bool ParseUseListOrderBB();
 | |
|     bool ParseUseListOrderIndexes(SmallVectorImpl<unsigned> &Indexes);
 | |
|     bool sortUseListOrder(Value *V, ArrayRef<unsigned> Indexes, SMLoc Loc);
 | |
|   };
 | |
| } // End llvm namespace
 | |
| 
 | |
| #endif
 |