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121 lines
3.7 KiB
C++
121 lines
3.7 KiB
C++
//===-- llvm/SymbolTable.h - Implement a type planned symtab ------*- C++ -*-=//
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//
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// This file implements a symbol table that has planed broken up by type.
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// Identical types may have overlapping symbol names as long as they are
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// distinct.
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//
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// Note that this implements a chained symbol table. If a name being 'lookup'd
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// isn't found in the current symbol table, then the parent symbol table is
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// searched.
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//
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// This chaining behavior does NOT affect iterators though: only the lookup
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// method
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SYMBOL_TABLE_H
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#define LLVM_SYMBOL_TABLE_H
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#include "llvm/Value.h"
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#include <map>
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#ifndef NDEBUG // Only for assertions
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#include "llvm/Type.h"
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#include "llvm/ConstPoolVals.h"
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#endif
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class Value;
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class Type;
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// TODO: Change this back to vector<map<const string, Value *> >
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// Make the vector be a data member, and base it on UniqueID's
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// That should be much more efficient!
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//
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class SymbolTable : public AbstractTypeUser,
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public map<const Type *, map<const string, Value *> > {
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public:
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typedef map<const string, Value *> VarMap;
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typedef map<const Type *, VarMap> super;
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private:
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SymbolTable *ParentSymTab;
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friend class SymTabValue;
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inline void setParentSymTab(SymbolTable *P) { ParentSymTab = P; }
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public:
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typedef VarMap::iterator type_iterator;
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typedef VarMap::const_iterator type_const_iterator;
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inline SymbolTable(SymbolTable *P = 0) { ParentSymTab = P; }
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~SymbolTable();
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SymbolTable *getParentSymTab() { return ParentSymTab; }
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// lookup - Returns null on failure...
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Value *lookup(const Type *Ty, const string &name);
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// find - returns end(Ty->getIDNumber()) on failure...
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type_iterator type_find(const Type *Ty, const string &name);
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type_iterator type_find(const Value *D);
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// insert - Add named definition to the symbol table...
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inline void insert(Value *N) {
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assert(N->hasName() && "Value must be named to go into symbol table!");
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insertEntry(N->getName(), N);
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}
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// insert - Insert a constant or type into the symbol table with the specified
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// name... There can be a many to one mapping between names and
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// (constant/type)s.
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//
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inline void insert(const string &Name, Value *V) {
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assert((isa<Type>(V) || isa<ConstPoolVal>(V)) &&
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"Can only insert types and constants here!");
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insertEntry(Name, V);
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}
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void remove(Value *N);
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Value *type_remove(const type_iterator &It);
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// getUniqueName - Given a base name, return a string that is either equal to
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// it (or derived from it) that does not already occur in the symbol table for
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// the specified type.
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//
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string getUniqueName(const Type *Ty, const string &BaseName);
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inline unsigned type_size(const Type *TypeID) const {
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return find(TypeID)->second.size();
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}
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// Note that type_begin / type_end only work if you know that an element of
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// TypeID is already in the symbol table!!!
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//
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inline type_iterator type_begin(const Type *TypeID) {
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return find(TypeID)->second.begin();
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}
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inline type_const_iterator type_begin(const Type *TypeID) const {
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return find(TypeID)->second.begin();
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}
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inline type_iterator type_end(const Type *TypeID) {
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return find(TypeID)->second.end();
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}
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inline type_const_iterator type_end(const Type *TypeID) const {
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return find(TypeID)->second.end();
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}
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void dump() const; // Debug method, print out symbol table
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private:
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// insertEntry - Insert a value into the symbol table with the specified
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// name...
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//
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void insertEntry(const string &Name, Value *V);
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// This function is called when one of the types in the type plane are refined
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virtual void refineAbstractType(const DerivedType *OldTy, const Type *NewTy);
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};
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#endif
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