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ef9b9a7939
This patch replaces the SymbolTable class with ValueSymbolTable which does not support types planes. This means that all symbol names in LLVM must now be unique. The patch addresses the necessary changes to deal with this and removes code no longer needed as a result. This completes the bulk of the changes for this PR. Some cleanup patches will follow. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33918 91177308-0d34-0410-b5e6-96231b3b80d8
145 lines
4.5 KiB
C++
145 lines
4.5 KiB
C++
//===-- llvm/ValueSymbolTable.h - Implement a Value Symtab ------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Reid Spencer based on the original SymbolTable.h
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// written by the LLVM research group and re-written by Reid Spencer.
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// It is distributed under the University of Illinois Open Source License.
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// See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the name/Value symbol table for LLVM.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_VALUE_SYMBOL_TABLE_H
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#define LLVM_VALUE_SYMBOL_TABLE_H
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#include "llvm/Value.h"
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#include <map>
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namespace llvm {
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/// This class provides a symbol table of name/value pairs. It is essentially
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/// a std::map<std::string,Value*> but has a controlled interface provided by
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/// LLVM as well as ensuring uniqueness of names.
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///
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class ValueSymbolTable {
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/// @name Types
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/// @{
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public:
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/// @brief A mapping of names to values.
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typedef std::map<const std::string, Value *> ValueMap;
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/// @brief An iterator over a ValueMap.
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typedef ValueMap::iterator iterator;
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/// @brief A const_iterator over a ValueMap.
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typedef ValueMap::const_iterator const_iterator;
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/// @}
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/// @name Constructors
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/// @{
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public:
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ValueSymbolTable() : LastUnique(0) {}
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~ValueSymbolTable();
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/// @}
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/// @name Accessors
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/// @{
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public:
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/// This method finds the value with the given \p name in the
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/// the symbol table.
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/// @returns the value associated with the \p name
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/// @brief Lookup a named Value.
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Value *lookup(const std::string &name) const;
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/// @returns true iff the symbol table is empty
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/// @brief Determine if the symbol table is empty
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inline bool empty() const { return vmap.empty(); }
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/// @brief The number of name/type pairs is returned.
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inline unsigned size() const { return unsigned(vmap.size()); }
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/// Given a base name, return a string that is either equal to it or
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/// derived from it that does not already occur in the symbol table
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/// for the specified type.
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/// @brief Get a name unique to this symbol table
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std::string getUniqueName(const std::string &BaseName) const;
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/// @return 1 if the name is in the symbol table, 0 otherwise
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/// @brief Determine if a name is in the symbol table
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ValueMap::size_type count(const std::string &name) const {
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return vmap.count(name);
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}
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/// This function can be used from the debugger to display the
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/// content of the symbol table while debugging.
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/// @brief Print out symbol table on stderr
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void dump() const;
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/// @}
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/// @name Iteration
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/// @{
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public:
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/// @brief Get an iterator that from the beginning of the symbol table.
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inline iterator begin() { return vmap.begin(); }
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/// @brief Get a const_iterator that from the beginning of the symbol table.
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inline const_iterator begin() const { return vmap.begin(); }
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/// @brief Get an iterator to the end of the symbol table.
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inline iterator end() { return vmap.end(); }
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/// @brief Get a const_iterator to the end of the symbol table.
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inline const_iterator end() const { return vmap.end(); }
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/// @}
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/// @name Mutators
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/// @{
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public:
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/// This method will strip the symbol table of its names.
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/// @brief Strip the symbol table.
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bool strip();
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/// This method adds the provided value \p N to the symbol table. The Value
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/// must have a name which is used to place the value in the symbol table.
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/// @brief Add a named value to the symbol table
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void insert(Value *Val);
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/// This method removes a value from the symbol table. The name of the
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/// Value is extracted from \p Val and used to lookup the Value in the
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/// symbol table. If the Value is not in the symbol table, this method
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/// returns false. \p Val is not deleted, just removed from the symbol table.
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/// @returns true if \p Val was successfully removed, false otherwise
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/// @brief Remove a value from the symbol table.
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bool remove(Value* Val);
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/// Given a value with a non-empty name, remove its existing
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/// entry from the symbol table and insert a new one for Name. This is
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/// equivalent to doing "remove(V), V->Name = Name, insert(V)".
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/// @brief Rename a value in the symbol table
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bool rename(Value *V, const std::string &Name);
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/// @}
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/// @name Internal Data
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/// @{
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private:
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ValueMap vmap; ///< The map that holds the symbol table.
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mutable uint32_t LastUnique; ///< Counter for tracking unique names
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/// @}
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};
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} // End llvm namespace
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#endif
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