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119 lines
4.0 KiB
C++
119 lines
4.0 KiB
C++
//===-- llvm/SlotCalculator.h - Calculate value slots -----------*- 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 the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This class calculates the slots that values will land in. This is useful for
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// when writing bytecode or assembly out, because you have to know these things.
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//
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// Specifically, this class calculates the "type plane numbering" that you see
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// for a function if you strip out all of the symbols in it. For assembly
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// writing, this is used when a symbol does not have a name. For bytecode
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// writing, this is always used, and the symbol table is added on later.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SLOTCALCULATOR_H
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#define LLVM_SLOTCALCULATOR_H
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#include <vector>
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#include <map>
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namespace llvm {
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class Value;
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class Module;
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class Function;
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class SymbolTable;
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class ConstantArray;
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class SlotCalculator {
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const Module *TheModule;
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/// BuildBytecodeInfo - If true, this is the creating information for the
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/// bytecode writer, if false, we are building information for the assembly
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/// emitter. The assembly emitter doesn't need named objects numbered, among
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/// other differences.
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bool BuildBytecodeInfo;
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typedef std::vector<const Value*> TypePlane;
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std::vector<TypePlane> Table;
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std::map<const Value*, unsigned> NodeMap;
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/// ConstantStrings - If we are indexing for a bytecode file, this keeps track
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/// of all of the constants strings that need to be emitted.
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std::vector<const ConstantArray*> ConstantStrings;
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/// ModuleLevel - Used to keep track of which values belong to the module,
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/// and which values belong to the currently incorporated function.
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///
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std::vector<unsigned> ModuleLevel;
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public:
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SlotCalculator(const Module *M, bool BuildBytecodeInfo);
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// Start out in incorp state
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SlotCalculator(const Function *F, bool BuildBytecodeInfo);
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/// getSlot returns < 0 on error!
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///
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int getSlot(const Value *D) const;
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inline unsigned getNumPlanes() const { return Table.size(); }
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inline unsigned getModuleLevel(unsigned Plane) const {
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return Plane < ModuleLevel.size() ? ModuleLevel[Plane] : 0;
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}
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inline const TypePlane &getPlane(unsigned Plane) const {
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return Table[Plane];
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}
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/// incorporateFunction/purgeFunction - If you'd like to deal with a function,
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/// use these two methods to get its data into the SlotCalculator!
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///
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void incorporateFunction(const Function *F);
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void purgeFunction();
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/// string_iterator/string_begin/end - Access the list of module-level
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/// constant strings that have been incorporated. This is only applicable to
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/// bytecode files.
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typedef std::vector<const ConstantArray*>::const_iterator string_iterator;
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string_iterator string_begin() const { return ConstantStrings.begin(); }
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string_iterator string_end() const { return ConstantStrings.end(); }
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protected:
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// getOrCreateSlot - Values can be crammed into here at will... if
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// they haven't been inserted already, they get inserted, otherwise
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// they are ignored.
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//
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int getOrCreateSlot(const Value *D);
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// insertValue - Insert a value into the value table... Return the
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// slot that it occupies, or -1 if the declaration is to be ignored
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// because of the IgnoreNamedNodes flag.
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//
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int insertValue(const Value *D, bool dontIgnore = false);
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// doInsertValue - Small helper function to be called only be insertVal.
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int doInsertValue(const Value *D);
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// processModule - Process all of the module level function declarations and
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// types that are available.
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//
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void processModule();
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// processSymbolTable - Insert all of the values in the specified symbol table
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// into the values table...
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//
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void processSymbolTable(const SymbolTable *ST);
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void processSymbolTableConstants(const SymbolTable *ST);
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};
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} // End llvm namespace
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#endif
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