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//===-- llvm/ModuleProvider.h - Interface for module providers --*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file provides an abstract interface for loading a module from some
// place. This interface allows incremental or random access loading of
// functions from the file. This is useful for applications like JIT compilers
// or interprocedural optimizers that do not need the entire program in memory
// at the same time.
//
//===----------------------------------------------------------------------===//
#ifndef MODULEPROVIDER_H
#define MODULEPROVIDER_H
namespace llvm {
class Function;
class Module;
class ModuleProvider {
protected:
Module *TheModule;
ModuleProvider();
public:
virtual ~ModuleProvider();
/// getModule - returns the module this provider is encapsulating.
///
Module* getModule() { return TheModule; }
/// materializeFunction - make sure the given function is fully read. Note
/// that this can throw an exception if the module is corrupt!
///
virtual void materializeFunction(Function *F) = 0;
/// materializeModule - make sure the entire Module has been completely read.
/// Note that this can throw an exception if the module is corrupt!
///
virtual Module* materializeModule() = 0;
/// releaseModule - no longer delete the Module* when provider is destroyed.
/// Note that this can throw an exception if the module is corrupt!
///
virtual Module* releaseModule() {
// Since we're losing control of this Module, we must hand it back complete
materializeModule();
Module *tempM = TheModule;
TheModule = 0;
return tempM;
}
};
/// ExistingModuleProvider - Allow conversion from a fully materialized Module
/// into a ModuleProvider, allowing code that expects a ModuleProvider to work
/// if we just have a Module. Note that the ModuleProvider takes ownership of
/// the Module specified.
struct ExistingModuleProvider : public ModuleProvider {
ExistingModuleProvider(Module *M) {
TheModule = M;
}
void materializeFunction(Function *F) {}
Module* materializeModule() { return TheModule; }
};
} // End llvm namespace
#endif
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