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//===-- llvm/GVMaterializer.h - Interface for GV materializers --*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file 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 LLVM_GVMATERIALIZER_H
#define LLVM_GVMATERIALIZER_H
#include <string>
namespace llvm {
class Function;
class GlobalValue;
class Module;
class GVMaterializer {
protected:
GVMaterializer() {}
public:
virtual ~GVMaterializer();
/// isMaterializable - True if GV can be materialized from whatever backing
/// store this GVMaterializer uses and has not been materialized yet.
virtual bool isMaterializable(const GlobalValue *GV) const = 0;
/// isDematerializable - True if GV has been materialized and can be
/// dematerialized back to whatever backing store this GVMaterializer uses.
virtual bool isDematerializable(const GlobalValue *GV) const = 0;
/// Materialize - make sure the given GlobalValue is fully read. If the
/// module is corrupt, this returns true and fills in the optional string with
/// information about the problem. If successful, this returns false.
///
virtual bool Materialize(GlobalValue *GV, std::string *ErrInfo = 0) = 0;
/// Dematerialize - If the given GlobalValue is read in, and if the
/// GVMaterializer supports it, release the memory for the GV, and set it up
/// to be materialized lazily. If the Materializer doesn't support this
/// capability, this method is a noop.
///
virtual void Dematerialize(GlobalValue *) {}
/// MaterializeModule - make sure the entire Module has been completely read.
/// On error, this returns true and fills in the optional string with
/// information about the problem. If successful, this returns false.
///
virtual bool MaterializeModule(Module *M, std::string *ErrInfo = 0) = 0;
};
} // End llvm namespace
#endif
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