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67 lines
2.4 KiB
C++
67 lines
2.4 KiB
C++
//===-- llvm/GVMaterializer.h - Interface for GV materializers --*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides an abstract interface for loading a module from some
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// place. This interface allows incremental or random access loading of
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// functions from the file. This is useful for applications like JIT compilers
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// or interprocedural optimizers that do not need the entire program in memory
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// at the same time.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_GVMATERIALIZER_H
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#define LLVM_GVMATERIALIZER_H
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#include <string>
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namespace llvm {
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class Function;
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class GlobalValue;
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class Module;
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class GVMaterializer {
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protected:
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GVMaterializer() {}
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public:
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virtual ~GVMaterializer();
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/// isMaterializable - True if GV can be materialized from whatever backing
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/// store this GVMaterializer uses and has not been materialized yet.
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virtual bool isMaterializable(const GlobalValue *GV) const = 0;
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/// isDematerializable - True if GV has been materialized and can be
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/// dematerialized back to whatever backing store this GVMaterializer uses.
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virtual bool isDematerializable(const GlobalValue *GV) const = 0;
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/// Materialize - make sure the given GlobalValue is fully read. If the
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/// module is corrupt, this returns true and fills in the optional string with
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/// information about the problem. If successful, this returns false.
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///
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virtual bool Materialize(GlobalValue *GV, std::string *ErrInfo = 0) = 0;
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/// Dematerialize - If the given GlobalValue is read in, and if the
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/// GVMaterializer supports it, release the memory for the GV, and set it up
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/// to be materialized lazily. If the Materializer doesn't support this
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/// capability, this method is a noop.
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///
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virtual void Dematerialize(GlobalValue *) {}
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/// MaterializeModule - make sure the entire Module has been completely read.
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/// On error, this returns true and fills in the optional string with
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/// information about the problem. If successful, this returns false.
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///
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virtual bool MaterializeModule(Module *M, std::string *ErrInfo = 0) = 0;
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};
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} // End llvm namespace
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#endif
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