1 //===-- llvm/GVMaterializer.h - Interface for GV materializers --*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file provides an abstract interface for loading a module from some
11 // place. This interface allows incremental or random access loading of
12 // functions from the file. This is useful for applications like JIT compilers
13 // or interprocedural optimizers that do not need the entire program in memory
16 //===----------------------------------------------------------------------===//
18 #ifndef LLVM_GVMATERIALIZER_H
19 #define LLVM_GVMATERIALIZER_H
21 #include "llvm/Support/system_error.h"
29 class GVMaterializer {
34 virtual ~GVMaterializer();
36 /// isMaterializable - True if GV can be materialized from whatever backing
37 /// store this GVMaterializer uses and has not been materialized yet.
38 virtual bool isMaterializable(const GlobalValue *GV) const = 0;
40 /// isDematerializable - True if GV has been materialized and can be
41 /// dematerialized back to whatever backing store this GVMaterializer uses.
42 virtual bool isDematerializable(const GlobalValue *GV) const = 0;
44 /// Materialize - make sure the given GlobalValue is fully read.
46 virtual error_code Materialize(GlobalValue *GV) = 0;
48 /// Dematerialize - If the given GlobalValue is read in, and if the
49 /// GVMaterializer supports it, release the memory for the GV, and set it up
50 /// to be materialized lazily. If the Materializer doesn't support this
51 /// capability, this method is a noop.
53 virtual void Dematerialize(GlobalValue *) {}
55 /// MaterializeModule - make sure the entire Module has been completely read.
57 virtual error_code MaterializeModule(Module *M) = 0;
60 } // End llvm namespace