1 //===- 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_IR_GVMATERIALIZER_H
19 #define LLVM_IR_GVMATERIALIZER_H
21 #include "llvm/ADT/DenseMap.h"
22 #include <system_error>
32 class GVMaterializer {
37 virtual ~GVMaterializer();
39 /// True if GV has been materialized and can be dematerialized back to
40 /// whatever backing store this GVMaterializer uses.
41 virtual bool isDematerializable(const GlobalValue *GV) const = 0;
43 /// Make sure the given GlobalValue is fully read.
45 virtual std::error_code materialize(GlobalValue *GV) = 0;
47 /// If the given GlobalValue is read in, and if the GVMaterializer supports
48 /// it, release the memory for the GV, and set it up to be materialized
49 /// lazily. If the Materializer doesn't support this capability, this method
52 virtual void dematerialize(GlobalValue *) {}
54 /// Make sure the entire Module has been completely read.
56 virtual std::error_code materializeModule(Module *M) = 0;
58 virtual std::error_code materializeMetadata() = 0;
59 virtual void setStripDebugInfo() = 0;
61 /// Client should define this interface if the mapping between metadata
62 /// values and value ids needs to be preserved, e.g. across materializer
63 /// instantiations. If OnlyTempMD is true, only those that have remained
64 /// temporary metadata are recorded in the map.
66 saveMDValueList(DenseMap<const Metadata *, unsigned> &MDValueToValIDMap,
69 virtual std::vector<StructType *> getIdentifiedStructTypes() const = 0;
72 } // End llvm namespace