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1 //===-- llvm/MC/MCModule.h - MCModule class ---------------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file contains the declaration of the MCModule class, which is used to
11 // represent a complete, disassembled object file or executable.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef LLVM_MC_MCMODULE_H
16 #define LLVM_MC_MCMODULE_H
17 
18 #include "llvm/ADT/DenseMap.h"
19 #include "llvm/ADT/IntervalMap.h"
20 #include "llvm/ADT/SmallPtrSet.h"
21 #include "llvm/Support/DataTypes.h"
22 
23 namespace llvm {
24 
25 class MCAtom;
26 
27 /// MCModule - This class represent a completely disassembled object file or
28 /// executable.  It comprises a list of MCAtom's, and a branch target table.
29 /// Each atom represents a contiguous range of either instructions or data.
30 class MCModule {
31   /// AtomAllocationTracker - An MCModule owns its component MCAtom's, so it
32   /// must track them in order to ensure they are properly freed as atoms are
33   /// merged or otherwise manipulated.
34   SmallPtrSet<MCAtom*, 8> AtomAllocationTracker;
35 
36   /// OffsetMap - Efficiently maps offset ranges to MCAtom's.
37   IntervalMap<uint64_t, MCAtom*> OffsetMap;
38 
39   /// BranchTargetMap - Maps offsets that are determined to be branches and
40   /// can be statically resolved to their target offsets.
41   DenseMap<uint64_t, MCAtom*> BranchTargetMap;
42 
43   friend class MCAtom;
44 
45   /// remap - Update the interval mapping for an MCAtom.
46   void remap(MCAtom *Atom, uint64_t NewBegin, uint64_t NewEnd);
47 
48 public:
MCModule(IntervalMap<uint64_t,MCAtom * >::Allocator & A)49   MCModule(IntervalMap<uint64_t, MCAtom*>::Allocator &A) : OffsetMap(A) { }
50 
51   /// createAtom - Creates a new MCAtom covering the specified offset range.
52   MCAtom *createAtom(MCAtom::AtomType Type, uint64_t Begin, uint64_t End);
53 };
54 
55 }
56 
57 #endif
58 
59