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1 //===- lib/MC/MCModule.cpp - MCModule implementation --------------------------===//
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 #include "llvm/MC/MCAtom.h"
11 #include "llvm/MC/MCModule.h"
12 
13 using namespace llvm;
14 
createAtom(MCAtom::AtomType Type,uint64_t Begin,uint64_t End)15 MCAtom *MCModule::createAtom(MCAtom::AtomType Type,
16                              uint64_t Begin, uint64_t End) {
17   assert(Begin < End && "Creating MCAtom with endpoints reversed?");
18 
19   // Check for atoms already covering this range.
20   IntervalMap<uint64_t, MCAtom*>::iterator I = OffsetMap.find(Begin);
21   assert((!I.valid() || I.start() < End) && "Offset range already occupied!");
22 
23   // Create the new atom and add it to our maps.
24   MCAtom *NewAtom = new MCAtom(Type, this, Begin, End);
25   AtomAllocationTracker.insert(NewAtom);
26   OffsetMap.insert(Begin, End, NewAtom);
27   return NewAtom;
28 }
29 
30 // remap - Update the interval mapping for an atom.
remap(MCAtom * Atom,uint64_t NewBegin,uint64_t NewEnd)31 void MCModule::remap(MCAtom *Atom, uint64_t NewBegin, uint64_t NewEnd) {
32   // Find and erase the old mapping.
33   IntervalMap<uint64_t, MCAtom*>::iterator I = OffsetMap.find(Atom->Begin);
34   assert(I.valid() && "Atom offset not found in module!");
35   assert(*I == Atom && "Previous atom mapping was invalid!");
36   I.erase();
37 
38   // Insert the new mapping.
39   OffsetMap.insert(NewBegin, NewEnd, Atom);
40 
41   // Update the atom internal bounds.
42   Atom->Begin = NewBegin;
43   Atom->End = NewEnd;
44 }
45 
46