diff --git a/lib/MC/MCModule.cpp b/lib/MC/MCModule.cpp
index f563160..50bac47 100644
--- a/lib/MC/MCModule.cpp
+++ b/lib/MC/MCModule.cpp
@@ -7,39 +7,92 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/MC/MCAtom.h"
 #include "llvm/MC/MCModule.h"
+#include "llvm/MC/MCAtom.h"
+#include "llvm/MC/MCFunction.h"
+#include <algorithm>
 
 using namespace llvm;
 
-MCAtom *MCModule::createAtom(MCAtom::AtomType Type,
-                             uint64_t Begin, uint64_t End) {
+static bool AtomComp(const MCAtom *L, uint64_t Addr) {
+  return L->getEndAddr() < Addr;
+}
+
+void MCModule::map(MCAtom *NewAtom) {
+  uint64_t Begin = NewAtom->Begin,
+           End = NewAtom->End;
+
   assert(Begin < End && "Creating MCAtom with endpoints reversed?");
 
   // Check for atoms already covering this range.
-  IntervalMap<uint64_t, MCAtom*>::iterator I = OffsetMap.find(Begin);
-  assert((!I.valid() || I.start() < End) && "Offset range already occupied!");
+  AtomListTy::iterator I = std::lower_bound(atom_begin(), atom_end(),
+                                            Begin, AtomComp);
+  assert((I == atom_end() || (*I)->getBeginAddr() > End)
+         && "Offset range already occupied!");
 
-  // Create the new atom and add it to our maps.
-  MCAtom *NewAtom = new MCAtom(Type, this, Begin, End);
-  AtomAllocationTracker.insert(NewAtom);
-  OffsetMap.insert(Begin, End, NewAtom);
+  // Insert the new atom to the list.
+  Atoms.insert(I, NewAtom);
+}
+
+MCTextAtom *MCModule::createTextAtom(uint64_t Begin, uint64_t End) {
+  MCTextAtom *NewAtom = new MCTextAtom(this, Begin, End);
+  map(NewAtom);
+  return NewAtom;
+}
+
+MCDataAtom *MCModule::createDataAtom(uint64_t Begin, uint64_t End) {
+  MCDataAtom *NewAtom = new MCDataAtom(this, Begin, End);
+  map(NewAtom);
   return NewAtom;
 }
 
 // remap - Update the interval mapping for an atom.
 void MCModule::remap(MCAtom *Atom, uint64_t NewBegin, uint64_t NewEnd) {
   // Find and erase the old mapping.
-  IntervalMap<uint64_t, MCAtom*>::iterator I = OffsetMap.find(Atom->Begin);
-  assert(I.valid() && "Atom offset not found in module!");
+  AtomListTy::iterator I = std::lower_bound(atom_begin(), atom_end(),
+                                            Atom->Begin, AtomComp);
+  assert(I != atom_end() && "Atom offset not found in module!");
   assert(*I == Atom && "Previous atom mapping was invalid!");
-  I.erase();
+  Atoms.erase(I);
 
   // Insert the new mapping.
-  OffsetMap.insert(NewBegin, NewEnd, Atom);
+  AtomListTy::iterator NewI = std::lower_bound(atom_begin(), atom_end(),
+                                               NewBegin, AtomComp);
+  Atoms.insert(NewI, Atom);
 
   // Update the atom internal bounds.
   Atom->Begin = NewBegin;
   Atom->End = NewEnd;
 }
 
+const MCAtom *MCModule::findAtomContaining(uint64_t Addr) const {
+  AtomListTy::const_iterator I = std::lower_bound(atom_begin(), atom_end(),
+                                                  Addr, AtomComp);
+  if (I != atom_end() && (*I)->getBeginAddr() <= Addr)
+    return *I;
+  return 0;
+}
+
+MCAtom *MCModule::findAtomContaining(uint64_t Addr) {
+  AtomListTy::iterator I = std::lower_bound(atom_begin(), atom_end(),
+                                            Addr, AtomComp);
+  if (I != atom_end() && (*I)->getBeginAddr() <= Addr)
+    return *I;
+  return 0;
+}
+
+MCFunction *MCModule::createFunction(const StringRef &Name) {
+  Functions.push_back(new MCFunction(Name));
+  return Functions.back();
+}
+
+MCModule::~MCModule() {
+  for (AtomListTy::iterator AI = atom_begin(),
+                            AE = atom_end();
+                            AI != AE; ++AI)
+    delete *AI;
+  for (FunctionListTy::iterator FI = func_begin(),
+                                FE = func_end();
+                                FI != FE; ++FI)
+    delete *FI;
+}