--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/DebugInfo/DWARF/DWARFDebugRangeList.cpp	Wed Feb 18 14:55:36 2015 +0900
@@ -0,0 +1,69 @@
+//===-- DWARFDebugRangesList.cpp ------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/DWARF/DWARFDebugRangeList.h"
+#include "llvm/Support/Format.h"
+#include "llvm/Support/raw_ostream.h"
+
+using namespace llvm;
+
+void DWARFDebugRangeList::clear() {
+  Offset = -1U;
+  AddressSize = 0;
+  Entries.clear();
+}
+
+bool DWARFDebugRangeList::extract(DataExtractor data, uint32_t *offset_ptr) {
+  clear();
+  if (!data.isValidOffset(*offset_ptr))
+    return false;
+  AddressSize = data.getAddressSize();
+  if (AddressSize != 4 && AddressSize != 8)
+    return false;
+  Offset = *offset_ptr;
+  while (true) {
+    RangeListEntry entry;
+    uint32_t prev_offset = *offset_ptr;
+    entry.StartAddress = data.getAddress(offset_ptr);
+    entry.EndAddress = data.getAddress(offset_ptr);
+    // Check that both values were extracted correctly.
+    if (*offset_ptr != prev_offset + 2 * AddressSize) {
+      clear();
+      return false;
+    }
+    if (entry.isEndOfListEntry())
+      break;
+    Entries.push_back(entry);
+  }
+  return true;
+}
+
+void DWARFDebugRangeList::dump(raw_ostream &OS) const {
+  for (const RangeListEntry &RLE : Entries) {
+    const char *format_str = (AddressSize == 4
+                              ? "%08x %08"  PRIx64 " %08"  PRIx64 "\n"
+                              : "%08x %016" PRIx64 " %016" PRIx64 "\n");
+    OS << format(format_str, Offset, RLE.StartAddress, RLE.EndAddress);
+  }
+  OS << format("%08x <End of list>\n", Offset);
+}
+
+DWARFAddressRangesVector
+DWARFDebugRangeList::getAbsoluteRanges(uint64_t BaseAddress) const {
+  DWARFAddressRangesVector Res;
+  for (const RangeListEntry &RLE : Entries) {
+    if (RLE.isBaseAddressSelectionEntry(AddressSize)) {
+      BaseAddress = RLE.EndAddress;
+    } else {
+      Res.push_back(std::make_pair(BaseAddress + RLE.StartAddress,
+                                   BaseAddress + RLE.EndAddress));
+    }
+  }
+  return Res;
+}