[DWARFv5] Emit new unit header format.

Requesting DWARF v5 will now get you the new compile-unit and
type-unit headers.  llvm-dwarfdump will also recognize them.

Differential Revision: http://reviews.llvm.org/D30206

llvm-svn: 296514
diff --git a/llvm/lib/DebugInfo/DWARF/DWARFCompileUnit.cpp b/llvm/lib/DebugInfo/DWARF/DWARFCompileUnit.cpp
index 948972f..6e550f2 100644
--- a/llvm/lib/DebugInfo/DWARF/DWARFCompileUnit.cpp
+++ b/llvm/lib/DebugInfo/DWARF/DWARFCompileUnit.cpp
@@ -18,8 +18,10 @@
 void DWARFCompileUnit::dump(raw_ostream &OS) {
   OS << format("0x%08x", getOffset()) << ": Compile Unit:"
      << " length = " << format("0x%08x", getLength())
-     << " version = " << format("0x%04x", getVersion())
-     << " abbr_offset = " << format("0x%04x", getAbbreviations()->getOffset())
+     << " version = " << format("0x%04x", getVersion());
+  if (getVersion() >= 5)
+    OS << " unit_type = " << dwarf::UnitTypeString(getUnitType());
+  OS << " abbr_offset = " << format("0x%04x", getAbbreviations()->getOffset())
      << " addr_size = " << format("0x%02x", getAddressByteSize())
      << " (next unit at " << format("0x%08x", getNextUnitOffset())
      << ")\n";