[dwarfdump] Add -show-form

This enables printing of DWARF form types after the DWARF attribute
types.

Differential revision: https://reviews.llvm.org/D38459

llvm-svn: 314685
diff --git a/llvm/lib/DebugInfo/DWARF/DWARFDie.cpp b/llvm/lib/DebugInfo/DWARF/DWARFDie.cpp
index 31074a8..a237103 100644
--- a/llvm/lib/DebugInfo/DWARF/DWARFDie.cpp
+++ b/llvm/lib/DebugInfo/DWARF/DWARFDie.cpp
@@ -139,7 +139,7 @@
   else
     WithColor(OS, syntax::Attribute).get() << format("DW_AT_Unknown_%x", Attr);
 
-  if (DumpOpts.Verbose) {
+  if (DumpOpts.Verbose || DumpOpts.ShowForm) {
     auto formString = FormEncodingString(Form);
     if (!formString.empty())
       OS << " [" << formString << ']';