[readobj] Expand CodeView dumping functionality

This rewrites and expands the existing codeview dumping functionality in
llvm-readobj using techniques similar to those in lib/Object. This defines a
number of new records and enums useful for reading memory mapped codeview
sections in COFF objects.

The dumper is intended as a testing tool for LLVM as it grows more codeview
output capabilities.

Reviewers: majnemer

Differential Revision: http://reviews.llvm.org/D16104

llvm-svn: 257658
diff --git a/llvm/tools/llvm-pdbdump/FunctionDumper.cpp b/llvm/tools/llvm-pdbdump/FunctionDumper.cpp
index 9584812..7f41817 100644
--- a/llvm/tools/llvm-pdbdump/FunctionDumper.cpp
+++ b/llvm/tools/llvm-pdbdump/FunctionDumper.cpp
@@ -27,6 +27,7 @@
 #include "llvm/Support/Format.h"
 
 using namespace llvm;
+using namespace llvm::codeview;
 
 namespace {
 template <class T>
@@ -57,10 +58,10 @@
       Symbol.getSession().getConcreteSymbolById<PDBSymbolTypeUDT>(
           ClassParentId);
 
-  PDB_CallingConv CC = Symbol.getCallingConvention();
+  CallingConvention CC = Symbol.getCallingConvention();
   bool ShouldDumpCallingConvention = true;
-  if ((ClassParent && CC == PDB_CallingConv::Thiscall) ||
-      (!ClassParent && CC == PDB_CallingConv::NearStdcall)) {
+  if ((ClassParent && CC == CallingConvention::ThisCall) ||
+      (!ClassParent && CC == CallingConvention::NearStdCall)) {
     ShouldDumpCallingConvention = false;
   }
 
@@ -152,12 +153,12 @@
   Printer << " ";
 
   auto ClassParent = Symbol.getClassParent();
-  PDB_CallingConv CC = Signature->getCallingConvention();
+  CallingConvention CC = Signature->getCallingConvention();
   if (Pointer != FunctionDumper::PointerType::None)
     Printer << "(";
 
-  if ((ClassParent && CC != PDB_CallingConv::Thiscall) ||
-      (!ClassParent && CC != PDB_CallingConv::NearStdcall)) {
+  if ((ClassParent && CC != CallingConvention::ThisCall) ||
+      (!ClassParent && CC != CallingConvention::NearStdCall)) {
     WithColor(Printer, PDB_ColorItem::Keyword).get()
         << Signature->getCallingConvention() << " ";
   }