[codeview] Translate basic DITypes to CV type records

Summary:
This is meant to be the tiniest step towards DIType to CV type index
translation that I could come up with. Whenever translation fails, we use type
index zero, which is the unknown type.

Reviewers: aaboud, zturner

Subscribers: llvm-commits, amccarth

Differential Revision: http://reviews.llvm.org/D20840

llvm-svn: 271408

1 files changed, 10 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.h b/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.h
index df7c85c0007..41350d42f7e 100644
--- a/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.h
+++ b/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.h
@@ -185,6 +185,16 @@ class LLVM_LIBRARY_VISIBILITY CodeViewDebug : public DebugHandlerBase {
 
   void emitLocalVariable(const LocalVariable &Var);
 
+  /// Translates the DIType to codeview if necessary and returns a type index
+  /// for it.
+  codeview::TypeIndex getTypeIndex(DITypeRef Ty);
+
+  codeview::TypeIndex lowerType(const DIType *Ty);
+  codeview::TypeIndex lowerTypeBasic(const DIBasicType *Ty);
+  codeview::TypeIndex lowerTypePointer(const DIDerivedType *Ty);
+  codeview::TypeIndex lowerTypeMemberPointer(const DIDerivedType *Ty);
+  codeview::TypeIndex lowerTypeModifier(const DIDerivedType *Ty);
+
 public:
   CodeViewDebug(AsmPrinter *Asm);