Store inheritance paths after CastExprs instead of inside them.

This takes some trickery since CastExpr has subclasses (and indeed,
is abstract).

Also, smoosh the CastKind into the bitfield from Expr.

Drops two words of storage from Expr in the common case of expressions
which don't need inheritance paths.  Avoids a separate allocation and
another word of overhead in cases needing inheritance paths.  Also has
the advantage of not leaking memory, since destructors for AST nodes are
never run.

llvm-svn: 110507

1 files changed, 2 insertions, 1 deletions

diff --git a/clang/lib/CodeGen/CodeGenModule.h b/clang/lib/CodeGen/CodeGenModule.h
index a4d8368d4d9..c7578788a57 100644
--- a/clang/lib/CodeGen/CodeGenModule.h
+++ b/clang/lib/CodeGen/CodeGenModule.h
@@ -315,7 +315,8 @@ public:
   /// a class. Returns null if the offset is 0. 
   llvm::Constant *
   GetNonVirtualBaseClassOffset(const CXXRecordDecl *ClassDecl,
-                               const CXXBaseSpecifierArray &BasePath);
+                               CastExpr::path_const_iterator PathBegin,
+                               CastExpr::path_const_iterator PathEnd);
   
   /// GetStringForStringLiteral - Return the appropriate bytes for a string
   /// literal, properly padded to match the literal type. If only the address of