pointer.  Its purpose in life is to be a glorified void*, but which does not
implicitly convert to void* or other OpaquePtr's with a different UID.

Introduce Action::DeclPtrTy which is a typedef for OpaquePtr<0>.  Change the 
entire parser/sema interface to use DeclPtrTy instead of DeclTy*.  This
makes the C++ compiler enforce that these aren't convertible to other opaque
types.

We should also convert ExprTy, StmtTy, TypeTy, AttrTy, BaseTy, etc,
but I don't plan to do that in the short term.

The one outstanding known problem with this patch is that we lose the 
bitmangling optimization where ActionResult<DeclPtrTy> doesn't know how to
bitmangle the success bit into the low bit of DeclPtrTy.  I will rectify
this with a subsequent patch.

llvm-svn: 67952

llvm-svn: 67951

llvm-svn: 67948

llvm-svn: 67947

llvm-svn: 67946

llvm-svn: 67944

llvm-svn: 67933

llvm-svn: 67932

llvm-svn: 67929

llvm-svn: 67928

llvm-svn: 67927

instead of in NextDeclarator.  This temporarily increases memory
usage, but simplifies and decouples things.

llvm-svn: 67926

llvm-svn: 67925

llvm-svn: 67924

llvm-svn: 67923

llvm-svn: 67922

llvm-svn: 67921

llvm-svn: 67920

points within contexts not scopes.

llvm-svn: 67919

llvm-svn: 67918

llvm-svn: 67916

llvm-svn: 67915

llvm-svn: 67914

 TranslationUnit

llvm-svn: 67913

SemaCXX//overload-member-call.cpp
SemaCXX//overloaded-operator.cpp
SemaTemplate//instantiate-method.cpp

llvm-svn: 67912

llvm-svn: 67911

llvm-svn: 67910

llvm-svn: 67909

llvm-svn: 67908

llvm-svn: 67907

just a wrapper around ASTContext.

llvm-svn: 67906

llvm-svn: 67905

llvm-svn: 67904

llvm-svn: 67903

llvm-svn: 67902

etc., so that the "body" is always considered a top-level statement for edge
transitions (even if it is an expression).

llvm-svn: 67901

llvm-svn: 67900

llvm-svn: 67899

types don't get generated when blocks aren't used.

llvm-svn: 67898

llvm-svn: 67897