Generate Attr subclasses with TableGen.

Now all classes derived from Attr are generated from TableGen.
Additionally, Attr* is no longer its own linked list; SmallVectors or
Attr* are used. The accompanying LLVM commit contains the updates to
TableGen necessary for this.

Some other notes about newly-generated attribute classes:

 - The constructor arguments are a SourceLocation and a Context&,
   followed by the attributes arguments in the order that they were
   defined in Attr.td

 - Every argument in Attr.td has an appropriate accessor named getFoo,
   and there are sometimes a few extra ones (such as to get the length
   of a variadic argument).

Additionally, specific_attr_iterator has been introduced, which will
iterate over an AttrVec, but only over attributes of a certain type. It
can be accessed through either Decl::specific_attr_begin/end or
the global functions of the same name.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@111455 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 16 deletions

diff --git a/lib/AST/DeclBase.cpp b/lib/AST/DeclBase.cpp
index e4ff679c04..74cc1c29b9 100644
--- a/lib/AST/DeclBase.cpp
+++ b/lib/AST/DeclBase.cpp
@@ -312,35 +312,25 @@ unsigned Decl::getIdentifierNamespaceForKind(Kind DeclKind) {
   return 0;
 }
 
-void Decl::initAttrs(Attr *attrs) {
+void Decl::setAttrs(const AttrVec &attrs) {
   assert(!HasAttrs && "Decl already contains attrs.");
 
-  Attr *&AttrBlank = getASTContext().getDeclAttrs(this);
-  assert(AttrBlank == 0 && "HasAttrs was wrong?");
+  AttrVec &AttrBlank = getASTContext().getDeclAttrs(this);
+  assert(AttrBlank.empty() && "HasAttrs was wrong?");
 
   AttrBlank = attrs;
   HasAttrs = true;
 }
 
-void Decl::addAttr(Attr *NewAttr) {
-  Attr *&ExistingAttr = getASTContext().getDeclAttrs(this);
-
-  assert(NewAttr->getNext() == 0 && "Chain of attributes will be truncated!");
-  NewAttr->setNext(ExistingAttr);
-  ExistingAttr = NewAttr;
-
-  HasAttrs = true;
-}
-
-void Decl::invalidateAttrs() {
+void Decl::dropAttrs() {
   if (!HasAttrs) return;
 
   HasAttrs = false;
   getASTContext().eraseDeclAttrs(this);
 }
 
-const Attr *Decl::getAttrsImpl() const {
-  assert(HasAttrs && "getAttrs() should verify this!");
+const AttrVec &Decl::getAttrs() const {
+  assert(HasAttrs && "No attrs to get!");
   return getASTContext().getDeclAttrs(this);
 }