From: Aaron Ballman <aaron@aaronballman.com>
Date: Wed, 18 Dec 2013 15:59:41 +0000 (+0000)
Subject: Adding some comments about AST node requirements for attributes which create AST... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=d8741e24a01f60e14681438def15b52ba51ab228;p=clang

Adding some comments about AST node requirements for attributes which create AST nodes but never actually make use of them. No functional changes.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@197582 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/clang/Basic/Attr.td b/include/clang/Basic/Attr.td
index 1dc44d812c..38cf10bee3 100644
--- a/include/clang/Basic/Attr.td
+++ b/include/clang/Basic/Attr.td
@@ -502,12 +502,17 @@ def GNUInline : InheritableAttr {
 def Hot : InheritableAttr {
   let Spellings = [GNU<"hot">, CXX11<"gnu", "hot">];
   let Subjects = SubjectList<[Function]>;
+  // An AST node is created for this attribute, but not actually used beyond
+  // semantic checking for mutual exclusion with the Cold attribute.
 }
 
 def IBAction : InheritableAttr {
   let Spellings = [GNU<"ibaction">];
   let Subjects = SubjectList<[ObjCInstanceMethod], WarnDiag,
                              "ExpectedObjCInstanceMethod">;
+  // An AST node is created for this attribute, but is not used by other parts
+  // of the compiler. However, this node needs to exist in the AST because
+  // external tools rely on it.
 }
 
 def IBOutlet : InheritableAttr {