Add comment to CFGBlock suggested by Jiri Slaby.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130387 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 0 deletions

diff --git a/include/clang/Analysis/CFG.h b/include/clang/Analysis/CFG.h
index 53ed705b95..ca46459afd 100644
--- a/include/clang/Analysis/CFG.h
+++ b/include/clang/Analysis/CFG.h
@@ -264,6 +264,8 @@ public:
 ///     ? operator      LHS expression;  RHS expression
 ///     &&, ||          expression that uses result of && or ||, RHS
 ///
+/// But note that any of that may be NULL in case of optimized-out edges.
+///
 class CFGBlock {
   class ElementList {
     typedef BumpVector<CFGElement> ImplTy;