rjmccall added inline comments.

================
Comment at: include/clang/AST/ASTContext.h:161
+    Expr *getCopyExpr() const;
+    bool canThrow() const;
+    llvm::PointerIntPair<Expr *, 1, bool> ExprAndFlag;
----------------
These should all just be defined inline.


================
Comment at: lib/CodeGen/CGBlocks.cpp:1725
                                BlockFieldFlags Flags, bool EHOnly,
+                               bool DisposeCannotThrow, VarDecl *Var,
                                CodeGenFunction &CGF) {
----------------
Could you replace these two flags with something more semantic, like telling 
this function what the context of pushing the cleanup is — basically meaning, 
are we in the copy helper or the destroy helper?  That will let you pull the 
comment explaining `DisposeCannotThrow` into this function, where it makes a 
lot more sense.


Repository:
  rC Clang

https://reviews.llvm.org/D50152



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