ahatanak added inline comments.
================
Comment at: lib/Sema/SemaDecl.cpp:5374
@@ +5373,3 @@
+
+ // Virtual functions cannot be marked as 'notail'.
+ if (auto *Attr = ND.getAttr<NotTailCalledAttr>())
----------------
aaron.ballman wrote:
> Is there a reason this is here instead of SemaDeclAttr.cpp? It seems like the
> decl passed in with the attribute attached to it should already be known to
> be virtual or not?
I initially did the check in SemaDeclAttr.cpp but found out that methods
declared override are not known to be virtual (isVirtual returns false) when
ProcessDeclAttributes is called:
class Base {
// This method is fine.
virtual int foo1();
};
class Derived1 : public Base {
// isVirtual() is false for the declaration of this method.
int foo1() override;
};
This is because ProcessDeclAttributes is called before CheckFunctionDeclaration
(in line 7952, which calls Sema::AddOverriddenMethods) is called in
Sema::ActOnFunctionDeclarator. Unless there is another way to check if a method
is virtual, I don't think we can move the check to SemaDeclAttr.cpp?
http://reviews.llvm.org/D12922
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