delete of final class not devirtualized

[d0k]

Bugzilla Link	21368
Version	trunk
OS	All
CC	@hfinkel,@hjyamauchi

Extended Description

struct A {
virtual ~A() {}
};

struct B final : public A {};

void foo(B *b) { delete b; }

===

For 'foo' we emit a dtor call through the vtable even though the 'B' is final.

[hjyamauchi]

https://reviews.llvm.org/rL364100 should fix this.

[hjyamauchi]

https://reviews.llvm.org/rL364100 was reverted and recommitted as https://reviews.llvm.org/rL365509.

[BertalanD]

This has been fixed between LLVM 9 and 10.

https://godbolt.org/z/Gsnsea8E6