[clang] [clang][Sema] Add noinline check for __builtin_frame_address and __builtin_return_address (PR #82966)

[Timothy Herchen via cfe-commits]

anematode wrote:

It's used 100+ more times through the macro `_RET_IP_`. https://elixir.bootlin.com/linux/latest/source/include/linux/instruction_pointer.h#L7

https://elixir.bootlin.com/linux/latest/source/include/linux/kasan.h#L164 has some example uses where `always_inline` is important for correctness.

https://elixir.bootlin.com/linux/latest/source/kernel/kcsan/core.c#L912 might be interesting? (This is way out of my depth.) Function isn't marked noinline and the return pointer is actually important. Also, many other functions in that file seem to be marked noinline, e.g. https://elixir.bootlin.com/linux/latest/source/kernel/kcsan/core.c#L1327, but not that one.

https://github.com/llvm/llvm-project/pull/82966