[Bug target/88656] [7/8/9 Regression] lr clobbered by thumb prologue before __builtin_return_address(0) reads from it

[rearnsha at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88656

--- Comment #7 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
This was fixed on trunk at some point, but not yet been backported.