[Bug rtl-optimization/38534] gcc 4.2.1 and above: No need to save called-saved registers in 'noreturn' function

[lukas.graetz--- via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38534

--- Comment #11 from Lukas Grätz <lukas.gra...@tu-darmstadt.de> ---
(In reply to H.J. Lu from comment #10)
> The C++ test issue is caused by missing callee-saved registers for
> exception supports in noreturn functions in libstdc++.  I fixed it by
> keeping callee-saved registers when exception is enabled.
> 
> Backtrace with %rbp is unrelated to this.  Gcc will skip %rpb without
> -fno-omit-frame-pointer.

Great! Then I guess there is no pitfall in your patch.