[Bug ipa/77333] Incorrect stack adjust in epilogue when targeting i686-w64-mingw32

[jamborm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77333

--- Comment #21 from Martin Jambor <jamborm at gcc dot gnu.org> ---
I have proposed two ways to fix this on the mailing list:

https://gcc.gnu.org/ml/gcc-patches/2017-03/msg00535.html

(I have not yet looked at how much back-portable they are but I do not
expect any issues.)