[Bug other/66394] [5/6 Regression] ICE in -flto -fmerge-all-constants -fno-use-linker-plugin targetting i686-w64-mingw32

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66394

--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r201408.