[Bug ipa/111613] [12/13/14 Regression] Bit field stores can be incorrectly optimized away when -fstore-merging is in effect

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111613

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
It's the late IPA modref that mis-analyzes the store-merged sequence I think.