[Bug tree-optimization/105030] store motion if-change flag causes if-conversion optimization can't be taken.

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105030

--- Comment #13 from HaoChen Gui <guihaoc at gcc dot gnu.org> ---
Could we use the original alias set if the tree code of 'atemp' is var_decl? Is
it safe? In which situation we shall use alias-set zero? Thanks.