https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64974
--- Comment #2 from Oleg Endo <olegendo at gcc dot gnu.org> --- The problem got slightly worse with r220594. The dead store to the stack frame is not eliminated anymore. Before the memory operands' addresses were loaded into a reg using 'force_reg', which AFAIK dropped the memory aliasing info. Now that 'force_reg' is not used anymore, the dead stores remain. I don't quite understand how those things are related.
