https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85230
--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Created attachment 43919 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43919&action=edit gcc8-pr85230.patch So, if you want to add STACK_DYNAMIC_OFFSET to new_sp for the second argument, then we could do either what this patch does (i.e. pass new_sp + (virtual_stack_dynamic_rtx - stack_pointer_rtx) as second argument) and rely on cse/forwprop/combine to optimize it into new_sp (if STACK_DYNAMIC_OFFSET is 0) or to just addition of some constant, or introduce a new virtual pseudo register that vregs pass would map directly to dynamic_offset.
