> >> >>> @@ -11950,6 +12088,72 @@ lower_bound_in_type (tree outer, tree inner) >>> } >>> } >>> >>> +/* Returns true when the given TYPE has padding inside it. >>> + return false otherwise. */ >>> +bool >>> +type_has_padding (tree type) >> >> Would it be possible to reuse __builtin_clear_padding here? > > Not sure, where can I get more details on __builtin_clear_padding? I can > study a little bit more on this to make sure this.
After some study, my understanding is, the call to __builtin_clear_padding is expanded during gimplification phase. And there is no __bultin_clear_padding expanding during rtx expanding phase. Is the above understanding correct? If so, for -ftrivial-auto-var-init, padding initialization should be done both in gimplification phase and rtx expanding phase. And since the __builtin_clear_padding might not be good for rtx expanding, reusing __builtin_clear_padding might not work. Let me know if I misunderstand something. Qing >>
