https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89152
--- Comment #2 from Marc Nieper-Wißkirchen <m...@nieper-wisskirchen.de> --- Even if Cont weren't passed in a register, the optimization of the unwrapped, first version would be missed in the structure-wrapped, second version. A general solution where such simple wrappers do not harm the performance of the generated code would be great. For example, it would be nice if there would be no difference to the optimizer whether I pass two values to a procedure or one value as a structure pair. Would a general structure unwrapping pass do it?
