https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69454
--- Comment #29 from H.J. Lu <hjl.tools at gmail dot com> --- (In reply to Jakub Jelinek from comment #28) > > Which will likely penalize even code where the stv pass wouldn't do anything. In normal case it is a nop since the incoming stack is 128-bit aligned. > Isn't it better to just disable the stv pass if the stack isn't aligned > enough > (like in the #c4 or #c5 patches)? Ilya, please run your tests with -mpreferred-stack-boundary=2 to see which approach is preferred.