https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85939
--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> --- (In reply to Uroš Bizjak from comment #5) > (In reply to Florian Weimer from comment #3) > > (In reply to Uroš Bizjak from comment #1) > > > Please also use -mincoming-stack-boundary=2 to tell the compiler about > > > possible incoming stack (mis)alignment. > > > > This does change the result; alignment is performed. This is not > > documented. I'm not sure what the intent is here. > > > > (In reply to Uroš Bizjak from comment #2) > > > FYI, -mstackrealign applies only to main (). > > > > I don't think this is true. In the example, stack alignment is performed if > > I use __m128 instead of __m64. > > Let's add HJ to CC, maybe he can shed some light on this option. I believe __m64 is 4-byte aligned.
