https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66697
--- Comment #21 from Justas L <bucaneer at gmail dot com> --- (In reply to H.J. Lu from comment #20) > -mstackrealign works correctly as designed on x86-64. The > issue is MIN_STACK_BOUNDARY. When MIN_STACK_BOUNDARY is 128, > you don't need to realign the stack if you only need 128-bit > stack alignment. When is MIN_STACK_BOUNDARY equal to 128? I thought it defaulted to 64 (8*8) for x86_64 and 32 (4*8) for x86, no?