https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78444
--- Comment #8 from Iain Sandoe <iains at gcc dot gnu.org> --- (In reply to Uroš Bizjak from comment #7) > (In reply to Iain Sandoe from comment #6) > > for sysV5 psABI targets, the call site requirement is 64 for m32 and 126/256 > > for m64. > sysV5 requires 128bit alignment at the call site, but on linux no runtime > mechanism enforces this requirement. So, if it is possible to prove that the > called function doesn't need 128bit alignment, we can misalign the caller to > word size without consequences. From the trail of this PR, I suspect this is > not the case on Darwin. Correct; Darwin's dynamic loader enforces the alignment requirement.
