Andrew Haley <aph-gcc@xxxxxxxxxxxxxxxxxxx> writes: > Geer Bosch asked "Can't we just explicitly align the stack frame to > 128-bits during the function prologue, when we know that there are > locals that require such alignment?" This seems so obvious that I > can't understand why it hasn't been done. If you don't trust your startup code, use -mstackrealign or the force_align_arg_pointer function attribute. We don't do it by default because it is slower and most people don't need it. Ian