------- Comment #6 from jakub at gcc dot gnu dot org 2009-09-01 09:28 ------- IMHO either standard options compiled code shouldn't be called from -mpreferred-stack-boundary=2 code, or it needs to be compiled with -mincoming-stack-boundary=2. But it should be user's responsibility. Ensuring by default outgoing calls are 16 byte aligned, but not assuming it is just a very stupid thing to do and unnecessarily penalizes normal users. It is certainly not true that most code is compiled with -mpreferred-stack-boundary=2, only kernel and a handful of packages is by default, and kernel has its own ABI (and doesn't use FPU nor SSE*).
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41156
