------- Comment #10 from hjl at lucon dot org 2006-08-21 17:42 ------- I have a mixed feeling toward this. On one hand, gcc does assume 16byte stack aligment. On the other hand, the original ia32 psABI only calls for 4 byte stack aliment. Requiring 16 byte aligment will make sure the outputs from gcc will be compatible with each other. But it means that the outputs from gcc aren't 100% compatible with the outputs from other compilers, which only enforce 4byte stack aligment following the original ia32 psABI.
I guess that it may not be feasible to enforce 4byte stack aligment in gcc without code degradation. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27537