https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95237
--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> --- (In reply to Kito Cheng from comment #6) > Created attachment 48658 [details] > i386-Implement-ROUND_TYPE_ALIGN-to-make-sure-alignme.patch > > Some optimization might made decision depend on the alignment, and alignment > shrinking might made the decision become wrong. Nothing will happen on i386 if alignment of long long isn't 8 bytes. > So I prefer keep the assertion checking and implement ROUND_TYPE_ALIGN for > x86, so that it will set the alignment properly from the beginning. > > PoC/untested patch attached. The i386 psABI specifies 4 byte alignment for long long. But we want to use 8 byte alignment if there is no ABI implication and no stack realignment is needed. Will ROUND_TYPE_ALIGN always align long long to 8 bytes?