[Bug rtl-optimization/56434] document that __attribute__((__malloc__)) assumes returned pointer has BIGGEST_ALIGNMENT

[chip at pobox dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56434

--- Comment #5 from Chip Salzenberg <chip at pobox dot com> 2013-02-25 20:02:24 UTC ---
Indeed.  So MALLOC_ABI_ALIGNMENT should perhaps default to the largest
alignment of all the C89 types, with platform overrides as needed?