https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54412
--- Comment #38 from R Copley <rcopley at gmail dot com> --- (A patch to emit unaligned instructions should probably resolve bug 49001 instead of this one, 54412.) Could dynamic alignment be achieved, not for automatic variables and function parameters, but for registers spilled to the stack (due to register exhaustion, or because they may be clobbered)? So that users can write code that stores over-aligned objects on the heap only. If SEH is the problem, can alignment be accounted for in cases where SEH is not in use (if there are any such cases)? I'm thinking of -fno-exceptions, and dwarf (on x86) or setjump/longjump exceptions. Sorry if those are stupid questions.
