[Bug tree-optimization/69990] decl alignment not respected

[amodra at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69990

--- Comment #2 from Alan Modra <amodra at gmail dot com> ---
Created attachment 37817
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37817&action=edit
prevent var alias

Jan, does this look reasonable?