case RESULT_DECL:
decl_rtl = DECL_RTL (exp);
gcc_assert (decl_rtl);
+ decl_rtl = copy_rtx (decl_rtl);
Hmm. Ordinarily something like this would be fixed up by
unshare_all_decls, but this doesn't get called for globals.
You're probably unique in having full symbols be valid
references in some cases, and not in others.
Given that we go through the effort of unsharing them later,
I don't see that this is a bad patch at all. Indeed, you
might be able to eliminate unshare_all_decls, if indeed you've
found the only place that needs fixing.