PR middle-end/92825
* cfgexpand.c (add_stack_protection_conflicts): Change return type
from void to bool, return true if at least one stack_vars[i].decl
is addressable.
(record_or_union_type_has_array_p, stack_protect_decl_p): Remove.
(expand_used_vars): Don't call stack_protect_decl_p, instead for
-fstack-protector-strong set gen_stack_protect_signal to true
if add_stack_protection_conflicts returned true. Formatting fixes.
* doc/invoke.texi (-fstack-protector-strong): Clarify that optimized
out variables or variables not living on the stack don't count.
(-fstack-protector): Likewise. Clarify it affects >= 8 byte arrays
rather than > 8 byte.
* gcc.target/i386/pr92825.c: New test.
From-SVN: r279193
