[Bug other/87220] -fstack-check produces inefficient and wrong tests

[joseph at codesourcery dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87220

--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot 
com> ---
What does -fstack-clash-protection give?  (-fstack-check is an old option 
for specific Ada requirements; for proper stack-clash protection for all 
languages you want -fstack-clash-protection instead.)