[Bug fortran/45318] Do more parenthesis simplification with -fno-protect-parens

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45318

--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Given Richard's comments and no testcase, I'm in doubt if this PR 
> is meaningful?!

Any new opinion about this PR? or should we close it as WONTFIX.

NOTE: I'ld like very much that the -no-protect-parens be removed from -Ofast!-(