[Bug middle-end/68855] PAREN_EXPR not "ignored" where possible

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68855

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Maybe:
(simplify
 (paren (complex_expr @0 @1))
 (complex_expr (paren @0) (paren @1))
(simplify
 (paren (real_expr @0))
 (real_expr (paren @0))
(simplify
 (paren (imag_expr @0))
 (real_expr (paren @0))

Is enough.