[Bug target/31263] addressing modes are not selected correcly for x86 always

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=31263

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2021-12-25
           Severity|minor                       |enhancement
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
  _1 = i_10 + 500;
  _2 = _1 * 2;
  _3 = _2 - i_10;
  _4 = _3 - i_10;

(simplify
 (minus (mult:s (plus:cs @0 @1) INTEGER_CST@2) @0)
  (plus (mult @0 (minus @2 { build_one_cst (type); }) (mult @1 @2))))

Will work for the above case though I don't know if it is the right thing to do
as we are trading one mult for 2 in some cases.