[Bug tree-optimization/63586] x+x+x+x -> 4*x in gimple

[kugan at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63586

kugan at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #36908|0                           |1
        is obsolete|                            |

--- Comment #6 from kugan at gcc dot gnu.org ---
Created attachment 36979
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36979&action=edit
proposed patch



With the updated pach now we have:

;; Function f4 (f4, funcdef_no=3, decl_uid=4162, cgraph_uid=3, symbol_order=3)

;; 1 loops found
;;
;; Loop 0
;;  header 0, latch 1
;;  depth 0, outer -1
;;  nodes: 0 1 2
;; 2 succs { 1 }
f4 (unsigned int x, unsigned int z, unsigned int k)
{
  unsigned int y;
  unsigned int reassocmul_12;
  unsigned int reassocmul_13;
  unsigned int _14;

  <bb 2>:
  reassocmul_12 = x_2(D) * 4;
  reassocmul_13 = z_6(D) * 3;
  _14 = reassocmul_13 + k_1(D);
  y_10 = _14 + reassocmul_12;
  return y_10;

}


Also, bootstrap and regression testing is clean for x86_64-none-linux-gnu.