[Bug tree-optimization/33291] a+=2; a+=2 not simplified to a+=4; with -O3 (ok with gcc-4.2.1)

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2007-09-03 11:28 -------
  # VUSE <tab_56, SMT.9_58, SMT.10_60>
  D.2581_35 = this_2(D)->D.2503.a;
  D.2582_36 = (unsigned int) D.2581_35;
  D.2583_37 = D.2582_36 + 2;
  D.2584_38 = (int) D.2583_37;
  # tab_76 = VDEF <tab_56>
  # SMT.9_77 = VDEF <SMT.9_58>
  D.2529_3->a = D.2584_38;
  # VUSE <tab_76, SMT.9_77, SMT.10_60>
  D.2586_40 = this_2(D)->D.2503.a;
  D.2587_41 = (unsigned int) D.2586_40;
  D.2588_42 = D.2587_41 + 2;
  D.2589_43 = (int) D.2588_42;
  # tab_78 = VDEF <tab_76>
  # SMT.9_79 = VDEF <SMT.9_77>
  D.2529_3->a = D.2589_43;


hmmm, aliasing


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|minor                       |normal


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33291