[Bug rtl-optimization/123063] End of array of stack variable recalculated in every iteration of for loop

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123063

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization
          Component|middle-end                  |rtl-optimization

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
gimple level looks good:
```
  ivtmp.34_12 = (unsigned long) &v_copy;
  _9 = ivtmp.34_12 + 400;

  <bb 3> [local count: 265751102]:
  # vect_res_12.27_16 = PHI <vect_res_8.28_20(3), { 0, 0, 0, 0 }(2)>
  # ivtmp.34_3 = PHI <ivtmp.34_14(3), ivtmp.34_12(2)>
  _1 = (void *) ivtmp.34_3;
  vect__1.26_15 = MEM <vector(4) int> [(int *)_1];
  vect_res_8.29_17 = VIEW_CONVERT_EXPR<vector(4) unsigned int>(vect__1.26_15);
  vect_res_8.29_18 = VIEW_CONVERT_EXPR<vector(4) unsigned
int>(vect_res_12.27_16);
  vect_res_8.29_19 = vect_res_8.29_17 + vect_res_8.29_18;
  vect_res_8.28_20 = VIEW_CONVERT_EXPR<vector(4) int>(vect_res_8.29_19);
  ivtmp.34_14 = ivtmp.34_3 + 16;
  if (_9 != ivtmp.34_14)
    goto <bb 3>; [95.96%]
  else
    goto <bb 4>; [4.04%]
```