[Bug tree-optimization/42108] [4.8/4.9 Regression] 50% performance regression

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42108

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |5.0
            Summary|[4.8/4.9/5 Regression] 50%  |[4.8/4.9 Regression] 50%
                   |performance regression      |performance regression
      Known to fail|                            |4.3.6

--- Comment #67 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk (sofar).

--- Comment #68 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Dec 11 15:52:47 2014
New Revision: 218630

URL: https://gcc.gnu.org/viewcvs?rev=218630&root=gcc&view=rev
Log:
2014-12-11  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/42108
    * trans-stmt.c (gfc_trans_do): Execute the division computing
    countm1 before the loop entry check.

    * gfortran.dg/pr42108.f90: Amend.

Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/trans-stmt.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gfortran.dg/pr42108.f90