[Bug fortran/52861] (missed optimisation) missed transformation to memset with -O3

[tkoenig at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52861

--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> 2012-06-07 11:12:02 UTC ---
Author: tkoenig
Date: Thu Jun  7 11:11:55 2012
New Revision: 188300

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=188300
Log:
2012-06-07  Thomas König  <tkoenig@gcc.gnu.org>

    PR fortran/52861
    * frontend-passes (empty_string):  Add prototype.
    (optimize_assignment):  Set the length of an empty string
    constant to zero.

2012-06-07  Thomas König  <tkoenig@gcc.gnu.org>

    PR fortran/52861
    * gfortran.dg/string_assign_1.f90:  New test case.


Added:
    trunk/gcc/testsuite/gfortran.dg/string_assign_1.f90
Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/frontend-passes.c
    trunk/gcc/testsuite/ChangeLog