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Subject: [Bug libfortran/52537] slow trim function
Date: Fri, 11 May 2012 14:16:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52537

--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> 2012-05-11 13:56:16 UTC ---
Author: tkoenig
Date: Fri May 11 13:56:06 2012
New Revision: 187406

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=187406
Log:
2012-05-11  Thomas Koenig  <tkoenig@gcc.gnu.org>

    PR fortran/52537
    * frontend-passes.c (optimize_op):  Change
    old-style comparison operators to new-style, simplify
    switch as a result.
    (empty_string):  New function.
    (get_len_trim_call):  New function.
    (optimize_comparison):  If comparing to an empty string,
    use comparison of len_trim to zero.
    Use new-style comparison operators only.
    (optimize_trim):  Use get_len_trim_call.

2012-05-11  Thomas Koenig  <tkoenig@gcc.gnu.org>

    PR fortran/52537
    * gfortran.dg/string_compare_4.f90:  New test.


Added:
    trunk/gcc/testsuite/gfortran.dg/string_compare_4.f90
Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/frontend-passes.c
    trunk/gcc/testsuite/ChangeLog