[Bug fortran/19904] [4.1 Only] Division by zero leads to error

["jvdelisle at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #8 from jvdelisle at gcc dot gnu dot org  2006-06-28 05:37 -------
Subject: Bug 19904

Author: jvdelisle
Date: Wed Jun 28 05:36:08 2006
New Revision: 115048

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=115048
Log:
2006-06-27  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

        PR fortran/19310
        PR fortran/19904
        * arith.c (gfc_range_check): Return ARITH_OK if -fno-range-check. Add
        return of ARITH_NAN, ARITH_UNDERFLOW, and ARITH_OVERFLOW.
        (gfc_arith_divide): If -fno-range-check allow mpfr to divide by zero.
        * gfortran.h (gfc_option_t): Add new flag.
        * invoke.texi: Document new flag.
        * lang.opt: Add option -frange-check.
        * options.c (gfc_init_options): Initialize new flag.
        (gfc_handle_options): Set flag if invoked.
        * simplify.c (range_check): Add error messages for
        overflow, underflow, and other errors.
        * trans-const.c (gfc_conv_mpfr_to_tree): Build NaN and Inf from mpfr
        result.

Modified:
    branches/gcc-4_1-branch/gcc/fortran/ChangeLog
    branches/gcc-4_1-branch/gcc/fortran/arith.c
    branches/gcc-4_1-branch/gcc/fortran/gfortran.h
    branches/gcc-4_1-branch/gcc/fortran/invoke.texi
    branches/gcc-4_1-branch/gcc/fortran/lang.opt
    branches/gcc-4_1-branch/gcc/fortran/options.c
    branches/gcc-4_1-branch/gcc/fortran/simplify.c
    branches/gcc-4_1-branch/gcc/fortran/trans-const.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19904