[Bug fortran/19310] unnecessary error for overflowing results

[jvdelisle at gcc dot gnu dot org]

------- Comment #7 from jvdelisle at gcc dot gnu dot org  2006-06-18 06:36 -------
Subject: Bug 19310

Author: jvdelisle
Date: Sun Jun 18 06:36:45 2006
New Revision: 114752

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=114752
Log:
2006-06-18  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

        PR fortran/19310
        * 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:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/arith.c
    trunk/gcc/fortran/gfortran.h
    trunk/gcc/fortran/invoke.texi
    trunk/gcc/fortran/lang.opt
    trunk/gcc/fortran/options.c
    trunk/gcc/fortran/simplify.c
    trunk/gcc/fortran/trans-const.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19310