[Bug fortran/83705] [8 Regression] ICE/wrong code with large values of REPEAT after revision r256284

[jb at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83705

--- Comment #8 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Author: jb
Date: Thu Feb  1 07:41:03 2018
New Revision: 257281

URL: https://gcc.gnu.org/viewcvs?rev=257281&root=gcc&view=rev
Log:
PR 83705 Repeat with large values

This patch fixes the regression by increasing the limit where we fall
back to runtime to 2**28 elements, which is the same limit where
previous releases failed. The are still bugs in the runtime
evaluation, so in many cases longer characters will still fail, so
print a warning message.

Regtested on x86_64-pc-linux-gnu.

gcc/fortran/ChangeLog:

2018-02-01  Janne Blomqvist  <jb@gcc.gnu.org>

        PR fortran/83705
        * simplify.c (gfc_simplify_repeat): Increase limit for deferring
        to runtime, print a warning message.

gcc/testsuite/ChangeLog:

2018-02-01  Janne Blomqvist  <jb@gcc.gnu.org>

        PR fortran/83705
        * gfortran.dg/repeat_7.f90: Catch warning message.

Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/simplify.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gfortran.dg/repeat_7.f90