[Bug middle-end/70992] Infinite recursion between fold_build2_stat_loc and fold_binary_loc w/ -fwrapv

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70992

--- Comment #8 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Wed Jul 26 11:53:17 2017
New Revision: 250566

URL: https://gcc.gnu.org/viewcvs?rev=250566&root=gcc&view=rev
Log:
        PR middle-end/70992
        * tree.c (build2_stat): Don't set TREE_CONSTANT on divisions by zero.

        * gcc.dg/overflow-warn-1.c: Adjust dg-error.
        * gcc.dg/overflow-warn-2.c: Likewise.
        * gcc.dg/overflow-warn-3.c: Likewise.
        * gcc.dg/overflow-warn-4.c: Likewise.
        * gcc.dg/torture/pr70992-2.c: New test.
        * gcc.dg/torture/pr70992.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr70992-2.c
    trunk/gcc/testsuite/gcc.dg/torture/pr70992.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/overflow-warn-1.c
    trunk/gcc/testsuite/gcc.dg/overflow-warn-2.c
    trunk/gcc/testsuite/gcc.dg/overflow-warn-3.c
    trunk/gcc/testsuite/gcc.dg/overflow-warn-4.c
    trunk/gcc/tree.c