[Bug c++/65970] [C++14] Endless loop with constexpr

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65970

--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Jul 25 18:32:13 2016
New Revision: 238730

URL: https://gcc.gnu.org/viewcvs?rev=238730&root=gcc&view=rev
Log:
        PR c++/65970 - constexpr infinite loop

gcc/c-family/
        * c.opt (fconstexpr-loop-limit): New.
gcc/cp/
        * constexpr.c (cxx_eval_loop_expr): Count iterations.
        * cp-gimplify.c (genericize_cp_loop): Use start_locus even for
        infinite loops.

Added:
    trunk/gcc/testsuite/g++.dg/cpp1y/constexpr-loop6.C
Modified:
    trunk/gcc/c-family/ChangeLog
    trunk/gcc/c-family/c.opt
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/constexpr.c
    trunk/gcc/cp/cp-gimplify.c
    trunk/gcc/doc/invoke.texi