[Bug c++/60272] atomic<>::compare_exchange_weak has spurious store and can cause race conditions

[rth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60272

--- Comment #5 from Richard Henderson <rth at gcc dot gnu.org> ---
Author: rth
Date: Fri Feb 21 00:11:43 2014
New Revision: 207972

URL: http://gcc.gnu.org/viewcvs?rev=207972&root=gcc&view=rev
Log:
PR c++/60272

        * builtins.c (expand_builtin_atomic_compare_exchange): Always make
        a new pseudo for OLDVAL.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/builtins.c