This patch changes the function cilk_gimplify_call_params_in_spawned_fn to use gimplify_arg instead of gimplify_expr. It fixes an ICE when calling a function with a constructed empty class as the argument.

Bootstrapped and regression tested on x86_64-linux.

2016-01-15  Ryan Burn  <contact@rnburn.com>

        PR cilkplus/69267
        * cilk.c (cilk_gimplify_call_params_in_spawned_fn): Change to use
        gimplify_arg. Removed superfluous post_p argument.
        * c-family.h (cilk_gimplify_call_params_in_spawned_fn): Removed
        superfluous post_p argument.
        * c-gimplify.c (c_gimplify_expr): Likewise.

gcc/cp/ChangeLog:

2016-01-15  Ryan Burn  <contact@rnburn.com>

        PR cilkplus/69267
        * cp-gimplify.c (cilk_cp_gimplify_call_params_in_spawned_fn): Removed
        superfluous post_p argument in call to
        cilk_gimplify_call_params_in_spawned_fn.

gcc/testsuite/ChangeLog:

2016-01-15  Ryan Burn  <contact@rnburn.com>      
                                                                                          
PR cilkplus/69267
* g++.dg/cilk-plus/CK/pr69267.cc: New test.