re PR rtl-optimization/69102 (ICE: in move_op_ascend, at sel-sched.c:6138 with -fselective-scheduling2)

gcc/
        PR rtl-optimization/69102
        * sched-deps.c (sched_analyze_insn): Do not set last_args_size field
        when we have a readonly dependency context.

testsuite/

        PR rtl-optimization/69102
        * gcc.c-torture/compile/pr69102.c: New test.

From-SVN: r234359