RFR(XS): 8134288 compiler/runtime/6859338/Test6859338.java crashes in PhaseIdealLoop::try_move_store_after_loop

[Roland Westrelin]

http://cr.openjdk.java.net/~roland/8134288/webrev.00/

Stores from code generated by c2 to update profiling (profile_taken_branch() called from Parse::do_if() if ProfileInterpreter is off)) doesn’t have a control. This looks like a corner case so I went for the simplest fix and excluded stores with no controls from the logic that tries to move stores out of loops.

Roland.