RFR(S): 8147645: get_ctrl_no_update() code is wrong

[Roland Westrelin]

The intrinsify_fill() code doesn’t mark a replaced control as dead. As suggested in the bug, I added an assert to 
get_ctrl_no_update() so we don’t use a loop as a control by accident. I also dropped 
lazy_replace_proj() which is obsolete AFAICT.

http://cr.openjdk.java.net/~roland/8147645/webrev.00/

Roland.