Request for reviews (S): 7071709: JSR 292: switchpoint invalidation should be pushed not pulled

[Christian Thalinger]

http://cr.openjdk.java.net/~twisti/7071709/

7071709: JSR 292: switchpoint invalidation should be pushed not pulled
Reviewed-by:

SwitchPoints use a MutableCallSite for its implementation.  The fix is
to treat the target field of constant CallSites as a compile time
constant and add a dependence for invalidation of the optimization.

src/share/vm/opto/memnode.cpp
src/share/vm/opto/parse3.cpp