Request for review (M): 7029017 Additional architecture support for c2 compiler

[Vladimir Kozlov]

Roland,

Did you consider to use Matcher property instead of new flag and new ideal node 
code? See how we do Matcher::clone_shift_expressions.

Vladimir

Roland Westrelin wrote:
> http://cr.openjdk.java.net/~roland/7029017/webrev.00/
> 
> Main changes are:
> - Enables cross building of a c2 VM.
> - Support masking of shift counts when the processor architecture 
> mandates it.
> 
> Roland.