Request for review(XL): 6985015: C1 needs to support compressed oops

[Vladimir Kozlov]

Typo in assembler_sparc.cpp, should be srl().

I have the same comment as Christian's about using separate lduw/stw and
decode/encode, they should be combined if you can't use existing functions.

Looks good otherwise.

Thanks,
Vladimir

Igor Veresov wrote:
> This change implements compressed oops for C1 for x64 and sparc.
> The changes are mostly on the codegen level, with a few exceptions when 
> we do access things outside of the heap that are uncompressed from the IR.
> 
> Webrev: http://cr.openjdk.java.net/~iveresov/6985015/webrev.00/
> 
> Thanks,
> igor