Request for review(S): 6988346: 6986046 breaks tiered

[Igor Veresov]

6986046 introduced two problems that are covered by this CR:
- the profiling code generation needs to be adjusted to use the new 
ValueStack implementation.
- SunStudio S12u1 has problems with c1_LinearScan.cpp on 64bit x86, 
which results in incorrect code. The optimization level needs to 
temporarily lowered for this case.

Webrev: http://cr.openjdk.java.net/~iveresov/6988346/webrev.00/


Thanks,
igor