RFR(S): 8026495: JVM Crashes when started with -XX:+DTraceMethodProbes on Solaris x86_64

[Igor Veresov]

A bunch of problems here, starting from use of wrong calling convention in LIR_Assembler::emit_unwind_handler() - it simply hasn't been ported to 64bit.
Also, there are a bunch of holes left in C1 to support T_METADATA. The relevant for this problem are the calling convention generation, and the register allocator support.

Webrev: http://cr.openjdk.java.net/~iveresov/8026495/

Testing: Java2Demo with -XX:+DTraceMethodProbes, JPRT run in progress

igor