RFR [S] 8030076:remove unused runtime related code

[Bertrand Delsart]

Hi all,

Simple review for some dead code elimination

https://bugs.openjdk.java.net/browse/JDK-8030076

http://cr.openjdk.java.net/~bdelsart/8030076/webrev.00/webrev/

The unused removed methods are:
  frame::interpreter_frame_equals_unpacked_fp
  (uselessly implemented on most platforms)
  MacroAssembler::throw_WrongMethodType_entry

The only non trivial change is the removal of an obsolete comment and 
assert in hotspot/src/share/vm/runtime/sharedRuntime.cpp :

-  // Get the address of the ic_miss handlers before we grab the
-  // AdapterHandlerLibrary_lock. This fixes bug 6236259 which
-  // was caused by the initialization of the stubs happening
-  // while we held the lock and then notifying jvmti while
-  // holding it. This just forces the initialization to be a little
-  // earlier.
-  address ic_miss = SharedRuntime::get_ic_miss_stub();
-  assert(ic_miss != NULL, "must have handler");

First the comment is misleading since the call to get_ic_miss_stub (no 
longer) fixes anything. It is simple read accessor.

If the ic_miss_stub has not yet been generated, the accessor itself 
contains an assert that will fire if we really need the ic_miss_stub. 
Hence, the above assert is no longer useful... and we removed it because 
it did lead to issues with one of our closed extension, which avoided to 
uselessly generate the ic_miss_handler.

Regards,

Bertrand.

-- 
Bertrand Delsart,                     Grenoble Engineering Center
Oracle,         180 av. de l'Europe,          ZIRST de Montbonnot
38330 Montbonnot Saint Martin,                             FRANCE
bertrand.delsart at oracle.com             Phone : +33 4 76 18 81 23

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