[foreign-memaccess] RFR 8227548: AddressVarHandleGenerator produces unverifiable code

[Maurizio Cimadamore]

Hi,
turns out that there were other places which were triggering verifier 
errors. I tried to run TestMemoryAccess (the test which executes more VH 
shapes) and I discovered many issues:

* a bunch of methods were missing the ASM call to auto-generate 
stack/local size

* one method was missing a cast after a CP patch ldc

* the name of the generated class was wrong - as it was missing the 
package name (should be in j.l.invoke)

Also, since I was there, I realized that the indirection via a MH was 
not necessary when calling the memory address helper. So I replaced the 
call to invokeExact with a more direct invokestatic to the desired method.

To make sure I reran all the benchmarks and everything looks stable - no 
loss, no gain.

Webrev:

http://cr.openjdk.java.net/~mcimadamore/panama/8227548/

Cheers
Maurizio