RFR: 8253920: Share method trampolines in CDS dynamic archive [v2]

[Calvin Cheung]

> This patch is to allow sharing of the same method trampoline for archived Methods with the same AdapterHandleEntry when using CDS dynamic archive. 
> 
> Running javac on HelloWorld with CDS dynamic archive, the number of calls to SharedRuntime::generate_trampoline() is reduced to 406 times vs 12601 times without the patch.
> 
> In terms of saving on instructions and time (on linux-x64):
> instr delta =     -2807662    -0.1369%
> time  delta =       -6.860 ms -1.8798%
> 
> It passed tiers 1,2,3,4 testing.

Calvin Cheung has updated the pull request incrementally with one additional commit since the last revision:

  update per review comment

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/868/files
  - new: https://git.openjdk.java.net/jdk/pull/868/files/af513fb1..213262ea

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=868&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=868&range=00-01

  Stats: 13 lines in 1 file changed: 0 ins; 1 del; 12 mod
  Patch: https://git.openjdk.java.net/jdk/pull/868.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/868/head:pull/868

PR: https://git.openjdk.java.net/jdk/pull/868