RFR: 8330851: C2: More efficient TypeFunc creation [v6]

[Amit Kumar]

> Lazy computation of TypeFunc.
> 
> Testing: Tier1 on Fastdebug & Release VMs (`s390x architecture`)

Amit Kumar has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 12 commits:

 - Merge branch 'master' into tf_v2
 - test fix
 - Merge branch 'master' into tf_v2
 - fixing the merge conflict
 - cover more TypeFunc objects
 - refactor
 - extra space
 - inline accessor methods
 - Revert "mac build workaround"
   
   This reverts commit ac2fe31d1f134f8d29aea5e6816ec77f0719845a.
 - final change
 - ... and 2 more: https://git.openjdk.org/jdk/compare/45331091...f051e538

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

Changes: https://git.openjdk.org/jdk/pull/21782/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21782&range=05
  Stats: 1059 lines in 9 files changed: 736 ins; 73 del; 250 mod
  Patch: https://git.openjdk.org/jdk/pull/21782.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21782/head:pull/21782

PR: https://git.openjdk.org/jdk/pull/21782