RFR: Freeze functions

[Robbin Ehn]

Freeze functions

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

Commit messages:
 - WS
 - Assorted
 - Made frame sp class member
 - WS
 - Bug fix
 - Fixes

Changes: https://git.openjdk.java.net/loom/pull/156/files
 Webrev: https://webrevs.openjdk.java.net/?repo=loom&pr=156&range=00
  Stats: 210 lines in 2 files changed: 83 ins; 75 del; 52 mod
  Patch: https://git.openjdk.java.net/loom/pull/156.diff
  Fetch: git fetch https://git.openjdk.java.net/loom pull/156/head:pull/156

PR: https://git.openjdk.java.net/loom/pull/156