tree 03dac7dd2418cb2b100e8628974d60a1f2ccbf90
parent d35358426ca988fe914408202c2020993b06b972
author Johnni Winther <johnniwinther@google.com> 1561464187 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1561464187 +0000

[dart2js] Support serialization of tree nodes in a known member context

* allows for a more compact encoding since every serialized
  ir.TreeNode doesn't have to be prefixed by a references to its
  surrounding member
* faster encoding since the surround member doesn't have to be found
  for each serialized tree node
* better assertion message when trying to serialize an orphaned tree node

Change-Id: I1a5411d134a8c36c00b6f4164617bc0dce631009
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/106088
Commit-Queue: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Stephen Adams <sra@google.com>