[VM] Bare instructions - Part 5: Get rid of CODE_REG indirection in SwitchableCalls

If the --use-bare-instructions flag is enabled we will:

  * Make call sites load the target directly from the pool (instead of
    the code object) - this saves one instruction (and an indirect load)

  * Ensure the object pool will have direct entry addresses by:

     - Letting the clustered snapshot reader change any StubCode::UnlinkedCall()
       in the object pool by it's monomorphic entry
     - Change the code patcher to patch SwitchableCalls by writing the
       monomorphic entry into the pool (instead of the code object)

Issue https://github.com/dart-lang/sdk/issues/33274

Change-Id: I4e41fc8e4461bde477cc559a6a4fccaaf3a350b5
Reviewed-on: https://dart-review.googlesource.com/c/86160
Commit-Queue: Martin Kustermann <kustermann@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
15 files changed
tree: 8037d97ff929047f99995e68d486aecbdfa743a5
  1. .github/
  2. build/
  3. client/
  4. docs/
  5. pkg/
  6. runtime/
  7. samples/
  8. samples-dev/
  9. sdk/
  10. tests/
  11. third_party/
  12. tools/
  13. utils/
  14. .clang-format
  15. .gitattributes
  16. .gitconfig
  17. .gitignore
  18. .gn
  19. .mailmap
  20. .packages
  21. .vpython
  22. AUTHORS
  23. BUILD.gn
  24. CHANGELOG.md
  25. codereview.settings
  26. CONTRIBUTING.md
  27. dartdoc_options.yaml
  28. DEPS
  29. LICENSE
  30. PATENTS
  31. PRESUBMIT.py
  32. README.dart-sdk
  33. README.md
  34. WATCHLISTS
README.md

Dart

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Using Dart

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