Revert "[vm/compiler] Fine tune operator and phi handling."

This reverts commit 4d5b5bb5a6b46ce070437febbc1f2f4c0f6f9656.

Reason for revert: We are seeing an AOT compiler issue as a result of this change (please see https://github.com/flutter/flutter/issues/23879)

Original change's description:
> [vm/compiler] Fine tune operator and phi handling.
> 
> Rationale:
> Running an extra call specialization pass a bit later
> in the compiler passes stream (after types are propagated)
> recognizes more operators, which execute more efficiently.
> In addition, unboxing phis seems useful on all archs, not
> just 32-bit. These minor tweeks combined improve the prime
> number benchmark 3 fold.
> 
> https://github.com/flutter/flutter/issues/19677
> 
> Change-Id: Ib2102ce807c2f0a9f801542e0c4bc6a7673f552b
> Reviewed-on: https://dart-review.googlesource.com/69240
> Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
> Commit-Queue: Aart Bik <ajcbik@google.com>

TBR=vegorov@google.com,alexmarkov@google.com,asiva@google.com,ajcbik@google.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Change-Id: I46e420f9355bfc3c4a3f2fb9274f648e8a596d9a
Reviewed-on: https://dart-review.googlesource.com/c/83229
Reviewed-by: Siva Annamalai <asiva@google.com>
Reviewed-by: Aart Bik <ajcbik@google.com>
Commit-Queue: Siva Annamalai <asiva@google.com>
2 files changed
tree: 4db68deaed25991b92efcfce53252e3b991caee1
  1. .clang-format
  2. .gitattributes
  3. .gitconfig
  4. .github/
  5. .gitignore
  6. .gn
  7. .mailmap
  8. .packages
  9. .vpython
  10. AUTHORS
  11. BUILD.gn
  12. CHANGELOG.md
  13. CONTRIBUTING.md
  14. DEPS
  15. LICENSE
  16. PATENTS
  17. PRESUBMIT.py
  18. README.dart-sdk
  19. README.md
  20. WATCHLISTS
  21. build/
  22. client/
  23. codereview.settings
  24. dartdoc_options.yaml
  25. docs/
  26. pkg/
  27. runtime/
  28. samples-dev/
  29. samples/
  30. sdk/
  31. tests/
  32. third_party/
  33. tools/
  34. utils/
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