tree 7f9751dddad8aef9f8372137e5f46af52b2dbbc7
parent cdcb76e12bcc541a0f6ca74f2b6801b8c9688f90
author Vyacheslav Egorov <vegorov@google.com> 1542391049 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1542391049 +0000

[vm/compiler] Refactor representation of stores and loads in IL.

Make StoreIntanceField and LoadField instructions use a single uniform
abstraction: Slot (used to be called NativeFieldDesc), which represents
either a real Dart field (i.e. a field that has a corresponding Field object)
or a native VM field that does not have a corresponding Field object.

This refactoring eliminates raw stores/loads that were just using offsets
before - now we always know what kind of slots we are accessing and
this yields better aliasing information.

Change-Id: I2f48332d58258219565bd961764e8cc9dd4d75ce
Reviewed-on: https://dart-review.googlesource.com/c/74582
Commit-Queue: Vyacheslav Egorov <vegorov@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>