tree e9b0693ea8414f58ee6facbb91ed4b5fbe4b219c
parent 85e3251f05326aa4868093c49b0830aa8ab0e083
author Johnni Winther <johnniwinther@google.com> 1536846797 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1536846797 +0000

Add tests for dynamic access in platform and dart2js code.

This is a step towards making our own code use Dart 2 rather that
Dart 1 semantics.

For instance, the js-runtime libraries often use `dynamic` to avoid
extra type checking in Dart 1 checked mode, which has the consequence
that we have _more_ checking in Dart 2 (or just worse inference
baselines).

The VM is now optimizing for the typed paths and we should therefore
avoid unneeded dynamic accesses in dart2js code itself.

Change-Id: I793ef6c478c4c1b8caa1513990baafc598c462d8
Reviewed-on: https://dart-review.googlesource.com/74380
Commit-Queue: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Stephen Adams <sra@google.com>