| commit | b028da6407c0921fd21fc65e7b18197e77dba684 | [log] [tgz] |
|---|---|---|
| author | Mayank Patke <fishythefish@google.com> | Tue Feb 07 20:07:57 2023 +0000 |
| committer | Commit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com> | Tue Feb 07 20:07:57 2023 +0000 |
| tree | b4cd7812426e2bbfd33a45c8181a6cc7b9e0b911 | |
| parent | ff01414b8f1643926b9bf66877e445dbb5393ab7 [diff] |
[dart2js] Add a 'FALSE' JS_GET_FLAG.
There are a few places in our runtime libraries where we have some code
guarded by `if (false)`. This is to ensure that the guarded code is
marked as used and compiled, but not emitted unless rewritten during
SSA. This pattern is somewhat brittle - a kernel
optimization/transformation which eliminates dead code may discard the
code.
Instead, we can write `if (JS_GET_FLAG('FALSE'))`, which will only be
written to `if (false)` and then discarded during SSA.
Change-Id: I8edc2b24e5fbeece1f042ff3d0c87d58e939bf84
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/271800
Reviewed-by: Stephen Adams <sra@google.com>
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