| commit | 92bf76d9e86c65564952cdd7e9e53ad76b501dce | [log] [tgz] |
|---|---|---|
| author | Tess Strickland <sstrickl@google.com> | Tue Nov 07 10:58:48 2023 +0000 |
| committer | Commit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com> | Tue Nov 07 10:58:48 2023 +0000 |
| tree | 94b8682d7c099013a9bfaeac6bd314c84862a39c | |
| parent | 2b36affd2c46264527cdca1e3d3fba706e331274 [diff] |
[pkg/vm] Handle switch statements in unreachable code eliminator.
Namely, if the tested expression for a switch statement is constant,
then we can remove any constant cases where the constants differ,
and if all but a single case is removed, we can replace the switch
with the case body.
If constant functions are not enabled, then getters annotated with
@pragma("vm:platform-const") are still evaluated with the constant
function evaluation machinery, but only those and no others (including
any functions called within an annotated getter). This way, functions
can be annotated with @pragma("vm:platform-const") without having to
rewrite them to be a single returned expression.
TEST=pkg/vm/test/transformations/unreachable_code_elimination
pkg/vm/test/transformations/vm_constant_evaluator
Issue: https://github.com/dart-lang/sdk/issues/50473
Issue: https://github.com/dart-lang/sdk/issues/31969
Change-Id: Ie290d2f1f469326238d66c3d9631f8e696685ff0
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/332760
Commit-Queue: Tess Strickland <sstrickl@google.com>
Reviewed-by: Chloe Stefantsova <cstefantsova@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
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