| commit | 510cf2b25853bc43b9f49bafc77b82066d52dbd4 | [log] [tgz] |
|---|---|---|
| author | Paul Berry <paulberry@google.com> | Fri Jan 13 14:25:58 2023 +0000 |
| committer | Commit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com> | Fri Jan 13 14:25:58 2023 +0000 |
| tree | a01576db96070f482254c83684a83bf7d604e534 | |
| parent | abafed8cfcdd97ad06221a484caa54dedda39fe8 [diff] |
Flow analysis: fix synthetic break insertion for unreachable switch cases Previously, if a switch case was unreachable, we would not insert a synthetic break at the end of it. Technically this is not a problem (since a synthetic break is only required to prevent one case from falling through to another at runtime, and unreachable code is by definition never reached at runtime). However, it makes it confusing for CFE and back-end developers, and there's little harm in adding the synthetic break anyway. So with this change, we determine whether to add the synthetic break by checking whether the bottom of the case block is reachable *from its top* (rather than globally reachable). Fixes #50994. Bug: https://github.com/dart-lang/sdk/issues/50994 Change-Id: I17757b182c29da782457adc057b1b8a6fc91e55e Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/278897 Reviewed-by: Johnni Winther <johnniwinther@google.com> Commit-Queue: Paul Berry <paulberry@google.com>
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