| commit | 203d14e9ae2bebc8d8ba2241b537ffad40ad4a9f | [log] [tgz] |
|---|---|---|
| author | Alexander Markov <alexmarkov@google.com> | Sat Nov 19 17:26:27 2022 +0000 |
| committer | Alexander Markov <alexmarkov@google.com> | Sat Nov 19 17:26:27 2022 +0000 |
| tree | 840441c885996a415f0018e45dd4a3a393678c1d | |
| parent | 657d2c945c6e5518ace546ff70803155e9b45f31 [diff] |
[stable] [vm/aot/tfa] Fix handling of type parameter nullability in factory constructors
TFA represents type parameters inside factory constructors as
additional parameters. In a summary, type parameter type is represented
simply as a reference to a parameter. This approach ignores
nullability of a type parameter type, which is not correct.
This change add a new ApplyNullability operation to a summary in order
to apply any extra nullability ('?' or '*') on top of the type argument
passed to a factory constructor.
TEST=pkg/vm/testcases/transformations/type_flow/transformer/regress_50392_nnbd_strong.dart
Fixes https://github.com/dart-lang/sdk/issues/50392
Cherry-pick: https://dart-review.googlesource.com/c/sdk/+/268381
Change-Id: I74080813663fbb7176ad30c0daf9f75de087506b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/268500
Reviewed-by: Siva Annamalai <asiva@google.com>
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