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Seth Brenith authored
Originally, the Torque-generated verifier for a field with type Undefined|Zero|NonNullForeign would check `f.IsUndefined() || f.IsZero() || f.IsNonNullForeign()`. At some point, we changed Torque so that it now generates the much weaker `f.IsOddball() || f.IsSmi() || f.IsForeign()`. This change returns the verifiers to their initial precision. Mostly we can use the names of abstract types to build up the correct type check expression, but a few abstract types like PodArrayOfWasmValueType have no way that we can tell them apart from their parent type at runtime. It would be confusing to have a function Object::IsPodArrayOfWasmValueType which actually just checks whether the object is a ByteArray, so this change introduces a new annotation which allows abstract type declarations to state that they should use their parent type during verification. This change also adds new test cases to help avoid future regressions of this logic. Bug: v8:7793 Change-Id: Ie5046d742fd45e0e0f6c2ba387d909e9f2ac6df1 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2469960Reviewed-by: Clemens Backes <clemensb@chromium.org> Reviewed-by: Tobias Tebbi <tebbi@chromium.org> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com> Cr-Commit-Position: refs/heads/master@{#70698}
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