[threads] Simplify and generalize heap type writing without GC #6765
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We represent `ref.null`s as having bottom heap types, even when GC is not enabled. Bottom heap types are a feature of the GC proposal, so in that case the binary writer needs to write the corresponding top type instead. We previously had separate logic for this for each type hierarchy in the binary writer, but that did not handle shared types and would not have automatically handled other new types, either. Simplify and generalize the implementation and test that we can write `ref.null`s of shared types without GC enabled.
kripken
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Jul 17, 2024
tlively
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Jul 17, 2024
Similar to #6765, but for types instead of heap types. Generalize the logic for transforming written reference types to types that are supported without GC so that it will automatically handle shared types and other new types correctly.
tlively
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Jul 18, 2024
Similar to #6765, but for types instead of heap types. Generalize the logic for transforming written reference types to types that are supported without GC so that it will automatically handle shared types and other new types correctly.
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We represent
ref.nulls as having bottom heap types, even when GC isnot enabled. Bottom heap types are a feature of the GC proposal, so in
that case the binary writer needs to write the corresponding top type
instead. We previously had separate logic for this for each type
hierarchy in the binary writer, but that did not handle shared types and
would not have automatically handled other new types, either. Simplify
and generalize the implementation and test that we can write
ref.nullsof shared types without GC enabled.