[threads] Update TypeSSA for shared types #6753
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Normally, values of different types can never compare equal to each other, but since i31refs are not actually allocations, `ref.eq` has no way to differentiate a shared i31ref and an unshared i31ref with the same value, so it will report them as equal. Update the implementation of value equality to reflect this correctly.
When creating a new subtype, make sure to copy the supertype's shareability.
kripken approved these changes Jul 16, 2024
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When creating a new subtype, make sure to copy the supertype's
shareability.