Remove no longer used half of RTTI #2555
Merged
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The compiler no longer depends on embedded RTTI, in particular base class ids (see #2548, where
instanceof
helpers are now compiler-generated). There are still two uses of RTTI outside of the compiler itself, though: One is to determine pointer-free objects during GC, and the other is the loader, that both rely on type flags. The pointer-free use case is important enough to at least keep the flags, so this PR slashes RTTI in half, removing the base class id alongside the now unused programmatic__instanceof
helper.