[Wasm GC] RefIs / RefEq / RefTest return a boolean (#4786)

This marks all reference operations that return 0/1 as doing so. This
allows various bitwise operations to be optimized on them.

This also marks StringEq as a boolean, though we can't test that fully yet
as Strings support is wip (no interpreter or other stuff yet).

As a driveby this moves emitsBoolean to its own file, and uses it
in getMaxBits to avoid redundancy (the redundant code paths now have
a WASM_UNREACHABLE).

0 files changed, 0 insertions, 0 deletions