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Chris Tate
2ebb89b0ef
An int32 array candidate can now be a module global or a parameter, not only a local. A number[] parameter qualifies when its function is reached by direct calls alone (not as a value, a method or a constructor, and not through a result-slot entry the backend calls in its place), it is never written, and every call passes a candidate at its position; a local, global or parameter may then be passed there as well. A global qualifies when every function reads it only in candidate positions and every write stores a fresh array. moduleInt32ArrayCandidates finds them by dropping, pass after pass, the ones a function or call disqualifies. The candidates one array can reach through calls form a group (int32ArrayGroups): the int32 slot analysis keeps or drops a group as one, since a store through any member writes the same array. A module with a module namespace object keeps its globals in doubles, as member reads can reach any global by name.