Reads an instruction out of the stream at the specified address.

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Keep most of this inline as it's on the code path that is being timed

Returns the number of bits required to hold the largest positive number that can be represented by |type|.

NOTE: The builder holds the actual data, so it must live as long as the dex file.

Add dbi_call handler before running the origin instructions

Add post_call(epilogue) handler before `Return` of the origin function, as implementation is replace the origin `Return Address` of the function.

Add pre_call(prologue) handler before running the origin function,

Calculate the current load factor and return it.

Returns whether the given memory offset can be used for generating an implicit null check.