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Short answer: no.
Adderall is comprised of amphetamine salts. "Salts" being the operative word, as that means they are good for dissolving in liquid (water, 96% alcohol, etc.) and not good for smoking. To protect your lungs, it is highly dis-recommended that you smoke salts, esepecially Adderall, which is mixed with not just amphetamine salts, but also fillers and dyes, none of which would be fun to smoke. You would either stop smoking before effects kicked in, or if you persisted in smoking, you would be in quite a bit of pain. The "high" from smoking would be a bitter and minor victory.
So, then, is it theoretically possible to smoke Adderall painlessly? Perhaps.
A preparation could be made in which amphetamine salts were dissolved in a very soluble liquid at a certain ratio. The salts would then need to be converted to their respective bases, then re-extracted via another liquid, which would then need to be evaporated. This procedure is known as an "acid-base extraction", and should not be attempted without chemistry experience, as all of the chemicals necessary are hazardous, and very precisce instrumentation would be required.
Unfortunately, in the end, the amount of amphetamine base which could theoretically be retrieved would be so small that the difficulty of preparing it would be considered an entire waste, so while it is theoretically possible, it is definitely not practical. In addition amphetamine freebase is a waxy oil."