Re: Do we have free bits in the info pointer itself?

Mostly just that GHC still works on 32 bit platforms. -Edward On Wed, Sep 7, 2016 at 5:32 PM, Ryan Newton wrote:

Our heap object header is one word -- an info table pointer https://ghc.haskell.org/trac/ghc/wiki/Commentary/Rts/Storage/HeapObjects .

Well, a 64 bit info table pointer leaves *at least* 16 high bits inside the object header for other purposes, right?

Is there any problem with using these other than having to mask the info table pointer each time it is dereferenced?

Thanks, -Ryan

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