Lennart Augustsson wrote:
It's not that hard to figure out an order to permute the arguments on
the stack before a tail call that minimizes that number of moves and
temporary locations. Lmlc did this 20 years ago. :)
Right, and that's what GHC does too, with a strongly-connected-component
analysis of the dependencies between assignments of the args for the tail call.
Cheers,
Simon
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