Optimal for loop on the 68020.

[Jef Poskanzer]

In the referenced message, edler at cmcl2.UUCP (Jan Edler) wrote:
}However, the compiler shouldn't do either of these when d0 is initialized
}to a value < 65536.

Not good enough, since the loop body might modify the index variable.
If the compiler is smart enough to do a global semantic check for this
sort of thing, then you can do this optimization; but we've already
established that cc and gcc aren't that smart.
---
Jef

   Jef Poskanzer   {ucbvax, lll-crg, sun!pacbell, apple, hplabs}!well!pokey
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