On 18/07/2012, at 11:45 AM, Geoff Leyland wrote: > If I get to the point that I'm confident that it works, and that it actually > seems to do something, then I'll see if it saves allocations. Could any of the recent commits have had a (positive) effect on a patch for sinking ADDOV/SUBOV? Particularly 834ff6d3? I just pulled and the patch seems to work now. However, when I say "work", I mean I no longer seem to have any real code that triggers it. The only case I had before would seem to have been in error, and caused problems.