[MLton] Shortening dependency chains in the x86 codegen

[Wesley W. Terpstra]

On Jan 7, 2007, at 5:57 PM, Vesa Karvonen wrote:
> IOW, the idea is to systematically, after a register-to-register copy,
> swap the roles of the registers, so that the target of the copy  
> isn't the
> target (or source) of the subsequent op.

I think this is a pretty good idea. I have no idea how to implement  
it, though. I imagine it's in the x86 codegen. It might not always be  
the case that people operate on the copy first, but I think you're  
right that heuristically speaking this is more common.