[llvm-commits] ideas for 10096

[Rafael Ávila de Espíndola]

> That is what I am trying to do, it is just a bit hard to do in the current
> code organization.

I realized that probably it is the way it is because a value number can be
 in many live ranges, so it is more efficient to handle them first.

I think I managed to plug in the current structure by faking a copy. I have
attached the current hackish version. It currently produces code like

vregX = vregZ
vregX = vregZ

when it runs and that confuses other parts of the coalescer. I will try to
debug and send for review tomorrow.

Thanks,
Rafael
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