[llvm] r178845 - Fix bug in PEI's virtual-register scavenging

[Krzysztof Parzyszek]

On 4/5/2013 12:46 PM, Krzysztof Parzyszek wrote:
>
> Wouldn't it be easier to "tell" the scavenger that the scavenged
> register is now "used"?

Actually, this already happens in PEI.  They key thing is to tell the 
scavenger about the kills in the instruction which formerly had virtual 
registers.  Unless I'm missing something, this fix looks like an overkill.

-Krzysztof

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