[LLVMdev] Possible LiveIntervals bug

[Evan Cheng]

Yes, you are probably right.

Evan

On May 8, 2008, at 3:31 PM, David Greene wrote:

> At line 1155 of LiveIntervalAnalysis.cpp (in
> LiveIntervals::rewriteInstructionsForSpills), should the condition
> be:
>
> if (ImpUse && MI != ReMatDefMI && MI != ReMatOrigDefMI)
>
> instead of:
>
> if (ImpUse && MI != ReMatDefMI)
>
> ?
>
> After all, ReMatDefMI is a clone of the original def instruction
> (ReMatOrigDefMI).  I'm seeing bad things happen, with intervals
> getting HUGE_VALF set as their weight because they happen to
> be used in RegMatOrigDefMI and MI doesn't match ReMatDefMI
> (because it's a clone and not really in the IR at all!).
>
>                                                  -Dave
>
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