[PATCH] Filter out Pseudo nodes in ScheduleDAGVLIW

[Stefan Hepp]

Hi,

ScheduleDAGVLIW uses the HazardRecognizer, but does not filter out any 
Pseudo nodes, causing the ScoreboardHazardRecognizer to run into an 
assertion:

virtual void 
llvm::ScoreboardHazardRecognizer::EmitInstruction(llvm::SUnit *): 
Assertion `MCID && "The scheduler must filter non-machineinstrs"' failed.

I copied the EmitNode function from ScheduleDAGRRList which does exactly 
that and added it to ScheduleDAGVLIW, and filtered out COPY_TO_REGCLASS 
in the ResourcePriorityQueue, now the VLIW scheduler also works for my 
custom backend (and the llvm tests still work).

I attached the patch to this email. It is against LLVM 3.2, but the 
relevant code has not changed in upstream.

Regards,
  Stefan
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