[LLVMdev] hazard scheduling nodes

[Jonas Paulsson]

Hi,

I am trying to add Hazard scheduling nodes after buildSchedGraph(), with a scheduler derived from ScheduleDAGInstrs. I get weird errors, so I wonder what I am doing wrong?

What I am doing right now is:

I have a created MI with opcode HAZARD that does not have parent, and I greate a SUnit(HazardMI). I use this one HazardMI for all hazard nodes.
I remove all edges using removePred.
I insert edges between Node -> hazardNode -> pred.

What is there to think about in this approach? I must be missing some detail...

Any help is appreciated,

Jonas Paulsson

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