search for: postgenericschedul

...0:29 AM, Ehsan Amiri <ehsanamiri at gmail.com> wrote: > You can do this by changing instruction scheduling heuristics. I think the > more important question is if this correct always for all platforms. > > I don't know which scheduler you use. We use GenericScheduler and > PostGenericScheduler before and after RA. These classes have a > ::tryCandidate method which compares two instructions that can be legally > scheduled and decide which of the two should be scheduled. Currently these > method are target independent. > > The correctness question still remains open for me...

Hello. Is there a way to specify in the back end an (ISD::INLINEASM) SDNode to be scheduled first under all circumstances? I need to specify something like node priority to schedule the node before all other nodes in the SelectionDAG of the basic block. (Using chain or glue edges in order to make a node first is not a good idea, since I am doing this at instruction selection time, on

Hi to everyone, while working with the machine scheduler for a personal project, I came up with the necessity of inserting a backup boundary in the MachineSchedulerStrategy -- specifically, the PostGenericScheduler -- to hold a copy the scheduler's state, in order to implement a really trivial (and really inefficient) backtracking mechanism. This approach leads to a subtle "segmentation fault", when the pass ends and invokes the deleter. The reason of the fault is due to the custom deleter o...

I need to extract the cycle count for a single MachineBasicBlock (for MI would be also be great). I am trying to read this information from the Post-RA Scheduler. To do so, I tried modifying the PostGenericScheduler::schedNode and similar functions to get the scheduling results. The problem is that the scheduler creates specfic regions inside a MachineBasicBlock (as far as a know) and when interpreting the results from the scheduled regions I’m still missing the cycle count for some other MachineInstruction...