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2018 Feb 19
0
[Newbie question] Extracting execution cycles from basic blocks
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 MachineInstructions belonging...
2013 Jun 03
0
[LLVMdev] Rematerialization and spilling
On Jun 3, 2013, at 9:42 AM, Steve Montgomery <stephen.montgomery3 at btinternet.com> wrote: > Hi Jakob, > > thanks for the advice. I'll do as you suggest and make sure that CCR is never live. > > I can use pseudo-instructions to bundle cmp+jump but it's not ideal because I might also have to bundle cmp+jump+jump+... into a pseudo. Also, there are several flavours of
2013 Jun 03
4
[LLVMdev] Rematerialization and spilling
Hi Jakob, thanks for the advice. I'll do as you suggest and make sure that CCR is never live. I can use pseudo-instructions to bundle cmp+jump but it's not ideal because I might also have to bundle cmp+jump+jump+... into a pseudo. Also, there are several flavours of cmp instruction so I might need a lot of pseudos. That's what led me to wonder whether MachineInstrBundles might be a