Displaying 6 results from an estimated 6 matches for "oldmbb".
2014 Jan 03
2
[LLVMdev] How to update LiveInterval information of newly inserted machine basic block
...shown following:
>> LiveIntervals *LIS = &getAnalysis<LiveIntervals>();
>> 1. LIS->insertMBBInMaps(NewMBB)
>> 2. LIS->InsertMachineInstrRangeInMaps(NewMBB->begin(), NewMBB->end())
>> 3. Due to some machine instructions of NewMBB copy from OldMBB, I have to removeInterval firstly. Then I use LIS->createAndComputeVirtRegInterval() to update LiveInterval info of NewMBB.
>> 4. Then I want to delete OldMBB in the current MachineFuncion. At the same time, delete LiveIntervals info of OldMBB. So, firstly, Use RemoveMachineInstrFromMa...
2014 Jan 03
2
[LLVMdev] How to update LiveInterval information of newly inserted machine basic block
...you are right.
My update steps are shown following:
LiveIntervals *LIS = &getAnalysis<LiveIntervals>();
1. LIS->insertMBBInMaps(NewMBB)
2. LIS->InsertMachineInstrRangeInMaps(NewMBB->begin(), NewMBB->end())
3. Due to some machine instructions of NewMBB copy from OldMBB, I have to removeInterval firstly. Then I use LIS->createAndComputeVirtRegInterval() to update LiveInterval info of NewMBB.
4. Then I want to delete OldMBB in the current MachineFuncion. At the same time, delete LiveIntervals info of OldMBB. So, firstly, Use RemoveMachineInstrFromMaps() to e...
2014 Jan 03
2
[LLVMdev] How to update LiveInterval information of newly inserted machine basic block
...t; LiveIntervals *LIS = &getAnalysis<LiveIntervals>();
>>>> 1. LIS->insertMBBInMaps(NewMBB)
>>>> 2. LIS->InsertMachineInstrRangeInMaps(NewMBB->begin(), NewMBB->end())
>>>> 3. Due to some machine instructions of NewMBB copy from OldMBB, I have to removeInterval firstly. Then I use LIS->createAndComputeVirtRegInterval() to update LiveInterval info of NewMBB.
>>>> 4. Then I want to delete OldMBB in the current MachineFuncion. At the same time, delete LiveIntervals info of OldMBB. So, firstly, Use RemoveMachineIns...
2013 Dec 31
2
[LLVMdev] How to update LiveInterval information of newly inserted machine basic block
Hi,
I insert a new machine basic block(MBB) before Greedy Register Allocation, after Simple Register Coalescing. But I encounter a fatal
error "regalloc = ... not currently supported with -O0". I use command line with opt level O2, not O0.
The probable reason of this error is that no LiveInterval information for newly MBB which is used by Register Allocation.
And, LiveIntervals depend
2014 Jan 04
2
[LLVMdev] How to update LiveInterval information of newly inserted machine basic block
...ould think so.
>
> /jakob
>
>
> Thank you very much for your talk.
> I think I could append more information about updating LiveIntervals.
> 1. It works well if I just use from step1 to step3, without step4.
> 2. In step4, I firstly use UnreachableBlockElim pass to delete OldMBB.
> Then, remove all intervals and recompute all the virtual registers' LiveIntervals.
> 3. I debug source code in LiveRangeCalc.cpp and copy partial code shown following.
> /// LiveRangeCalc.cpp
> ...
> #ifndef NDEBUG
> if (MBB->pred_empty()) {
> MBB->getPar...
2014 Jan 03
2
[LLVMdev] How to update LiveInterval information of newly inserted machine basic block
On Jan 3, 2014, at 1:52 PM, Andrew Trick <atrick at apple.com> wrote:
> He really just wants to rerun LiveIntervals analysis, but LiveVariables is no longer available. Would it work just to clear all the intervals rerun LiveIntervals::computeVirtRegs after all the CFG transforms are complete?
Yes, I should think so.
/jakob
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