llvm dev - Nov 2015 - get basic blocks inside a machine code loop

Hello everyone,
I am trying to write a pass which works on machine instructions. I need to
get all basic blocks in the loop. I could't find any function like
getblocks for machineloop.
I wrote my code like this:

MachineLoopInfo &MLI = getAnalysis<MachineLoopInfo>();
for (MachineLoopInfo::iterator i = MLI.begin(), e = MLI.end(); i != e; ++i)
{
MachineLoop *ML = *i;
int bbCounter = 0;
loopCounter++;
for(MachineLoop::iterator mbb = ML->begin(); mbb != ML->end(); ++mbb) {
bbCounter+=1;
}
  errs() <<"bbcounter" << bbCounter <<
"\n";
}
errs() << "loopCounter" << loopCounter <<
"\n";

I used loopcounter and bbcounter to identify if my pass is working
correctly. I run this pass on my test code which has 1 loop with 4 basic
blocks. It returns 1 for loopcounter, but the bbcounter is 0.
It means that my iterator on machineloop does not work. I appreciate any
help with this problem.
Thanks,
Fami
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On 11/23/2015 2:29 PM, fateme Hoseini via llvm-dev
wrote:
> Hello everyone,
> I am trying to write a pass which works on machine instructions. I need
> to get all basic blocks in the loop. I could't find any function like
> getblocks for machineloop.
MachineLoop is a subclass of LoopBase, which is a template and defines 
getBlocks for the specified block type.

-Krzysztof


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