llvm dev - Nov 2010 - [LLVMdev] problem with llvm reverse iterator

Hi,

I am writing an llvm pass wherein I require to iterate MachineBasicBlocks in
reverse. The ilist reverse_iterator is not functioning as expected. Nor is
the ilist iterator working
in reverse (although -- operator is overloaded to do so).

for (MachineFunction::iterator MBBI = mf_->end(), E = mf_->begin();MBBI
!E; --MBBI)
    {
        MachineBasicBlock *MBB = MBBI;
        DEBUG(dbgs()<<*MBB<<"\n");
    }

Any suggestion would be helpful.

Thanks.
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Hi,

You should write sth like this:
for (MachineFunction::iterator MBBI = mf_->end(), E = mf_->begin();MBBI
!E; ) {
  MachineBasicBlock *MBB = --MBBI;
  DEBUG(dbgs()<<*MBB<<"\n");
}

Regads
-- 
Jakub Staszak

On Sat, Nov 13, 2010 at 2:09 PM, Deepanjana Deb
<deepanjana.deb at gmail.com> wrote:
> Hi,
>
> I am writing an llvm pass wherein I require to iterate MachineBasicBlocks
in
> reverse. The ilist reverse_iterator is not functioning as expected. Nor is
> the ilist iterator working
> in reverse (although -- operator is overloaded to do so).
>
> for (MachineFunction::iterator MBBI = mf_->end(), E =
mf_->begin();MBBI !> E; --MBBI)
>     {
>         MachineBasicBlock *MBB = MBBI;
>         DEBUG(dbgs()<<*MBB<<"\n");
>     }
>
> Any suggestion would be helpful.
>
> Thanks.
>
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