llvm dev - Sep 2021 - Manually Constructing LoopInfo via Dominator Tree

Hi,

I noticed one of the earlier posts 
(https://groups.google.com/g/llvm-dev/c/lVc2-0d2cRs/m/uwuOA_pXAgAJ) from 
llvm-dev that talked about "constructing loop info manually without any
pass"
by doing this:

              llvm::DominatorTree domTree{&func, func};
              llvm::LoopInfo loopInfo{&func, domTree};

However, when I try this in llvm 10.0, I get the following error:

  error: no matching function for call to 
‘llvm::DominatorTree::DominatorTree(<brace-enclosed initializer list>)’
              DominatorTree domTree{&F, F};


Am I doing something really silly here? or this manual hack no longer works?


Thanks,
Bodhi

DominatorTree has the following constructor:

  explicit DominatorTree(Function &F);

That is, use

    llvm::DominatorTree DT(func);

to instantiate it.

Michael


Am Mi., 15. Sept. 2021 um 13:26 Uhr schrieb via llvm-dev
<llvm-dev at lists.llvm.org>:
>
> Hi,
>
> I noticed one of the earlier posts
> (https://groups.google.com/g/llvm-dev/c/lVc2-0d2cRs/m/uwuOA_pXAgAJ) from
> llvm-dev that talked about "constructing loop info manually without
any pass"
> by doing this:
>
>               llvm::DominatorTree domTree{&func, func};
>               llvm::LoopInfo loopInfo{&func, domTree};
>
> However, when I try this in llvm 10.0, I get the following error:
>
>   error: no matching function for call to
> ‘llvm::DominatorTree::DominatorTree(<brace-enclosed initializer
list>)’
>               DominatorTree domTree{&F, F};
>
>
> Am I doing something really silly here? or this manual hack no longer
works?
>
>
> Thanks,
> Bodhi
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