[llvm-dev] how to add createLowerSwitchPass to PassManager object?

[Zhang via llvm-dev]

Hi:
As the message suggests, you'll need a PM for it.
Something like the following would do:


```
legacy::FunctionPassManager FPM(&M);;
FPM.add(createLowerSwitchPass());
FPM.run(Func)
```




Zhang
 
 
------------------ Original ------------------
From:  "llvm-dev"<llvm-dev at lists.llvm.org>;
Date:  Sat, Nov 13, 2021 02:54 AM
To:  "llvm-dev"<llvm-dev at lists.llvm.org>; 

Subject:  [llvm-dev] how to add createLowerSwitchPass to PassManager object?

 

My pass crashes on the callsite of runOnFunction() as it calls GetAnalysis to LazyValue internally.

FunctionPass* lower = createLowerSwitchPass();
lower->runOnFunction(F);

The crash log says: Assertion failed: (Resolver && "Pass has not been inserted into a PassManager object!")

How do I get the PassManager object to add LowerSwitchPass? I can't happen to find the object anywhere. Can the legacy pass manager run lower passes in llvm14? Alternatively, is there another method I can use to create LowerSwitchPass with the new PassManager?
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