llvm dev - Nov 2021 - 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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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: &nbsp;"llvm-dev"<llvm-dev at lists.llvm.org&gt;;
Date: &nbsp;Sat, Nov 13, 2021 02:54 AM
To: &nbsp;"llvm-dev"<llvm-dev at lists.llvm.org&gt;; 

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

&nbsp;

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

FunctionPass* lower = createLowerSwitchPass();
lower-&gt;runOnFunction(F);

The crash log says:&nbsp;Assertion failed: (Resolver &amp;&amp;
"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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