nikic wrote:

> We don't have a `isGuaranteedNotToBeUndef` only function, so that's the only 
> way. I would leave a fixme, since this call can be removed if we ever manage 
> to kill undef.

I actually added this function earlier today.

> @nikic is something like this the right fix?

I'd move the calls to isGuaranteedNotToBeUndef into 
haveNoCommonBitsSetSpecialCases, so you can check the correct values.


https://github.com/llvm/llvm-project/pull/72912
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