mikaelholmen wrote:
I noticed that if I compile opt with UBSan enabled on this patch and then run
```
opt -passes=objc-arc-contract bbi-98007.ll -o /dev/null
```
we get an UBSan complaint like
```
../lib/Transforms/ObjCARC/ObjCARCContract.cpp:105:39: runtime error: load of
value 255, which is not a valid value for type 'bool'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
../lib/Transforms/ObjCARC/ObjCARCContract.cpp:105:39 in
```
And the bbi-98007.ll input is just
```
define void @a() {
entry:
ret void
}
```
https://github.com/llvm/llvm-project/pull/101114
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