https://github.com/nikic commented:
The test says:
```llvm
; Don't crash processing degenerate metadata.
define void @or_icmps_empty_metadata(i32 %x, i32 %y, ptr %p) {
```
So I believe the intention here is specifically to test this degenerate
situation of 0, 0 branch weights.
Possibly these should be rejected by the verifier? If that were the case, there
would be no need to test them here.
https://github.com/llvm/llvm-project/pull/160629
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