`reverse-iteration` tests fail in the CI

[firewave]

Although #106355 was fixed the tests still fail.

https://lab.llvm.org/buildbot/#/builders/110/builds/999

FAIL: LLVM::load.ll
FAIL: LLVM::full-cycle.ll

It turns out the other failures were masking previously introduced failures. They apparently started in https://lab.llvm.org/buildbot/#/builders/110/builds/728.

[nikic]

Presumably due to #102930 cc @mtrofin There is a loop printing unstable DenseMap FuncInfo.

[mtrofin]

Sorry - just saw this now, my notifications must have a problem. I'll fix it in a bit.

[firewave]

Green now: https://lab.llvm.org/buildbot/#/builders/110/builds/1114.

Thanks!