[llvm] [VPlan] Support plain CFG plans in the verifier. (PR #181817)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-x86_64-linux-android` running on `sanitizer-buildbot-android` while building `llvm` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/186/builds/17991

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 2 (annotate) failure: 'python ../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py' (failure)
...
[       OK ] AddressSanitizer.StrArgsOverlapTest (2739 ms)
[ RUN      ] AddressSanitizer.StrtolOverflow
[       OK ] AddressSanitizer.StrtolOverflow (0 ms)
[ RUN      ] AddressSanitizer.CallocTest
[       OK ] AddressSanitizer.CallocTest (0 ms)
[ DISABLED ] AddressSanitizer.DISABLED_TSDTest
[ RUN      ] AddressSanitizer.UAF_Packed5
[       OK ] AddressSanitizer.UAF_Packed5 (492 ms)
[ RUN      ] AddressSanitizer.WildAddressTest
[       OK ] AddressSanitizer.WildAddressTest (239 ms)
[ RUN      ] AddressSanitizer.ManyThreadsTest
[       OK ] AddressSanitizer.ManyThreadsTest (218 ms)
[ RUN      ] AddressSanitizer.ZeroSizeMallocTest
[       OK ] AddressSanitizer.ZeroSizeMallocTest (0 ms)
[ RUN      ] AddressSanitizer.ManyStackObjectsTest
[       OK ] AddressSanitizer.ManyStackObjectsTest (232 ms)
[ RUN      ] AddressSanitizer.CxxExceptionTest
[       OK ] AddressSanitizer.CxxExceptionTest (0 ms)
[ DISABLED ] AddressSanitizer.DISABLED_MemIntrinsicUnalignedAccessTest
[ DISABLED ] AddressSanitizer.DISABLED_LargeFunctionSymbolizeTest
[ DISABLED ] AddressSanitizer.DISABLED_MallocFreeUnwindAndSymbolizeTest
[ RUN      ] AddressSanitizer.ShadowGapTest
[       OK ] AddressSanitizer.ShadowGapTest (246 ms)
[ RUN      ] AddressSanitizer.GlobalStringConstTest
[       OK ] AddressSanitizer.GlobalStringConstTest (227 ms)
[ RUN      ] AddressSanitizer.PthreadExitTest
[       OK ] AddressSanitizer.PthreadExitTest (255 ms)
[ DISABLED ] AddressSanitizer.DISABLED_StressStackReuseAndExceptionsTest
[ DISABLED ] AddressSanitizer.DISABLED_DemoThreadedTest
[ DISABLED ] AddressSanitizer.DISABLED_DemoStackTest
[ DISABLED ] AddressSanitizer.DISABLED_DemoThreadStackTest
[ DISABLED ] AddressSanitizer.DISABLED_DemoUAFLowIn
[ DISABLED ] AddressSanitizer.DISABLED_DemoUAFLowLeft
[ DISABLED ] AddressSanitizer.DISABLED_DemoUAFLowRight
[ DISABLED ] AddressSanitizer.DISABLED_DemoUAFHigh
[ DISABLED ] AddressSanitizer.DISABLED_DemoOOM
[ DISABLED ] AddressSanitizer.DISABLED_DemoDoubleFreeTest
[ DISABLED ] AddressSanitizer.DISABLED_DemoNullDerefTest
[ DISABLED ] AddressSanitizer.DISABLED_DemoFunctionStaticTest
[ DISABLED ] AddressSanitizer.DISABLED_DemoTooMuchMemoryTest
[ RUN      ] AddressSanitizer.BufferOverflowAfterManyFrees
[       OK ] AddressSanitizer.BufferOverflowAfterManyFrees (1907 ms)
[----------] 19 tests from AddressSanitizer (17219 ms total)

[----------] Global test environment tear-down
[==========] 23 tests from 3 test suites ran. (17223 ms total)
[  PASSED  ] 23 tests.

  YOU HAVE 12 DISABLED TESTS

Step 24 (run instrumented asan tests [aarch64/aosp_coral-userdebug/AOSP.MASTER]) failure: run instrumented asan tests [aarch64/aosp_coral-userdebug/AOSP.MASTER] (failure)
...
[ RUN      ] AddressSanitizerInterface.OverlappingPoisonMemoryRegionTest
[       OK ] AddressSanitizerInterface.OverlappingPoisonMemoryRegionTest (0 ms)
[ RUN      ] AddressSanitizerInterface.GlobalRedzones
[       OK ] AddressSanitizerInterface.GlobalRedzones (0 ms)
[ DISABLED ] AddressSanitizerInterface.DISABLED_StressLargeMemset
[ DISABLED ] AddressSanitizerInterface.DISABLED_StressSmallMemset
[ DISABLED ] AddressSanitizerInterface.DISABLED_InvalidPoisonAndUnpoisonCallsTest
[----------] 3 tests from AddressSanitizerInterface (0 ms total)

[----------] 1 test from AddressSanitizerInternalInterface
[ RUN      ] AddressSanitizerInternalInterface.SetShadow
[       OK ] AddressSanitizerInternalInterface.SetShadow (0 ms)
[----------] 1 test from AddressSanitizerInternalInterface (0 ms total)

[----------] 19 tests from AddressSanitizer
[ RUN      ] AddressSanitizer.LargeOOBInMemset
[       OK ] AddressSanitizer.LargeOOBInMemset (287 ms)
[ RUN      ] AddressSanitizer.BCmpOOBTest
[       OK ] AddressSanitizer.BCmpOOBTest (0 ms)
[ RUN      ] AddressSanitizer.OOB_int
[       OK ] AddressSanitizer.OOB_int (20520 ms)
[ DISABLED ] AddressSanitizer.DISABLED_DemoOOBLeftLow
[ DISABLED ] AddressSanitizer.DISABLED_DemoOOBLeftHigh
[ DISABLED ] AddressSanitizer.DISABLED_DemoOOBRightLow
[ DISABLED ] AddressSanitizer.DISABLED_DemoOOBRightHigh
[ RUN      ] AddressSanitizer.StrDupOOBTest
[       OK ] AddressSanitizer.StrDupOOBTest (1810 ms)
[ RUN      ] AddressSanitizer.StrChrAndIndexOOBTest
[       OK ] AddressSanitizer.StrChrAndIndexOOBTest (1856 ms)
[ RUN      ] AddressSanitizer.StrNCmpOOBTest
[       OK ] AddressSanitizer.StrNCmpOOBTest (3731 ms)
[ RUN      ] AddressSanitizer.StrArgsOverlapTest
[       OK ] AddressSanitizer.StrArgsOverlapTest (7371 ms)
[ RUN      ] AddressSanitizer.StrtolOverflow
[       OK ] AddressSanitizer.StrtolOverflow (0 ms)
[ RUN      ] AddressSanitizer.CallocTest
[       OK ] AddressSanitizer.CallocTest (0 ms)
[ DISABLED ] AddressSanitizer.DISABLED_TSDTest
[ RUN      ] AddressSanitizer.UAF_Packed5
[       OK ] AddressSanitizer.UAF_Packed5 (1219 ms)
[ RUN      ] AddressSanitizer.WildAddressTest
[       OK ] AddressSanitizer.WildAddressTest (605 ms)
[ RUN      ] AddressSanitizer.ManyThreadsTest

How to reproduce locally: https://github.com/google/sanitizers/wiki/SanitizerBotReproduceBuild




Serial 17031FQCB00176

```

</details>

https://github.com/llvm/llvm-project/pull/181817