[llvm] [LoopInterchange] Add test for legality check missing latch condition (NFC) (PR #202725)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-aarch64-sve-vla` running on `linaro-g3-04` while building `llvm` at step 7 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/17/builds/16249

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

```
Step 7 (ninja check 1) failure: stage 1 checked (failure)
******************** TEST 'lld :: ELF/arm-thunk-linkerscript-large.s' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
/home/tcwg-buildbot/worker/clang-aarch64-sve-vla/stage1/bin/llvm-mc -arm-add-build-attributes -filetype=obj -triple=thumbv7a-none-linux-gnueabi /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/llvm/lld/test/ELF/arm-thunk-linkerscript-large.s -o /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/stage1/tools/lld/test/ELF/Output/arm-thunk-linkerscript-large.s.tmp
# executed command: /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/stage1/bin/llvm-mc -arm-add-build-attributes -filetype=obj -triple=thumbv7a-none-linux-gnueabi /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/llvm/lld/test/ELF/arm-thunk-linkerscript-large.s -o /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/stage1/tools/lld/test/ELF/Output/arm-thunk-linkerscript-large.s.tmp
# .---command stderr------------
# | error: Is a directory
# `-----------------------------
# error: command failed with exit status: 1

--

********************

Step 14 (test-suite) failure: test (failure)
******************** TEST 'test-suite :: Fortran/cray/f2023/12/11/write-after-endfile.test' FAILED ********************

/home/tcwg-buildbot/worker/clang-aarch64-sve-vla/test/sandbox/build/tools/timeit-target --timeout 7200 --limit-core 0 --limit-cpu 7200 --limit-file-size 209715200 --limit-rss-size 838860800 --append-exitstatus --redirect-output /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/test/sandbox/build/Fortran/cray/f2023/12/11/Output/write-after-endfile.test.out --redirect-input /dev/null --chdir /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/test/sandbox/build/Fortran/cray/f2023/12/11 --summary /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/test/sandbox/build/Fortran/cray/f2023/12/11/Output/write-after-endfile.test.time /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/test/sandbox/build/Fortran/cray/f2023/12/11/write-after-endfile
/home/tcwg-buildbot/worker/clang-aarch64-sve-vla/test/sandbox/build/tools/fpcmp-target /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/test/sandbox/build/Fortran/cray/f2023/12/11/Output/write-after-endfile.test.out /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/test/sandbox/build/Fortran/cray/f2023/12/11/write-after-endfile.reference_output

+ /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/test/sandbox/build/tools/fpcmp-target /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/test/sandbox/build/Fortran/cray/f2023/12/11/Output/write-after-endfile.test.out /home/tcwg-buildbot/worker/clang-aarch64-sve-vla/test/sandbox/build/Fortran/cray/f2023/12/11/write-after-endfile.reference_output
/home/tcwg-buildbot/worker/clang-aarch64-sve-vla/test/sandbox/build/tools/fpcmp-target: Comparison failed, textual difference between '
' and ' '

Input 1:

fatal Fortran runtime error(/home/tcwg-buildbot/worker/clang-aarch64-sve-vla/test/test-suite/Fortran/cray/f2023/12/11/write-after-endfile.f90:37): WRITE after ENDFILE
 k after OPEN: 45
 k after ENDFILE: 55
exit 134

Input 2:
 k after OPEN: 45
 k after ENDFILE: 55
 k after WRITE: 66
 PASS
exit 0

********************


```

</details>

https://github.com/llvm/llvm-project/pull/202725