[flang-commits] [flang] [flang] Fix IEEE_NEAREST_AFTER folding edge cases (PR #104846)

[LLVM Continuous Integration via flang-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ppc64le-flang-rhel-clang` running on `ppc64le-flang-rhel-test` while building `flang` at step 6 "test-build-unified-tree-check-flang".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/157/builds/5574

Here is the relevant piece of the build log for the reference:
```
Step 6 (test-build-unified-tree-check-flang) failure: test (failure)
******************** TEST 'Flang :: Evaluate/fold-nearest.f90' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
Not assuming libpgmath support

--
Command Output (stderr):
--
RUN: at line 1: "/home/buildbots/llvm-external-buildbots/workers/env/bin/python3.8" /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Evaluate/test_folding.py /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Evaluate/fold-nearest.f90 /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/bin/flang-new -fc1
+ /home/buildbots/llvm-external-buildbots/workers/env/bin/python3.8 /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Evaluate/test_folding.py /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Evaluate/fold-nearest.f90 /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/bin/flang-new -fc1
Traceback (most recent call last):
  File "/home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Evaluate/test_folding.py", line 94, in <module>
    proc = subprocess.run(
  File "/usr/lib64/python3.8/subprocess.py", line 516, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['/home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/bin/flang-new', '-fc1', '-fdebug-dump-symbols', '/home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Evaluate/fold-nearest.f90']' returned non-zero exit status 1.

--

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


```

https://github.com/llvm/llvm-project/pull/104846