[llvm] [ConstantFolding] Handle roundeven libcalls (PR #170692)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clangd-ubuntu-tsan` running on `clangd-ubuntu-clang` while building `llvm` at step 6 "test-build-clangd-clangd-index-server-clangd-in...".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/134/builds/30993

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

```
Step 6 (test-build-clangd-clangd-index-server-clangd-in...) failure: test (failure)
******************** TEST 'Clangd :: target_info.test' FAILED ********************
Exit Code: 66

Command Output (stdout):
--
# RUN: at line 5
rm -rf /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/Output/target_info.test.tmp.dir && mkdir -p /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/Output/target_info.test.tmp.dir
# executed command: rm -rf /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/Output/target_info.test.tmp.dir
# executed command: mkdir -p /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/Output/target_info.test.tmp.dir
# RUN: at line 7
echo '[{"directory": "/vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/Output/target_info.test.tmp.dir", "command": "/vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/Output/target_info.test.tmp.dir/armv7-clang -x c++ the-file.cpp -v", "file": "the-file.cpp"}]' > /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/Output/target_info.test.tmp.dir/compile_commands.json
# executed command: echo '[{"directory": "/vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/Output/target_info.test.tmp.dir", "command": "/vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/Output/target_info.test.tmp.dir/armv7-clang -x c++ the-file.cpp -v", "file": "the-file.cpp"}]'
# RUN: at line 9
sed -e "s|INPUT_DIR|/vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/Output/target_info.test.tmp.dir|g" /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/llvm-project/clang-tools-extra/clangd/test/target_info.test > /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/Output/target_info.test.tmp.test.1
# executed command: sed -e 's|INPUT_DIR|/vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/Output/target_info.test.tmp.dir|g' /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/llvm-project/clang-tools-extra/clangd/test/target_info.test
# RUN: at line 12
sed -E -e 's|"file://([A-Z]):/|"file:///\1:/|g' /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/Output/target_info.test.tmp.test.1 > /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/Output/target_info.test.tmp.test
# executed command: sed -E -e 's|"file://([A-Z]):/|"file:///\1:/|g' /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/Output/target_info.test.tmp.test.1
# RUN: at line 14
clangd -lit-test < /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/Output/target_info.test.tmp.test 2>&1 | /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/bin/FileCheck -strict-whitespace /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/Output/target_info.test.tmp.test
# executed command: clangd -lit-test
# note: command had no output on stdout or stderr
# error: command failed with exit status: 66
# executed command: /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/bin/FileCheck -strict-whitespace /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/Output/target_info.test.tmp.test

--

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


```

</details>

https://github.com/llvm/llvm-project/pull/170692