[clang] [compiler-rt] [llvm] [clang] builtins for atomicrmw fminmax/_num (PR #187139)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-gcc-ubuntu-no-asserts` running on `doug-worker-6` while building `clang` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/202/builds/7103

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

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'AddressSanitizer-Unit :: ./Asan-x86_64-calls-Test/9/25' FAILED ********************
Script(shard):
--
GTEST_OUTPUT=json:/home/buildbot/buildbot-root/gcc-no-asserts/build/runtimes/runtimes-bins/compiler-rt/lib/asan/tests/X86_64LinuxConfig/./Asan-x86_64-calls-Test-AddressSanitizer-Unit-2504546-9-25.json GTEST_SHUFFLE=0 GTEST_TOTAL_SHARDS=25 GTEST_SHARD_INDEX=9 /home/buildbot/buildbot-root/gcc-no-asserts/build/runtimes/runtimes-bins/compiler-rt/lib/asan/tests/X86_64LinuxConfig/./Asan-x86_64-calls-Test
--

Script:
--
/home/buildbot/buildbot-root/gcc-no-asserts/build/runtimes/runtimes-bins/compiler-rt/lib/asan/tests/X86_64LinuxConfig/./Asan-x86_64-calls-Test --gtest_filter=AddressSanitizer.ManyThreadsTest
--
/home/buildbot/buildbot-root/gcc-no-asserts/llvm-project/compiler-rt/lib/asan/tests/asan_test.cpp:379: Failure
Expected equality of these values:
  0
  pthread_create(&t[i], 0, ManyThreadsWorker, (void*)i)
    Which is: 11


/home/buildbot/buildbot-root/gcc-no-asserts/llvm-project/compiler-rt/lib/asan/tests/asan_test.cpp:379
Expected equality of these values:
  0
  pthread_create(&t[i], 0, ManyThreadsWorker, (void*)i)
    Which is: 11



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


```

</details>

https://github.com/llvm/llvm-project/pull/187139