Add a new X86_64 AVX512 Clang+LLVM builder + AVX512 worker

[aaron.ballman]

This looks sensible to me, but I leave it to @gkistanova for the final sign-off.

[yinyangsx]

hi @gkistanova, could you please review this patch?

[gkistanova]

LGTM.

buildbot/osuosl/master/config/builders.py

'factory' : ClangBuilder.getClangCMakeBuildFactory(
                         "-DLLVM_LIT_ARGS:STRING=-v",
                         "-DLLVM_ENABLE_LIBCXX:BOOL=ON",
                         "-DWITH_POLLY:BOOL=OFF",
                         "-DLINK_POLLY_INTO_TOOLS:BOOL=OFF",
                         "-DPOLLY_BUILD_SHARED_LIB:BOOL=OFF",
                         "-DCMAKE_C_COMPILER:FILEPATH=/local/clang+llvm-12.0.0-x86_64-linux-gnu-ubuntu-16.04/bin/clang",
                         "-DCMAKE_CXX_COMPILER:FILEPATH=/local/clang+llvm-12.0.0-x86_64-linux-gnu-ubuntu-16.04/bin/clang++"])},
 
+    ## X86_64 AVX512 Clang+LLVM check-all + test-suite
+    {'name' : "clang-cmake-x86_64-avx512-linux",
+    'tags'  : ["clang"],
+    'workernames' : ["avx512-intel64"],
+    'builddir': "clang-cmake-x86_64-avx512-linux",
+    'factory' : ClangBuilder.getClangCMakeBuildFactory(
+                    clean=False,
+                    checkout_clang_tools_extra=False,
+                    checkout_compiler_rt=False,
+                    checkout_lld=False,
+                    useTwoStage=False,
+                    runTestSuite=True,
+                    testsuite_flags=['--cflag', '-march=cascadelake', '--threads=32', '--build-threads=32'],
+                    env={'PATH':'/usr/bin/ccache:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'},
+                    extra_cmake_args=[
+                        "-DLLVM_ENABLE_ASSERTIONS=ON",
+                        "-DCMAKE_C_FLAGS='-march=cascadelake'",
+                        "-DCMAKE_CXX_FLAGS='-march=cascadelake'",
+                        "-DLLVM_TARGETS_TO_BUILD='X86'"])},
+
     ## X86_64 AVX2 LNT test-suite in Benchmark mode
     {'name' : "clang-cmake-x86_64-avx2-linux-perf",
     'tags'  : ["clang"],
     'workernames' : ["avx2-intel64"],
     'builddir': "clang-cmake-x86_64-avx2-linux-perf",
     'factory' : ClangBuilder.getClangCMakeBuildFactory(
                     clean=False,
                     checkout_clang_tools_extra=False,

buildbot/osuosl/master/config/workers.py

return [
         create_worker("cuda-t4-0", max_builds=1),
 
         # HIP on Ubuntu 18.04.5,  Intel(R) Xeon(R) Gold 5218 @ 2.30GHz, Vega20 GPU
         create_worker("hip-vega20-0", max_builds=1),
 
         # X86_64 AVX2, Ubuntu 16.04.2, Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz
         create_worker("avx2-intel64", properties={'jobs': 80}, max_builds=1),
 
+        # X86_64 AVX512, Ubuntu 22.04.1 LTS, Intel(R) Xeon(R) Silver 4216 CPU @ 2.10GHz
+        create_worker("avx512-intel64", properties={'jobs': 80}, max_builds=1),
+
         # Debian 9.0 x86_64 64-core GCE instances
         create_worker("fuchsia-debian-64-us-central1-a-1", properties={'jobs': 64}, max_builds=1),
         create_worker("fuchsia-debian-64-us-central1-b-1", properties={'jobs': 64}, max_builds=1),
 
         # Debian x86_64 Buster Xeon(R) Gold 6154 CPU @ 3.00GHz, 192GB RAM
         create_worker("lldb-x86_64-debian", properties={'jobs': 72}, max_builds=1),
 
         # Windows x86_64 32 CPUs, 125 GB RAM