[zorg] Fix test-suite regression on arm bots

[zatrazz]

Summary

Most of the arm bots that run the test-suite are showing a failure
due the https://bugs.llvm.org/show_bug.cgi?id=49143. This patch
adds -O3 to avoid the issue for now.

[ostannard]

I think it would be better to disable (or change the CFLAGS for, is possible) the one test (is this the same one discussed in D96490?), than to change the config of the whole test suite.

buildbot/osuosl/master/config/builders.py

# Clang builders.
     'factory' : ClangBuilder.getClangCMakeBuildFactory(
                     clean=False,
                     checkout_compiler_rt=False,
                     checkout_lld=False,
                     test=False,
                     useTwoStage=False,
                     runTestSuite=True,
                     testsuite_flags=[
-                        '--cppflags', '-mcpu=cortex-a15 -marm',
+                        '--cppflags', '-O3 -mcpu=cortex-a15 -marm',
                         '--threads=32', '--build-threads=32'],
                     extra_cmake_args=["-DLLVM_TARGETS_TO_BUILD='ARM'"])},
 
     ## ARMv7 check-all self-host NEON with CMake builder
     {'name' : "clang-cmake-armv7-selfhost-neon",
     'tags'  : ["clang"],
     'workernames': ["linaro-armv7-selfhost"],
     'builddir':"clang-cmake-armv7-selfhost-neon",
# Clang builders.
     'factory' : ClangBuilder.getClangCMakeBuildFactory(
                     clean=False,
                     checkout_compiler_rt=False,
                     checkout_lld=False,
                     test=True,
                     useTwoStage=False,
                     runTestSuite=True,
                     testsuite_flags=[
-                        '--cppflags', '-mcpu=cortex-a57',
+                        '--cppflags', '-O3 -mcpu=cortex-a57',
                         '--threads=32', '--build-threads=32'],
                     extra_cmake_args=["-DLLVM_TARGETS_TO_BUILD='ARM;AArch64'"])},
 
     ## AArch64 Self-hosting Clang+LLVM check-all + LLD + test-suite
     {'name' : "clang-cmake-aarch64-lld",
     'tags'  : ["lld"],
     'workernames' : ["linaro-aarch64-lld"],
     'builddir':"clang-cmake-aarch64-lld",
     'factory' : ClangBuilder.getClangCMakeBuildFactory(
                 clean=False,
                 checkout_compiler_rt=True,
                 checkout_lld=True,
                 test=True,
                 useTwoStage=True,
                 runTestSuite=True,
                 testsuite_flags=[
-                    '--cppflags', '-mcpu=cortex-a57 -fuse-ld=lld',
+                    '--cppflags', '-O3 -mcpu=cortex-a57 -fuse-ld=lld',
                     '--threads=32', '--build-threads=32'],
                 extra_cmake_args=[
                     "-DCMAKE_C_FLAGS='-mcpu=cortex-a57'",
                     "-DCMAKE_CXX_FLAGS='-mcpu=cortex-a57'",
                     "-DLLVM_TARGETS_TO_BUILD='ARM;AArch64'",
                     "-DLLVM_ENABLE_LLD=True"])},
 
     ## AArch64 Clang+LLVM run test-suite at -O0 (GlobalISel is now default).
# Clang builders.
     'factory' : ClangBuilder.getClangCMakeBuildFactory(
                     clean=False,
                     checkout_lld=False,
                     checkout_compiler_rt=True,
                     testStage1=False,
                     useTwoStage=True,
                     runTestSuite=True,
                     testsuite_flags=[
-                        '--cppflags', '-mcpu=cortex-a15 -mfpu=vfpv3 -marm',
+                        '--cppflags', '-O3 -mcpu=cortex-a15 -mfpu=vfpv3 -marm',
                         '--threads=4', '--build-threads=4'],
                     extra_cmake_args=[
                         "-DCOMPILER_RT_TEST_COMPILER_CFLAGS='-mcpu=cortex-a15 -mfpu=vfpv3 -marm'",
                         "-DLLVM_TARGETS_TO_BUILD='ARM'",
                         "-DLLVM_PARALLEL_LINK_JOBS=2"])},
 
     ## ARMv7 Thumb2 with neon; check-all 2-stage full compiler-rt + testsuite
     {'name' : "clang-cmake-thumbv7-full-sh",
     'tags'  : ["clang"],
     'workernames' : ["linaro-tk1-01", "linaro-tk1-03", "linaro-tk1-04", "linaro-tk1-05"],
     'builddir': "clang-cmake-thumbv7-full-sh",
     'factory' : ClangBuilder.getClangCMakeBuildFactory(
                     clean=False,
                     checkout_lld=False,
                     checkout_compiler_rt=True,
                     testStage1=False,
                     useTwoStage=True,
                     runTestSuite=True,
                     testsuite_flags=[
-                        '--cppflags', '-mcpu=cortex-a15 -mthumb',
+                        '--cppflags', '-O3 -mcpu=cortex-a15 -mthumb',
                         '--threads=4', '--build-threads=4'],
                     extra_cmake_args=[
                         "-DCMAKE_C_FLAGS='-mcpu=cortex-a15 -mthumb'",
                         "-DCMAKE_CXX_FLAGS='-mcpu=cortex-a15 -mthumb'",
                         "-DCOMPILER_RT_TEST_COMPILER_CFLAGS='-mcpu=cortex-a15 -mthumb'",
                         "-DLLVM_TARGETS_TO_BUILD='ARM'",
                         "-DLLVM_PARALLEL_LINK_JOBS=2"])},
 
     ## AArch32 Self-hosting Clang+LLVM check-all + LLD + test-suite
     # Sanitizers build disabled due to PR38690
     {'name' : "clang-cmake-armv8-lld",
     'tags'  : ["lld"],
     'workernames' : ["linaro-armv8-lld"],
     'builddir': "clang-cmake-armv8-lld",
     'factory' : ClangBuilder.getClangCMakeBuildFactory(
                     clean=False,
                     checkout_compiler_rt=True,
                     checkout_lld=True,
                     test=True,
                     useTwoStage=True,
                     runTestSuite=True,
                     testsuite_flags=[
-                        '--cppflags', '-mcpu=cortex-a57 -fuse-ld=lld',
+                        '--cppflags', '-O3 -mcpu=cortex-a57 -fuse-ld=lld',
                         '--threads=32', '--build-threads=32'],
                     extra_cmake_args=[
                         "-DCMAKE_C_FLAGS='-mcpu=cortex-a57'",
                         "-DCMAKE_CXX_FLAGS='-mcpu=cortex-a57'",
                         "-DLLVM_TARGETS_TO_BUILD='ARM;AArch64'",
                         "-DCOMPILER_RT_BUILD_SANITIZERS=OFF",
                         "-DLLVM_ENABLE_LLD=True"])},
 
     # AArch64 Clang+LLVM+RT check-all + flang + test-suite + self-hosting
     {'name' : "clang-cmake-aarch64-full",
     'tags'  : ["clang"],
     'workernames' : ["linaro-aarch64-full"],
     'builddir': "clang-cmake-aarch64-full",
     'factory' : ClangBuilder.getClangCMakeBuildFactory(
                     clean=False,
                     checkout_compiler_rt=True,
                     checkout_flang=True,
                     checkout_lld=False,
                     test=True,
                     useTwoStage=True,
                     testStage1=False,
                     runTestSuite=True,
                     testsuite_flags=[
-                        '--cppflags', '-mcpu=cortex-a57',
+                        '--cppflags', '-O3 -mcpu=cortex-a57',
                         '--threads=32', '--build-threads=32'],
                     extra_cmake_args=[
                         "-DCMAKE_C_FLAGS='-mcpu=cortex-a57'",
                         "-DCMAKE_CXX_FLAGS='-mcpu=cortex-a57'",
                         "-DLLVM_TARGETS_TO_BUILD='ARM;AArch64'"])},
 
     {'name' : "clang-arm64-windows-msvc-2stage",
     'tags'  : ["clang"],