[clang] [compiler-rt] [llvm] [SystemZ] Add support for half (fp16) (PR #109164)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-x86_64-linux-android` running on `sanitizer-buildbot-android` while building `clang,compiler-rt,llvm` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/186/builds/8262

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

```
Step 2 (annotate) failure: 'python ../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py' (failure)
...
[2028/5493] Building CXX object lib/ExecutionEngine/RuntimeDyld/CMakeFiles/LLVMRuntimeDyld.dir/RuntimeDyldCOFF.cpp.o
[2029/5493] Building CXX object lib/ExecutionEngine/RuntimeDyld/CMakeFiles/LLVMRuntimeDyld.dir/RuntimeDyldELF.cpp.o
[2030/5493] Building CXX object lib/ExecutionEngine/RuntimeDyld/CMakeFiles/LLVMRuntimeDyld.dir/RuntimeDyldMachO.cpp.o
[2031/5493] Building CXX object lib/ExecutionEngine/RuntimeDyld/CMakeFiles/LLVMRuntimeDyld.dir/Targets/RuntimeDyldELFMips.cpp.o
[2032/5493] Building CXX object lib/Target/CMakeFiles/LLVMTarget.dir/Target.cpp.o
[2033/5493] Building CXX object lib/Target/CMakeFiles/LLVMTarget.dir/TargetMachine.cpp.o
[2034/5493] Building CXX object lib/Target/CMakeFiles/LLVMTarget.dir/TargetLoweringObjectFile.cpp.o
[2035/5493] Building CXX object lib/Target/CMakeFiles/LLVMTarget.dir/TargetMachineC.cpp.o
[2036/5493] Building AArch64GenSubtargetInfo.inc...
[2037/5493] Building CXX object lib/CodeGen/SelectionDAG/CMakeFiles/LLVMSelectionDAG.dir/LegalizeDAG.cpp.o
FAILED: lib/CodeGen/SelectionDAG/CMakeFiles/LLVMSelectionDAG.dir/LegalizeDAG.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes /usr/bin/ccache /var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm_build0/bin/clang++ -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm_build64/lib/CodeGen/SelectionDAG -I/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/llvm/lib/CodeGen/SelectionDAG -I/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm_build64/include -I/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT lib/CodeGen/SelectionDAG/CMakeFiles/LLVMSelectionDAG.dir/LegalizeDAG.cpp.o -MF lib/CodeGen/SelectionDAG/CMakeFiles/LLVMSelectionDAG.dir/LegalizeDAG.cpp.o.d -o lib/CodeGen/SelectionDAG/CMakeFiles/LLVMSelectionDAG.dir/LegalizeDAG.cpp.o -c /var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:5471:3: error: unannotated fall-through between switch labels [-Werror,-Wimplicit-fallthrough]
 5471 |   case ISD::STRICT_FMAXIMUM:
      |   ^
/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:5471:3: note: insert 'LLVM_FALLTHROUGH;' to silence this warning
 5471 |   case ISD::STRICT_FMAXIMUM:
      |   ^
      |   LLVM_FALLTHROUGH; 
/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:5471:3: note: insert 'break;' to avoid fall-through
 5471 |   case ISD::STRICT_FMAXIMUM:
      |   ^
      |   break; 
1 error generated.
[2038/5493] Building AArch64GenInstrInfo.inc...
[2039/5493] Building AMDGPUGenCallingConv.inc...
[2040/5493] Building CXX object lib/MC/MCParser/CMakeFiles/LLVMMCParser.dir/AsmParser.cpp.o
[2041/5493] Building AMDGPUGenMCCodeEmitter.inc...
[2042/5493] Building AMDGPUGenDisassemblerTables.inc...
[2043/5493] Building AMDGPUGenAsmWriter.inc...
[2044/5493] Building AMDGPUGenAsmMatcher.inc...
[2045/5493] Building AMDGPUGenGlobalISel.inc...
[2046/5493] Building AMDGPUGenMCPseudoLowering.inc...
[2047/5493] Building AMDGPUGenDAGISel.inc...
[2048/5493] Building AMDGPUGenPostLegalizeGICombiner.inc...
[2049/5493] Building AMDGPUGenInstrInfo.inc...
[2050/5493] Building AMDGPUGenPreLegalizeGICombiner.inc...
ninja: build stopped: subcommand failed.

How to reproduce locally: https://github.com/google/sanitizers/wiki/SanitizerBotReproduceBuild


@@@STEP_FAILURE@@@

@@@STEP_FAILURE@@@

@@@STEP_FAILURE@@@
Step 8 (bootstrap clang) failure: bootstrap clang (failure)
...
[2028/5493] Building CXX object lib/ExecutionEngine/RuntimeDyld/CMakeFiles/LLVMRuntimeDyld.dir/RuntimeDyldCOFF.cpp.o
[2029/5493] Building CXX object lib/ExecutionEngine/RuntimeDyld/CMakeFiles/LLVMRuntimeDyld.dir/RuntimeDyldELF.cpp.o
[2030/5493] Building CXX object lib/ExecutionEngine/RuntimeDyld/CMakeFiles/LLVMRuntimeDyld.dir/RuntimeDyldMachO.cpp.o
[2031/5493] Building CXX object lib/ExecutionEngine/RuntimeDyld/CMakeFiles/LLVMRuntimeDyld.dir/Targets/RuntimeDyldELFMips.cpp.o
[2032/5493] Building CXX object lib/Target/CMakeFiles/LLVMTarget.dir/Target.cpp.o
[2033/5493] Building CXX object lib/Target/CMakeFiles/LLVMTarget.dir/TargetMachine.cpp.o
[2034/5493] Building CXX object lib/Target/CMakeFiles/LLVMTarget.dir/TargetLoweringObjectFile.cpp.o
[2035/5493] Building CXX object lib/Target/CMakeFiles/LLVMTarget.dir/TargetMachineC.cpp.o
[2036/5493] Building AArch64GenSubtargetInfo.inc...
[2037/5493] Building CXX object lib/CodeGen/SelectionDAG/CMakeFiles/LLVMSelectionDAG.dir/LegalizeDAG.cpp.o
FAILED: lib/CodeGen/SelectionDAG/CMakeFiles/LLVMSelectionDAG.dir/LegalizeDAG.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes /usr/bin/ccache /var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm_build0/bin/clang++ -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm_build64/lib/CodeGen/SelectionDAG -I/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/llvm/lib/CodeGen/SelectionDAG -I/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm_build64/include -I/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT lib/CodeGen/SelectionDAG/CMakeFiles/LLVMSelectionDAG.dir/LegalizeDAG.cpp.o -MF lib/CodeGen/SelectionDAG/CMakeFiles/LLVMSelectionDAG.dir/LegalizeDAG.cpp.o.d -o lib/CodeGen/SelectionDAG/CMakeFiles/LLVMSelectionDAG.dir/LegalizeDAG.cpp.o -c /var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:5471:3: error: unannotated fall-through between switch labels [-Werror,-Wimplicit-fallthrough]
 5471 |   case ISD::STRICT_FMAXIMUM:
      |   ^
/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:5471:3: note: insert 'LLVM_FALLTHROUGH;' to silence this warning
 5471 |   case ISD::STRICT_FMAXIMUM:
      |   ^
      |   LLVM_FALLTHROUGH; 
/var/lib/buildbot/sanitizer-buildbot6/sanitizer-x86_64-linux-android/build/llvm-project/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:5471:3: note: insert 'break;' to avoid fall-through
 5471 |   case ISD::STRICT_FMAXIMUM:
      |   ^
      |   break; 
1 error generated.
[2038/5493] Building AArch64GenInstrInfo.inc...
[2039/5493] Building AMDGPUGenCallingConv.inc...
[2040/5493] Building CXX object lib/MC/MCParser/CMakeFiles/LLVMMCParser.dir/AsmParser.cpp.o
[2041/5493] Building AMDGPUGenMCCodeEmitter.inc...
[2042/5493] Building AMDGPUGenDisassemblerTables.inc...
[2043/5493] Building AMDGPUGenAsmWriter.inc...
[2044/5493] Building AMDGPUGenAsmMatcher.inc...
[2045/5493] Building AMDGPUGenGlobalISel.inc...
[2046/5493] Building AMDGPUGenMCPseudoLowering.inc...
[2047/5493] Building AMDGPUGenDAGISel.inc...
[2048/5493] Building AMDGPUGenPostLegalizeGICombiner.inc...
[2049/5493] Building AMDGPUGenInstrInfo.inc...
[2050/5493] Building AMDGPUGenPreLegalizeGICombiner.inc...
ninja: build stopped: subcommand failed.

How to reproduce locally: https://github.com/google/sanitizers/wiki/SanitizerBotReproduceBuild




program finished with exit code 2
elapsedTime=90.762997

```

</details>

https://github.com/llvm/llvm-project/pull/109164