[llvm] [llvm-calc-occupancy] Add an AMDGPU occupancy calculator tool (PR #208727)

Thu Jul 30 07:27:10 PDT 2026

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-ppc64le-rhel` running on `ppc64le-clang-rhel-test` while building `llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/145/builds/173

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

```
Step 5 (build-unified-tree) failure: build (failure)
...
705.105 [315/192/6549] Building CXX object tools/clang/tools/libclang/CMakeFiles/libclang.dir/CIndexCodeCompletion.cpp.o
705.158 [314/192/6550] Building CXX object tools/llvm-pdbutil/CMakeFiles/llvm-pdbutil.dir/PrettyClassLayoutGraphicalDumper.cpp.o
705.186 [313/192/6551] Building CXX object tools/llvm-pdbutil/CMakeFiles/llvm-pdbutil.dir/PrettyEnumDumper.cpp.o
705.224 [312/192/6552] Building CXX object tools/llvm-pdbutil/CMakeFiles/llvm-pdbutil.dir/PrettyClassDefinitionDumper.cpp.o
705.287 [311/192/6553] Building CXX object tools/llvm-isel-fuzzer/CMakeFiles/llvm-isel-fuzzer.dir/llvm-isel-fuzzer.cpp.o
705.304 [310/192/6554] Building CXX object tools/llvm-mca/CMakeFiles/llvm-mca.dir/Views/InstructionInfoView.cpp.o
705.404 [309/192/6555] Building CXX object tools/llvm-pdbutil/CMakeFiles/llvm-pdbutil.dir/PrettyCompilandDumper.cpp.o
705.494 [308/192/6556] Building CXX object tools/llvm-mca/CMakeFiles/llvm-mca.dir/Views/BottleneckAnalysis.cpp.o
705.705 [307/192/6557] Building CXX object tools/llvm-exegesis/lib/Mips/CMakeFiles/obj.LLVMExegesisMips.dir/Target.cpp.o
706.205 [306/192/6558] Building CXX object tools/llvm-calc-occupancy/CMakeFiles/llvm-calc-occupancy.dir/llvm-calc-occupancy.cpp.o
FAILED: [code=1] tools/llvm-calc-occupancy/CMakeFiles/llvm-calc-occupancy.dir/llvm-calc-occupancy.cpp.o 
ccache /home/buildbots/llvm-external-buildbots/clang.20.1.8/bin/clang++ --gcc-toolchain=/gcc-toolchain/usr -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GLIBCXX_USE_CXX11_ABI=1 -D_GNU_SOURCE -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/build/tools/llvm-calc-occupancy -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/llvm/tools/llvm-calc-occupancy -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/build/include -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/llvm/include -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/llvm/lib/Target/AMDGPU -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/build/lib/Target/AMDGPU -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 -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Xclang -fno-pch-timestamp -O3 -DNDEBUG -std=c++17 -UNDEBUG -fno-exceptions -funwind-tables -fno-rtti -Winvalid-pch -Xclang -include-pch -Xclang /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/build/lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/cmake_pch.hxx.pch -Xclang -include -Xclang /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/build/lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/cmake_pch.hxx -MD -MT tools/llvm-calc-occupancy/CMakeFiles/llvm-calc-occupancy.dir/llvm-calc-occupancy.cpp.o -MF tools/llvm-calc-occupancy/CMakeFiles/llvm-calc-occupancy.dir/llvm-calc-occupancy.cpp.o.d -o tools/llvm-calc-occupancy/CMakeFiles/llvm-calc-occupancy.dir/llvm-calc-occupancy.cpp.o -c /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/llvm/tools/llvm-calc-occupancy/llvm-calc-occupancy.cpp
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/llvm/tools/llvm-calc-occupancy/llvm-calc-occupancy.cpp:229:41: error: no member named 'getAddressableNumSGPRs' in namespace 'llvm::AMDGPU::IsaInfo'; did you mean 'getAddressableNumArchVGPRs'?
  229 |   unsigned AddrSGPRs = AMDGPU::IsaInfo::getAddressableNumSGPRs(STI);
      |                        ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
      |                                         getAddressableNumArchVGPRs
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.h:278:10: note: 'getAddressableNumArchVGPRs' declared here
  278 | unsigned getAddressableNumArchVGPRs(const MCSubtargetInfo &STI);
      |          ^
1 error generated.
706.213 [306/191/6559] Building CXX object tools/llvm-cgdata/CMakeFiles/llvm-cgdata.dir/llvm-cgdata.cpp.o
706.558 [306/190/6560] Building CXX object tools/llvm-mc/CMakeFiles/llvm-mc.dir/Disassembler.cpp.o
706.593 [306/189/6561] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/SourceCode.cpp.o
706.702 [306/188/6562] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/GlobalCompilationDatabase.cpp.o
706.746 [306/187/6563] Building CXX object tools/clang/lib/Interpreter/CMakeFiles/obj.clangInterpreter.dir/IncrementalParser.cpp.o
706.748 [306/186/6564] Building CXX object tools/llvm-pdbutil/CMakeFiles/llvm-pdbutil.dir/PrettyVariableDumper.cpp.o
706.763 [306/185/6565] Building CXX object tools/clang/tools/extra/modularize/CMakeFiles/modularize.dir/PreprocessorTracker.cpp.o
707.024 [306/184/6566] Building CXX object tools/clang/lib/Interpreter/CMakeFiles/obj.clangInterpreter.dir/CodeCompletion.cpp.o
707.119 [306/183/6567] Building CXX object tools/llvm-pdbutil/CMakeFiles/llvm-pdbutil.dir/PrettyFunctionDumper.cpp.o
707.122 [306/182/6568] Building CXX object tools/llvm-offload-wrapper/CMakeFiles/llvm-offload-wrapper.dir/llvm-offload-wrapper.cpp.o
707.421 [306/181/6569] Building CXX object tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceAliases.cpp.o
707.673 [306/180/6570] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/FindSymbols.cpp.o
707.861 [306/179/6571] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/ProjectModules.cpp.o
707.946 [306/178/6572] Building CXX object tools/clang/tools/extra/clang-include-fixer/plugin/CMakeFiles/obj.clangIncludeFixerPlugin.dir/IncludeFixerPlugin.cpp.o
708.039 [306/177/6573] Building CXX object tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceFunctionBodies.cpp.o
708.131 [306/176/6574] Building CXX object tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceDbgRecords.cpp.o
708.269 [306/175/6575] Building CXX object tools/llc/CMakeFiles/llc.dir/llc.cpp.o
708.282 [306/174/6576] Building CXX object tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceGlobalObjects.cpp.o
708.293 [306/173/6577] Building CXX object tools/llvm-ifs/CMakeFiles/llvm-ifs.dir/llvm-ifs.cpp.o
708.413 [306/172/6578] Building CXX object tools/llvm-dwp/CMakeFiles/llvm-dwp.dir/llvm-dwp.cpp.o
708.451 [306/171/6579] Building CXX object lib/DebugInfo/LogicalView/CMakeFiles/LLVMDebugInfoLogicalView.dir/LVReaderHandler.cpp.o
708.550 [306/170/6580] Building CXX object tools/llvm-mca/CMakeFiles/llvm-mca.dir/CodeRegionGenerator.cpp.o
708.562 [306/169/6581] Building CXX object tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/IncludeFixer.cpp.o
708.605 [306/168/6582] Building CXX object tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/TestRunner.cpp.o
708.608 [306/167/6583] Building CXX object tools/llvm-exegesis/lib/X86/CMakeFiles/obj.LLVMExegesisX86.dir/Target.cpp.o
708.787 [306/166/6584] Building CXX object tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceAttributes.cpp.o
708.915 [306/165/6585] Building CXX object tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/ReduceGlobalValues.cpp.o
708.961 [306/164/6586] Building CXX object tools/llvm-ir2vec/CMakeFiles/llvm-ir2vec.dir/llvm-ir2vec.cpp.o
709.225 [306/163/6587] Building CXX object lib/DebugInfo/LogicalView/CMakeFiles/LLVMDebugInfoLogicalView.dir/Readers/LVIRReader.cpp.o

```

</details>

https://github.com/llvm/llvm-project/pull/208727