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

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `lldb-aarch64-ubuntu` running on `linaro-lldb-aarch64-ubuntu` while building `llvm` at step 4 "build".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/59/builds/36177

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

```
Step 4 (build) failure: build (failure)
...
2157.788 [467/2/6828] Linking CXX static library lib/libLLVMUBAwareInterpreter.a
2157.794 [458/10/6829] Building Options.inc...
2157.799 [458/9/6830] Building C object tools/llvm-c-test/CMakeFiles/llvm-c-test.dir/targets.c.o
2157.830 [458/8/6831] Building CXX object tools/llvm-cas-fuzzer/CMakeFiles/llvm-cas-fuzzer.dir/DummyCASFuzzer.cpp.o
2157.880 [458/7/6832] Linking CXX executable bin/llubi
2158.158 [458/6/6833] Building CXX object tools/lli/CMakeFiles/lli.dir/lli.cpp.o
2158.418 [457/6/6834] Building CXX object tools/llvm-cat/CMakeFiles/llvm-cat.dir/llvm-cat.cpp.o
2158.439 [457/5/6835] Building CXX object tools/llvm-cas-fuzzer/CMakeFiles/llvm-cas-fuzzer.dir/cas-fuzzer.cpp.o
2158.494 [457/4/6836] Linking CXX executable bin/lli
2159.256 [457/3/6837] Building CXX object tools/llvm-calc-occupancy/CMakeFiles/llvm-calc-occupancy.dir/llvm-calc-occupancy.cpp.o
FAILED: tools/llvm-calc-occupancy/CMakeFiles/llvm-calc-occupancy.dir/llvm-calc-occupancy.cpp.o 
/usr/local/bin/c++ -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/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/tools/llvm-calc-occupancy -I/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/llvm-project/llvm/tools/llvm-calc-occupancy -I/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/include -I/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/llvm-project/llvm/include -I/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/llvm-project/llvm/lib/Target/AMDGPU -I/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/lib/Target/AMDGPU -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -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/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/lib/CodeGen/CMakeFiles/LLVMCodeGen.dir/cmake_pch.hxx.pch -Xclang -include -Xclang /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/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/tcwg-buildbot/worker/lldb-aarch64-ubuntu/llvm-project/llvm/tools/llvm-calc-occupancy/llvm-calc-occupancy.cpp
/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/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 'getAddressableNumVGPRs'?
  229 |   unsigned AddrSGPRs = AMDGPU::IsaInfo::getAddressableNumSGPRs(STI);
      |                                         ^~~~~~~~~~~~~~~~~~~~~~
      |                                         getAddressableNumVGPRs
/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/llvm-project/llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.h:281:10: note: 'getAddressableNumVGPRs' declared here
  281 | unsigned getAddressableNumVGPRs(const MCSubtargetInfo &STI,
      |          ^
/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/llvm-project/llvm/tools/llvm-calc-occupancy/llvm-calc-occupancy.cpp:229:67: error: too few arguments to function call, expected 2, have 1
  229 |   unsigned AddrSGPRs = AMDGPU::IsaInfo::getAddressableNumSGPRs(STI);
      |                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~    ^
/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/llvm-project/llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.h:281:10: note: 'getAddressableNumVGPRs' declared here
  281 | unsigned getAddressableNumVGPRs(const MCSubtargetInfo &STI,
      |          ^                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~
  282 |                                 unsigned DynamicVGPRBlockSize);
      |                                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2 errors generated.
2159.982 [457/2/6838] Building CXX object tools/llvm-cfi-verify/CMakeFiles/llvm-cfi-verify.dir/llvm-cfi-verify.cpp.o
2160.735 [457/1/6839] Building CXX object tools/llvm-cfi-verify/lib/CMakeFiles/LLVMCFIVerify.dir/FileAnalysis.cpp.o
ninja: build stopped: subcommand failed.

```

</details>

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