[llvm] [Transforms][DXIL] Tool to generate resource metadata and annotations (PR #98939)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-aarch64-quick` running on `linaro-clang-aarch64-quick` while building `llvm` at step 5 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/65/builds/1486

Here is the relevant piece of the build log for the reference:
```
Step 5 (ninja check 1) failure: stage 1 checked (failure)
...
[1093/1105] Building CXX object unittests/tools/llvm-mca/CMakeFiles/LLVMMCATests.dir/MCATestBase.cpp.o
[1094/1105] Linking CXX executable unittests/tools/llvm-profgen/LLVMProfgenTests
[1095/1105] Linking CXX executable unittests/Transforms/Coroutines/CoroTests
[1096/1105] Linking CXX executable unittests/Transforms/Instrumentation/InstrumentationTests
[1097/1105] Linking CXX executable unittests/tools/llvm-profdata/LLVMProfdataTests
[1098/1105] Linking CXX executable unittests/Transforms/Vectorize/VectorizeTests
[1099/1105] Linking CXX executable unittests/tools/llvm-mca/LLVMMCATests
[1100/1105] Linking CXX executable unittests/Transforms/Scalar/ScalarTests
[1101/1105] Linking CXX executable unittests/tools/llvm-exegesis/LLVMExegesisTests
[1102/1105] Building CXX object unittests/Transforms/Utils/CMakeFiles/UtilsTests.dir/DXILResourceTest.cpp.o
FAILED: unittests/Transforms/Utils/CMakeFiles/UtilsTests.dir/DXILResourceTest.cpp.o 
/usr/local/bin/c++ -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/home/tcwg-buildbot/worker/clang-aarch64-quick/stage1/unittests/Transforms/Utils -I/home/tcwg-buildbot/worker/clang-aarch64-quick/llvm/llvm/unittests/Transforms/Utils -I/home/tcwg-buildbot/worker/clang-aarch64-quick/stage1/include -I/home/tcwg-buildbot/worker/clang-aarch64-quick/llvm/llvm/include -I/home/tcwg-buildbot/worker/clang-aarch64-quick/llvm/third-party/unittest/googletest/include -I/home/tcwg-buildbot/worker/clang-aarch64-quick/llvm/third-party/unittest/googlemock/include -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 -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG  -Wno-variadic-macros -Wno-gnu-zero-variadic-macro-arguments -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -Wno-suggest-override -std=c++17 -MD -MT unittests/Transforms/Utils/CMakeFiles/UtilsTests.dir/DXILResourceTest.cpp.o -MF unittests/Transforms/Utils/CMakeFiles/UtilsTests.dir/DXILResourceTest.cpp.o.d -o unittests/Transforms/Utils/CMakeFiles/UtilsTests.dir/DXILResourceTest.cpp.o -c /home/tcwg-buildbot/worker/clang-aarch64-quick/llvm/llvm/unittests/Transforms/Utils/DXILResourceTest.cpp
../llvm/llvm/unittests/Transforms/Utils/DXILResourceTest.cpp:60:52: error: unknown type name 'nullptr_t'; did you mean 'std::nullptr_t'?
   60 |   void appendMDs(SmallVectorImpl<Metadata *> &MDs, nullptr_t V, Ts... More) {
      |                                                    ^~~~~~~~~
      |                                                    std::nullptr_t
/usr/lib/gcc/aarch64-linux-gnu/10/../../../../include/aarch64-linux-gnu/c++/10/bits/c++config.h:268:29: note: 'std::nullptr_t' declared here
  268 |   typedef decltype(nullptr)     nullptr_t;
      |                                 ^
1 error generated.
[1103/1105] Linking CXX executable tools/clang/unittests/Tooling/ToolingTests
ninja: build stopped: subcommand failed.

```

https://github.com/llvm/llvm-project/pull/98939