[llvm] [SandboxIR][NFC] Move Region from SandboxVectorizer to SandboxIR. (PR #110173)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `openmp-offload-sles-build-only` running on `rocm-worker-hw-04-sles` while building `llvm` at step 8 "Add check check-llvm".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/140/builds/7561

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

```
Step 8 (Add check check-llvm) failure: test (failure)
...
/home/botworker/bbot/builds/openmp-offload-sles-build/llvm.src/llvm/include/llvm/ProfileData/InstrProf.h:963:23: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
     assert(IPVK_First <= ValueKind && ValueKind <= IPVK_Last &&
            ~~~~~~~~~~~^~~~
/home/botworker/bbot/builds/openmp-offload-sles-build/llvm.src/llvm/include/llvm/ProfileData/InstrProf.h: In member function ‘std::vector<llvm::InstrProfValueSiteRecord>& llvm::InstrProfRecord::getOrCreateValueSitesForKind(uint32_t)’:
/home/botworker/bbot/builds/openmp-offload-sles-build/llvm.src/llvm/include/llvm/ProfileData/InstrProf.h:972:23: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
     assert(IPVK_First <= ValueKind && ValueKind <= IPVK_Last &&
            ~~~~~~~~~~~^~~~
[400/665] Building CXX object unittests/ProfileData/CMakeFiles/ProfileDataTests.dir/SampleProfTest.cpp.o
[401/665] Building CXX object unittests/ProfileData/CMakeFiles/ProfileDataTests.dir/SymbolRemappingReaderTest.cpp.o
[402/665] Building CXX object unittests/SandboxIR/CMakeFiles/SandboxIRTests.dir/RegionTest.cpp.o
FAILED: unittests/SandboxIR/CMakeFiles/SandboxIRTests.dir/RegionTest.cpp.o 
ccache /usr/bin/c++ -DGTEST_HAS_RTTI=0 -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -Iunittests/SandboxIR -I/home/botworker/bbot/builds/openmp-offload-sles-build/llvm.src/llvm/unittests/SandboxIR -Iinclude -I/home/botworker/bbot/builds/openmp-offload-sles-build/llvm.src/llvm/include -I/home/botworker/bbot/builds/openmp-offload-sles-build/llvm.src/third-party/unittest/googletest/include -I/home/botworker/bbot/builds/openmp-offload-sles-build/llvm.src/third-party/unittest/googlemock/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -fno-lifetime-dse -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-uninitialized -Wno-nonnull -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wno-comment -Wno-misleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG  -Wno-variadic-macros -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -Wno-suggest-override -std=c++1z -MD -MT unittests/SandboxIR/CMakeFiles/SandboxIRTests.dir/RegionTest.cpp.o -MF unittests/SandboxIR/CMakeFiles/SandboxIRTests.dir/RegionTest.cpp.o.d -o unittests/SandboxIR/CMakeFiles/SandboxIRTests.dir/RegionTest.cpp.o -c /home/botworker/bbot/builds/openmp-offload-sles-build/llvm.src/llvm/unittests/SandboxIR/RegionTest.cpp
/home/botworker/bbot/builds/openmp-offload-sles-build/llvm.src/llvm/unittests/SandboxIR/RegionTest.cpp:9:10: fatal error: llvm/Transforms/Vectorize/SandboxVectorizer/Region.h: No such file or directory
 #include "llvm/Transforms/Vectorize/SandboxVectorizer/Region.h"
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
[403/665] Linking CXX executable unittests/MC/X86/X86MCTests
[404/665] Building CXX object unittests/Option/CMakeFiles/OptionTests.dir/OptionMarshallingTest.cpp.o
[405/665] Linking CXX executable unittests/DebugInfo/GSYM/DebugInfoGSYMTests
[406/665] Building CXX object unittests/SandboxIR/CMakeFiles/SandboxIRTests.dir/PassTest.cpp.o
[407/665] Building CXX object unittests/SandboxIR/CMakeFiles/SandboxIRTests.dir/SandboxIRTest.cpp.o
[408/665] Building CXX object unittests/Option/CMakeFiles/OptionTests.dir/OptionParsingTest.cpp.o
[409/665] Linking CXX executable unittests/DebugInfo/BTF/DebugInfoBTFTests
[410/665] Linking CXX executable unittests/Remarks/RemarksTests
[411/665] Linking CXX executable unittests/ExecutionEngine/ExecutionEngineTests
[412/665] Linking CXX executable unittests/ExecutionEngine/JITLink/JITLinkTests
[413/665] Linking CXX executable unittests/Linker/LinkerTests
[414/665] Linking CXX executable unittests/DebugInfo/PDB/DebugInfoPDBTests
[415/665] Linking CXX executable unittests/ObjectYAML/ObjectYAMLTests
[416/665] Linking CXX executable unittests/MC/MCTests
[417/665] Linking CXX executable unittests/DebugInfo/LogicalView/DebugInfoLogicalViewTests
[418/665] Linking CXX executable unittests/Object/ObjectTests
[419/665] Linking CXX executable unittests/ObjCopy/ObjCopyTests
[420/665] Linking CXX executable unittests/Frontend/LLVMFrontendTests
[421/665] Linking CXX executable unittests/ProfileData/ProfileDataTests
[422/665] Linking CXX executable unittests/IR/IRTests
[423/665] Linking CXX executable unittests/Passes/PassBuilderBindings/PassesBindingsTests
[424/665] Linking CXX executable unittests/ExecutionEngine/MCJIT/MCJITTests
[425/665] Linking CXX executable unittests/MC/AMDGPU/AMDGPUMCTests
[426/665] Linking CXX executable unittests/Analysis/AnalysisTests
[427/665] Linking CXX executable unittests/ExecutionEngine/Orc/OrcJITTests
[428/665] Linking CXX executable unittests/Passes/Plugins/PluginsTests
[429/665] Linking CXX executable unittests/CodeGen/GlobalISel/GlobalISelTests
[430/665] Linking CXX executable unittests/CodeGen/CodeGenTests
[431/665] Linking CXX executable unittests/MIR/MIRTests
[432/665] Linking CXX executable unittests/MI/MITests
[433/665] Linking CXX executable unittests/DebugInfo/DWARF/DebugInfoDWARFTests
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/110173