[llvm] [AMDGPU] SelectionDAG divergence tracking should take into account Target divergency. (PR #144947)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-x86_64-debian-fast` running on `gribozavr4` while building `llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/56/builds/30025

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

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
...
3.190 [10/57/1176] Linking CXX executable unittests/ExecutionEngine/MCJIT/MCJITTests
3.714 [10/56/1177] Linking CXX executable unittests/tools/llvm-exegesis/LLVMExegesisTests
3.978 [10/55/1178] Linking CXX executable unittests/DebugInfo/DWARF/DebugInfoDWARFTests
4.058 [10/54/1179] Linking CXX executable unittests/DebugInfo/LogicalView/DebugInfoLogicalViewTests
4.399 [10/53/1180] Linking CXX executable unittests/MI/MITests
4.677 [10/52/1181] Linking CXX executable unittests/Target/TargetMachineCTests
5.168 [10/51/1182] Linking CXX executable tools/clang/tools/extra/clangd/unittests/ClangdTests
5.528 [10/50/1183] Linking CXX executable tools/clang/unittests/Interpreter/ExceptionTests/ClangReplInterpreterExceptionTests
7.010 [10/49/1184] Linking CXX executable tools/clang/unittests/Interpreter/ClangReplInterpreterTests
7.149 [10/48/1185] Building CXX object unittests/Target/AArch64/CMakeFiles/AArch64Tests.dir/AArch64SelectionDAGTest.cpp.o
FAILED: unittests/Target/AArch64/CMakeFiles/AArch64Tests.dir/AArch64SelectionDAGTest.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes CCACHE_SLOPPINESS=pch_defines,time_macros /usr/bin/ccache /usr/bin/clang++ -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 -I/b/1/clang-x86_64-debian-fast/llvm.obj/unittests/Target/AArch64 -I/b/1/clang-x86_64-debian-fast/llvm.src/llvm/unittests/Target/AArch64 -I/b/1/clang-x86_64-debian-fast/llvm.obj/include -I/b/1/clang-x86_64-debian-fast/llvm.src/llvm/include -I/b/1/clang-x86_64-debian-fast/llvm.src/llvm/lib/Target/AArch64 -I/b/1/clang-x86_64-debian-fast/llvm.obj/lib/Target/AArch64 -I/b/1/clang-x86_64-debian-fast/llvm.src/third-party/unittest/googletest/include -I/b/1/clang-x86_64-debian-fast/llvm.src/third-party/unittest/googlemock/include -std=c++11 -Wdocumentation -Wno-documentation-deprecated-sync -fPIC -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/Target/AArch64/CMakeFiles/AArch64Tests.dir/AArch64SelectionDAGTest.cpp.o -MF unittests/Target/AArch64/CMakeFiles/AArch64Tests.dir/AArch64SelectionDAGTest.cpp.o.d -o unittests/Target/AArch64/CMakeFiles/AArch64Tests.dir/AArch64SelectionDAGTest.cpp.o -c /b/1/clang-x86_64-debian-fast/llvm.src/llvm/unittests/Target/AArch64/AArch64SelectionDAGTest.cpp
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/llvm/unittests/Target/AArch64/AArch64SelectionDAGTest.cpp:8:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/llvm/lib/Target/AArch64/AArch64SelectionDAGInfo.h:16:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/llvm/include/llvm/CodeGen/SelectionDAGTargetInfo.h:20:
/b/1/clang-x86_64-debian-fast/llvm.src/llvm/include/llvm/CodeGen/SelectionDAGNodes.h:2293:10: warning: HTML start tag prematurely ended, expected attribute name or '>' [-Wdocumentation]
  /// "<a, a+n, a+2n, a+3n, ...>" where a is integer and n is a non-zero integer,
         ^
/b/1/clang-x86_64-debian-fast/llvm.src/llvm/include/llvm/CodeGen/SelectionDAGNodes.h:2294:20: warning: HTML start tag prematurely ended, expected attribute name or '>' [-Wdocumentation]
  /// the value "<a,n>" is returned.
                   ^
/b/1/clang-x86_64-debian-fast/llvm.src/llvm/include/llvm/CodeGen/SelectionDAGNodes.h:2294:19: warning: HTML tag 'a' requires an end tag [-Wdocumentation-html]
  /// the value "<a,n>" is returned.
                  ^
/b/1/clang-x86_64-debian-fast/llvm.src/llvm/include/llvm/CodeGen/SelectionDAGNodes.h:2293:9: warning: HTML tag 'a' requires an end tag [-Wdocumentation-html]
  /// "<a, a+n, a+2n, a+3n, ...>" where a is integer and n is a non-zero integer,
        ^
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/llvm/unittests/Target/AArch64/AArch64SelectionDAGTest.cpp:14:
/b/1/clang-x86_64-debian-fast/llvm.src/llvm/include/llvm/CodeGen/TargetLowering.h:5468:14: warning: parameter 'N' not found in the function declaration [-Wdocumentation]
  /// \param N Node to expand
             ^
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/llvm/unittests/Target/AArch64/AArch64SelectionDAGTest.cpp:15:
/b/1/clang-x86_64-debian-fast/llvm.src/llvm/include/llvm/IR/MDBuilder.h:65:14: warning: parameter 'Do' not found in the function declaration [-Wdocumentation]
  /// @param Do these weights come from __builtin_expect*
             ^~
/b/1/clang-x86_64-debian-fast/llvm.src/llvm/include/llvm/IR/MDBuilder.h:65:14: note: did you mean 'IsExpected'?
  /// @param Do these weights come from __builtin_expect*
             ^~
             IsExpected
/b/1/clang-x86_64-debian-fast/llvm.src/llvm/include/llvm/IR/MDBuilder.h:80:14: warning: parameter 'Do' not found in the function declaration [-Wdocumentation]
  /// @param Do these weights come from __builtin_expect*
             ^~
/b/1/clang-x86_64-debian-fast/llvm.src/llvm/include/llvm/IR/MDBuilder.h:80:14: note: did you mean 'IsExpected'?
  /// @param Do these weights come from __builtin_expect*
             ^~
             IsExpected
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/llvm/unittests/Target/AArch64/AArch64SelectionDAGTest.cpp:17:
/b/1/clang-x86_64-debian-fast/llvm.src/llvm/include/llvm/MC/TargetRegistry.h:85:12: warning: parameter 'ShowInst' not found in the function declaration [-Wdocumentation]
/// \param ShowInst - Whether to show the MCInst representation inline with

```

</details>

https://github.com/llvm/llvm-project/pull/144947