CI - Linux x64 clang BYO LLVM failing during build

[Eliasj42]

What happened?

CI - Linux x64 clang BYO LLVM is failing when building LLvm with the message

[261/2614] Building CXX object tools/mlir-opt/CMakeFiles/mlir-opt.dir/mlir-opt.cpp.o
FAILED: tools/mlir-opt/CMakeFiles/mlir-opt.dir/mlir-opt.cpp.o 
ccache /usr/bin/clang++ -DGTEST_HAS_RTTI=0 -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/__w/iree/iree/build-byo-llvm/mlir/tools/mlir-opt -I/__w/iree/iree/third_party/llvm-project/mlir/tools/mlir-opt -I/__w/iree/iree/build-byo-llvm/install/llvm/include -I/__w/iree/iree/third_party/llvm-project/mlir/include -I/__w/iree/iree/build-byo-llvm/mlir/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 -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 -Wundef -Werror=mismatched-tags -O3 -DNDEBUG  -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-rtti -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-rtti -std=gnu++17 -MD -MT tools/mlir-opt/CMakeFiles/mlir-opt.dir/mlir-opt.cpp.o -MF tools/mlir-opt/CMakeFiles/mlir-opt.dir/mlir-opt.cpp.o.d -o tools/mlir-opt/CMakeFiles/mlir-opt.dir/mlir-opt.cpp.o -c /__w/iree/iree/third_party/llvm-project/mlir/tools/mlir-opt/mlir-opt.cpp
In file included from /__w/iree/iree/third_party/llvm-project/mlir/tools/mlir-opt/mlir-opt.cpp:14:
In file included from /__w/iree/iree/third_party/llvm-project/mlir/include/mlir/IR/AsmState.h:18:
In file included from /__w/iree/iree/third_party/llvm-project/mlir/include/mlir/IR/OperationSupport.h:18:
In file included from /__w/iree/iree/third_party/llvm-project/mlir/include/mlir/IR/BlockSupport.h:16:
In file included from /__w/iree/iree/third_party/llvm-project/mlir/include/mlir/IR/Value.h:17:
In file included from /__w/iree/iree/third_party/llvm-project/mlir/include/mlir/IR/UseDefLists.h:16:
/__w/iree/iree/third_party/llvm-project/mlir/include/mlir/IR/Location.h:145:10: fatal error: 'mlir/IR/BuiltinLocationAttributes.h.inc' file not found
#include "mlir/IR/BuiltinLocationAttributes.h.inc"
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

and

[266/2614] Building CXX object tools/mlir-reduce/CMakeFiles/mlir-reduce.dir/mlir-reduce.cpp.o
FAILED: tools/mlir-reduce/CMakeFiles/mlir-reduce.dir/mlir-reduce.cpp.o 
ccache /usr/bin/clang++ -DGTEST_HAS_RTTI=0 -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/__w/iree/iree/build-byo-llvm/mlir/tools/mlir-reduce -I/__w/iree/iree/third_party/llvm-project/mlir/tools/mlir-reduce -I/__w/iree/iree/build-byo-llvm/install/llvm/include -I/__w/iree/iree/third_party/llvm-project/mlir/include -I/__w/iree/iree/build-byo-llvm/mlir/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 -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 -Wundef -Werror=mismatched-tags -O3 -DNDEBUG  -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-rtti -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-rtti -std=gnu++17 -MD -MT tools/mlir-reduce/CMakeFiles/mlir-reduce.dir/mlir-reduce.cpp.o -MF tools/mlir-reduce/CMakeFiles/mlir-reduce.dir/mlir-reduce.cpp.o.d -o tools/mlir-reduce/CMakeFiles/mlir-reduce.dir/mlir-reduce.cpp.o -c /__w/iree/iree/third_party/llvm-project/mlir/tools/mlir-reduce/mlir-reduce.cpp
In file included from /__w/iree/iree/third_party/llvm-project/mlir/tools/mlir-reduce/mlir-reduce.cpp:16:
In file included from /__w/iree/iree/third_party/llvm-project/mlir/include/mlir/IR/Dialect.h:17:
In file included from /__w/iree/iree/third_party/llvm-project/mlir/include/mlir/IR/OperationSupport.h:18:
In file included from /__w/iree/iree/third_party/llvm-project/mlir/include/mlir/IR/BlockSupport.h:16:
In file included from /__w/iree/iree/third_party/llvm-project/mlir/include/mlir/IR/Value.h:17:
In file included from /__w/iree/iree/third_party/llvm-project/mlir/include/mlir/IR/UseDefLists.h:16:
/__w/iree/iree/third_party/llvm-project/mlir/include/mlir/IR/Location.h:145:10: fatal error: 'mlir/IR/BuiltinLocationAttributes.h.inc' file not found
#include "mlir/IR/BuiltinLocationAttributes.h.inc"
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Steps to reproduce your issue

Failed workflow runs can be found here

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