XXXGenInstrInfo is too large which make the llvm project build process verly slowly

Hi guys,

We meet one issue that our instruction is 128 bits long, and very complex, which makes the XXXGenInstrInfo.inc file is very big(around 500MB)，and it make the building process too slowly, any method to split it or accelerate the build process?

Code line:

This is our cmake configurations:

cmake -G Ninja -DLLVM_ENABLE_PROJECTS="clang" \
-DLLVM_TARGETS_TO_BUILD="XXX_Target" \
-DCMAKE_BUILD_TYPE=Release \
-DLLVM_OPTIMIZED_TABLEGEN=true \
-DBUILD_SHARED_LIBS=ON \
-DLLVM_USE_LINKER=lld \
-DLLVM_PARALLEL_LINK_JOBS=16 \
../llvm