Based on the output of include-what-you-use.
It's an utility directory, so no much impact on other code areas.
clang++ -E -Iinclude -I../llvm/include ../llvm/utils/TableGen/*.cpp -std=c++14 -fno-rtti -fno-exceptions | wc -l
before: 4327274
after: 4316190
Related discourse thread: https://llvm.discourse.group/t/include-what-you-use-include-cleanup
Differential Revision: https://reviews.llvm.org/D118466
Not only RISCV but also other target such as CSKY, there are compressed instructions mixed with normal instructions.
To reuse the basic infra to compress/uncompress and predict instruction, we need reconstruct the RISCVCompressInstEmitter
and make it more general and suitable for other target.
Differential Revision: https://reviews.llvm.org/D113475
serge-sans-paille