[llvm] [RISCV] Fold Bitcast long bitwidth int to vector type (PR #194788)

[Zaky Hermawan via llvm-commits]

ZakyHermawan wrote:

Most of the changes happened because of `clang-format`, the core logic is quite simple (line 17518 - 17563)

https://github.com/llvm/llvm-project/pull/194788