llvm-project

07aec21c - [AMDGPU] merge 16bit mov pairs in post-RA peephole (#208625)

[AMDGPU] merge 16bit mov pairs in post-RA peephole (#208625) Address https://github.com/llvm/llvm-project/issues/207011. Add 5 patterns to merge 16bit mov pairs. Since we hoist instruction which might cross the waitcnt boundary, insert a new pass before waitcnt for this transformation Co-Authored-By: Claude