llvm-project

e5dde744 - [AMDGPU] Add initial cost function framework for balanced scheduling

[AMDGPU] Add initial cost function framework for balanced scheduling Introduce an initial cost function into the AMDGPU instruction scheduler as the foundation for a more balanced scheduling framework. The goal is to move beyond occupancy-as-a-hard-target by providing a configurable mechanism to evaluate trade-offs between different candidate schedules. Key features: Schedule length term weighted by block frequency. Weighted occupancy cost with concave penalty that rewards lower initial occupancy gains more than later ones. Large additive penalty to strongly discourage schedules that increase spilling. Configurable weights and knobs to support tuning.