[llvm-branch-commits] [llvm] [AMDGPU] Apply occupancy-aware register allocation anti-hints (PR #218074)

[Syadus Sefat via llvm-branch-commits]

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@@ -364,6 +369,17 @@ class SIRegisterInfo final : public AMDGPUGenRegisterInfo {
                              const MachineFunction &MF, const VirtRegMap *VRM,
                              const LiveRegMatrix *Matrix) const override;
 
+  bool shouldApplyAntiHints(const MachineFunction &MF,
+                            unsigned NumAllocatedVGPRs,
+                            unsigned &MaxVGPRsForCurrentOccupancy) const;
+
+  void applyRegAllocationAntiHints(
+      Register VirtReg, ArrayRef<MCPhysReg> Order,
+      SmallVectorImpl<MCPhysReg> &HintsAndCustomOrder, unsigned NumHints,
+      SmallVectorImpl<MCPhysReg> &AntiHints, const MachineFunction &MF,
+      const VirtRegMap *VRM = nullptr,
+      const LiveRegMatrix *Matrix = nullptr) const override;
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mssefat wrote:

Updated it.

https://github.com/llvm/llvm-project/pull/218074