================
@@ -4173,6 +4177,139 @@ bool SIRegisterInfo::getRegAllocationHints(Register
VirtReg,
}
}
+bool SIRegisterInfo::shouldApplyAntiHints(
+ const MachineFunction &MF, unsigned NumAllocatedVGPRs,
+ unsigned &MaxVGPRsForCurrentOccupancy) const {
+
+ const SIMachineFunctionInfo *MFI = MF.getInfo<SIMachineFunctionInfo>();
+ unsigned DynamicVGPRBlockSize = MFI->getDynamicVGPRBlockSize();
+ unsigned TargetOccupancy = MFI->getOccupancy();
+ unsigned CurrentOccupancy =
+ ST.getOccupancyWithNumVGPRs(NumAllocatedVGPRs, DynamicVGPRBlockSize);
+ MaxVGPRsForCurrentOccupancy =
+ ST.getMaxNumVGPRs(CurrentOccupancy, DynamicVGPRBlockSize);
+
+ LLVM_DEBUG(dbgs() << "anti-hints: " << NumAllocatedVGPRs
+ << " VGPRs allocated, target occupancy " << TargetOccupancy
+ << ", current occupancy " << CurrentOccupancy << '\n');
+
+ // If we are already at lowest occupancy, then there is no need to protect
+ // against occupancy regression.
+ if (CurrentOccupancy == 1)
----------------
mssefat wrote:
I have renamed the `TargetOccupancy` to` RecordedMaxOccupancy`.
https://github.com/llvm/llvm-project/pull/218074
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