[PATCH] D67771: [AMDGPU] fixed underflow in getOccupancyWithNumVGPRs

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL372350: [AMDGPU] fixed underflow in getOccupancyWithNumVGPRs (authored by rampitec, committed by ).

Changed prior to commit:
  https://reviews.llvm.org/D67771?vs=220893&id=220903#toc

Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D67771/new/

https://reviews.llvm.org/D67771

Files:
  llvm/trunk/lib/Target/AMDGPU/AMDGPUSubtarget.cpp


Index: llvm/trunk/lib/Target/AMDGPU/AMDGPUSubtarget.cpp
===================================================================
--- llvm/trunk/lib/Target/AMDGPU/AMDGPUSubtarget.cpp
+++ llvm/trunk/lib/Target/AMDGPU/AMDGPUSubtarget.cpp
@@ -599,7 +599,7 @@
   if (VGPRs < Granule)
     return MaxWaves;
   unsigned RoundedRegs = ((VGPRs + Granule - 1) / Granule) * Granule;
-  return std::min(getTotalNumVGPRs() / RoundedRegs, MaxWaves);
+  return std::min(std::max(getTotalNumVGPRs() / RoundedRegs, 1u), MaxWaves);
 }
 
 unsigned GCNSubtarget::getReservedNumSGPRs(const MachineFunction &MF) const {


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