Index: lib/Target/AMDGPU/SIWholeQuadMode.cpp
===================================================================
--- lib/Target/AMDGPU/SIWholeQuadMode.cpp
+++ lib/Target/AMDGPU/SIWholeQuadMode.cpp
@@ -200,6 +200,8 @@
 
   void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.addRequired<LiveIntervals>();
+    AU.addPreserved<SlotIndexes>();
+    AU.addPreserved<LiveIntervals>();
     AU.setPreservesCFG();
     MachineFunctionPass::getAnalysisUsage(AU);
   }