Index: lib/Target/AMDGPU/SIMachineScheduler.h
===================================================================
--- lib/Target/AMDGPU/SIMachineScheduler.h
+++ lib/Target/AMDGPU/SIMachineScheduler.h
@@ -467,6 +467,14 @@
     return InRegs;
   }
 
+  std::set<unsigned> getOutRegs() {
+    std::set<unsigned> OutRegs;
+    for (const auto &RegMaskPair : RPTracker.getPressure().LiveOutRegs) {
+      OutRegs.insert(RegMaskPair.RegUnit);
+    }
+    return OutRegs;
+  };
+
   unsigned getVGPRSetID() const { return VGPRSetID; }
   unsigned getSGPRSetID() const { return SGPRSetID; }
 
Index: lib/Target/AMDGPU/SIMachineScheduler.cpp
===================================================================
--- lib/Target/AMDGPU/SIMachineScheduler.cpp
+++ lib/Target/AMDGPU/SIMachineScheduler.cpp
@@ -1361,6 +1361,29 @@
   std::set<unsigned> InRegs = DAG->getInRegs();
   addLiveRegs(InRegs);
 
+  // Increase LiveOutRegsNumUsages for blocks
+  // producing registers consumed in another
+  // scheduling region.
+  for (unsigned Reg : DAG->getOutRegs()) {
+    for (unsigned i = 0, e = Blocks.size(); i != e; ++i) {
+      // Do reverse traversal
+      int ID = BlocksStruct.TopDownIndex2Block[Blocks.size()-1-i];
+      SIScheduleBlock *Block = Blocks[ID];
+      std::set<unsigned> OutRegs = Block->getOutRegs();
+
+      if (OutRegs.find(Reg) == OutRegs.end())
+        continue;
+
+      if (LiveOutRegsNumUsages[ID].find(Reg) ==
+            LiveOutRegsNumUsages[ID].end()) {
+        LiveOutRegsNumUsages[ID][Reg] = 1;
+      } else {
+        ++LiveOutRegsNumUsages[ID][Reg];
+      }
+      break;
+    }
+  }
+
   // Fill LiveRegsConsumers for regs that were already
   // defined before scheduling.
   for (unsigned i = 0, e = Blocks.size(); i != e; ++i) {