Index: llvm/trunk/lib/CodeGen/MachineVerifier.cpp
===================================================================
--- llvm/trunk/lib/CodeGen/MachineVerifier.cpp
+++ llvm/trunk/lib/CodeGen/MachineVerifier.cpp
@@ -251,6 +251,7 @@
     void verifyStackFrame();
 
     void verifySlotIndexes() const;
+    void verifyProperties(const MachineFunction &MF);
   };
 
   struct MachineVerifierPass : public MachineFunctionPass {
@@ -307,6 +308,19 @@
   }
 }
 
+void MachineVerifier::verifyProperties(const MachineFunction &MF) {
+  // If a pass has introduced virtual registers without clearing the
+  // AllVRegsAllocated property (or set it without allocating the vregs)
+  // then report an error.
+  if (MF.getProperties().hasProperty(
+          MachineFunctionProperties::Property::AllVRegsAllocated) &&
+      MRI->getNumVirtRegs()) {
+    report(
+        "Function has AllVRegsAllocated property but there are VReg operands",
+        &MF);
+  }
+}
+
 unsigned MachineVerifier::verify(MachineFunction &MF) {
   foundErrors = 0;
 
@@ -331,6 +345,8 @@
 
   verifySlotIndexes();
 
+  verifyProperties(MF);
+
   visitMachineFunctionBefore();
   for (MachineFunction::const_iterator MFI = MF.begin(), MFE = MF.end();
        MFI!=MFE; ++MFI) {
Index: llvm/trunk/lib/CodeGen/RegAllocBasic.cpp
===================================================================
--- llvm/trunk/lib/CodeGen/RegAllocBasic.cpp
+++ llvm/trunk/lib/CodeGen/RegAllocBasic.cpp
@@ -83,11 +83,6 @@
   /// RABasic analysis usage.
   void getAnalysisUsage(AnalysisUsage &AU) const override;
 
-  MachineFunctionProperties getSetProperties() const override {
-    return MachineFunctionProperties().set(
-        MachineFunctionProperties::Property::AllVRegsAllocated);
-  }
-
   void releaseMemory() override;
 
   Spiller &spiller() override { return *SpillerInstance; }
Index: llvm/trunk/lib/CodeGen/RegAllocGreedy.cpp
===================================================================
--- llvm/trunk/lib/CodeGen/RegAllocGreedy.cpp
+++ llvm/trunk/lib/CodeGen/RegAllocGreedy.cpp
@@ -322,10 +322,6 @@
 
   /// RAGreedy analysis usage.
   void getAnalysisUsage(AnalysisUsage &AU) const override;
-  MachineFunctionProperties getSetProperties() const override {
-    return MachineFunctionProperties().set(
-        MachineFunctionProperties::Property::AllVRegsAllocated);
-  }
   void releaseMemory() override;
   Spiller &spiller() override { return *SpillerInstance; }
   void enqueue(LiveInterval *LI) override;
Index: llvm/trunk/lib/CodeGen/RegAllocPBQP.cpp
===================================================================
--- llvm/trunk/lib/CodeGen/RegAllocPBQP.cpp
+++ llvm/trunk/lib/CodeGen/RegAllocPBQP.cpp
@@ -106,11 +106,6 @@
   /// PBQP analysis usage.
   void getAnalysisUsage(AnalysisUsage &au) const override;
 
-  MachineFunctionProperties getSetProperties() const override {
-    return MachineFunctionProperties().set(
-        MachineFunctionProperties::Property::AllVRegsAllocated);
-  }
-
   /// Perform register allocation
   bool runOnMachineFunction(MachineFunction &MF) override;
 
Index: llvm/trunk/lib/CodeGen/VirtRegMap.cpp
===================================================================
--- llvm/trunk/lib/CodeGen/VirtRegMap.cpp
+++ llvm/trunk/lib/CodeGen/VirtRegMap.cpp
@@ -176,6 +176,10 @@
   void getAnalysisUsage(AnalysisUsage &AU) const override;
 
   bool runOnMachineFunction(MachineFunction&) override;
+  MachineFunctionProperties getSetProperties() const override {
+    return MachineFunctionProperties().set(
+        MachineFunctionProperties::Property::AllVRegsAllocated);
+  }
 };
 } // end anonymous namespace
 
@@ -445,4 +449,3 @@
     }
   }
 }
-