Index: llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
===================================================================
--- llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
+++ llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
@@ -2392,7 +2392,8 @@
   case VCCZ: {
     const MachineRegisterInfo &MRI = MBB.getParent()->getRegInfo();
     const TargetRegisterClass *RC = MRI.getRegClass(TrueReg);
-    assert(MRI.getRegClass(FalseReg) == RC);
+    if (MRI.getRegClass(FalseReg) != RC)
+      return false;
 
     int NumInsts = AMDGPU::getRegBitWidth(RC->getID()) / 32;
     CondCycles = TrueCycles = FalseCycles = NumInsts; // ???
@@ -2406,7 +2407,8 @@
     // with a vector one.
     const MachineRegisterInfo &MRI = MBB.getParent()->getRegInfo();
     const TargetRegisterClass *RC = MRI.getRegClass(TrueReg);
-    assert(MRI.getRegClass(FalseReg) == RC);
+    if (MRI.getRegClass(FalseReg) != RC)
+      return false;
 
     int NumInsts = AMDGPU::getRegBitWidth(RC->getID()) / 32;