diff --git a/llvm/lib/CodeGen/GlobalISel/Utils.cpp b/llvm/lib/CodeGen/GlobalISel/Utils.cpp
--- a/llvm/lib/CodeGen/GlobalISel/Utils.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/Utils.cpp
@@ -426,8 +426,9 @@
       VReg, MRI, isFConstant, getCImmOrFPImmAsAPInt, LookThroughInstrs);
   if (!Reg)
     return std::nullopt;
-  return FPValueAndVReg{getConstantFPVRegVal(Reg->VReg, MRI)->getValueAPF(),
-                        Reg->VReg};
+  const ConstantFP *CFP = getConstantFPVRegVal(Reg->VReg, MRI);
+  assert(CFP && "invalid ConstantFP!");
+  return FPValueAndVReg{CFP->getValueAPF(), Reg->VReg};
 }
 
 const ConstantFP *