Index: llvm/lib/Analysis/CFLGraph.h
===================================================================
--- llvm/lib/Analysis/CFLGraph.h
+++ llvm/lib/Analysis/CFLGraph.h
@@ -291,6 +291,11 @@
       addAssignEdge(Op2, &Inst);
     }
 
+    void visitUnaryOperator(UnaryOperator &Inst) {
+      auto *Src = Inst.getOperand(0);
+      addAssignEdge(Src, &Inst);
+    }
+
     void visitAtomicCmpXchgInst(AtomicCmpXchgInst &Inst) {
       auto *Ptr = Inst.getPointerOperand();
       auto *Val = Inst.getNewValOperand();
@@ -579,6 +584,11 @@
         break;
       }
 
+      case Instruction::FNeg: {
+        addAssignEdge(CE->getOperand(0), CE);
+        break;
+      }
+
       default:
         llvm_unreachable("Unknown instruction type encountered!");
       }
Index: llvm/test/Analysis/CFLAliasAnalysis/Steensgaard/must-and-partial.ll
===================================================================
--- llvm/test/Analysis/CFLAliasAnalysis/Steensgaard/must-and-partial.ll
+++ llvm/test/Analysis/CFLAliasAnalysis/Steensgaard/must-and-partial.ll
@@ -49,6 +49,7 @@
   %1 = load double, double* %arrayidx22
   %arrayidx25 = getelementptr inbounds double, double* %A, i64 2
   %2 = load double, double* %arrayidx25
-  %mul26 = fmul double %1, %2
+  %3 = fneg double %1
+  %mul26 = fmul double %3, %2
   ret void
 }