Index: llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
===================================================================
--- llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -3272,8 +3272,10 @@
   // execute VF scalar calls, and then gather the result into the vector return
   // value.
   unsigned ScalarCallCost = TTI.getCallInstrCost(F, ScalarRetTy, ScalarTys);
-  if (VF == 1)
+  if (VF == 1) {
+    NeedToScalarize = true;
     return ScalarCallCost;
+  }
 
   // Compute corresponding vector type for return value and arguments.
   Type *RetTy = ToVectorTy(ScalarRetTy, VF);
Index: llvm/test/Transforms/LoopVectorize/scalarizeVFne.ll
===================================================================
--- /dev/null
+++ llvm/test/Transforms/LoopVectorize/scalarizeVFne.ll
@@ -0,0 +1,28 @@
+; RUN: opt < %s -passes=loop-vectorize -S 2>&1 | FileCheck %s
+
+target triple = "powerpc64le-unknown-linux-gnu"
+%type = type { [3 x double] }
+
+define void @foo(double* %A, double* %C, %type* %B) #0 {
+; CHECK-NOT: Vector function shape is missing from the database
+entry:
+  br label %for.body
+
+for.body: 
+  %i = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+  %dummyload2 = load double, double* %A, align 8
+  %arrayidx.i24 = getelementptr inbounds %type, %type* %B, i64 %i, i32 0, i32 0
+  %_15 = load double, double* %arrayidx.i24, align 8
+  %call10 = tail call fast double @atan(double %_15) #1
+  %inc = add i64 %i, 1
+  %cmp = icmp ugt i64 1000, %inc
+  br i1 %cmp, label %for.body, label %for.end
+
+for.end: 
+  ret void
+}
+
+declare double @atan(double) local_unnamed_addr
+declare <2 x double> @__atand2_massv(<2 x double>) #1
+attributes #0 = { "target-cpu"="pwr9" }
+attributes #1 = { nounwind readnone "vector-function-abi-variant"="_ZGV_LLVM_N2v_atan(__atand2_massv)" }