diff --git a/clang/lib/CodeGen/CGStmtOpenMP.cpp b/clang/lib/CodeGen/CGStmtOpenMP.cpp
--- a/clang/lib/CodeGen/CGStmtOpenMP.cpp
+++ b/clang/lib/CodeGen/CGStmtOpenMP.cpp
@@ -3515,6 +3515,57 @@
   }
 }
 
+/// Copies final inscan reductions values to the original variables.
+/// The code is the following:
+/// \code
+/// <orig_var> = buffer[num_iters-1];
+/// \endcode
+static void emitScanBasedDirectiveFinals(
+    CodeGenFunction &CGF, const OMPLoopDirective &S,
+    llvm::function_ref<llvm::Value *(CodeGenFunction &)> NumIteratorsGen) {
+  llvm::Value *OMPScanNumIterations = CGF.Builder.CreateIntCast(
+      NumIteratorsGen(CGF), CGF.SizeTy, /*isSigned=*/false);
+  SmallVector<const Expr *, 4> Shareds;
+  SmallVector<const Expr *, 4> LHSs;
+  SmallVector<const Expr *, 4> RHSs;
+  SmallVector<const Expr *, 4> Privates;
+  SmallVector<const Expr *, 4> CopyOps;
+  SmallVector<const Expr *, 4> CopyArrayElems;
+  for (const auto *C : S.getClausesOfKind<OMPReductionClause>()) {
+    assert(C->getModifier() == OMPC_REDUCTION_inscan &&
+           "Only inscan reductions are expected.");
+    Shareds.append(C->varlist_begin(), C->varlist_end());
+    LHSs.append(C->lhs_exprs().begin(), C->lhs_exprs().end());
+    RHSs.append(C->rhs_exprs().begin(), C->rhs_exprs().end());
+    Privates.append(C->privates().begin(), C->privates().end());
+    CopyOps.append(C->copy_ops().begin(), C->copy_ops().end());
+    CopyArrayElems.append(C->copy_array_elems().begin(),
+                          C->copy_array_elems().end());
+  }
+  // Create temp var and copy LHS value to this temp value.
+  // LHS = TMP[LastIter];
+  llvm::Value *OMPLast = CGF.Builder.CreateNSWSub(
+      OMPScanNumIterations,
+      llvm::ConstantInt::get(CGF.SizeTy, 1, /*isSigned=*/false));
+  for (unsigned I = 0, E = CopyArrayElems.size(); I < E; ++I) {
+    const Expr *PrivateExpr = Privates[I];
+    const Expr *OrigExpr = Shareds[I];
+    const Expr *CopyArrayElem = CopyArrayElems[I];
+    CodeGenFunction::OpaqueValueMapping IdxMapping(
+        CGF,
+        cast<OpaqueValueExpr>(
+            cast<ArraySubscriptExpr>(CopyArrayElem)->getIdx()),
+        RValue::get(OMPLast));
+    LValue DestLVal = CGF.EmitLValue(OrigExpr);
+    LValue SrcLVal = CGF.EmitLValue(CopyArrayElem);
+    CGF.EmitOMPCopy(PrivateExpr->getType(), DestLVal.getAddress(CGF),
+                    SrcLVal.getAddress(CGF),
+                    cast<VarDecl>(cast<DeclRefExpr>(LHSs[I])->getDecl()),
+                    cast<VarDecl>(cast<DeclRefExpr>(RHSs[I])->getDecl()),
+                    CopyOps[I]);
+  }
+}
+
 /// Emits the code for the directive with inscan reductions.
 /// The code is the following:
 /// \code
@@ -3709,6 +3760,8 @@
     if (!isOpenMPParallelDirective(S.getDirectiveKind()))
       emitScanBasedDirectiveDecls(CGF, S, NumIteratorsGen);
     emitScanBasedDirective(CGF, S, NumIteratorsGen, FirstGen, SecondGen);
+    if (!isOpenMPParallelDirective(S.getDirectiveKind()))
+      emitScanBasedDirectiveFinals(CGF, S, NumIteratorsGen);
   } else {
     CodeGenFunction::OMPCancelStackRAII CancelRegion(CGF, S.getDirectiveKind(),
                                                      HasCancel);
@@ -4282,23 +4335,25 @@
     (void)emitWorksharingDirective(CGF, S, S.hasCancel());
   };
   {
-    if (llvm::any_of(S.getClausesOfKind<OMPReductionClause>(),
+    const auto &&NumIteratorsGen = [&S](CodeGenFunction &CGF) {
+      CodeGenFunction::OMPLocalDeclMapRAII Scope(CGF);
+      CGCapturedStmtInfo CGSI(CR_OpenMP);
+      CodeGenFunction::CGCapturedStmtRAII CapInfoRAII(CGF, &CGSI);
+      OMPLoopScope LoopScope(CGF, S);
+      return CGF.EmitScalarExpr(S.getNumIterations());
+    };
+    bool IsInscan = llvm::any_of(S.getClausesOfKind<OMPReductionClause>(),
                      [](const OMPReductionClause *C) {
                        return C->getModifier() == OMPC_REDUCTION_inscan;
-                     })) {
-      const auto &&NumIteratorsGen = [&S](CodeGenFunction &CGF) {
-        CodeGenFunction::OMPLocalDeclMapRAII Scope(CGF);
-        CGCapturedStmtInfo CGSI(CR_OpenMP);
-        CodeGenFunction::CGCapturedStmtRAII CapInfoRAII(CGF, &CGSI);
-        OMPLoopScope LoopScope(CGF, S);
-        return CGF.EmitScalarExpr(S.getNumIterations());
-      };
+                     });
+    if (IsInscan)
       emitScanBasedDirectiveDecls(*this, S, NumIteratorsGen);
-    }
     auto LPCRegion =
         CGOpenMPRuntime::LastprivateConditionalRAII::disable(*this, S);
     emitCommonOMPParallelDirective(*this, S, OMPD_for, CodeGen,
                                    emitEmptyBoundParameters);
+    if (IsInscan)
+      emitScanBasedDirectiveFinals(*this, S, NumIteratorsGen);
   }
   // Check for outer lastprivate conditional update.
   checkForLastprivateConditionalUpdate(*this, S);
@@ -4313,23 +4368,25 @@
     (void)emitWorksharingDirective(CGF, S, /*HasCancel=*/false);
   };
   {
-    if (llvm::any_of(S.getClausesOfKind<OMPReductionClause>(),
+    const auto &&NumIteratorsGen = [&S](CodeGenFunction &CGF) {
+      CodeGenFunction::OMPLocalDeclMapRAII Scope(CGF);
+      CGCapturedStmtInfo CGSI(CR_OpenMP);
+      CodeGenFunction::CGCapturedStmtRAII CapInfoRAII(CGF, &CGSI);
+      OMPLoopScope LoopScope(CGF, S);
+      return CGF.EmitScalarExpr(S.getNumIterations());
+    };
+    bool IsInscan = llvm::any_of(S.getClausesOfKind<OMPReductionClause>(),
                      [](const OMPReductionClause *C) {
                        return C->getModifier() == OMPC_REDUCTION_inscan;
-                     })) {
-      const auto &&NumIteratorsGen = [&S](CodeGenFunction &CGF) {
-        CodeGenFunction::OMPLocalDeclMapRAII Scope(CGF);
-        CGCapturedStmtInfo CGSI(CR_OpenMP);
-        CodeGenFunction::CGCapturedStmtRAII CapInfoRAII(CGF, &CGSI);
-        OMPLoopScope LoopScope(CGF, S);
-        return CGF.EmitScalarExpr(S.getNumIterations());
-      };
+                     });
+    if (IsInscan)
       emitScanBasedDirectiveDecls(*this, S, NumIteratorsGen);
-    }
     auto LPCRegion =
         CGOpenMPRuntime::LastprivateConditionalRAII::disable(*this, S);
     emitCommonOMPParallelDirective(*this, S, OMPD_for_simd, CodeGen,
                                    emitEmptyBoundParameters);
+    if (IsInscan)
+      emitScanBasedDirectiveFinals(*this, S, NumIteratorsGen);
   }
   // Check for outer lastprivate conditional update.
   checkForLastprivateConditionalUpdate(*this, S);
diff --git a/clang/test/OpenMP/parallel_for_scan_codegen.cpp b/clang/test/OpenMP/parallel_for_scan_codegen.cpp
--- a/clang/test/OpenMP/parallel_for_scan_codegen.cpp
+++ b/clang/test/OpenMP/parallel_for_scan_codegen.cpp
@@ -27,6 +27,13 @@
   // CHECK: [[B_BUF:%.+]] = alloca double, i64 10,
 
   // CHECK: call void (%struct.ident_t*, i32, void (i32*, i32*, ...)*, ...) @__kmpc_fork_call(
+  // CHECK: [[LAST:%.+]] = mul nsw i64 9, %
+  // CHECK: [[LAST_REF:%.+]] = getelementptr inbounds float, float* [[A_BUF]], i64 [[LAST]]
+  // CHECK: [[BC:%.+]] = bitcast float* [[LAST_REF]] to i8*
+  // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 16 bitcast ([10 x float]* @_ZZ3baziE1a to i8*), i8* align 4 [[BC]], i64 %{{.+}}, i1 false)
+  // CHECK: [[LAST_REF_B:%.+]] = getelementptr inbounds double, double* [[B_BUF]], i64 9
+  // CHECK: [[LAST_VAL:%.+]] = load double, double* [[LAST_REF_B]],
+  // CHECK: store double [[LAST_VAL]], double* @_ZZ3baziE1b,
 
   // CHECK: [[A_BUF_SIZE:%.+]] = mul nuw i64 10, [[NUM_ELEMS:%[^,]+]]