Index: clang/lib/Sema/Sema.cpp
===================================================================
--- clang/lib/Sema/Sema.cpp
+++ clang/lib/Sema/Sema.cpp
@@ -981,6 +981,14 @@
                                  LateParsedInstantiations.begin(),
                                  LateParsedInstantiations.end());
     LateParsedInstantiations.clear();
+
+    // FIXME: Instantiating implicit templates already in the PCH breaks some
+    // OpenMP-specific code paths, see https://reviews.llvm.org/D69585 .
+    if (!LangOpts.OpenMP) {
+      llvm::TimeTraceScope TimeScope("PerformPendingInstantiations",
+                                     StringRef(""));
+      PerformPendingInstantiations();
+    }
   }
 
   DiagnoseUnterminatedPragmaPack();
Index: clang/test/CodeGenCXX/vla-lambda-capturing.cpp
===================================================================
--- clang/test/CodeGenCXX/vla-lambda-capturing.cpp
+++ clang/test/CodeGenCXX/vla-lambda-capturing.cpp
@@ -1,6 +1,6 @@
-// RUN: %clang_cc1 %s -std=c++11 -emit-llvm -o - | FileCheck %s
+// RUN: %clang_cc1 %s -std=c++11 -emit-llvm -o - | FileCheck --check-prefixes CHECK,CHECK-NOPCH %s
 // RUN: %clang_cc1 %s -std=c++11 -emit-pch -o %t
-// RUN: %clang_cc1 %s -std=c++11 -include-pch %t -emit-llvm -o - | FileCheck %s
+// RUN: %clang_cc1 %s -std=c++11 -include-pch %t -emit-llvm -o - | FileCheck --check-prefixes CHECK,CHECK-PCH %s
 
 #ifndef HEADER
 #define HEADER
@@ -111,14 +111,14 @@
 // CHECK: call void @llvm.stackrestore(
 // CHECK: ret void
 
-// CHECK: define linkonce_odr{{.*}} void [[F_INT_LAMBDA]]([[CAP_TYPE2]]*
-// CHECK: [[THIS:%.+]] = load [[CAP_TYPE2]]*, [[CAP_TYPE2]]**
-// CHECK: [[SIZE_REF:%.+]] = getelementptr inbounds [[CAP_TYPE2]], [[CAP_TYPE2]]* [[THIS]], i{{.+}} 0, i{{.+}} 0
-// CHECK: [[SIZE:%.+]] = load [[INTPTR_T]], [[INTPTR_T]]* [[SIZE_REF]]
-// CHECK: call i{{.+}}* @llvm.stacksave()
-// CHECK: alloca [[INTPTR_T]], [[INTPTR_T]] [[SIZE]]
-// CHECK: call void @llvm.stackrestore(
-// CHECK: ret void
+// CHECK-NOPCH: define linkonce_odr{{.*}} void [[F_INT_LAMBDA]]([[CAP_TYPE2]]*
+// CHECK-NOPCH: [[THIS:%.+]] = load [[CAP_TYPE2]]*, [[CAP_TYPE2]]**
+// CHECK-NOPCH: [[SIZE_REF:%.+]] = getelementptr inbounds [[CAP_TYPE2]], [[CAP_TYPE2]]* [[THIS]], i{{.+}} 0, i{{.+}} 0
+// CHECK-NOPCH: [[SIZE:%.+]] = load [[INTPTR_T]], [[INTPTR_T]]* [[SIZE_REF]]
+// CHECK-NOPCH: call i{{.+}}* @llvm.stacksave()
+// CHECK-NOPCH: alloca [[INTPTR_T]], [[INTPTR_T]] [[SIZE]]
+// CHECK-NOPCH: call void @llvm.stackrestore(
+// CHECK-NOPCH: ret void
 
 // CHECK: define linkonce_odr{{.*}} void [[B_INT_LAMBDA]]([[CAP_TYPE3]]*
 // CHECK: [[SIZE2_REF:%.+]] = getelementptr inbounds [[CAP_TYPE3]], [[CAP_TYPE3]]* [[THIS:%.+]], i{{[0-9]+}} 0, i{{[0-9]+}} 1
@@ -168,4 +168,14 @@
 // CHECK: [[MUL:%.+]] = mul {{.*}} i{{[0-9]+}} [[SIZE2]], [[SIZE1]]
 // CHECK: mul {{.*}} i{{[0-9]+}} {{[0-9]+}}, [[MUL]]
 // CHECK: ret void
+
+// CHECK-PCH: define linkonce_odr{{.*}} void [[F_INT_LAMBDA]]([[CAP_TYPE2]]*
+// CHECK-PCH: [[THIS:%.+]] = load [[CAP_TYPE2]]*, [[CAP_TYPE2]]**
+// CHECK-PCH: [[SIZE_REF:%.+]] = getelementptr inbounds [[CAP_TYPE2]], [[CAP_TYPE2]]* [[THIS]], i{{.+}} 0, i{{.+}} 0
+// CHECK-PCH: [[SIZE:%.+]] = load [[INTPTR_T]], [[INTPTR_T]]* [[SIZE_REF]]
+// CHECK-PCH: call i{{.+}}* @llvm.stacksave()
+// CHECK-PCH: alloca [[INTPTR_T]], [[INTPTR_T]] [[SIZE]]
+// CHECK-PCH: call void @llvm.stackrestore(
+// CHECK-PCH: ret void
+
 #endif