diff --git a/clang/lib/CodeGen/BackendUtil.cpp b/clang/lib/CodeGen/BackendUtil.cpp
--- a/clang/lib/CodeGen/BackendUtil.cpp
+++ b/clang/lib/CodeGen/BackendUtil.cpp
@@ -1269,17 +1269,25 @@
             });
       }
 
-      if (LangOpts.Sanitize.has(SanitizerKind::Memory)) {
-        int TrackOrigins = CodeGenOpts.SanitizeMemoryTrackOrigins;
-        bool Recover = CodeGenOpts.SanitizeRecover.has(SanitizerKind::Memory);
-        PB.registerOptimizerLastEPCallback(
-            [TrackOrigins, Recover](ModulePassManager &MPM,
-                                    PassBuilder::OptimizationLevel Level) {
-              MPM.addPass(MemorySanitizerPass({TrackOrigins, Recover, false}));
-              MPM.addPass(createModuleToFunctionPassAdaptor(
-                  MemorySanitizerPass({TrackOrigins, Recover, false})));
-            });
-      }
+      auto MSanPass = [&](SanitizerMask Mask, bool CompileKernel) {
+        if (LangOpts.Sanitize.has(Mask)) {
+          int TrackOrigins = CodeGenOpts.SanitizeMemoryTrackOrigins;
+          bool Recover = CodeGenOpts.SanitizeRecover.has(Mask);
+          PB.registerOptimizerLastEPCallback(
+              [CompileKernel, TrackOrigins,
+               Recover](ModulePassManager &MPM,
+                        PassBuilder::OptimizationLevel Level) {
+                MPM.addPass(MemorySanitizerPass(
+                    {TrackOrigins, Recover, CompileKernel}));
+                MPM.addPass(
+                    createModuleToFunctionPassAdaptor(MemorySanitizerPass(
+                        {TrackOrigins, Recover, CompileKernel})));
+              });
+        }
+      };
+      MSanPass(SanitizerKind::Memory, false);
+      MSanPass(SanitizerKind::KernelMemory, true);
+
       if (LangOpts.Sanitize.has(SanitizerKind::Thread)) {
         PB.registerOptimizerLastEPCallback(
             [](ModulePassManager &MPM, PassBuilder::OptimizationLevel Level) {
diff --git a/clang/test/Driver/msan.c b/clang/test/Driver/msan.c
--- a/clang/test/Driver/msan.c
+++ b/clang/test/Driver/msan.c
@@ -1,50 +1,49 @@
 // REQUIRES: x86-registered-target
 
-// RUN: %clang     -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-MSAN
-// RUN: %clang -O1 -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-MSAN
-// RUN: %clang -O2 -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-MSAN
-// RUN: %clang -O3 -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-MSAN
-// RUN: %clang     -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -flto=thin -o - | FileCheck %s --check-prefix=CHECK-MSAN
-// RUN: %clang -O2 -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -flto=thin -o - | FileCheck %s --check-prefix=CHECK-MSAN
-// RUN: %clang     -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -flto -o - | FileCheck %s --check-prefix=CHECK-MSAN
-// RUN: %clang -O2 -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -flto -o - | FileCheck %s --check-prefix=CHECK-MSAN
+// RUN: %clang     -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s
+// RUN: %clang -O1 -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s
+// RUN: %clang -O2 -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s
+// RUN: %clang -O3 -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s
+// RUN: %clang     -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -flto=thin -o - | FileCheck %s
+// RUN: %clang -O2 -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -flto=thin -o - | FileCheck %s
+// RUN: %clang     -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -flto -o - | FileCheck %s
+// RUN: %clang -O2 -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -flto -o - | FileCheck %s
 
-// RUN: %clang     -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-KMSAN
-// RUN: %clang -O1 -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-KMSAN
-// RUN: %clang -O2 -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-KMSAN
-// RUN: %clang -O3 -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-KMSAN
-// RUN: %clang     -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -flto=thin -o - | FileCheck %s --check-prefix=CHECK-KMSAN
-// RUN: %clang -O2 -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -flto=thin -o - | FileCheck %s --check-prefix=CHECK-KMSAN
-// RUN: %clang     -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -flto -o - | FileCheck %s --check-prefix=CHECK-KMSAN
-// RUN: %clang -O2 -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -flto -o - | FileCheck %s --check-prefix=CHECK-KMSAN
+// RUN: %clang     -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -o - | FileCheck %s
+// RUN: %clang -O1 -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -o - | FileCheck %s
+// RUN: %clang -O2 -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -o - | FileCheck %s
+// RUN: %clang -O3 -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -o - | FileCheck %s
+// RUN: %clang     -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -flto=thin -o - | FileCheck %s
+// RUN: %clang -O2 -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -flto=thin -o - | FileCheck %s
+// RUN: %clang     -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -flto -o - | FileCheck %s
+// RUN: %clang -O2 -fno-experimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -flto -o - | FileCheck %s
 
-// RUN: %clang -target mips64-linux-gnu -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-MSAN
-// RUN: %clang -target mips64el-unknown-linux-gnu -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-MSAN
-// RUN: %clang -target powerpc64-unknown-linux-gnu -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-MSAN
-// RUN: %clang -target powerpc64le-unknown-linux-gnu -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-MSAN
+// RUN: %clang -target mips64-linux-gnu -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s
+// RUN: %clang -target mips64el-unknown-linux-gnu -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s
+// RUN: %clang -target powerpc64-unknown-linux-gnu -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s
+// RUN: %clang -target powerpc64le-unknown-linux-gnu -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s
 
 // Verify that -fsanitize=memory and -fsanitize=kernel-memory invoke MSan/KMSAN instrumentation.
 
 // Also check that this works with the new pass manager with and without
 // optimization
-// RUN: %clang     -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-MSAN
-// RUN: %clang -O1 -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-MSAN
-// RUN: %clang -O2 -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-MSAN
-// RUN: %clang -O3 -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-MSAN
-// RUN: %clang     -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -flto=thin -o - | FileCheck %s --check-prefix=CHECK-MSAN
-// FIX: %clang -O2 -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -flto=thin -o - | FileCheck %s --check-prefix=CHECK-MSAN
-// RUN: %clang     -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -flto -o - | FileCheck %s --check-prefix=CHECK-MSAN
-// RUN: %clang -O2 -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -flto -o - | FileCheck %s --check-prefix=CHECK-MSAN
+// RUN: %clang     -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s
+// RUN: %clang -O1 -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s
+// RUN: %clang -O2 -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s
+// RUN: %clang -O3 -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -o - | FileCheck %s
+// RUN: %clang     -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -flto=thin -o - | FileCheck %s
+// FIX: %clang -O2 -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -flto=thin -o - | FileCheck %s
+// RUN: %clang     -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -flto -o - | FileCheck %s
+// RUN: %clang -O2 -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=memory %s -S -emit-llvm -flto -o - | FileCheck %s
 
-// FIX: %clang     -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory  %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-KMSAN
-// FIX: %clang -O1 -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory  %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-KMSAN
-// FIX: %clang -O2 -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory  %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-KMSAN
-// FIX: %clang -O3 -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory  %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-KMSAN
-// FIX: %clang     -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -flto=thin -o - | FileCheck %s --check-prefix=CHECK-KMSAN
-// FIX: %clang -O2 -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -flto=thin -o - | FileCheck %s --check-prefix=CHECK-KMSAN
-// FIX: %clang     -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -flto -o - | FileCheck %s --check-prefix=CHECK-KMSAN
-// FIX: %clang -O2 -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -flto -o - | FileCheck %s --check-prefix=CHECK-KMSAN
+// RUN: %clang     -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory  %s -S -emit-llvm -o - | FileCheck %s
+// RUN: %clang -O1 -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory  %s -S -emit-llvm -o - | FileCheck %s
+// RUN: %clang -O2 -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory  %s -S -emit-llvm -o - | FileCheck %s
+// RUN: %clang -O3 -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory  %s -S -emit-llvm -o - | FileCheck %s
+// RUN: %clang     -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -flto=thin -o - | FileCheck %s
+// FIX: %clang -O2 -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -flto=thin -o - | FileCheck %s
+// RUN: %clang     -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -flto -o - | FileCheck %s
+// RUN: %clang -O2 -fexperimental-new-pass-manager -target x86_64-unknown-linux -fsanitize=kernel-memory %s -S -emit-llvm -flto -o - | FileCheck %s
 
 int foo(int *a) { return *a; }
-// CHECK-MSAN: __msan_init
-// CHECK-KMSAN: __msan_get_context_state
+// CHECK: @__msan_