diff --git a/include/llvm/InitializePasses.h b/include/llvm/InitializePasses.h
index 293f37e..24de5cb 100644
--- a/include/llvm/InitializePasses.h
+++ b/include/llvm/InitializePasses.h
@@ -391,7 +391,7 @@
 void initializeTargetLibraryInfoWrapperPassPass(PassRegistry&);
 void initializeTargetPassConfigPass(PassRegistry&);
 void initializeTargetTransformInfoWrapperPassPass(PassRegistry&);
-void initializeThreadSanitizerPass(PassRegistry&);
+void initializeThreadSanitizerLegacyPassPass(PassRegistry&);
 void initializeTwoAddressInstructionPassPass(PassRegistry&);
 void initializeTypeBasedAAWrapperPassPass(PassRegistry&);
 void initializeUnifyFunctionExitNodesPass(PassRegistry&);
diff --git a/include/llvm/Transforms/Instrumentation.h b/include/llvm/Transforms/Instrumentation.h
index 34b5207..017cab0 100644
--- a/include/llvm/Transforms/Instrumentation.h
+++ b/include/llvm/Transforms/Instrumentation.h
@@ -155,9 +155,6 @@
 FunctionPass *createHWAddressSanitizerPass(bool CompileKernel = false,
                                            bool Recover = false);
 
-// Insert ThreadSanitizer (race detection) instrumentation
-FunctionPass *createThreadSanitizerPass();
-
 // Insert DataFlowSanitizer (dynamic data flow analysis) instrumentation
 ModulePass *createDataFlowSanitizerPass(
     const std::vector<std::string> &ABIListFiles = std::vector<std::string>(),
diff --git a/include/llvm/Transforms/Instrumentation/ThreadSanitizer.h b/include/llvm/Transforms/Instrumentation/ThreadSanitizer.h
new file mode 100644
index 0000000..56874e3
--- /dev/null
+++ b/include/llvm/Transforms/Instrumentation/ThreadSanitizer.h
@@ -0,0 +1,19 @@
+#ifndef LLVM_TRANSFORMS_INSTRUMENTATION_THREADSANITIZER_H
+#define LLVM_TRANSFORMS_INSTRUMENTATION_THREADSANITIZER_H
+
+#include "llvm/IR/PassManager.h"
+
+namespace llvm {
+// Insert ThreadSanitizer (race detection) instrumentation
+FunctionPass *createThreadSanitizerLegacyPassPass();
+
+/// A function pass for tsan instrumentation.
+///
+/// Instruments functions to detect race conditions reads. This function pass
+/// inserts calls to runtime library functions. If the functions aren't declared
+/// yet, the pass inserts the declarations. Otherwise the existing globals are
+struct ThreadSanitizerPass : public PassInfoMixin<ThreadSanitizerPass> {
+  PreservedAnalyses run(Function &F, FunctionAnalysisManager &FAM);
+};
+}
+#endif /* LLVM_TRANSFORMS_INSTRUMENTATION_THREADSANITIZER_H */
diff --git a/lib/Passes/PassBuilder.cpp b/lib/Passes/PassBuilder.cpp
index e1d0a47..61b16f1 100644
--- a/lib/Passes/PassBuilder.cpp
+++ b/lib/Passes/PassBuilder.cpp
@@ -95,6 +95,7 @@
 #include "llvm/Transforms/Instrumentation/GCOVProfiler.h"
 #include "llvm/Transforms/Instrumentation/InstrProfiling.h"
 #include "llvm/Transforms/Instrumentation/MemorySanitizer.h"
+#include "llvm/Transforms/Instrumentation/ThreadSanitizer.h"
 #include "llvm/Transforms/Instrumentation/PGOInstrumentation.h"
 #include "llvm/Transforms/Scalar/ADCE.h"
 #include "llvm/Transforms/Scalar/AlignmentFromAssumptions.h"
diff --git a/lib/Passes/PassRegistry.def b/lib/Passes/PassRegistry.def
index a8c03ad..b1b7abe 100644
--- a/lib/Passes/PassRegistry.def
+++ b/lib/Passes/PassRegistry.def
@@ -234,6 +234,7 @@
 FUNCTION_PASS("view-cfg-only", CFGOnlyViewerPass())
 FUNCTION_PASS("transform-warning", WarnMissedTransformationsPass())
 FUNCTION_PASS("msan", MemorySanitizerPass())
+FUNCTION_PASS("tsan", ThreadSanitizerPass())
 #undef FUNCTION_PASS
 
 #ifndef LOOP_ANALYSIS
diff --git a/lib/Transforms/Instrumentation/Instrumentation.cpp b/lib/Transforms/Instrumentation/Instrumentation.cpp
index 5828019..c3e3236 100644
--- a/lib/Transforms/Instrumentation/Instrumentation.cpp
+++ b/lib/Transforms/Instrumentation/Instrumentation.cpp
@@ -113,7 +113,7 @@
   initializeInstrProfilingLegacyPassPass(Registry);
   initializeMemorySanitizerLegacyPassPass(Registry);
   initializeHWAddressSanitizerPass(Registry);
-  initializeThreadSanitizerPass(Registry);
+  initializeThreadSanitizerLegacyPassPass(Registry);
   initializeSanitizerCoverageModulePass(Registry);
   initializeDataFlowSanitizerPass(Registry);
   initializeEfficiencySanitizerPass(Registry);
diff --git a/lib/Transforms/Instrumentation/ThreadSanitizer.cpp b/lib/Transforms/Instrumentation/ThreadSanitizer.cpp
index fa1e5a1..7d535db 100644
--- a/lib/Transforms/Instrumentation/ThreadSanitizer.cpp
+++ b/lib/Transforms/Instrumentation/ThreadSanitizer.cpp
@@ -19,6 +19,7 @@
 // The rest is handled by the run-time library.
 //===----------------------------------------------------------------------===//
 
+#include "llvm/Transforms/Instrumentation/ThreadSanitizer.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/SmallVector.h"
@@ -80,21 +81,21 @@
 STATISTIC(NumOmittedReadsFromVtable, "Number of vtable reads");
 STATISTIC(NumOmittedNonCaptured, "Number of accesses ignored due to capturing");
 
-static const char *const kTsanModuleCtorName = "tsan.module_ctor";
 static const char *const kTsanInitName = "__tsan_init";
 
 namespace {
 
 /// ThreadSanitizer: instrument the code in module to find races.
-struct ThreadSanitizer : public FunctionPass {
-  ThreadSanitizer() : FunctionPass(ID) {}
-  StringRef getPassName() const override;
-  void getAnalysisUsage(AnalysisUsage &AU) const override;
-  bool runOnFunction(Function &F) override;
-  bool doInitialization(Module &M) override;
-  static char ID;  // Pass identification, replacement for typeid.
+///
+/// Instantiating ThreadSanitizer inserts the msan runtime library API function
+/// declarations into the module if they don't exist already. Instantiating
+/// ensures the __tsan_init function is in the list of global constructors for
+/// the module.
+struct ThreadSanitizer {
+  ThreadSanitizer(Module &M);
+  bool sanitizeFunction(Function &F, const TargetLibraryInfo &TLI);
 
- private:
+private:
   void initializeCallbacks(Module &M);
   bool instrumentLoadOrStore(Instruction *I, const DataLayout &DL);
   bool instrumentAtomic(Instruction *I, const DataLayout &DL);
@@ -128,29 +129,56 @@
   Function *TsanVptrUpdate;
   Function *TsanVptrLoad;
   Function *MemmoveFn, *MemcpyFn, *MemsetFn;
-  Function *TsanCtorFunction;
+};
+
+struct ThreadSanitizerLegacyPass : FunctionPass {
+  ThreadSanitizerLegacyPass() : FunctionPass(ID) {}
+  StringRef getPassName() const override;
+  void getAnalysisUsage(AnalysisUsage &AU) const override;
+  bool runOnFunction(Function &F) override;
+  bool doInitialization(Module &M) override;
+  static char ID; // Pass identification, replacement for typeid.
+private:
+  Optional<ThreadSanitizer> TSan;
 };
 }  // namespace
 
-char ThreadSanitizer::ID = 0;
-INITIALIZE_PASS_BEGIN(
-    ThreadSanitizer, "tsan",
-    "ThreadSanitizer: detects data races.",
-    false, false)
+PreservedAnalyses ThreadSanitizerPass::run(Function &F,
+                                           FunctionAnalysisManager &FAM) {
+  ThreadSanitizer TSan(*F.getParent());
+  if (TSan.sanitizeFunction(F, FAM.getResult<TargetLibraryAnalysis>(F)))
+    return PreservedAnalyses::none();
+  return PreservedAnalyses::all();
+}
+
+char ThreadSanitizerLegacyPass::ID = 0;
+INITIALIZE_PASS_BEGIN(ThreadSanitizerLegacyPass, "tsan",
+                      "ThreadSanitizer: detects data races.", false, false)
 INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass)
-INITIALIZE_PASS_END(
-    ThreadSanitizer, "tsan",
-    "ThreadSanitizer: detects data races.",
-    false, false)
+INITIALIZE_PASS_END(ThreadSanitizerLegacyPass, "tsan",
+                    "ThreadSanitizer: detects data races.", false, false)
 
-StringRef ThreadSanitizer::getPassName() const { return "ThreadSanitizer"; }
+StringRef ThreadSanitizerLegacyPass::getPassName() const {
+  return "ThreadSanitizerLegacyPass";
+}
 
-void ThreadSanitizer::getAnalysisUsage(AnalysisUsage &AU) const {
+void ThreadSanitizerLegacyPass::getAnalysisUsage(AnalysisUsage &AU) const {
   AU.addRequired<TargetLibraryInfoWrapperPass>();
 }
 
-FunctionPass *llvm::createThreadSanitizerPass() {
-  return new ThreadSanitizer();
+bool ThreadSanitizerLegacyPass::doInitialization(Module &M) {
+  TSan.emplace(M);
+  return true;
+}
+
+bool ThreadSanitizerLegacyPass::runOnFunction(Function &F) {
+  auto &TLI = getAnalysis<TargetLibraryInfoWrapperPass>().getTLI();
+  TSan->sanitizeFunction(F, TLI);
+  return true;
+}
+
+FunctionPass *llvm::createThreadSanitizerLegacyPassPass() {
+  return new ThreadSanitizerLegacyPass();
 }
 
 void ThreadSanitizer::initializeCallbacks(Module &M) {
@@ -252,16 +280,10 @@
                             IRB.getInt32Ty(), IntptrTy));
 }
 
-bool ThreadSanitizer::doInitialization(Module &M) {
+ThreadSanitizer::ThreadSanitizer(Module &M) {
   const DataLayout &DL = M.getDataLayout();
   IntptrTy = DL.getIntPtrType(M.getContext());
-  std::tie(TsanCtorFunction, std::ignore) = createSanitizerCtorAndInitFunctions(
-      M, kTsanModuleCtorName, kTsanInitName, /*InitArgTypes=*/{},
-      /*InitArgs=*/{});
-
-  appendToGlobalCtors(M, TsanCtorFunction, 0);
-
-  return true;
+  getOrCreateInitFunction(M, kTsanInitName);
 }
 
 static bool isVtableAccess(Instruction *I) {
@@ -402,11 +424,8 @@
   }
 }
 
-bool ThreadSanitizer::runOnFunction(Function &F) {
-  // This is required to prevent instrumenting call to __tsan_init from within
-  // the module constructor.
-  if (&F == TsanCtorFunction)
-    return false;
+bool ThreadSanitizer::sanitizeFunction(Function &F,
+                                       const TargetLibraryInfo &TLI) {
   initializeCallbacks(*F.getParent());
   SmallVector<Instruction*, 8> AllLoadsAndStores;
   SmallVector<Instruction*, 8> LocalLoadsAndStores;
@@ -416,8 +435,6 @@
   bool HasCalls = false;
   bool SanitizeFunction = F.hasFnAttribute(Attribute::SanitizeThread);
   const DataLayout &DL = F.getParent()->getDataLayout();
-  const TargetLibraryInfo *TLI =
-      &getAnalysis<TargetLibraryInfoWrapperPass>().getTLI();
 
   // Traverse all instructions, collect loads/stores/returns, check for calls.
   for (auto &BB : F) {
@@ -428,7 +445,7 @@
         LocalLoadsAndStores.push_back(&Inst);
       else if (isa<CallInst>(Inst) || isa<InvokeInst>(Inst)) {
         if (CallInst *CI = dyn_cast<CallInst>(&Inst))
-          maybeMarkSanitizerLibraryCallNoBuiltin(CI, TLI);
+          maybeMarkSanitizerLibraryCallNoBuiltin(CI, &TLI);
         if (isa<MemIntrinsic>(Inst))
           MemIntrinCalls.push_back(&Inst);
         HasCalls = true;
diff --git a/test/Instrumentation/ThreadSanitizer/tsan_basic.ll b/test/Instrumentation/ThreadSanitizer/tsan_basic.ll
index 69d4117..cce7f46 100644
--- a/test/Instrumentation/ThreadSanitizer/tsan_basic.ll
+++ b/test/Instrumentation/ThreadSanitizer/tsan_basic.ll
@@ -1,4 +1,5 @@
 ; RUN: opt < %s -tsan -S | FileCheck %s
+; RUN: opt < %s -passes=tsan -S | FileCheck %s
 
 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
 target triple = "x86_64-unknown-linux-gnu"
@@ -9,7 +10,7 @@
   ret i32 %tmp1
 }
 
-; CHECK: @llvm.global_ctors = {{.*}}@tsan.module_ctor
+; CHECK: @llvm.global_ctors = {{.*}}@__tsan_init
 
 ; CHECK: define i32 @read_4_bytes(i32* %a)
 ; CHECK:        call void @__tsan_func_entry(i8* %0)
@@ -77,6 +78,3 @@
   call void @SwiftError(i8** %0)
   ret void
 }
-
-; CHECK: define internal void @tsan.module_ctor()
-; CHECK: call void @__tsan_init()