[NewPM] Use a separate struct for ModuleThreadSanitizerPass

Split ThreadSanitizerPass into ThreadSanitizerPass (as a function
pass) and ModuleThreadSanitizerPass (as a module pass).
Main reason is to make sure that we have a unique mapping from
ClassName to PassName in the new passmanager framework, making it
possible to correctly identify the passes when dealing with options
such as -print-after and -print-pipeline-passes.

This is a follow-up to D105006 and D105007.

Author: bjope

clang/lib/CodeGen/BackendUtil.cpp

@@ -1142,7 +1142,7 @@ static void addSanitizers(const Triple &TargetTriple,
     MSanPass(SanitizerKind::KernelMemory, true);
 
     if (LangOpts.Sanitize.has(SanitizerKind::Thread)) {
-      MPM.addPass(ThreadSanitizerPass());
+      MPM.addPass(ModuleThreadSanitizerPass());
       MPM.addPass(createModuleToFunctionPassAdaptor(ThreadSanitizerPass()));
     }
 

llvm/include/llvm/Transforms/Instrumentation/ThreadSanitizer.h

@@ -27,6 +27,14 @@ FunctionPass *createThreadSanitizerLegacyPassPass();
 /// yet, the pass inserts the declarations. Otherwise the existing globals are
 struct ThreadSanitizerPass : public PassInfoMixin<ThreadSanitizerPass> {
   PreservedAnalyses run(Function &F, FunctionAnalysisManager &FAM);
+  static bool isRequired() { return true; }
+};
+
+/// A module pass for tsan instrumentation.
+///
+/// Create ctor and init functions.
+struct ModuleThreadSanitizerPass
+  : public PassInfoMixin<ModuleThreadSanitizerPass> {
   PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
   static bool isRequired() { return true; }
 };

llvm/lib/Passes/PassRegistry.def

@@ -111,7 +111,7 @@ MODULE_PASS("wholeprogramdevirt", WholeProgramDevirtPass())
 MODULE_PASS("dfsan", DataFlowSanitizerPass())
 MODULE_PASS("asan-module", ModuleAddressSanitizerPass(/*CompileKernel=*/false, false, true, false))
 MODULE_PASS("msan-module", ModuleMemorySanitizerPass({}))
-MODULE_PASS("tsan-module", ThreadSanitizerPass())
+MODULE_PASS("tsan-module", ModuleThreadSanitizerPass())
 MODULE_PASS("kasan-module", ModuleAddressSanitizerPass(/*CompileKernel=*/true, false, true, false))
 MODULE_PASS("sancov-module", ModuleSanitizerCoveragePass())
 MODULE_PASS("memprof-module", ModuleMemProfilerPass())

llvm/lib/Transforms/Instrumentation/ThreadSanitizer.cpp

@@ -206,8 +206,8 @@ PreservedAnalyses ThreadSanitizerPass::run(Function &F,
   return PreservedAnalyses::all();
 }
 
-PreservedAnalyses ThreadSanitizerPass::run(Module &M,
-                                           ModuleAnalysisManager &MAM) {
+PreservedAnalyses ModuleThreadSanitizerPass::run(Module &M,
+                                                 ModuleAnalysisManager &MAM) {
   insertModuleCtor(M);
   return PreservedAnalyses::none();
 }