Add doInitialization/doFinalization to DataLayoutPass.

With this a DataLayoutPass can be reused for multiple modules.

Once we have doInitialization/doFinalization, it doesn't seem necessary to pass
a Module to the constructor.

Overall this change seems in line with the idea of making DataLayout a required
part of Module. With it the only way of having a DataLayout used is to add it
to the Module.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217548 91177308-0d34-0410-b5e6-96231b3b80d8

examples/ExceptionDemo/ExceptionDemo.cpp

@@ -1977,7 +1977,7 @@ int main(int argc, char *argv[]) {
     // Start with registering info about how the
     // target lays out data structures.
     module->setDataLayout(executionEngine->getDataLayout());
-    fpm.add(new llvm::DataLayoutPass(module));
+    fpm.add(new llvm::DataLayoutPass());
 
     // Optimizations turned on
 #ifdef ADD_OPT_PASSES

examples/Kaleidoscope/Chapter4/toy.cpp

@@ -588,7 +588,7 @@ int main() {
   // Set up the optimizer pipeline.  Start with registering info about how the
   // target lays out data structures.
   TheModule->setDataLayout(TheExecutionEngine->getDataLayout());
-  OurFPM.add(new DataLayoutPass(TheModule));
+  OurFPM.add(new DataLayoutPass());
   // Provide basic AliasAnalysis support for GVN.
   OurFPM.add(createBasicAliasAnalysisPass());
   // Do simple "peephole" optimizations and bit-twiddling optzns.

examples/Kaleidoscope/Chapter5/toy.cpp

@@ -833,7 +833,7 @@ int main() {
   // Set up the optimizer pipeline.  Start with registering info about how the
   // target lays out data structures.
   TheModule->setDataLayout(TheExecutionEngine->getDataLayout());
-  OurFPM.add(new DataLayoutPass(TheModule));
+  OurFPM.add(new DataLayoutPass());
   // Provide basic AliasAnalysis support for GVN.
   OurFPM.add(createBasicAliasAnalysisPass());
   // Do simple "peephole" optimizations and bit-twiddling optzns.

examples/Kaleidoscope/Chapter6/toy.cpp

@@ -951,7 +951,7 @@ int main() {
   // Set up the optimizer pipeline.  Start with registering info about how the
   // target lays out data structures.
   TheModule->setDataLayout(TheExecutionEngine->getDataLayout());
-  OurFPM.add(new DataLayoutPass(TheModule));
+  OurFPM.add(new DataLayoutPass());
   // Provide basic AliasAnalysis support for GVN.
   OurFPM.add(createBasicAliasAnalysisPass());
   // Do simple "peephole" optimizations and bit-twiddling optzns.

examples/Kaleidoscope/Chapter7/toy.cpp

@@ -1115,7 +1115,7 @@ int main() {
   // Set up the optimizer pipeline.  Start with registering info about how the
   // target lays out data structures.
   TheModule->setDataLayout(TheExecutionEngine->getDataLayout());
-  OurFPM.add(new DataLayoutPass(TheModule));
+  OurFPM.add(new DataLayoutPass());
   // Provide basic AliasAnalysis support for GVN.
   OurFPM.add(createBasicAliasAnalysisPass());
   // Promote allocas to registers.

include/llvm/IR/DataLayout.h

@@ -184,6 +184,8 @@ public:
   /// Initialize target data from properties stored in the module.
   explicit DataLayout(const Module *M);
 
+  void init(const Module *M);
+
   DataLayout(const DataLayout &DL) : LayoutMap(nullptr) { *this = DL; }
 
   DataLayout &operator=(const DataLayout &DL) {
@@ -466,13 +468,10 @@ public:
 
   const DataLayout &getDataLayout() const { return DL; }
 
-  // For use with the C API. C++ code should always use the constructor that
-  // takes a module.
-  explicit DataLayoutPass(const DataLayout &DL);
-
-  explicit DataLayoutPass(const Module *M);
-
   static char ID; // Pass identification, replacement for typeid
+
+  bool doFinalization(Module &M) override;
+  bool doInitialization(Module &M) override;
 };
 
 /// StructLayout - used to lazily calculate structure layout information for a

lib/ExecutionEngine/MCJIT/MCJIT.cpp

@@ -133,7 +133,7 @@ std::unique_ptr<ObjectBufferStream> MCJIT::emitObject(Module *M) {
   PassManager PM;
 
   M->setDataLayout(TM->getSubtargetImpl()->getDataLayout());
-  PM.add(new DataLayoutPass(M));
+  PM.add(new DataLayoutPass());
 
   // The RuntimeDyld will take ownership of this shortly
   std::unique_ptr<ObjectBufferStream> CompiledObject(new ObjectBufferStream());

lib/IR/DataLayout.cpp

@@ -345,6 +345,10 @@ void DataLayout::parseSpecifier(StringRef Desc) {
 }
 
 DataLayout::DataLayout(const Module *M) : LayoutMap(nullptr) {
+  init(M);
+}
+
+void DataLayout::init(const Module *M) {
   const DataLayout *Other = M->getDataLayout();
   if (Other)
     *this = *Other;
@@ -796,17 +800,17 @@ unsigned DataLayout::getPreferredAlignmentLog(const GlobalVariable *GV) const {
 }
 
 DataLayoutPass::DataLayoutPass() : ImmutablePass(ID), DL("") {
-  report_fatal_error("Bad DataLayoutPass ctor used. Tool did not specify a "
-                     "DataLayout to use?");
+  initializeDataLayoutPassPass(*PassRegistry::getPassRegistry());
 }
 
 DataLayoutPass::~DataLayoutPass() {}
 
-DataLayoutPass::DataLayoutPass(const DataLayout &DL)
-    : ImmutablePass(ID), DL(DL) {
-  initializeDataLayoutPassPass(*PassRegistry::getPassRegistry());
+bool DataLayoutPass::doInitialization(Module &M) {
+  DL.init(&M);
+  return false;
 }
 
-DataLayoutPass::DataLayoutPass(const Module *M) : ImmutablePass(ID), DL(M) {
-  initializeDataLayoutPassPass(*PassRegistry::getPassRegistry());
+bool DataLayoutPass::doFinalization(Module &M) {
+  DL.reset("");
+  return false;
 }

lib/LTO/LTOCodeGenerator.cpp

@@ -471,7 +471,7 @@ bool LTOCodeGenerator::generateObjectFile(raw_ostream &out,
 
   PassManager codeGenPasses;
 
-  codeGenPasses.add(new DataLayoutPass(mergedModule));
+  codeGenPasses.add(new DataLayoutPass());
 
   formatted_raw_ostream Out(out);
 

lib/Target/Target.cpp

@@ -49,7 +49,7 @@ LLVMTargetDataRef LLVMCreateTargetData(const char *StringRep) {
 void LLVMAddTargetData(LLVMTargetDataRef TD, LLVMPassManagerRef PM) {
   // The DataLayoutPass must now be in sync with the module. Unfortunatelly we
   // cannot enforce that from the C api.
-  unwrap(PM)->add(new DataLayoutPass(*unwrap(TD)));
+  unwrap(PM)->add(new DataLayoutPass());
 }
 
 void LLVMAddTargetLibraryInfo(LLVMTargetLibraryInfoRef TLI,

lib/Target/TargetMachineC.cpp

@@ -198,7 +198,7 @@ static LLVMBool LLVMTargetMachineEmit(LLVMTargetMachineRef T, LLVMModuleRef M,
     return true;
   }
   Mod->setDataLayout(td);
-  pass.add(new DataLayoutPass(Mod));
+  pass.add(new DataLayoutPass());
 
   TargetMachine::CodeGenFileType ft;
   switch (codegen) {

lib/Transforms/IPO/PassManagerBuilder.cpp

@@ -432,8 +432,7 @@ void PassManagerBuilder::addLTOOptimizationPasses(PassManagerBase &PM) {
 void PassManagerBuilder::populateLTOPassManager(PassManagerBase &PM,
                                                 TargetMachine *TM) {
   if (TM) {
-    const DataLayout *DL = TM->getSubtargetImpl()->getDataLayout();
-    PM.add(new DataLayoutPass(*DL));
+    PM.add(new DataLayoutPass());
     TM->addAnalysisPasses(PM);
   }
 

tools/gold/gold-plugin.cpp

@@ -693,7 +693,7 @@ static void codegen(Module &M) {
   runLTOPasses(M, *TM);
 
   PassManager CodeGenPasses;
-  CodeGenPasses.add(new DataLayoutPass(&M));
+  CodeGenPasses.add(new DataLayoutPass());
 
   SmallString<128> Filename;
   int FD;

tools/llc/llc.cpp

@@ -307,7 +307,7 @@ static int compileModule(char **argv, LLVMContext &Context) {
   // Add the target data from the target machine, if it exists, or the module.
   if (const DataLayout *DL = Target.getSubtargetImpl()->getDataLayout())
     mod->setDataLayout(DL);
-  PM.add(new DataLayoutPass(mod));
+  PM.add(new DataLayoutPass());
 
   if (RelaxAll.getNumOccurrences() > 0 &&
       FileType != TargetMachine::CGFT_ObjectFile)

tools/llvm-extract/llvm-extract.cpp

@@ -250,7 +250,7 @@ int main(int argc, char **argv) {
   // In addition to deleting all other functions, we also want to spiff it
   // up a little bit.  Do this now.
   PassManager Passes;
-  Passes.add(new DataLayoutPass(M.get())); // Use correct DataLayout
+  Passes.add(new DataLayoutPass()); // Use correct DataLayout
 
   std::vector<GlobalValue*> Gvs(GVs.begin(), GVs.end());
 

tools/opt/opt.cpp

@@ -440,7 +440,7 @@ int main(int argc, char **argv) {
   }
 
   if (DL)
-    Passes.add(new DataLayoutPass(M.get()));
+    Passes.add(new DataLayoutPass());
 
   Triple ModuleTriple(M->getTargetTriple());
   TargetMachine *Machine = nullptr;
@@ -456,7 +456,7 @@ int main(int argc, char **argv) {
   if (OptLevelO1 || OptLevelO2 || OptLevelOs || OptLevelOz || OptLevelO3) {
     FPasses.reset(new FunctionPassManager(M.get()));
     if (DL)
-      FPasses->add(new DataLayoutPass(M.get()));
+      FPasses->add(new DataLayoutPass());
     if (TM.get())
       TM->addAnalysisPasses(*FPasses);
 

unittests/IR/LegacyPassManagerTest.cpp

@@ -303,7 +303,7 @@ namespace llvm {
       mNDM->run = mNDNM->run = mDNM->run = mNDM2->run = 0;
 
       PassManager Passes;
-      Passes.add(new DataLayoutPass(&M));
+      Passes.add(new DataLayoutPass());
       Passes.add(mNDM2);
       Passes.add(mNDM);
       Passes.add(mNDNM);
@@ -327,7 +327,7 @@ namespace llvm {
       mNDM->run = mNDNM->run = mDNM->run = mNDM2->run = 0;
 
       PassManager Passes;
-      Passes.add(new DataLayoutPass(&M));
+      Passes.add(new DataLayoutPass());
       Passes.add(mNDM);
       Passes.add(mNDNM);
       Passes.add(mNDM2);// invalidates mNDM needed by mDNM
@@ -349,7 +349,7 @@ namespace llvm {
       std::unique_ptr<Module> M(makeLLVMModule());
       T *P = new T();
       PassManager Passes;
-      Passes.add(new DataLayoutPass(M.get()));
+      Passes.add(new DataLayoutPass());
       Passes.add(P);
       Passes.run(*M);
       T::finishedOK(run);
@@ -360,7 +360,7 @@ namespace llvm {
       Module *M = makeLLVMModule();
       T *P = new T();
       PassManager Passes;
-      Passes.add(new DataLayoutPass(M));
+      Passes.add(new DataLayoutPass());
       Passes.add(P);
       Passes.run(*M);
       T::finishedOK(run, N);
@@ -398,7 +398,7 @@ namespace llvm {
         SCOPED_TRACE("Running OnTheFlyTest");
         struct OnTheFlyTest *O = new OnTheFlyTest();
         PassManager Passes;
-        Passes.add(new DataLayoutPass(M));
+        Passes.add(new DataLayoutPass());
         Passes.add(O);
         Passes.run(*M);