Use DataLayout from the module when easily available.

Eventually DataLayoutPass should go away, but for now that is the only easy
way to get a DataLayout in some APIs. This patch only changes the ones that
have easy access to a Module.

One interesting issue with sometimes using DataLayoutPass and sometimes
fetching it from the Module is that we have to make sure they are equivalent.
We can get most of the way there by always constructing the pass with a Module.
In fact, the pass could be changed to point to an external DataLayout instead
of owning one to make this stricter.

Unfortunately, the C api passes a DataLayout, so it has to be up to the caller
to make sure the pass and the module are in sync.

llvm-svn: 202204

llvm/examples/ExceptionDemo/ExceptionDemo.cpp

@@ -1976,7 +1976,8 @@ int main(int argc, char *argv[]) {
     // Set up the optimizer pipeline.
     // Start with registering info about how the
     // target lays out data structures.
-    fpm.add(new llvm::DataLayoutPass(*executionEngine->getDataLayout()));
+    module->setDataLayout(executionEngine->getDataLayout());
+    fpm.add(new llvm::DataLayoutPass(module));
 
     // Optimizations turned on
 #ifdef ADD_OPT_PASSES

llvm/examples/Kaleidoscope/Chapter4/toy.cpp

@@ -586,7 +586,8 @@ int main() {
 
   // Set up the optimizer pipeline.  Start with registering info about how the
   // target lays out data structures.
-  OurFPM.add(new DataLayoutPass(*TheExecutionEngine->getDataLayout()));
+  TheModule->setDataLayout(TheExecutionEngine->getDataLayout());
+  OurFPM.add(new DataLayoutPass(TheModule));
   // Provide basic AliasAnalysis support for GVN.
   OurFPM.add(createBasicAliasAnalysisPass());
   // Do simple "peephole" optimizations and bit-twiddling optzns.

llvm/examples/Kaleidoscope/Chapter5/toy.cpp

@@ -831,7 +831,8 @@ int main() {
 
   // Set up the optimizer pipeline.  Start with registering info about how the
   // target lays out data structures.
-  OurFPM.add(new DataLayoutPass(*TheExecutionEngine->getDataLayout()));
+  TheModule->setDataLayout(TheExecutionEngine->getDataLayout());
+  OurFPM.add(new DataLayoutPass(TheModule));
   // Provide basic AliasAnalysis support for GVN.
   OurFPM.add(createBasicAliasAnalysisPass());
   // Do simple "peephole" optimizations and bit-twiddling optzns.

llvm/examples/Kaleidoscope/Chapter6/toy.cpp

@@ -949,7 +949,8 @@ int main() {
 
   // Set up the optimizer pipeline.  Start with registering info about how the
   // target lays out data structures.
-  OurFPM.add(new DataLayoutPass(*TheExecutionEngine->getDataLayout()));
+  TheModule->setDataLayout(TheExecutionEngine->getDataLayout());
+  OurFPM.add(new DataLayoutPass(TheModule));
   // Provide basic AliasAnalysis support for GVN.
   OurFPM.add(createBasicAliasAnalysisPass());
   // Do simple "peephole" optimizations and bit-twiddling optzns.

llvm/examples/Kaleidoscope/Chapter7/toy.cpp

@@ -1113,7 +1113,8 @@ int main() {
 
   // Set up the optimizer pipeline.  Start with registering info about how the
   // target lays out data structures.
-  OurFPM.add(new DataLayoutPass(*TheExecutionEngine->getDataLayout()));
+  TheModule->setDataLayout(TheExecutionEngine->getDataLayout());
+  OurFPM.add(new DataLayoutPass(TheModule));
   // Provide basic AliasAnalysis support for GVN.
   OurFPM.add(createBasicAliasAnalysisPass());
   // Promote allocas to registers.

llvm/include/llvm/Analysis/InlineCost.h

@@ -99,7 +99,6 @@ public:
 
 /// \brief Cost analyzer used by inliner.
 class InlineCostAnalysis : public CallGraphSCCPass {
-  const DataLayout *DL;
   const TargetTransformInfo *TTI;
 
 public:

llvm/include/llvm/IR/BasicBlock.h

@@ -116,6 +116,8 @@ public:
   const Function *getParent() const { return Parent; }
         Function *getParent()       { return Parent; }
 
+  const DataLayout *getDataLayout() const;
+
   /// \brief Returns the terminator instruction if the block is well formed or
   /// null if the block is not well formed.
   TerminatorInst *getTerminator();

llvm/include/llvm/IR/DataLayout.h

@@ -460,10 +460,10 @@ 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(StringRef LayoutDescription);
-
   explicit DataLayoutPass(const Module *M);
 
   static char ID; // Pass identification, replacement for typeid

llvm/include/llvm/IR/GlobalValue.h

@@ -300,6 +300,8 @@ public:
   inline Module *getParent() { return Parent; }
   inline const Module *getParent() const { return Parent; }
 
+  const DataLayout *getDataLayout() const;
+
   // Methods for support type inquiry through isa, cast, and dyn_cast:
   static inline bool classof(const Value *V) {
     return V->getValueID() == Value::FunctionVal ||

llvm/include/llvm/IR/Instruction.h

@@ -53,6 +53,8 @@ public:
   inline const BasicBlock *getParent() const { return Parent; }
   inline       BasicBlock *getParent()       { return Parent; }
 
+  const DataLayout *getDataLayout() const;
+
   /// removeFromParent - This method unlinks 'this' from the containing basic
   /// block, but does not delete it.
   ///

llvm/lib/Analysis/IPA/InlineCost.cpp

@@ -399,6 +399,7 @@ bool CallAnalyzer::visitBitCast(BitCastInst &I) {
 }
 
 bool CallAnalyzer::visitPtrToInt(PtrToIntInst &I) {
+  const DataLayout *DL = I.getDataLayout();
   // Propagate constants through ptrtoint.
   Constant *COp = dyn_cast<Constant>(I.getOperand(0));
   if (!COp)
@@ -435,6 +436,7 @@ bool CallAnalyzer::visitPtrToInt(PtrToIntInst &I) {
 }
 
 bool CallAnalyzer::visitIntToPtr(IntToPtrInst &I) {
+  const DataLayout *DL = I.getDataLayout();
   // Propagate constants through ptrtoint.
   Constant *COp = dyn_cast<Constant>(I.getOperand(0));
   if (!COp)
@@ -1203,7 +1205,7 @@ INITIALIZE_PASS_END(InlineCostAnalysis, "inline-cost", "Inline Cost Analysis",
 
 char InlineCostAnalysis::ID = 0;
 
-InlineCostAnalysis::InlineCostAnalysis() : CallGraphSCCPass(ID), DL(0) {}
+InlineCostAnalysis::InlineCostAnalysis() : CallGraphSCCPass(ID) {}
 
 InlineCostAnalysis::~InlineCostAnalysis() {}
 
@@ -1214,8 +1216,6 @@ void InlineCostAnalysis::getAnalysisUsage(AnalysisUsage &AU) const {
 }
 
 bool InlineCostAnalysis::runOnSCC(CallGraphSCC &SCC) {
-  DataLayoutPass *DLP = getAnalysisIfAvailable<DataLayoutPass>();
-  DL = DLP ? &DLP->getDataLayout() : 0;
   TTI = &getAnalysis<TargetTransformInfo>();
   return false;
 }
@@ -1273,7 +1273,7 @@ InlineCost InlineCostAnalysis::getInlineCost(CallSite CS, Function *Callee,
   DEBUG(llvm::dbgs() << "      Analyzing call of " << Callee->getName()
         << "...\n");
 
-  CallAnalyzer CA(DL, *TTI, *Callee, Threshold);
+  CallAnalyzer CA(Callee->getDataLayout(), *TTI, *Callee, Threshold);
   bool ShouldInline = CA.analyzeCall(CS);
 
   DEBUG(CA.dump());

llvm/lib/ExecutionEngine/JIT/JIT.cpp

@@ -26,6 +26,7 @@
 #include "llvm/IR/Function.h"
 #include "llvm/IR/GlobalVariable.h"
 #include "llvm/IR/Instructions.h"
+#include "llvm/IR/Module.h"
 #include "llvm/Support/Dwarf.h"
 #include "llvm/Support/DynamicLibrary.h"
 #include "llvm/Support/ErrorHandling.h"
@@ -151,7 +152,8 @@ JIT::JIT(Module *M, TargetMachine &tm, TargetJITInfo &tji,
   // Add target data
   MutexGuard locked(lock);
   FunctionPassManager &PM = jitstate->getPM(locked);
-  PM.add(new DataLayoutPass(*TM.getDataLayout()));
+  M->setDataLayout(TM.getDataLayout());
+  PM.add(new DataLayoutPass(M));
 
   // Turn the machine code intermediate representation into bytes in memory that
   // may be executed.
@@ -183,7 +185,8 @@ void JIT::addModule(Module *M) {
     jitstate = new JITState(M);
 
     FunctionPassManager &PM = jitstate->getPM(locked);
-    PM.add(new DataLayoutPass(*TM.getDataLayout()));
+    M->setDataLayout(TM.getDataLayout());
+    PM.add(new DataLayoutPass(M));
 
     // Turn the machine code intermediate representation into bytes in memory
     // that may be executed.
@@ -214,7 +217,8 @@ bool JIT::removeModule(Module *M) {
     jitstate = new JITState(Modules[0]);
 
     FunctionPassManager &PM = jitstate->getPM(locked);
-    PM.add(new DataLayoutPass(*TM.getDataLayout()));
+    M->setDataLayout(TM.getDataLayout());
+    PM.add(new DataLayoutPass(M));
 
     // Turn the machine code intermediate representation into bytes in memory
     // that may be executed.

llvm/lib/ExecutionEngine/MCJIT/MCJIT.cpp

@@ -142,7 +142,8 @@ ObjectBufferStream* MCJIT::emitObject(Module *M) {
 
   PassManager PM;
 
-  PM.add(new DataLayoutPass(*TM->getDataLayout()));
+  M->setDataLayout(TM->getDataLayout());
+  PM.add(new DataLayoutPass(M));
 
   // The RuntimeDyld will take ownership of this shortly
   OwningPtr<ObjectBufferStream> CompiledObject(new ObjectBufferStream());

llvm/lib/IR/BasicBlock.cpp

@@ -30,6 +30,10 @@ ValueSymbolTable *BasicBlock::getValueSymbolTable() {
   return 0;
 }
 
+const DataLayout *BasicBlock::getDataLayout() const {
+  return getParent()->getDataLayout();
+}
+
 LLVMContext &BasicBlock::getContext() const {
   return getType()->getContext();
 }

llvm/lib/IR/DataLayout.cpp

@@ -786,10 +786,6 @@ DataLayoutPass::DataLayoutPass(const DataLayout &DL)
   initializeDataLayoutPassPass(*PassRegistry::getPassRegistry());
 }
 
-DataLayoutPass::DataLayoutPass(StringRef Str) : ImmutablePass(ID), DL(Str) {
-  initializeDataLayoutPassPass(*PassRegistry::getPassRegistry());
-}
-
 DataLayoutPass::DataLayoutPass(const Module *M) : ImmutablePass(ID), DL(M) {
   initializeDataLayoutPassPass(*PassRegistry::getPassRegistry());
 }

llvm/lib/IR/Globals.cpp

@@ -40,6 +40,10 @@ void GlobalValue::Dematerialize() {
   getParent()->Dematerialize(this);
 }
 
+const DataLayout *GlobalValue::getDataLayout() const {
+  return getParent()->getDataLayout();
+}
+
 /// Override destroyConstant to make sure it doesn't get called on
 /// GlobalValue's because they shouldn't be treated like other constants.
 void GlobalValue::destroyConstant() {

llvm/lib/IR/Instruction.cpp

@@ -35,6 +35,10 @@ Instruction::Instruction(Type *ty, unsigned it, Use *Ops, unsigned NumOps,
   }
 }
 
+const DataLayout *Instruction::getDataLayout() const {
+  return getParent()->getDataLayout();
+}
+
 Instruction::Instruction(Type *ty, unsigned it, Use *Ops, unsigned NumOps,
                          BasicBlock *InsertAtEnd)
   : User(ty, Value::InstructionVal + it, Ops, NumOps), Parent(0) {

llvm/lib/LTO/LTOCodeGenerator.cpp

@@ -482,7 +482,8 @@ bool LTOCodeGenerator::generateObjectFile(raw_ostream &out,
   passes.add(createVerifierPass());
 
   // Add an appropriate DataLayout instance for this module...
-  passes.add(new DataLayoutPass(*TargetMach->getDataLayout()));
+  mergedModule->setDataLayout(TargetMach->getDataLayout());
+  passes.add(new DataLayoutPass(mergedModule));
 
   // Add appropriate TargetLibraryInfo for this module.
   passes.add(new TargetLibraryInfo(Triple(TargetMach->getTargetTriple())));
@@ -503,7 +504,7 @@ bool LTOCodeGenerator::generateObjectFile(raw_ostream &out,
 
   PassManager codeGenPasses;
 
-  codeGenPasses.add(new DataLayoutPass(*TargetMach->getDataLayout()));
+  codeGenPasses.add(new DataLayoutPass(mergedModule));
 
   formatted_raw_ostream Out(out);
 

llvm/lib/Target/Target.cpp

@@ -55,6 +55,8 @@ 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)));
 }
 

llvm/lib/Target/TargetMachineC.cpp

@@ -212,7 +212,8 @@ static LLVMBool LLVMTargetMachineEmit(LLVMTargetMachineRef T, LLVMModuleRef M,
     *ErrorMessage = strdup(error.c_str());
     return true;
   }
-  pass.add(new DataLayoutPass(*td));
+  Mod->setDataLayout(td);
+  pass.add(new DataLayoutPass(Mod));
 
   TargetMachine::CodeGenFileType ft;
   switch (codegen) {

llvm/tools/llc/llc.cpp

@@ -299,9 +299,8 @@ 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.getDataLayout())
-    PM.add(new DataLayoutPass(*DL));
+    mod->setDataLayout(DL);
-  else
+  PM.add(new DataLayoutPass(mod));
-    PM.add(new DataLayoutPass(mod));
 
   // Override default to generate verbose assembly.
   Target.setAsmVerbosityDefault(true);

llvm/tools/opt/opt.cpp

@@ -430,11 +430,13 @@ int main(int argc, char **argv) {
 
   // Add an appropriate DataLayout instance for this module.
   const DataLayout *DL = M.get()->getDataLayout();
-  if (!DL && !DefaultDataLayout.empty())
+  if (!DL && !DefaultDataLayout.empty()) {
-    DL = new DataLayout(DefaultDataLayout);
+    M->setDataLayout(DefaultDataLayout);
+    DL = M.get()->getDataLayout();
+  }
 
   if (DL)
-    Passes.add(new DataLayoutPass(*DL));
+    Passes.add(new DataLayoutPass(M.get()));
 
   Triple ModuleTriple(M->getTargetTriple());
   TargetMachine *Machine = 0;
@@ -450,7 +452,7 @@ int main(int argc, char **argv) {
   if (OptLevelO1 || OptLevelO2 || OptLevelOs || OptLevelOz || OptLevelO3) {
     FPasses.reset(new FunctionPassManager(M.get()));
     if (DL)
-      FPasses->add(new DataLayoutPass(*DL));
+      FPasses->add(new DataLayoutPass(M.get()));
     if (TM.get())
       TM->addAnalysisPasses(*FPasses);