| //===- FindUsedTypes.cpp - Find all Types used by a module ----------------===// |
| // |
| // This pass is used to seek out all of the types in use by the program. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/Analysis/FindUsedTypes.h" |
| #include "llvm/Assembly/CachedWriter.h" |
| #include "llvm/SymbolTable.h" |
| #include "llvm/DerivedTypes.h" |
| #include "llvm/Module.h" |
| #include "llvm/Support/InstIterator.h" |
| |
| static RegisterAnalysis<FindUsedTypes> |
| X("printusedtypes", "Find Used Types"); |
| |
| // stub to help linkage |
| void FindUsedTypes::stub() {} |
| |
| // IncorporateType - Incorporate one type and all of its subtypes into the |
| // collection of used types. |
| // |
| void FindUsedTypes::IncorporateType(const Type *Ty) { |
| if (UsedTypes.count(Ty)) return; // Already contain Ty. |
| |
| // If ty doesn't already exist in the used types map, add it now. |
| // |
| UsedTypes.insert(Ty); |
| |
| // Make sure to add any types this type references now. |
| // |
| for (Type::subtype_iterator I = Ty->subtype_begin(), E = Ty->subtype_end(); |
| I != E; ++I) |
| IncorporateType(*I); |
| } |
| |
| |
| // run - This incorporates all types used by the specified module |
| // |
| bool FindUsedTypes::run(Module &m) { |
| UsedTypes.clear(); // reset if run multiple times... |
| |
| // Loop over global variables, incorporating their types |
| for (Module::const_giterator I = m.gbegin(), E = m.gend(); I != E; ++I) |
| IncorporateType(I->getType()); |
| |
| for (Module::iterator MI = m.begin(), ME = m.end(); MI != ME; ++MI) { |
| IncorporateType(MI->getType()); |
| const Function &F = *MI; |
| |
| // Loop over all of the instructions in the function, adding their return |
| // type as well as the types of their operands. |
| // |
| for (const_inst_iterator II = inst_begin(F), IE = inst_end(F); |
| II != IE; ++II) { |
| const Instruction *I = *II; |
| const Type *Ty = I->getType(); |
| |
| IncorporateType(Ty); // Incorporate the type of the instruction |
| for (User::const_op_iterator OI = I->op_begin(), OE = I->op_end(); |
| OI != OE; ++OI) |
| if ((*OI)->getType() != Ty) // Avoid set lookup in common case |
| IncorporateType((*OI)->getType());// Insert inst operand types as well |
| } |
| } |
| |
| return false; |
| } |
| |
| // Print the types found in the module. If the optional Module parameter is |
| // passed in, then the types are printed symbolically if possible, using the |
| // symbol table from the module. |
| // |
| void FindUsedTypes::print(std::ostream &o, const Module *M) const { |
| o << "Types in use by this module:\n"; |
| if (M) { |
| CachedWriter CW(M, o); |
| for (std::set<const Type *>::const_iterator I = UsedTypes.begin(), |
| E = UsedTypes.end(); I != E; ++I) |
| CW << " " << *I << "\n"; |
| } else |
| for (std::set<const Type *>::const_iterator I = UsedTypes.begin(), |
| E = UsedTypes.end(); I != E; ++I) |
| o << " " << *I << "\n"; |
| } |