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2fbfdcffd3
class. The Method class is obsolete (renamed) and all references to it are being converted over to Function. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2144 91177308-0d34-0410-b5e6-96231b3b80d8
104 lines
3.7 KiB
C++
104 lines
3.7 KiB
C++
//===- FindUsedTypes.cpp - Find all Types used by a module ------------------=//
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//
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// This pass is used to seek out all of the types in use by the program.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/FindUsedTypes.h"
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#include "llvm/Assembly/CachedWriter.h"
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#include "llvm/SymbolTable.h"
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#include "llvm/GlobalVariable.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Module.h"
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#include "llvm/Function.h"
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#include "llvm/Instruction.h"
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#include "llvm/Support/InstIterator.h"
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AnalysisID FindUsedTypes::ID(AnalysisID::create<FindUsedTypes>());
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AnalysisID FindUsedTypes::IncludeSymbolTableID(AnalysisID::create<FindUsedTypes>());
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// IncorporateType - Incorporate one type and all of its subtypes into the
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// collection of used types.
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//
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void FindUsedTypes::IncorporateType(const Type *Ty) {
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if (UsedTypes.count(Ty)) return; // Already contain Ty.
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// If ty doesn't already exist in the used types map, add it now.
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//
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UsedTypes.insert(Ty);
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// Make sure to add any types this type references now.
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//
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for (Type::subtype_iterator I = Ty->subtype_begin(), E = Ty->subtype_end();
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I != E; ++I)
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IncorporateType(*I);
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}
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// IncorporateSymbolTable - Add all types referenced by the specified symtab
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// into the collection of used types.
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//
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void FindUsedTypes::IncorporateSymbolTable(const SymbolTable *ST) {
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assert(0 && "Unimp");
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}
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// run - This incorporates all types used by the specified module
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//
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bool FindUsedTypes::run(Module *m) {
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UsedTypes.clear(); // reset if run multiple times...
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if (IncludeSymbolTables && m->hasSymbolTable())
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IncorporateSymbolTable(m->getSymbolTable()); // Add symtab first...
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// Loop over global variables, incorporating their types
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for (Module::const_giterator I = m->gbegin(), E = m->gend(); I != E; ++I)
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IncorporateType((*I)->getType());
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for (Module::iterator MI = m->begin(), ME = m->end(); MI != ME; ++MI) {
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const Function *M = *MI;
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if (IncludeSymbolTables && M->hasSymbolTable())
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IncorporateSymbolTable(M->getSymbolTable()); // Add symtab first...
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// Loop over all of the instructions in the function, adding their return
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// type as well as the types of their operands.
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//
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for (const_inst_iterator II = inst_begin(M), IE = inst_end(M);
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II != IE; ++II) {
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const Instruction *I = *II;
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const Type *Ty = I->getType();
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IncorporateType(Ty); // Incorporate the type of the instruction
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for (User::const_op_iterator OI = I->op_begin(), OE = I->op_end();
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OI != OE; ++OI)
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if ((*OI)->getType() != Ty) // Avoid set lookup in common case
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IncorporateType((*OI)->getType());// Insert inst operand types as well
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}
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}
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return false;
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}
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// Print the types found in the module. If the optional Module parameter is
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// passed in, then the types are printed symbolically if possible, using the
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// symbol table from the module.
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//
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void FindUsedTypes::printTypes(std::ostream &o, const Module *M = 0) const {
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o << "Types in use by this module:\n";
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if (M) {
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CachedWriter CW(M, o);
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for (std::set<const Type *>::const_iterator I = UsedTypes.begin(),
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E = UsedTypes.end(); I != E; ++I)
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CW << " " << *I << "\n";
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} else
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for (std::set<const Type *>::const_iterator I = UsedTypes.begin(),
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E = UsedTypes.end(); I != E; ++I)
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o << " " << *I << "\n";
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}
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// getAnalysisUsageInfo - Of course, we provide ourself...
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//
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void FindUsedTypes::getAnalysisUsageInfo(Pass::AnalysisSet &Required,
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Pass::AnalysisSet &Destroyed,
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Pass::AnalysisSet &Provided) {
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Provided.push_back(FindUsedTypes::ID);
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}
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