-//===- FindUsedTypes.h - Find all Types used by a module --------------------=//
+//===- 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.
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This pass is used to seek out all of the types in use by the program. Note
+// that this analysis explicitly does not include types only used by the symbol
+// table.
//
//===----------------------------------------------------------------------===//
#include "llvm/Analysis/FindUsedTypes.h"
-#include "llvm/Assembly/CachedWriter.h"
-#include "llvm/SymbolTable.h"
-#include "llvm/GlobalVariable.h"
+#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
+#include "llvm/Module.h"
+#include "llvm/Assembly/Writer.h"
+#include "llvm/Support/InstIterator.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+
+char FindUsedTypes::ID = 0;
+static RegisterPass<FindUsedTypes>
+X("print-used-types", "Find Used Types", false, true);
// 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);
-
+ // If ty doesn't already exist in the used types map, add it now, otherwise
+ // return.
+ if (!UsedTypes.insert(Ty).second) return; // Already contain Ty.
+
// Make sure to add any types this type references now.
//
for (Type::subtype_iterator I = Ty->subtype_begin(), E = Ty->subtype_end();
IncorporateType(*I);
}
-// IncorporateSymbolTable - Add all types referenced by the specified symtab
-// into the collection of used types.
-//
-void FindUsedTypes::IncorporateSymbolTable(const SymbolTable *ST) {
- assert(0 && "Unimp");
+void FindUsedTypes::IncorporateValue(const Value *V) {
+ IncorporateType(V->getType());
+
+ // If this is a constant, it could be using other types...
+ if (const Constant *C = dyn_cast<Constant>(V)) {
+ if (!isa<GlobalValue>(C))
+ for (User::const_op_iterator OI = C->op_begin(), OE = C->op_end();
+ OI != OE; ++OI)
+ IncorporateValue(*OI);
+ }
}
-// doPassInitialization - This loops over global constants defined in the
-// module, converting them to their new type.
+// run - This incorporates all types used by the specified module
//
-bool FindUsedTypes::doPassInitialization(Module *m) {
- const Module *M = m;
- if (IncludeSymbolTables && M->hasSymbolTable())
- IncorporateSymbolTable(M->getSymbolTable()); // Add symtab first...
+bool FindUsedTypes::runOnModule(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());
- return false;
-}
+ for (Module::const_global_iterator I = m.global_begin(), E = m.global_end();
+ I != E; ++I) {
+ IncorporateType(I->getType());
+ if (I->hasInitializer())
+ IncorporateValue(I->getInitializer());
+ }
-// doPerMethodWork - This incorporates all types used by the specified method
-//
-bool FindUsedTypes::doPerMethodWork(Method *m) {
- const Method *M = m;
- if (IncludeSymbolTables && M->hasSymbolTable())
- IncorporateSymbolTable(M->getSymbolTable()); // Add symtab first...
-
- // Loop over all of the instructions in the method, adding their return type
- // as well as the types of their operands.
- //
- for (Method::inst_const_iterator II = M->inst_begin(), IE = M->inst_end();
- II != IE; ++II) {
- const Instruction *I = *II;
- const Type *Ty = I->getType();
-
- IncorporateType(Ty); // Incorporate the type of the instruction
- for (User::op_const_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
+ 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;
+
+ IncorporateType(I.getType()); // Incorporate the type of the instruction
+ for (User::const_op_iterator OI = I.op_begin(), OE = I.op_end();
+ OI != OE; ++OI)
+ IncorporateValue(*OI); // Insert inst operand types as well
+ }
}
-
+
return false;
}
// passed in, then the types are printed symbolically if possible, using the
// symbol table from the module.
//
-void FindUsedTypes::printTypes(ostream &o, const Module *M = 0) const {
- o << "Types in use by this module:\n";
- if (M) {
- CachedWriter CW(M, o);
- for (set<const Type *>::const_iterator I = UsedTypes.begin(),
- E = UsedTypes.end(); I != E; ++I)
- CW << " " << *I << endl;
- } else
- for (set<const Type *>::const_iterator I = UsedTypes.begin(),
- E = UsedTypes.end(); I != E; ++I)
- o << " " << *I << endl;
+void FindUsedTypes::print(raw_ostream &OS, const Module *M) const {
+ OS << "Types in use by this module:\n";
+ for (std::set<const Type *>::const_iterator I = UsedTypes.begin(),
+ E = UsedTypes.end(); I != E; ++I) {
+ OS << " ";
+ WriteTypeSymbolic(OS, *I, M);
+ OS << '\n';
+ }
}
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