-//===- SafePointerAccess.cpp - Check pointer usage safety -------------------=//
+//===- FindUnsafePointerTypes.cpp - Check pointer usage safety --------------=//
//
// This file defines a pass that can be used to determine, interprocedurally,
// which pointer types are accessed unsafely in a program. If there is an
#include "llvm/Analysis/FindUnsafePointerTypes.h"
#include "llvm/Assembly/CachedWriter.h"
#include "llvm/Type.h"
-#include "llvm/Instruction.h"
-#include "llvm/Method.h"
#include "llvm/Module.h"
+#include "llvm/Support/InstIterator.h"
#include "Support/CommandLine.h"
-AnalysisID FindUnsafePointerTypes::ID(AnalysisID::create<FindUnsafePointerTypes>());
+static RegisterAnalysis<FindUnsafePointerTypes>
+X("unsafepointertypes", "Find Unsafe Pointer Types");
// Provide a command line option to turn on printing of which instructions cause
// a type to become invalid
//
-static cl::Flag
-PrintFailures("printunsafeptrinst", "Print Unsafe Pointer Access Instructions",
- cl::Hidden, false);
+static cl::opt<bool>
+PrintFailures("printunsafeptrinst", cl::Hidden,
+ cl::desc("Print Unsafe Pointer Access Instructions"));
static inline bool isSafeInstruction(const Instruction *I) {
switch (I->getOpcode()) {
}
-// runOnMethod - Inspect the operations that the specified method does on
-// values of various types. If they are deemed to be 'unsafe' note that the
-// type is not safe to transform.
-//
-bool FindUnsafePointerTypes::run(Module *Mod) {
- for (Module::iterator MI = Mod->begin(), ME = Mod->end();
- MI != ME; ++MI) {
- const Method *M = *MI; // We don't need/want write access
- for (Method::const_inst_iterator I = M->inst_begin(), E = M->inst_end();
- I != E; ++I) {
- const Instruction *Inst = *I;
- const Type *ITy = Inst->getType();
- if (ITy->isPointerType() && !UnsafeTypes.count((PointerType*)ITy))
- if (!isSafeInstruction(Inst)) {
+bool FindUnsafePointerTypes::run(Module &Mod) {
+ for (Module::iterator FI = Mod.begin(), E = Mod.end();
+ FI != E; ++FI) {
+ const Function *F = FI; // We don't need/want write access
+ for (const_inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I) {
+ const Type *ITy = I->getType();
+ if (isa<PointerType>(ITy) && !UnsafeTypes.count((PointerType*)ITy))
+ if (!isSafeInstruction(*I)) {
UnsafeTypes.insert((PointerType*)ITy);
if (PrintFailures) {
- CachedWriter CW(M->getParent(), std::cerr);
+ CachedWriter CW(F->getParent(), std::cerr);
CW << "FindUnsafePointerTypes: Type '" << ITy
- << "' marked unsafe in '" << M->getName() << "' by:\n" << Inst;
+ << "' marked unsafe in '" << F->getName() << "' by:\n" << **I;
}
}
}
// printResults - Loop over the results of the analysis, printing out unsafe
// types.
//
-void FindUnsafePointerTypes::printResults(const Module *M,
- std::ostream &o) const {
+void FindUnsafePointerTypes::print(std::ostream &o, const Module *M) const {
if (UnsafeTypes.empty()) {
o << "SafePointerAccess Analysis: No unsafe types found!\n";
return;
CW << " #" << Counter << ". " << (Value*)*I << "\n";
}
}
-
-// getAnalysisUsageInfo - Of course, we provide ourself...
-//
-void FindUnsafePointerTypes::getAnalysisUsageInfo(Pass::AnalysisSet &Required,
- Pass::AnalysisSet &Destroyed,
- Pass::AnalysisSet &Provided) {
- Provided.push_back(FindUnsafePointerTypes::ID);
-}