#include "llvm/Analysis/Passes.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/Analysis/MemoryDependenceAnalysis.h"
+#include "llvm/Analysis/ValueTracking.h"
#include "llvm/IR/CallSite.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/InstIterator.h"
namespace {
struct MemDerefPrinter : public FunctionPass {
- SmallVector<Value *, 4> Vec;
+ SmallVector<Value *, 4> Deref;
+ SmallPtrSet<Value *, 4> DerefAndAligned;
- static char ID; // Pass identifcation, replacement for typeid
+ static char ID; // Pass identification, replacement for typeid
MemDerefPrinter() : FunctionPass(ID) {
initializeMemDerefPrinterPass(*PassRegistry::getPassRegistry());
}
bool runOnFunction(Function &F) override;
void print(raw_ostream &OS, const Module * = nullptr) const override;
void releaseMemory() override {
- Vec.clear();
+ Deref.clear();
+ DerefAndAligned.clear();
}
};
}
bool MemDerefPrinter::runOnFunction(Function &F) {
const DataLayout &DL = F.getParent()->getDataLayout();
- for (auto &I: inst_range(F)) {
+ for (auto &I: instructions(F)) {
if (LoadInst *LI = dyn_cast<LoadInst>(&I)) {
Value *PO = LI->getPointerOperand();
- if (PO->isDereferenceablePointer(&DL))
- Vec.push_back(PO);
+ if (isDereferenceablePointer(PO, DL))
+ Deref.push_back(PO);
+ if (isDereferenceableAndAlignedPointer(PO, LI->getAlignment(), DL))
+ DerefAndAligned.insert(PO);
}
}
return false;
void MemDerefPrinter::print(raw_ostream &OS, const Module *M) const {
OS << "The following are dereferenceable:\n";
- for (auto &V: Vec) {
+ for (Value *V: Deref) {
V->print(OS);
+ if (DerefAndAligned.count(V))
+ OS << "\t(aligned)";
+ else
+ OS << "\t(unaligned)";
OS << "\n\n";
}
}