mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 20:09:46 +00:00
79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
//===- MemDerefPrinter.cpp - Printer for isDereferenceablePointer ---------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Analysis/Loads.h"
|
|
#include "llvm/Analysis/Passes.h"
|
|
#include "llvm/IR/DataLayout.h"
|
|
#include "llvm/IR/InstIterator.h"
|
|
#include "llvm/IR/Instructions.h"
|
|
#include "llvm/IR/LLVMContext.h"
|
|
#include "llvm/IR/Module.h"
|
|
#include "llvm/InitializePasses.h"
|
|
#include "llvm/Pass.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
struct MemDerefPrinter : public FunctionPass {
|
|
SmallVector<Value *, 4> Deref;
|
|
SmallPtrSet<Value *, 4> DerefAndAligned;
|
|
|
|
static char ID; // Pass identification, replacement for typeid
|
|
MemDerefPrinter() : FunctionPass(ID) {
|
|
initializeMemDerefPrinterPass(*PassRegistry::getPassRegistry());
|
|
}
|
|
void getAnalysisUsage(AnalysisUsage &AU) const override {
|
|
AU.setPreservesAll();
|
|
}
|
|
bool runOnFunction(Function &F) override;
|
|
void print(raw_ostream &OS, const Module * = nullptr) const override;
|
|
void releaseMemory() override {
|
|
Deref.clear();
|
|
DerefAndAligned.clear();
|
|
}
|
|
};
|
|
}
|
|
|
|
char MemDerefPrinter::ID = 0;
|
|
INITIALIZE_PASS_BEGIN(MemDerefPrinter, "print-memderefs",
|
|
"Memory Dereferenciblity of pointers in function", false, true)
|
|
INITIALIZE_PASS_END(MemDerefPrinter, "print-memderefs",
|
|
"Memory Dereferenciblity of pointers in function", false, true)
|
|
|
|
FunctionPass *llvm::createMemDerefPrinter() {
|
|
return new MemDerefPrinter();
|
|
}
|
|
|
|
bool MemDerefPrinter::runOnFunction(Function &F) {
|
|
const DataLayout &DL = F.getParent()->getDataLayout();
|
|
for (auto &I: instructions(F)) {
|
|
if (LoadInst *LI = dyn_cast<LoadInst>(&I)) {
|
|
Value *PO = LI->getPointerOperand();
|
|
if (isDereferenceablePointer(PO, LI->getType(), DL))
|
|
Deref.push_back(PO);
|
|
if (isDereferenceableAndAlignedPointer(
|
|
PO, LI->getType(), MaybeAlign(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 (Value *V: Deref) {
|
|
V->print(OS);
|
|
if (DerefAndAligned.count(V))
|
|
OS << "\t(aligned)";
|
|
else
|
|
OS << "\t(unaligned)";
|
|
OS << "\n\n";
|
|
}
|
|
}
|