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https://github.com/c64scene-ar/llvm-6502.git
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529919ff31
Summary: Now that the DataLayout is a mandatory part of the module, let's start cleaning the codebase. This patch is a first attempt at doing that. This patch is not exactly NFC as for instance some places were passing a nullptr instead of the DataLayout, possibly just because there was a default value on the DataLayout argument to many functions in the API. Even though it is not purely NFC, there is no change in the validation. I turned as many pointer to DataLayout to references, this helped figuring out all the places where a nullptr could come up. I had initially a local version of this patch broken into over 30 independant, commits but some later commit were cleaning the API and touching part of the code modified in the previous commits, so it seemed cleaner without the intermediate state. Test Plan: Reviewers: echristo Subscribers: llvm-commits From: Mehdi Amini <mehdi.amini@apple.com> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231740 91177308-0d34-0410-b5e6-96231b3b80d8
70 lines
2.1 KiB
C++
70 lines
2.1 KiB
C++
//===- MemDerefPrinter.cpp - Printer for isDereferenceablePointer ---------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/Passes.h"
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#include "llvm/ADT/SetVector.h"
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#include "llvm/Analysis/MemoryDependenceAnalysis.h"
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#include "llvm/IR/CallSite.h"
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#include "llvm/IR/DataLayout.h"
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#include "llvm/IR/InstIterator.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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namespace {
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struct MemDerefPrinter : public FunctionPass {
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SmallVector<Value *, 4> Vec;
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static char ID; // Pass identifcation, replacement for typeid
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MemDerefPrinter() : FunctionPass(ID) {
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initializeMemDerefPrinterPass(*PassRegistry::getPassRegistry());
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}
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void getAnalysisUsage(AnalysisUsage &AU) const override {
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AU.setPreservesAll();
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}
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bool runOnFunction(Function &F) override;
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void print(raw_ostream &OS, const Module * = nullptr) const override;
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void releaseMemory() override {
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Vec.clear();
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}
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};
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}
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char MemDerefPrinter::ID = 0;
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INITIALIZE_PASS_BEGIN(MemDerefPrinter, "print-memderefs",
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"Memory Dereferenciblity of pointers in function", false, true)
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INITIALIZE_PASS_END(MemDerefPrinter, "print-memderefs",
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"Memory Dereferenciblity of pointers in function", false, true)
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FunctionPass *llvm::createMemDerefPrinter() {
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return new MemDerefPrinter();
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}
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bool MemDerefPrinter::runOnFunction(Function &F) {
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const DataLayout &DL = F.getParent()->getDataLayout();
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for (auto &I: inst_range(F)) {
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if (LoadInst *LI = dyn_cast<LoadInst>(&I)) {
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Value *PO = LI->getPointerOperand();
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if (PO->isDereferenceablePointer(DL))
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Vec.push_back(PO);
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}
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}
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return false;
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}
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void MemDerefPrinter::print(raw_ostream &OS, const Module *M) const {
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OS << "The following are dereferenceable:\n";
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for (auto &V: Vec) {
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V->print(OS);
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OS << "\n\n";
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}
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}
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