44 lines · cpp
1//===- PtrUseVisitor.cpp - InstVisitors over a pointers uses --------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9/// \file10/// Implementation of the pointer use visitors.11//12//===----------------------------------------------------------------------===//13 14#include "llvm/Analysis/PtrUseVisitor.h"15#include "llvm/IR/Instruction.h"16#include "llvm/IR/Instructions.h"17 18using namespace llvm;19 20void detail::PtrUseVisitorBase::enqueueUsers(Value &I) {21 for (Use &U : I.uses()) {22 if (VisitedUses.insert(&U).second) {23 UseToVisit NewU = {24 UseToVisit::UseAndIsOffsetKnownPair(&U, IsOffsetKnown),25 Offset26 };27 Worklist.push_back(std::move(NewU));28 }29 }30}31 32bool detail::PtrUseVisitorBase::adjustOffsetForGEP(GetElementPtrInst &GEPI) {33 if (!IsOffsetKnown)34 return false;35 36 APInt TmpOffset(DL.getIndexTypeSizeInBits(GEPI.getType()), 0);37 if (GEPI.accumulateConstantOffset(DL, TmpOffset)) {38 Offset += TmpOffset.sextOrTrunc(Offset.getBitWidth());39 return true;40 }41 42 return false;43}44