45 lines
1.3 KiB
C++
45 lines
1.3 KiB
C++
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//===- PtrUseVisitor.cpp - InstVisitors over a pointers uses --------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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/// \file
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/// Implementation of the pointer use visitors.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/PtrUseVisitor.h"
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#include "llvm/IR/Instruction.h"
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#include "llvm/IR/Instructions.h"
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#include <algorithm>
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using namespace llvm;
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void detail::PtrUseVisitorBase::enqueueUsers(Instruction &I) {
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for (Use &U : I.uses()) {
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if (VisitedUses.insert(&U).second) {
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UseToVisit NewU = {
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UseToVisit::UseAndIsOffsetKnownPair(&U, IsOffsetKnown),
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Offset
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};
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Worklist.push_back(std::move(NewU));
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}
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}
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}
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bool detail::PtrUseVisitorBase::adjustOffsetForGEP(GetElementPtrInst &GEPI) {
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if (!IsOffsetKnown)
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return false;
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APInt TmpOffset(DL.getIndexTypeSizeInBits(GEPI.getType()), 0);
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if (GEPI.accumulateConstantOffset(DL, TmpOffset)) {
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Offset += TmpOffset.sextOrTrunc(Offset.getBitWidth());
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return true;
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}
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return false;
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}
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