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//===- PtrUseVisitor.cpp - InstVisitors over a pointers uses --------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
/// \file
/// Implementation of the pointer use visitors.
//
//===----------------------------------------------------------------------===//
#include "llvm/Analysis/PtrUseVisitor.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/Instructions.h"
#include <algorithm>
using namespace llvm;
void detail::PtrUseVisitorBase::enqueueUsers(Instruction &I) {
for (Use &U : I.uses()) {
if (VisitedUses.insert(&U).second) {
UseToVisit NewU = {
UseToVisit::UseAndIsOffsetKnownPair(&U, IsOffsetKnown),
Offset
};
Worklist.push_back(std::move(NewU));
}
}
}
bool detail::PtrUseVisitorBase::adjustOffsetForGEP(GetElementPtrInst &GEPI) {
if (!IsOffsetKnown)
return false;
APInt TmpOffset(DL.getIndexTypeSizeInBits(GEPI.getType()), 0);
if (GEPI.accumulateConstantOffset(DL, TmpOffset)) {
Offset += TmpOffset.sextOrTrunc(Offset.getBitWidth());
return true;
}
return false;
}
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