forked from OSchip/llvm-project
39 lines
1.1 KiB
C++
39 lines
1.1 KiB
C++
//===- 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;
|
|
|
|
return GEPI.accumulateConstantOffset(DL, Offset);
|
|
}
|