PtrUseVisitor.cpp revision 249423 
1//===- PtrUseVisitor.cpp - InstVisitors over a pointers uses --------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9/// \file
10/// Implementation of the pointer use visitors.
11///
12//===----------------------------------------------------------------------===//
13
14#include "llvm/Analysis/PtrUseVisitor.h"
15
16using namespace llvm;
17
18void detail::PtrUseVisitorBase::enqueueUsers(Instruction &I) {
19  for (Value::use_iterator UI = I.use_begin(), UE = I.use_end();
20       UI != UE; ++UI) {
21    if (VisitedUses.insert(&UI.getUse())) {
22      UseToVisit NewU = {
23        UseToVisit::UseAndIsOffsetKnownPair(&UI.getUse(), IsOffsetKnown),
24        Offset
25      };
26      Worklist.push_back(llvm_move(NewU));
27    }
28  }
29}
30
31bool detail::PtrUseVisitorBase::adjustOffsetForGEP(GetElementPtrInst &GEPI) {
32  if (!IsOffsetKnown)
33    return false;
34
35  return GEPI.accumulateConstantOffset(DL, Offset);
36}
37