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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
16 using namespace llvm;
17
18 void 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
31 bool detail::PtrUseVisitorBase::adjustOffsetForGEP(GetElementPtrInst &GEPI) {
32   if (!IsOffsetKnown)
33     return false;
34
35   return GEPI.accumulateConstantOffset(DL, Offset);
36 }