src/llvm/lib/Analysis/PtrUseVisitor.cpp

   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 (Use &U : I.uses()) {
  20     if (VisitedUses.insert(&U).second) {
  21       UseToVisit NewU = {
  22         UseToVisit::UseAndIsOffsetKnownPair(&U, IsOffsetKnown),
  23         Offset
  24       };
  25       Worklist.push_back(std::move(NewU));
  26     }
  27   }
  28 }
  29
  30 bool detail::PtrUseVisitorBase::adjustOffsetForGEP(GetElementPtrInst &GEPI) {
  31   if (!IsOffsetKnown)
  32     return false;
  33
  34   return GEPI.accumulateConstantOffset(DL, Offset);
  35 }