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C++ SymbolReaper::getLocationContext方法代码示例

本文整理汇总了C++中SymbolReaper::getLocationContext方法的典型用法代码示例。如果您正苦于以下问题:C++ SymbolReaper::getLocationContext方法的具体用法?C++ SymbolReaper::getLocationContext怎么用?C++ SymbolReaper::getLocationContext使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在SymbolReaper的用法示例。


在下文中一共展示了SymbolReaper::getLocationContext方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: cb

Environment
EnvironmentManager::RemoveDeadBindings(Environment Env,
                                       SymbolReaper &SymReaper,
                                       const GRState *ST,
                              llvm::SmallVectorImpl<const MemRegion*> &DRoots) {

  CFG &C = *SymReaper.getLocationContext()->getCFG();

  // We construct a new Environment object entirely, as this is cheaper than
  // individually removing all the subexpression bindings (which will greatly
  // outnumber block-level expression bindings).
  Environment NewEnv = getInitialEnvironment();

  // Iterate over the block-expr bindings.
  for (Environment::iterator I = Env.begin(), E = Env.end();
       I != E; ++I) {

    const Stmt *BlkExpr = I.getKey();
    const SVal &X = I.getData();

    // Block-level expressions in callers are assumed always live.
    if (isBlockExprInCallers(BlkExpr, SymReaper.getLocationContext())) {
      NewEnv.ExprBindings = F.Add(NewEnv.ExprBindings, BlkExpr, X);

      if (isa<loc::MemRegionVal>(X)) {
        const MemRegion* R = cast<loc::MemRegionVal>(X).getRegion();
        DRoots.push_back(R);
      }

      // Mark all symbols in the block expr's value live.
      MarkLiveCallback cb(SymReaper);
      ST->scanReachableSymbols(X, cb);
      continue;
    }

    // Not a block-level expression?
    if (!C.isBlkExpr(BlkExpr))
      continue;

    if (SymReaper.isLive(BlkExpr)) {
      // Copy the binding to the new map.
      NewEnv.ExprBindings = F.Add(NewEnv.ExprBindings, BlkExpr, X);

      // If the block expr's value is a memory region, then mark that region.
      if (isa<loc::MemRegionVal>(X)) {
        const MemRegion* R = cast<loc::MemRegionVal>(X).getRegion();
        DRoots.push_back(R);
      }

      // Mark all symbols in the block expr's value live.
      MarkLiveCallback cb(SymReaper);
      ST->scanReachableSymbols(X, cb);
      continue;
    }

    // Otherwise the expression is dead with a couple exceptions.
    // Do not misclean LogicalExpr or ConditionalOperator.  It is dead at the
    // beginning of itself, but we need its UndefinedVal to determine its
    // SVal.
    if (X.isUndef() && cast<UndefinedVal>(X).getData())
      NewEnv.ExprBindings = F.Add(NewEnv.ExprBindings, BlkExpr, X);
  }

  return NewEnv;
}
开发者ID:lgerbarg,项目名称:clang,代码行数:65,代码来源:Environment.cpp


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