C++ (Cpp) const_iterator::getMetadata Examples

Example #1

File: ClamBCDiagnostics.cpp Project: Udit-Sharma/clamav-bytecode-compiler

// Print instruction location, falls back to printing function location,
// (and LLVM instruction if specified).
void printLocation(const llvm::Instruction *I, bool fallback) {
  const BasicBlock *BB = I->getParent();
  bool approx = false;
  BasicBlock::const_iterator It = I;
  do {
    BasicBlock::const_iterator ItB = BB->begin();
    while (It != ItB) {
      if (MDNode *N = It->getMetadata("dbg")) {
        DILocation Loc(N);
        errs() << /*Loc.getDirectory() << "/" <<*/ Loc.getFilename()
          << ":" << Loc.getLineNumber();
        if (unsigned Col = Loc.getColumnNumber()) {
          errs() << ":" << Col;
        }
        if (approx)
          errs() << "(?)";
        errs() << ": ";
        DIScope Scope = Loc.getScope();
        while (Scope.isLexicalBlock()) {
          DILexicalBlock LB(Scope.getNode());
          Scope = LB.getContext();
        }
        if (Scope.isSubprogram()) {
          DISubprogram SP(Scope.getNode());
          errs() << "in function '" << SP.getDisplayName() << "': ";
        }
        return;
      }
      approx = true;
      --It;
    }
    BB = BB->getUniquePredecessor();
    if (BB)
      It = BB->end();
  } while (BB);
  printLocation(I->getParent()->getParent());
  if (fallback)
    errs() << *I << ":\n";
}