MachineDebugInfo.cpp

  // If a compile unit we need the debug version.
  if (Tag == DI_TAG_compile_unit) {
    DebugVersion = CompileUnitDesc::DebugVersionFromGlobal(GV);
    if (DebugVersion == DIInvalid) return false;
  }

  // Construct an empty DebugInfoDesc.
  DebugInfoDesc *DD = DebugInfoDesc::DescFactory(Tag);
  if (!DD) return false;
  
  // Get the initializer constant.
  ConstantStruct *CI = cast<ConstantStruct>(GV->getInitializer());
  
  // Get the operand count.
  unsigned N = CI->getNumOperands();
  
  // Get the field count.
  unsigned &Slot = Counts[Tag];
  if (!Slot) {
    // Check the operand count to the field count
    DICountVisitor CTAM;
    CTAM.ApplyToFields(DD);
    Slot = CTAM.getCount();
  }
  
  // Field count must equal operand count.
  if (Slot != N) {
    delete DD;
    return false;
  }
  
  // Check each field for valid type.
  DIVerifyVisitor VRAM(*this, GV);
  VRAM.ApplyToFields(DD);
  
  // Release empty DebugInfoDesc.
  delete DD;
  
  // Return result of field tests.
  return VRAM.isValid();
}

//===----------------------------------------------------------------------===//


MachineDebugInfo::MachineDebugInfo()
: DR()
, CompileUnits()
, Directories()
, SourceFiles()
, Lines()
{
  
}
MachineDebugInfo::~MachineDebugInfo() {

}

/// doInitialization - Initialize the debug state for a new module.
///
bool MachineDebugInfo::doInitialization() {
  return false;
}

/// doFinalization - Tear down the debug state after completion of a module.
///
bool MachineDebugInfo::doFinalization() {
  return false;
}

/// getDescFor - Convert a Value to a debug information descriptor.
///
// FIXME - use new Value type when available.
DebugInfoDesc *MachineDebugInfo::getDescFor(Value *V) {
  return DR.Deserialize(V);
}

/// Verify - Verify that a Value is debug information descriptor.
///
bool MachineDebugInfo::Verify(Value *V) {
  DIVerifier VR;
  return VR.Verify(V);
}

/// AnalyzeModule - Scan the module for global debug information.
///
void MachineDebugInfo::AnalyzeModule(Module &M) {
  SetupCompileUnits(M);
}

/// SetupCompileUnits - Set up the unique vector of compile units.
///
void MachineDebugInfo::SetupCompileUnits(Module &M) {
  std::vector<CompileUnitDesc *>CU = getAnchoredDescriptors<CompileUnitDesc>(M);
  
  for (unsigned i = 0, N = CU.size(); i < N; i++) {
    CompileUnits.insert(CU[i]);
  }
}

/// getCompileUnits - Return a vector of debug compile units.
///
const UniqueVector<CompileUnitDesc *> MachineDebugInfo::getCompileUnits()const{
  return CompileUnits;
}

/// getGlobalVariablesUsing - Return all of the GlobalVariables that use the
/// named GlobalVariable.
std::vector<GlobalVariable*>
MachineDebugInfo::getGlobalVariablesUsing(Module &M,
                                          const std::string &RootName) {
  return ::getGlobalVariablesUsing(M, RootName);
}