path: root/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp

//===-- llvm/CodeGen/DwarfCompileUnit.cpp - Dwarf Compile Unit ------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains support for writing dwarf compile unit.
//
//===----------------------------------------------------------------------===//

#define DEBUG_TYPE "dwarfdebug"

#include "DwarfCompileUnit.h"
#include "DwarfDebug.h"
#include "llvm/Constants.h"
#include "llvm/Analysis/DIBuilder.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetFrameLowering.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/ADT/APFloat.h"
#include "llvm/Support/ErrorHandling.h"

using namespace llvm;

/// CompileUnit - Compile unit constructor.
CompileUnit::CompileUnit(unsigned I, DIE *D, AsmPrinter *A, DwarfDebug *DW)
  : ID(I), CUDie(D), Asm(A), DD(DW), IndexTyDie(0) {
  DIEIntegerOne = new (DIEValueAllocator) DIEInteger(1);
}

/// ~CompileUnit - Destructor for compile unit.
CompileUnit::~CompileUnit() {
  for (unsigned j = 0, M = DIEBlocks.size(); j < M; ++j)
    DIEBlocks[j]->~DIEBlock();
}

/// createDIEEntry - Creates a new DIEEntry to be a proxy for a debug
/// information entry.
DIEEntry *CompileUnit::createDIEEntry(DIE *Entry) {
  DIEEntry *Value = new (DIEValueAllocator) DIEEntry(Entry);
  return Value;
}

/// addUInt - Add an unsigned integer attribute data and value.
///
void CompileUnit::addUInt(DIE *Die, unsigned Attribute,
                          unsigned Form, uint64_t Integer) {
  if (!Form) Form = DIEInteger::BestForm(false, Integer);
  DIEValue *Value = Integer == 1 ?
    DIEIntegerOne : new (DIEValueAllocator) DIEInteger(Integer);
  Die->addValue(Attribute, Form, Value);
}

/// addSInt - Add an signed integer attribute data and value.
///
void CompileUnit::addSInt(DIE *Die, unsigned Attribute,
                          unsigned Form, int64_t Integer) {
  if (!Form) Form = DIEInteger::BestForm(true, Integer);
  DIEValue *Value = new (DIEValueAllocator) DIEInteger(Integer);
  Die->addValue(Attribute, Form, Value);
}

/// addString - Add a string attribute data and value. DIEString only
/// keeps string reference.
void CompileUnit::addString(DIE *Die, unsigned Attribute, unsigned Form,
                            StringRef String) {
  DIEValue *Value = new (DIEValueAllocator) DIEString(String);
  Die->addValue(Attribute, Form, Value);
}

/// addLabel - Add a Dwarf label attribute data and value.
///
void CompileUnit::addLabel(DIE *Die, unsigned Attribute, unsigned Form,
                           const MCSymbol *Label) {
  DIEValue *Value = new (DIEValueAllocator) DIELabel(Label);
  Die->addValue(Attribute, Form, Value);
}

/// addDelta - Add a label delta attribute data and value.
///
void CompileUnit::addDelta(DIE *Die, unsigned Attribute, unsigned Form,
                           const MCSymbol *Hi, const MCSymbol *Lo) {
  DIEValue *Value = new (DIEValueAllocator) DIEDelta(Hi, Lo);
  Die->addValue(Attribute, Form, Value);
}

/// addDIEEntry - Add a DIE attribute data and value.
///
void CompileUnit::addDIEEntry(DIE *Die, unsigned Attribute, unsigned Form,
                              DIE *Entry) {
  Die->addValue(Attribute, Form, createDIEEntry(Entry));
}


/// addBlock - Add block data.
///
void CompileUnit::addBlock(DIE *Die, unsigned Attribute, unsigned Form,
                           DIEBlock *Block) {
  Block->ComputeSize(Asm);
  DIEBlocks.push_back(Block); // Memoize so we can call the destructor later on.
  Die->addValue(Attribute, Block->BestForm(), Block);
}

/// addSourceLine - Add location information to specified debug information
/// entry.
void CompileUnit::addSourceLine(DIE *Die, DIVariable V) {
  // Verify variable.
  if (!V.Verify())
    return;
  
  unsigned Line = V.