Ejemplo n.º 1
0
void JITEmitter::emitConstantPool(MachineConstantPool *MCP) {
  const std::vector<MachineConstantPoolEntry> &Constants = MCP->getConstants();
  if (Constants.empty()) return;

  MachineConstantPoolEntry CPE = Constants.back();
  unsigned Size = CPE.Offset;
  const Type *Ty = CPE.isMachineConstantPoolEntry()
    ? CPE.Val.MachineCPVal->getType() : CPE.Val.ConstVal->getType();
  Size += TheJIT->getTargetData()->getABITypeSize(Ty);

  unsigned Align = 1 << MCP->getConstantPoolAlignment();
  ConstantPoolBase = allocateSpace(Size, Align);
  ConstantPool = MCP;

  if (ConstantPoolBase == 0) return;  // Buffer overflow.

  DOUT << "JIT: Emitted constant pool at [" << ConstantPoolBase
       << "] (size: " << Size << ", alignment: " << Align << ")\n";

  // Initialize the memory for all of the constant pool entries.
  for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
    void *CAddr = (char*)ConstantPoolBase+Constants[i].Offset;
    if (Constants[i].isMachineConstantPoolEntry()) {
      // FIXME: add support to lower machine constant pool values into bytes!
      cerr << "Initialize memory with machine specific constant pool entry"
           << " has not been implemented!\n";
      abort();
    }
    TheJIT->InitializeMemory(Constants[i].Val.ConstVal, CAddr);
    DOUT << "JIT:   CP" << i << " at [" << CAddr << "]\n";
  }
}
/// EmitConstantPool - Print to the current output stream assembly
/// representations of the constants in the constant pool MCP. This is
/// used to print out constants which have been "spilled to memory" by
/// the code generator.
///
void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
  const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
  if (CP.empty()) return;

  // Some targets require 4-, 8-, and 16- byte constant literals to be placed
  // in special sections.
  std::vector<std::pair<MachineConstantPoolEntry,unsigned> > FourByteCPs;
  std::vector<std::pair<MachineConstantPoolEntry,unsigned> > EightByteCPs;
  std::vector<std::pair<MachineConstantPoolEntry,unsigned> > SixteenByteCPs;
  std::vector<std::pair<MachineConstantPoolEntry,unsigned> > OtherCPs;
  std::vector<std::pair<MachineConstantPoolEntry,unsigned> > TargetCPs;
  for (unsigned i = 0, e = CP.size(); i != e; ++i) {
    MachineConstantPoolEntry CPE = CP[i];
    const Type *Ty = CPE.getType();
    if (TAI->getFourByteConstantSection() &&
        TM.getTargetData()->getTypeSize(Ty) == 4)
      FourByteCPs.push_back(std::make_pair(CPE, i));
    else if (TAI->getEightByteConstantSection() &&
             TM.getTargetData()->getTypeSize(Ty) == 8)
      EightByteCPs.push_back(std::make_pair(CPE, i));
    else if (TAI->getSixteenByteConstantSection() &&
             TM.getTargetData()->getTypeSize(Ty) == 16)
      SixteenByteCPs.push_back(std::make_pair(CPE, i));
    else
      OtherCPs.push_back(std::make_pair(CPE, i));
  }

  unsigned Alignment = MCP->getConstantPoolAlignment();
  EmitConstantPool(Alignment, TAI->getFourByteConstantSection(), FourByteCPs);
  EmitConstantPool(Alignment, TAI->getEightByteConstantSection(), EightByteCPs);
  EmitConstantPool(Alignment, TAI->getSixteenByteConstantSection(),
                   SixteenByteCPs);
  EmitConstantPool(Alignment, TAI->getConstantPoolSection(), OtherCPs);
}
Ejemplo n.º 3
0
static unsigned GetConstantPoolSizeInBytes(MachineConstantPool *MCP) {
  const std::vector<MachineConstantPoolEntry> &Constants = MCP->getConstants();
  if (Constants.empty()) return 0;

  MachineConstantPoolEntry CPE = Constants.back();
  unsigned Size = CPE.Offset;
  const Type *Ty = CPE.isMachineConstantPoolEntry()
    ? CPE.Val.MachineCPVal->getType() : CPE.Val.ConstVal->getType();
  Size += TheJIT->getTargetData()->getABITypeSize(Ty);
  return Size;
}
Ejemplo n.º 4
0
static unsigned GetConstantPoolSizeInBytes(MachineConstantPool *MCP,
                                           const DataLayout *TD) {
  const std::vector<MachineConstantPoolEntry> &Constants = MCP->getConstants();
  if (Constants.empty()) return 0;

  unsigned Size = 0;
  for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
    MachineConstantPoolEntry CPE = Constants[i];
    unsigned AlignMask = CPE.getAlignment() - 1;
    Size = (Size + AlignMask) & ~AlignMask;
    Type *Ty = CPE.getType();
    Size += TD->getTypeAllocSize(Ty);
  }
  return Size;
}
void SVMBlockSizeAccumulator::AddConstant(const TargetData &TD,
    const MachineConstantPoolEntry &CPE)
{
    AddConstant(TD.getTypeAllocSize(CPE.getType()), CPE.getAlignment());
}