addSInt(TheDie, dwarf::DW_FORM_sdata, Offset);
}
-/// addComplexAddress - Start with the address based on the location provided,
-/// and generate the DWARF information necessary to find the actual variable
-/// given the extra address information encoded in the DbgVariable, starting
-/// from the starting location. Add the DWARF information to the die.
-///
-void DwarfUnit::addComplexAddress(const DbgVariable &DV, DIE &Die,
- dwarf::Attribute Attribute,
- const MachineLocation &Location) {
- DIELoc *Loc = new (DIEValueAllocator) DIELoc();
- unsigned N = DV.getNumAddrElements();
- unsigned i = 0;
- if (Location.isReg()) {
- if (N >= 2 && DV.getAddrElement(0) == dwarf::DW_OP_plus) {
- assert(!DV.getVariable().isIndirect() &&
- "double indirection not handled");
- // If first address element is OpPlus then emit
- // DW_OP_breg + Offset instead of DW_OP_reg + Offset.
- addRegisterOffset(*Loc, Location.getReg(), DV.getAddrElement(1));
- i = 2;
- } else if (N >= 2 && DV.getAddrElement(0) == dwarf::DW_OP_deref) {
- assert(!DV.getVariable().isIndirect() &&
- "double indirection not handled");
- addRegisterOpPiece(*Loc, Location.getReg(),
- DV.getExpression().getPieceSize(),
- DV.getExpression().getPieceOffset());
- i = 3;
- } else
- addRegisterOpPiece(*Loc, Location.getReg());
- } else
- addRegisterOffset(*Loc, Location.getReg(), Location.getOffset());
-
- for (; i < N; ++i) {
- uint64_t Element = DV.getAddrElement(i);
- if (Element == dwarf::DW_OP_plus) {
- addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
- addUInt(*Loc, dwarf::DW_FORM_udata, DV.getAddrElement(++i));
-
- } else if (Element == dwarf::DW_OP_deref) {
- if (!Location.isReg())
- addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
-
- } else if (Element == dwarf::DW_OP_piece) {
- const unsigned SizeOfByte = 8;
- unsigned PieceOffsetInBits = DV.getAddrElement(++i)*SizeOfByte;
- unsigned PieceSizeInBits = DV.getAddrElement(++i)*SizeOfByte;
- // Emit DW_OP_bit_piece Size Offset.
- assert(PieceSizeInBits > 0 && "piece has zero size");
- addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_bit_piece);
- addUInt(*Loc, dwarf::DW_FORM_udata, PieceSizeInBits);
- addUInt(*Loc, dwarf::DW_FORM_udata, PieceOffsetInBits);
-
- } else
- llvm_unreachable("unknown DIBuilder Opcode");
- }
-
- // Now attach the location information to the DIE.
- addBlock(Die, Attribute, Loc);
-}
-
/* Byref variables, in Blocks, are declared by the programmer as "SomeType
VarName;", but the compiler creates a __Block_byref_x_VarName struct, and
gives the variable VarName either the struct, or a pointer to the struct, as