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Sink DwarfUnit::addComplexAddress down into DwarfCompileUnit

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221086 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Blaikie 2014-11-02 06:58:44 +00:00
parent 9e4cbe62b1
commit 1ce60ab99d
4 changed files with 65 additions and 67 deletions
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57
lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
View File

@ -743,4 +743,61 @@ void DwarfCompileUnit::addAddress(DIE &Die, dwarf::Attribute Attribute,
// Now attach the location information to the DIE.
addBlock(Die, Attribute, Loc);
}
/// 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 DwarfCompileUnit::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);
}
} // end llvm namespace

8
lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
View File

@ -199,6 +199,14 @@ public:
/// Add an address attribute to a die based on the location provided.
void addAddress(DIE &Die, dwarf::Attribute Attribute,
const MachineLocation &Location, bool Indirect = false);
/// Start with the address based on the location provided, and generate the
/// DWARF information necessary to find the actual variable (navigating the
/// extra location information encoded in the type) based on the starting
/// location. Add the DWARF information to the die.
void addComplexAddress(const DbgVariable &DV, DIE &Die,
dwarf::Attribute Attribute,
const MachineLocation &Location);
};
} // end llvm namespace

59
lib/CodeGen/AsmPrinter/DwarfUnit.cpp
View File

@ -493,65 +493,6 @@ void DwarfUnit::addRegisterOffset(DIELoc &TheDie, unsigned Reg,
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

8
lib/CodeGen/AsmPrinter/DwarfUnit.h
View File

@ -283,14 +283,6 @@ public:
/// addRegisterOffset - Add register offset.
void addRegisterOffset(DIELoc &TheDie, unsigned Reg, int64_t Offset);
/// addComplexAddress - Start with the address based on the location provided,
/// and generate the DWARF information necessary to find the actual variable
/// (navigating the extra location information encoded in the type) based on
/// the starting location. Add the DWARF information to the die.
void addComplexAddress(const DbgVariable &DV, DIE &Die,
dwarf::Attribute Attribute,
const MachineLocation &Location);
// FIXME: Should be reformulated in terms of addComplexAddress.
/// addBlockByrefAddress - Start with the address based on the location
/// provided, and generate the DWARF information necessary to find the