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Refactor code. Keep dwarf register operation selection logic at one place.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130231 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2011-04-26 19:06:18 +00:00
parent 1394e6d925
commit 116da2fbe9
2 changed files with 66 additions and 72 deletions
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132
lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
View File

@ -210,6 +210,62 @@ void CompileUnit::addFrameVariableAddress(DbgVariable *&DV, DIE *Die,
addAddress(Die, dwarf::DW_AT_location, Location);
}
/// addRegisterOp - Add register operand.
void CompileUnit::addRegisterOp(DIE *TheDie, unsigned Reg) {
const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
unsigned DWReg = RI->getDwarfRegNum(Reg, false);
if (DWReg < 32)
addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + DWReg);
else {
addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_regx);
addUInt(TheDie, 0, dwarf::DW_FORM_udata, DWReg);
}
}
/// addRegisterOffset - Add register offset.
void CompileUnit::addRegisterOffset(DIE *TheDie, unsigned Reg,
int64_t Offset) {
const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
unsigned DWReg = RI->getDwarfRegNum(Reg, false);
const TargetRegisterInfo *TRI = Asm->TM.getRegisterInfo();
if (Reg == TRI->getFrameRegister(*Asm->MF))
// If variable offset is based in frame register then use fbreg.
addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_fbreg);
else if (DWReg < 32)
addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + DWReg);
else {
addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx);
addUInt(TheDie, 0, dwarf::DW_FORM_udata, DWReg);
}
addSInt(TheDie, 0, dwarf::DW_FORM_sdata, Offset);
}
/// addAddress - Add an address attribute to a die based on the location
/// provided.
void CompileUnit::addAddress(DIE *Die, unsigned Attribute,
const MachineLocation &Location) {
DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
if (Location.isReg())
addRegisterOp(Block, Location.getReg());
else
addRegisterOffset(Block, Location.getReg(), Location.getOffset());
// Now attach the location information to the DIE.
addBlock(Die, Attribute, 0, Block);
}
/// addRegisterAddress - Add register location entry in variable DIE.
bool CompileUnit::addRegisterAddress(DIE *Die, const MachineOperand &MO) {
assert (MO.isReg() && "Invalid machine operand!");
if (!MO.getReg())
return false;
MachineLocation Location;
Location.set(MO.getReg());
addAddress(Die, dwarf::DW_AT_location, Location);
return true;
}
/// 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 DIVariable, starting from
@ -218,31 +274,12 @@ void CompileUnit::addFrameVariableAddress(DbgVariable *&DV, DIE *Die,
void CompileUnit::addComplexAddress(DbgVariable *&DV, DIE *Die,
unsigned Attribute,
const MachineLocation &Location) {
DIType Ty = DV->getType();
// Decode the original location, and use that as the start of the byref
// variable's location.
const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false);
DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
if (Location.isReg()) {
if (Reg < 32) {
addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + Reg);
} else {
addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_regx);
addUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
}
} else {
if (Reg < 32)
addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + Reg);
else {
addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx);
addUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
}
addUInt(Block, 0, dwarf::DW_FORM_sdata, Location.getOffset());
}
if (Location.isReg())
addRegisterOp(Block, Location.getReg());
else
addRegisterOffset(Block, Location.getReg(), Location.getOffset());
for (unsigned i = 0, N = DV->getNumAddrElements(); i < N; ++i) {
uint64_t Element = DV->getAddrElement(i);
@ -412,55 +449,6 @@ void CompileUnit::addBlockByrefAddress(DbgVariable *&DV, DIE *Die,
addBlock(Die, Attribute, 0, Block);
}
/// addAddress - Add an address attribute to a die based on the location
/// provided.
void CompileUnit::addAddress(DIE *Die, unsigned Attribute,
const MachineLocation &Location) {
const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false);
DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
if (RI->getFrameRegister(*Asm->MF) == Location.getReg()
&& Location.getOffset()) {
// If variable offset is based in frame register then use fbreg.
addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_fbreg);
addSInt(Block, 0, dwarf::DW_FORM_sdata, Location.getOffset());
addBlock(Die, Attribute, 0, Block);
return;
}
if (Location.isReg()) {
if (Reg < 32) {
addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + Reg);
} else {
addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_regx);
addUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
}
} else {
if (Reg < 32) {
addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + Reg);
} else {
addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx);
addUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
}
addUInt(Block, 0, dwarf::DW_FORM_sdata, Location.getOffset());
}
addBlock(Die, Attribute, 0, Block);
}
/// addRegisterAddress - Add register location entry in variable DIE.
bool CompileUnit::addRegisterAddress(DIE *Die, const MachineOperand &MO) {
assert (MO.isReg() && "Invalid machine operand!");
if (!MO.getReg())
return false;
MachineLocation Location;
Location.set(MO.getReg());
addAddress(Die, dwarf::DW_AT_location, Location);
return true;
}
/// addConstantValue - Add constant value entry in variable DIE.
bool CompileUnit::addConstantValue(DIE *Die, const MachineOperand &MO) {
assert (MO.isImm() && "Invalid machine operand!");

6
lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
View File

@ -194,6 +194,12 @@ public:
/// addTemplateParams - Add template parameters in buffer.
void addTemplateParams(DIE &Buffer, DIArray TParams);
/// addRegisterOp - Add register operand.
void addRegisterOp(DIE *TheDie, unsigned Reg);
/// addRegisterOffset - Add register offset.
void addRegisterOffset(DIE *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