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Refactor. Variables are part of compile unit so let CompileUnit create new variable.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137663 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2011-08-15 22:04:40 +00:00
parent c869b4397a
commit d0b5a5ece4
4 changed files with 129 additions and 123 deletions
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108
lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
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@ -1181,6 +1181,114 @@ void CompileUnit::constructContainingTypeDIEs() {
}
}
/// constructVariableDIE - Construct a DIE for the given DbgVariable.
DIE *CompileUnit::constructVariableDIE(DbgVariable *DV, bool isScopeAbstract) {
StringRef Name = DV->getName();
if (Name.empty())
return NULL;
// Translate tag to proper Dwarf tag.
unsigned Tag = DV->getTag();
// Define variable debug information entry.
DIE *VariableDie = new DIE(Tag);
DbgVariable *AbsVar = DV->getAbstractVariable();
DIE *AbsDIE = AbsVar ? AbsVar->getDIE() : NULL;
if (AbsDIE)
addDIEEntry(VariableDie, dwarf::DW_AT_abstract_origin,
dwarf::DW_FORM_ref4, AbsDIE);
else {
addString(VariableDie, dwarf::DW_AT_name,
dwarf::DW_FORM_string, Name);
addSourceLine(VariableDie, DV->getVariable());
addType(VariableDie, DV->getType());
}
if (DV->isArtificial())
addUInt(VariableDie, dwarf::DW_AT_artificial,
dwarf::DW_FORM_flag, 1);
if (isScopeAbstract) {
DV->setDIE(VariableDie);
return VariableDie;
}
// Add variable address.
unsigned Offset = DV->getDotDebugLocOffset();
if (Offset != ~0U) {
addLabel(VariableDie, dwarf::DW_AT_location,
dwarf::DW_FORM_data4,
Asm->GetTempSymbol("debug_loc", Offset));
DV->setDIE(VariableDie);
return VariableDie;
}
// Check if variable is described by a DBG_VALUE instruction.
if (const MachineInstr *DVInsn = DV->getMInsn()) {
bool updated = false;
if (DVInsn->getNumOperands() == 3) {
if (DVInsn->getOperand(0).isReg()) {
const MachineOperand RegOp = DVInsn->getOperand(0);
const TargetRegisterInfo *TRI = Asm->TM.getRegisterInfo();
if (DVInsn->getOperand(1).isImm() &&
TRI->getFrameRegister(*Asm->MF) == RegOp.getReg()) {
unsigned FrameReg = 0;
const TargetFrameLowering *TFI = Asm->TM.getFrameLowering();
int Offset =
TFI->getFrameIndexReference(*Asm->MF,
DVInsn->getOperand(1).getImm(),
FrameReg);
MachineLocation Location(FrameReg, Offset);
addVariableAddress(DV, VariableDie, Location);
} else if (RegOp.getReg())
addVariableAddress(DV, VariableDie,
MachineLocation(RegOp.getReg()));
updated = true;
}
else if (DVInsn->getOperand(0).isImm())
updated =
addConstantValue(VariableDie, DVInsn->getOperand(0),
DV->getType());
else if (DVInsn->getOperand(0).isFPImm())
updated =
addConstantFPValue(VariableDie, DVInsn->getOperand(0));
else if (DVInsn->getOperand(0).isCImm())
updated =
addConstantValue(VariableDie,
DVInsn->getOperand(0).getCImm(),
DV->getType().isUnsignedDIType());
} else {
addVariableAddress(DV, VariableDie,
Asm->getDebugValueLocation(DVInsn));
updated = true;
}
if (!updated) {
// If variableDie is not updated then DBG_VALUE instruction does not
// have valid variable info.
delete VariableDie;
return NULL;
}
DV->setDIE(VariableDie);
return VariableDie;
} else {
// .. else use frame index.
int FI = DV->getFrameIndex();
if (FI != ~0) {
unsigned FrameReg = 0;
const TargetFrameLowering *TFI = Asm->TM.getFrameLowering();
int Offset =
TFI->getFrameIndexReference(*Asm->MF, FI, FrameReg);
MachineLocation Location(FrameReg, Offset);
addVariableAddress(DV, VariableDie, Location);
}
}
DV->setDIE(VariableDie);
return VariableDie;
}
/// createMemberDIE - Create new member DIE.
DIE *CompileUnit::createMemberDIE(DIDerivedType DT) {
DIE *MemberDie = new DIE(DT.getTag());