DwarfDebug: Allocate DIEValues with a BumpPtrAllocator. Most of them are
POD-like anyway, so we don't even care about calling their d'tors (DIEBlock
being the exception).
~6% less mallocs and ~1% compile time improvement on clang -O0 -g oggenc.c
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100035 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 5cb0e6f..302812f 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -301,15 +301,15 @@
DwarfDebug::DwarfDebug(raw_ostream &OS, AsmPrinter *A, const MCAsmInfo *T)
: DwarfPrinter(OS, A, T), ModuleCU(0),
AbbreviationsSet(InitAbbreviationsSetSize), Abbreviations(),
- DIEValues(), SectionSourceLines(), didInitial(false), shouldEmit(false),
+ DIEBlocks(), SectionSourceLines(), didInitial(false), shouldEmit(false),
CurrentFnDbgScope(0), PrevDILoc(0), DebugTimer(0) {
NextStringPoolNumber = 0;
if (TimePassesIsEnabled)
DebugTimer = new Timer("Dwarf Debug Writer");
}
DwarfDebug::~DwarfDebug() {
- for (unsigned j = 0, M = DIEValues.size(); j < M; ++j)
- delete DIEValues[j];
+ for (unsigned j = 0, M = DIEBlocks.size(); j < M; ++j)
+ DIEBlocks[j]->~DIEBlock();
delete DebugTimer;
}
@@ -349,8 +349,7 @@
/// createDIEEntry - Creates a new DIEEntry to be a proxy for a debug
/// information entry.
DIEEntry *DwarfDebug::createDIEEntry(DIE *Entry) {
- DIEEntry *Value = new DIEEntry(Entry);
- DIEValues.push_back(Value);
+ DIEEntry *Value = new (DIEValueAllocator) DIEEntry(Entry);
return Value;
}
@@ -359,8 +358,7 @@
void DwarfDebug::addUInt(DIE *Die, unsigned Attribute,
unsigned Form, uint64_t Integer) {
if (!Form) Form = DIEInteger::BestForm(false, Integer);
- DIEValue *Value = new DIEInteger(Integer);
- DIEValues.push_back(Value);
+ DIEValue *Value = new (DIEValueAllocator) DIEInteger(Integer);
Die->addValue(Attribute, Form, Value);
}
@@ -369,8 +367,7 @@
void DwarfDebug::addSInt(DIE *Die, unsigned Attribute,
unsigned Form, int64_t Integer) {
if (!Form) Form = DIEInteger::BestForm(true, Integer);
- DIEValue *Value = new DIEInteger(Integer);
- DIEValues.push_back(Value);
+ DIEValue *Value = new (DIEValueAllocator) DIEInteger(Integer);
Die->addValue(Attribute, Form, Value);
}
@@ -378,8 +375,7 @@
/// keeps string reference.
void DwarfDebug::addString(DIE *Die, unsigned Attribute, unsigned Form,
StringRef String) {
- DIEValue *Value = new DIEString(String);
- DIEValues.push_back(Value);
+ DIEValue *Value = new (DIEValueAllocator) DIEString(String);
Die->addValue(Attribute, Form, Value);
}
@@ -387,8 +383,7 @@
///
void DwarfDebug::addLabel(DIE *Die, unsigned Attribute, unsigned Form,
const MCSymbol *Label) {
- DIEValue *Value = new DIELabel(Label);
- DIEValues.push_back(Value);
+ DIEValue *Value = new (DIEValueAllocator) DIELabel(Label);
Die->addValue(Attribute, Form, Value);
}
@@ -396,8 +391,7 @@
///
void DwarfDebug::addDelta(DIE *Die, unsigned Attribute, unsigned Form,
const MCSymbol *Hi, const MCSymbol *Lo) {
- DIEValue *Value = new DIEDelta(Hi, Lo);
- DIEValues.push_back(Value);
+ DIEValue *Value = new (DIEValueAllocator) DIEDelta(Hi, Lo);
Die->addValue(Attribute, Form, Value);
}
@@ -406,7 +400,7 @@
void DwarfDebug::addBlock(DIE *Die, unsigned Attribute, unsigned Form,
DIEBlock *Block) {
Block->ComputeSize(TD);
- DIEValues.push_back(Block);
+ DIEBlocks.push_back(Block); // Memoize so we can call the destructor later on.
Die->addValue(Attribute, Block->BestForm(), Block);
}
@@ -560,7 +554,7 @@
// Decode the original location, and use that as the start of the byref
// variable's location.
unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false);
- DIEBlock *Block = new DIEBlock();
+ DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
if (Location.isReg()) {
if (Reg < 32) {
@@ -700,7 +694,7 @@
// Decode the original location, and use that as the start of the byref
// variable's location.
unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false);
- DIEBlock *Block = new DIEBlock();
+ DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
if (Location.isReg()) {
if (Reg < 32)
@@ -755,7 +749,7 @@
void DwarfDebug::addAddress(DIE *Die, unsigned Attribute,
const MachineLocation &Location) {
unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false);
- DIEBlock *Block = new DIEBlock();
+ DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
if (Location.isReg()) {
if (Reg < 32) {
@@ -1102,7 +1096,7 @@
addSourceLine(MemberDie, &DT);
- DIEBlock *MemLocationDie = new DIEBlock();
+ DIEBlock *MemLocationDie = new (DIEValueAllocator) DIEBlock();
addUInt(MemLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
uint64_t Size = DT.getSizeInBits();
@@ -1138,7 +1132,7 @@
// expression to extract appropriate offset from vtable.
// BaseAddr = ObAddr + *((*ObAddr) - Offset)
- DIEBlock *VBaseLocationDie = new DIEBlock();
+ DIEBlock *VBaseLocationDie = new (DIEValueAllocator) DIEBlock();
addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_dup);
addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
@@ -1204,7 +1198,7 @@
unsigned VK = SP.getVirtuality();
if (VK) {
addUInt(SPDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_flag, VK);
- DIEBlock *Block = new DIEBlock();
+ DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
addUInt(Block, 0, dwarf::DW_FORM_data1, SP.getVirtualIndex());
addBlock(SPDie, dwarf::DW_AT_vtable_elem_location, 0, Block);
@@ -1509,7 +1503,7 @@
VS);
} else if (DbgValueInsn->getOperand(0).getType() ==
MachineOperand::MO_Immediate) {
- DIEBlock *Block = new DIEBlock();
+ DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
unsigned Imm = DbgValueInsn->getOperand(0).getImm();
addUInt(Block, 0, dwarf::DW_FORM_udata, Imm);
addBlock(VariableDie, dwarf::DW_AT_const_value, 0, Block);
@@ -1729,7 +1723,7 @@
DIE *VariableSpecDIE = new DIE(dwarf::DW_TAG_variable);
addDIEEntry(VariableSpecDIE, dwarf::DW_AT_specification,
dwarf::DW_FORM_ref4, VariableDie);
- DIEBlock *Block = new DIEBlock();
+ DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_addr);
addLabel(Block, 0, dwarf::DW_FORM_udata,
Asm->Mang->getSymbol(DI_GV.getGlobal()));
@@ -1737,7 +1731,7 @@
addUInt(VariableDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
ModuleCU->addDie(VariableSpecDIE);
} else {
- DIEBlock *Block = new DIEBlock();
+ DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_addr);
addLabel(Block, 0, dwarf::DW_FORM_udata,
Asm->Mang->getSymbol(DI_GV.getGlobal()));
@@ -2383,7 +2377,7 @@
// If not last sibling and has children then add sibling offset attribute.
if (!Last && !Children.empty())
- DIEValues.push_back(Die->addSiblingOffset());
+ Die->addSiblingOffset(DIEValueAllocator);
// Record the abbreviation.
assignAbbrevNumber(Die->getAbbrev());