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Remove generation of DW_AT_sibling. Nothing as far as I can tell uses it.

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Saves about 1.5% on debug info size.

rdar://10278198

llvm-svn: 148794
This commit is contained in:
Eric Christopher 2012-01-24 09:43:28 +00:00
parent 55e4ae9dcd
commit afc99847bf
3 changed files with 0 additions and 26 deletions
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9
lib/CodeGen/AsmPrinter/DIE.cpp
View File

@ -112,15 +112,6 @@ DIE::~DIE() {
delete Children[i];
}
/// addSiblingOffset - Add a sibling offset field to the front of the DIE.
///
DIEValue *DIE::addSiblingOffset(BumpPtrAllocator &A) {
DIEInteger *DI = new (A) DIEInteger(0);
Values.insert(Values.begin(), DI);
Abbrev.AddFirstAttribute(dwarf::DW_AT_sibling, dwarf::DW_FORM_ref4);
return DI;
}
#ifndef NDEBUG
void DIE::print(raw_ostream &O, unsigned IncIndent) {
IndentCount += IncIndent;

10
lib/CodeGen/AsmPrinter/DIE.h
View File

@ -163,16 +163,6 @@ namespace llvm {
Values.push_back(Value);
}
/// SiblingOffset - Return the offset of the debug information entry's
/// sibling.
unsigned getSiblingOffset() const { return Offset + Size; }
/// addSiblingOffset - Add a sibling offset field to the front of the DIE.
/// The caller is responsible for deleting the return value at or after the
/// same time it destroys this DIE.
///
DIEValue *addSiblingOffset(BumpPtrAllocator &A);
/// addChild - Add a child to the DIE.
///
void addChild(DIE *Child) {

7
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -1488,10 +1488,6 @@ DwarfDebug::computeSizeAndOffset(DIE *Die, unsigned Offset, bool Last) {
// Get the children.
const std::vector<DIE *> &Children = Die->getChildren();
// If not last sibling and has children then add sibling offset attribute.
if (!Last && !Children.empty())
Die->addSiblingOffset(DIEValueAllocator);
// Record the abbreviation.
assignAbbrevNumber(Die->getAbbrev());
@ -1602,9 +1598,6 @@ void DwarfDebug::emitDIE(DIE *Die) {
Asm->OutStreamer.AddComment(dwarf::AttributeString(Attr));
switch (Attr) {
case dwarf::DW_AT_sibling:
Asm->EmitInt32(Die->getSiblingOffset());
break;
case dwarf::DW_AT_abstract_origin: {
DIEEntry *E = cast<DIEEntry>(Values[i]);
DIE *Origin = E->getEntry();