DW_AT_stmt_list attribute attached with a compile unit encodes offset of line number information for this compile unit in debug_line section. This offset is always zero when only one compile unit is emitted in a object file.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99223 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DIE.cpp b/lib/CodeGen/AsmPrinter/DIE.cpp
index 141c80b..cb2fe47 100644
--- a/lib/CodeGen/AsmPrinter/DIE.cpp
+++ b/lib/CodeGen/AsmPrinter/DIE.cpp
@@ -278,31 +278,6 @@
#endif
//===----------------------------------------------------------------------===//
-// DIESectionOffset Implementation
-//===----------------------------------------------------------------------===//
-
-/// EmitValue - Emit delta value.
-///
-void DIESectionOffset::EmitValue(DwarfPrinter *D, unsigned Form) const {
- bool IsSmall = Form == dwarf::DW_FORM_data4;
- D->EmitSectionOffset(Label, Section, IsSmall, IsEH);
-}
-
-/// SizeOf - Determine size of delta value in bytes.
-///
-unsigned DIESectionOffset::SizeOf(const TargetData *TD, unsigned Form) const {
- if (Form == dwarf::DW_FORM_data4) return 4;
- return TD->getPointerSize();
-}
-
-#ifndef NDEBUG
-void DIESectionOffset::print(raw_ostream &O) {
- O << "Off: " << Label->getName() << "-" << Section->getName()
- << "-" << IsEH;
-}
-#endif
-
-//===----------------------------------------------------------------------===//
// DIEDelta Implementation
//===----------------------------------------------------------------------===//
diff --git a/lib/CodeGen/AsmPrinter/DIE.h b/lib/CodeGen/AsmPrinter/DIE.h
index 1a41e28..4ba40aa 100644
--- a/lib/CodeGen/AsmPrinter/DIE.h
+++ b/lib/CodeGen/AsmPrinter/DIE.h
@@ -330,38 +330,6 @@
};
//===--------------------------------------------------------------------===//
- /// DIESectionOffset - A section offset DIE.
- ///
- class DIESectionOffset : public DIEValue {
- const MCSymbol *Label;
- const MCSymbol *Section;
- bool IsEH : 1;
- public:
- DIESectionOffset(const MCSymbol *Lab, const MCSymbol *Sec,
- bool isEH = false)
- : DIEValue(isSectionOffset), Label(Lab), Section(Sec),
- IsEH(isEH) {}
-
- /// EmitValue - Emit section offset.
- ///
- virtual void EmitValue(DwarfPrinter *D, unsigned Form) const;
-
- /// SizeOf - Determine size of section offset value in bytes.
- ///
- virtual unsigned SizeOf(const TargetData *TD, unsigned Form) const;
-
- // Implement isa/cast/dyncast.
- static bool classof(const DIESectionOffset *) { return true; }
- static bool classof(const DIEValue *D) {
- return D->getType() == isSectionOffset;
- }
-
-#ifndef NDEBUG
- virtual void print(raw_ostream &O);
-#endif
- };
-
- //===--------------------------------------------------------------------===//
/// DIEDelta - A simple label difference DIE.
///
class DIEDelta : public DIEValue {
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index c935d3a..83cac79 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -386,16 +386,6 @@
Die->addValue(Attribute, Form, Value);
}
-/// addSectionOffset - Add a section offset label attribute data and value.
-///
-void DwarfDebug::addSectionOffset(DIE *Die, unsigned Attribute, unsigned Form,
- const MCSymbol *Label,const MCSymbol *Section,
- bool isEH) {
- DIEValue *Value = new DIESectionOffset(Label, Section, isEH);
- DIEValues.push_back(Value);
- Die->addValue(Attribute, Form, Value);
-}
-
/// addDelta - Add a label delta attribute data and value.
///
void DwarfDebug::addDelta(DIE *Die, unsigned Attribute, unsigned Form,
@@ -1666,10 +1656,10 @@
unsigned ID = GetOrCreateSourceID(Dir, FN);
DIE *Die = new DIE(dwarf::DW_TAG_compile_unit);
- // FIXME: Why getting the delta between two identical labels??
- addSectionOffset(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4,
- getTempLabel("section_line"), getTempLabel("section_line"),
- false);
+ // DW_AT_stmt_list is a offset of line number information for this
+ // compile unit in debug_line section. It is always zero when only one
+ // compile unit is emitted in one object file.
+ addUInt(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4, 0);
addString(Die, dwarf::DW_AT_producer, dwarf::DW_FORM_string,
DIUnit.getProducer());
addUInt(Die, dwarf::DW_AT_language, dwarf::DW_FORM_data1,
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.h b/lib/CodeGen/AsmPrinter/DwarfDebug.h
index d6634e1..6004bb3 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -250,12 +250,6 @@
void addLabel(DIE *Die, unsigned Attribute, unsigned Form,
const MCSymbol *Label);
- /// addSectionOffset - Add a section offset label attribute data and value.
- ///
- void addSectionOffset(DIE *Die, unsigned Attribute, unsigned Form,
- const MCSymbol *Label, const MCSymbol *Section,
- bool isEH = false);
-
/// addDelta - Add a label delta attribute data and value.
///
void addDelta(DIE *Die, unsigned Attribute, unsigned Form,