In Dwarf 3 (and Dwarf 2) attributes whose value are offsets into a
section use the form DW_FORM_data4 whilst in Dwarf 4 and later they
use the form DW_FORM_sec_offset.
This patch updates the places where such attributes are generated to
use the appropriate form depending on the Dwarf version. The DIE entries
affected have the following tags:
DW_AT_stmt_list, DW_AT_ranges, DW_AT_location, DW_AT_GNU_pubnames,
DW_AT_GNU_pubtypes, DW_AT_GNU_addr_base, DW_AT_GNU_ranges_base
It also adds a hidden command line option "--dwarf-version=<uint>"
to llc which allows the version of Dwarf to be generated to override
what is specified in the metadata; this makes it possible to update
existing tests to check the debugging information generated for both
Dwarf 4 (the default) and Dwarf 3 using the same metadata.
Patch (slightly modified) by Keith Walker!
llvm-svn: 195391
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h b/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
index 23d3afc..0821a9a 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
@@ -212,6 +212,14 @@
void addLabel(DIEBlock *Die, dwarf::Form Form, const MCSymbol *Label);
+ /// addSectionLabel - Add a Dwarf section label attribute data and value.
+ ///
+ void addSectionLabel(DIE *Die, dwarf::Attribute Attribute, const MCSymbol *Label);
+
+ /// addSectionOffset - Add an offset into a section attribute data and value.
+ ///
+ void addSectionOffset(DIE *Die, dwarf::Attribute Attribute, uint64_t Integer);
+
/// addLabelAddress - Add a dwarf label attribute data and value using
/// either DW_FORM_addr or DW_FORM_GNU_addr_index.
void addLabelAddress(DIE *Die, dwarf::Attribute Attribute, MCSymbol *Label);
@@ -220,9 +228,9 @@
/// form given and an op of either DW_FORM_addr or DW_FORM_GNU_addr_index.
void addOpAddress(DIEBlock *Die, const MCSymbol *Label);
- /// addDelta - Add a label delta attribute data and value.
- void addDelta(DIE *Die, dwarf::Attribute Attribute, dwarf::Form Form,
- const MCSymbol *Hi, const MCSymbol *Lo);
+ /// addSectionDelta - Add a label delta attribute data and value.
+ void addSectionDelta(DIE *Die, dwarf::Attribute Attribute, const MCSymbol *Hi,
+ const MCSymbol *Lo);
/// addDIEEntry - Add a DIE attribute data and value.
void addDIEEntry(DIE *Die, dwarf::Attribute Attribute, DIE *Entry);