llvm-6502/lib/MC
Ulrich Weigand 4df4bccc71 [MC/DWARF] Generate multiple .debug_line entries for adjacent .loc directives
The compiler occasionally generates multiple .loc directives in a row
(at the same instruction address).  These need to be transformed into
multple actual .debug_line table entries, since they are used to signal
certain information to the debugger (e.g. if the opening brace of a
function body is on the same line as the declaration).

The MCAsmStreamer version of EmitDwarfLocDirective handles this
correctly by emitting a .loc directive every time it is called.
However, the MCObjectStream version simply defaults to recording
the information and emitting only a single table entry later,
e.g. when EmitInstruction is called.

This patch introduces a MCAsmStreamer::EmitDwarfLocDirective
version that emits a line table entry for a .loc directive
that may already be pending before recording the new directive.
(This is similar to how this is handled in GNU as.)

With this patch (and the code alignment factor patch) applied,
I'm now getting identical DWARF .debug sections for all test-suite
object files on PowerPC for the internal and the external assembler.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184357 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-19 21:27:27 +00:00
..
MCDisassembler Use pointers to the MCAsmInfo and MCRegInfo. 2013-06-18 07:20:20 +00:00
MCParser Use pointers to the MCAsmInfo and MCRegInfo. 2013-06-18 07:20:20 +00:00
CMakeLists.txt MC: Disassembled CFG reconstruction. 2013-05-24 01:07:04 +00:00
ELFObjectWriter.cpp Remove MCELFObjectTargetWriter::adjustFixupOffset hack 2013-05-15 15:07:42 +00:00
LLVMBuild.txt
MachObjectWriter.cpp
Makefile
MCAsmBackend.cpp
MCAsmInfo.cpp [MC/DWARF] Support .debug_frame / .debug_line code alignment factors 2013-06-12 14:46:54 +00:00
MCAsmInfoCOFF.cpp Remove unused DwarfSectionOffsetDirective string 2013-04-22 22:49:11 +00:00
MCAsmInfoDarwin.cpp
MCAsmStreamer.cpp Use pointers to the MCAsmInfo and MCRegInfo. 2013-06-18 07:20:20 +00:00
MCAssembler.cpp [MC/DWARF] Support .debug_frame / .debug_line code alignment factors 2013-06-12 14:46:54 +00:00
MCAtom.cpp MC: Disassembled CFG reconstruction. 2013-05-24 01:07:04 +00:00
MCCodeEmitter.cpp
MCCodeGenInfo.cpp
MCContext.cpp Use pointers to the MCAsmInfo and MCRegInfo. 2013-06-18 07:20:20 +00:00
MCDisassembler.cpp Follow up of the introduction of MCSymbolizer. 2013-05-24 22:51:52 +00:00
MCDwarf.cpp Use pointers to the MCAsmInfo and MCRegInfo. 2013-06-18 07:20:20 +00:00
MCELF.cpp
MCELFObjectTargetWriter.cpp Cleanup relocation sorting for ELF. 2013-05-15 18:22:01 +00:00
MCELFStreamer.cpp
MCExpr.cpp [PowerPC] Clean up generation of ha16() / lo16() markers 2013-05-23 22:26:41 +00:00
MCExternalSymbolizer.cpp Follow up of the introduction of MCSymbolizer. 2013-05-24 22:51:52 +00:00
MCFunction.cpp MC: Disassembled CFG reconstruction. 2013-05-24 01:07:04 +00:00
MCInst.cpp
MCInstPrinter.cpp
MCInstrAnalysis.cpp MC: Disassembled CFG reconstruction. 2013-05-24 01:07:04 +00:00
MCLabel.cpp
MCMachObjectTargetWriter.cpp
MCMachOStreamer.cpp
MCModule.cpp Allow creation of single-byte MCAtoms. 2013-06-19 20:18:59 +00:00
MCNullStreamer.cpp
MCObjectDisassembler.cpp Allow creation of single-byte MCAtoms. 2013-06-19 20:18:59 +00:00
MCObjectFileInfo.cpp [SystemZ] Update non-pic DWARF encodings 2013-05-06 17:28:30 +00:00
MCObjectStreamer.cpp [MC/DWARF] Generate multiple .debug_line entries for adjacent .loc directives 2013-06-19 21:27:27 +00:00
MCObjectSymbolizer.cpp Remove debug print added in r182949. 2013-05-30 23:46:47 +00:00
MCObjectWriter.cpp
MCPureStreamer.cpp
MCRegisterInfo.cpp Make SubRegIndex size mandatory, following r183020. 2013-05-31 23:45:26 +00:00
MCRelocationInfo.cpp Follow up of the introduction of MCSymbolizer. 2013-05-24 22:51:52 +00:00
MCSection.cpp
MCSectionCOFF.cpp
MCSectionELF.cpp
MCSectionMachO.cpp
MCStreamer.cpp Use pointers to the MCAsmInfo and MCRegInfo. 2013-06-18 07:20:20 +00:00
MCSubtargetInfo.cpp
MCSymbol.cpp
MCSymbolizer.cpp Add MCSymbolizer for symbolic/annotated disassembly. 2013-05-24 00:39:57 +00:00
MCValue.cpp
MCWin64EH.cpp
SubtargetFeature.cpp
WinCOFFObjectWriter.cpp COFF: Fix weak external aliases. 2013-04-22 18:48:56 +00:00
WinCOFFStreamer.cpp