[PATCH] Support for generating DWARF .debug_aranges sections.

[Richard Mitton]

This patch enables LLVM to generate a DWARF .debug_aranges section.

Previously LLVM would simply not generate any data for this (or would rely on a tool like dsymutil to do it instead). This patch allows debuggers to use this data to accelerate file loading.

I really have no idea what I'm doing with regards to LLVM's internals, so someone more knowledgeable should definitely review this.


http://llvm-reviews.chandlerc.com/D1649

Files:
  include/llvm/MC/MCELFStreamer.h
  include/llvm/MC/MCStreamer.h
  include/llvm/Support/Dwarf.h
  lib/CodeGen/AsmPrinter/AsmPrinter.cpp
  lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
  lib/CodeGen/AsmPrinter/DwarfDebug.cpp
  lib/CodeGen/AsmPrinter/DwarfDebug.h
  lib/MC/MCAsmStreamer.cpp
  lib/MC/MCELFStreamer.cpp
  lib/MC/MCMachOStreamer.cpp
  lib/MC/MCNullStreamer.cpp
  lib/MC/MCPureStreamer.cpp
  lib/MC/MCStreamer.cpp
  lib/MC/WinCOFFStreamer.cpp
  lib/Target/AArch64/MCTargetDesc/AArch64ELFStreamer.cpp
  lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
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