[PATCH] [dwarfdump] Pretty print location expressions and location lists

[Frederic Riss]

I reworked it a bit more than just addressing the review comments. Instead of just
offering a pretty-printing function, expose a real class that allows clients to
walk over the expression operations using an iterator interface. The iterator is
a bit strange because of its lazy extraction semantics and the error handling that
goes with it, but I think it looks quite usable. The pretty-printing is then
implemented over that iterator interface.


http://reviews.llvm.org/D6771

Files:
  include/llvm/DebugInfo/DWARFContext.h
  include/llvm/DebugInfo/DWARFDebugLoc.h
  include/llvm/DebugInfo/DWARFExpression.h
  include/llvm/MC/MCRegisterInfo.h
  lib/DebugInfo/CMakeLists.txt
  lib/DebugInfo/DWARFContext.cpp
  lib/DebugInfo/DWARFDebugInfoEntry.cpp
  lib/DebugInfo/DWARFDebugLoc.cpp
  lib/DebugInfo/DWARFExpression.cpp
  lib/MC/MCRegisterInfo.cpp
  test/CodeGen/ARM/2011-01-19-MergedGlobalDbg.ll
  test/CodeGen/ARM/2011-08-02-MergedGlobalDbg.ll
  test/CodeGen/ARM/debug-info-sreg2.ll
  test/CodeGen/X86/2011-01-24-DbgValue-Before-Use.ll
  test/DebugInfo/AArch64/coalescing.ll
  test/DebugInfo/ARM/s-super-register.ll
  test/DebugInfo/SystemZ/variable-loc.ll
  test/DebugInfo/X86/DW_AT_location-reference.ll
  test/DebugInfo/X86/block-capture.ll
  test/DebugInfo/X86/data_member_location.ll
  test/DebugInfo/X86/dbg-merge-loc-entry.ll
  test/DebugInfo/X86/dbg-value-const-byref.ll
  test/DebugInfo/X86/debug-info-blocks.ll
  test/DebugInfo/X86/debug-loc-offset.ll
  test/DebugInfo/X86/fission-cu.ll
  test/DebugInfo/X86/fission-ranges.ll
  test/DebugInfo/X86/op_deref.ll
  test/DebugInfo/X86/parameters.ll
  test/DebugInfo/X86/pieces-1.ll
  test/DebugInfo/X86/pieces-2.ll
  test/DebugInfo/X86/pieces-3.ll
  test/DebugInfo/X86/subregisters.ll
  test/DebugInfo/X86/template.ll
  test/DebugInfo/dwarfdump-debug-loc-simple.test
  test/DebugInfo/incorrect-variable-debugloc1.ll
  tools/llvm-dwarfdump/CMakeLists.txt
  tools/llvm-dwarfdump/llvm-dwarfdump.cpp

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