[PATCH] Emit DWARF3 call frame information when DWARF3+ debug info is requested

[David Blaikie]

I believe that was Eric signing off on this, which is fine.

My main misgiving is that I'd like to see all this range handling built into a reusable device and reused by both asm and source range building... (ie: the range handling in MCDwarf/MCContext and the range handling in DwarfDebug) one day. :/

http://reviews.llvm.org/D4027