make llvm-dwarfdump a little more resilient when parsing .debug_loc
sections. The call to data.getUnsigned(&Offset, AddressSize) only
increments Offset if the read succeeds, which will result in an infinite
loop.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201179 91177308-0d34-0410-b5e6-96231b3b80d8
Debug info: Emit values in subregisters that do not have a separate
DWARF register number by emitting a super-register + DW_OP_bit_piece.
This is necessary because on x86_64, there are no DWARF register numbers
for i386-style subregisters.
Fixes a bunch of FIXMEs.

rdar://problem/16015314

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201180 91177308-0d34-0410-b5e6-96231b3b80d8
whitespace

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201181 91177308-0d34-0410-b5e6-96231b3b80d8