[Bug gdb/9978] New: DW_OP_bit_piece does not allow DW_OP_reg

["hubicka at gcc dot gnu dot org" <sourceware-bugzilla at sourceware dot org>]

DW_op_reg in DW_OP_bit_piece is refused:
DWARF-2 expression error: DW_OP_reg operations must be used either alone or in
conjuction with DW_OP_piece.

I believe it is wrong, since DW_OP_bit_piece has same restrictions as
DW_OP_piece.  I would like to use DW_OP_bit_piece in GCC to output SRAed
structures, so it would be cool to fix this ;)

-- 
           Summary: DW_OP_bit_piece does not allow DW_OP_reg
           Product: gdb
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gdb
        AssignedTo: unassigned at sourceware dot org
        ReportedBy: hubicka at gcc dot gnu dot org
                CC: gdb-prs at sourceware dot org
  GCC host triplet: x86_64-pc-linux-gnu


http://sourceware.org/bugzilla/show_bug.cgi?id=9978

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