On 10/10/2012 08:41 PM, Cary Coutant wrote:
I'm working on a follow-up patch to eliminate the duplicate references to ".LVL" symbols by keeping a direct-lookup table in dwarf2out_var_location. That will eliminate 310,266 of the 312,061 duplicates (99.4%) without using a hash table. With that patch, we'll have only a 22% overhead due to duplicate entries.
That's certainly a big improvement, but 22% still seems worth addressing.
I'm trying to eliminate all .debug_addr entries that could be replaced by an offset relative to either another .debug_addr entry or an address in a range list.
Sounds good.
We use force_direct when we're adding an attribute to a DIE in a skeleton compile unit or type unit (which will be in the .o file). It's false everywhere else (i.e., when the DIE is going into the .dwo file).
Right, so I was thinking that you could distinguish at output time between output going to .o vs .dwo and choose the appropriate addressing form then.
Jason
