[RFC] More compact (100x) -g3 .debug_macinfo (take 3)

[Richard Henderson]

On 07/15/2011 01:58 PM, Jakub Jelinek wrote:
> 	* dwarf2.h (DW_MACINFO_lo_user, DW_MACINFO_hi_user): Add.
> 	(DW_MACINFO_GNU_define_indirect, DW_MACINFO_GNU_undef_indirect,
> 	DW_MACINFO_GNU_transparent_include, DW_MACINFO_GNU_define_opcode):
> 	Add.
> 
> 	* dwarf2out.c (dwarf2out_define): If the vector is empty and
> 	lineno is 0, emit a dummy entry first.
> 	(dwarf2out_undef): Likewise.  Remove redundant semicolon.
> 	(htab_macinfo_hash, htab_macinfo_eq, output_macinfo_op,
> 	optimize_macinfo_range): New functions.
> 	(output_macinfo): Use them.  If !dwarf_strict and .debug_str is
> 	mergeable, optimize longer strings using
> 	DW_MACINFO_GNU_{define,undef}_indirect and if HAVE_COMDAT_GROUP,
> 	optimize longer sequences of define/undef ops from headers
> 	using DW_MACINFO_GNU_transparent_include.

This looks much better.  Barring any other feedback from
other interested Dwarf parties, I think this can go in.


r~