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Re: [google/gcc-4_6] More Fission updates (revised) (issue6219049)


On 12-05-22 21:56 , Cary Coutant wrote:
[Revised to address review comments and to fix a bug we found late:
We've changed want_pubnames to a static inline function, and changed
the pubnames output to include (ironically enough) inline functions.]

This patch is for the google/gcc-4_6 branch.

Fission improvements and bug fixes.  Adds new DW_OP_GNU_const_index to
handle TLS offsets in debug info.  Adds -gpubnames/-gno-pubnames options
to explicitly request .debug_pubnames/pubtypes sections.  Adds style
parameter to C/C++ pretty-printer so that we can get canonical pubnames
without affecting diagnostic output.

Bootstrapped and tested on x86_64.


2012-05-21 Sterling Augustine<saugustine@google.com> Cary Coutant<ccoutant@google.com>

include/
	* dwarf2.h: Add DW_OP_GNU_const_index.

gcc/
	* opts.c (finish_options): -gfission implies -gpubnames.
	(common_handle_option): Pass empty arg string to set_debug_level.
	* common.opt (gno-fission): New option.
	(gfission): Remove JoinedOrMissing, add RejectNegative.
	(gno-pubnames, gpubnames): New options.
	* target.def (want_debug_pub_sections): Change default to false.
	* gcc.c (check_live_switch): Check -g options for -gno- options.

	* c-family/c-pretty-print.c (pp_c_specifier_qualifier_list): Add
	support for gnu_v3 style.
	* c-family/c-pretty-print.h (pp_c_flag_gnu_v3): New enum constant.
	* cp/error.c (dump_decl): Add support for gnu_v3 style.
	(decl_as_string): Likewise.
	(lang_decl_name): Likewise.
	* cp/cp-lang.c (cxx_dwarf_name): Likewise.
	* cp/cp-tree.h (enum overload_flags): Add TFF_MATCH_GNU_V3_DEMANGLER.

	* dwarf2out.c (dwarf_stack_op_name): Add DW_OP_GNU_const_index.
	(size_of_loc_descr): Likewise.
	(output_loc_operands): Likewise.
	(output_loc_operands_raw): Likewise.
	(dw_addr_op): New function.
	(new_addr_loc_descr): Call dw_addr_op.
	(want_pubnames): New function.
	(add_AT_pubnames): Add DW_AT_GNU_pubnames/pubtypes only if
	generating .debug_pubnames/pubtypes sections.
	(add_pubname_string): Check for -gpubnames option.
	(add_pubname): Likewise.
	(add_pubtype): Likewise.
	(output_pubnames): Likewise.
	(mem_loc_descriptor): Call new_addr_loc_desc for TLS vars.
	(loc_list_from_tree): Likewise.
	(gen_subprogram_die): Output pubnames for all inlined functions.
	(output_addr_table): Handle DW_OP_GNU_const_index.  Add missing
	newline.
	(hash_loc_operands): Add DW_OP_GNU_const_index.
	(compare_loc_operands): Likewise.

	* testsuite/g++.old-deja/g++.pt/memtemp77.C: Revert earlier change
	to expected results.
	* testsuite/g++.dg/ext/pretty3.C: Likewise.
	* testsuite/g++.dg/warn/Wuninitializable-member.C: Likewise.
	* testsuite/g++.dg/warn/pr35711.C: Likewise.
	* testsuite/g++.dg/pr44486.C: Likewise.

OK with a couple of nits I found on the second read.


@@ -445,6 +445,9 @@ pp_c_specifier_qualifier_list (c_pretty_
  {
    const enum tree_code code = TREE_CODE (t);

+  if (!(pp->flags&  pp_c_flag_gnu_v3)&&  TREE_CODE (t) != POINTER_TYPE)
+    pp_c_type_qualifier_list (pp, t);

You can use 'code' here instead of TREE_CODE(t). Either that, or remove the declaration of 'code' above.


+
    switch (code)
      {
      case REFERENCE_TYPE:
@@ -489,7 +492,7 @@ pp_c_specifier_qualifier_list (c_pretty_
        pp_simple_type_specifier (pp, t);
        break;
      }
-  if (TREE_CODE (t) != POINTER_TYPE)
+  if ((pp->flags&  pp_c_flag_gnu_v3)&&  TREE_CODE (t) != POINTER_TYPE)

Likewise here.


@@ -6589,17 +6595,30 @@ static bool generic_type_p (tree);
  static void schedule_generic_params_dies_gen (tree t);
  static void gen_scheduled_generic_parms_dies (void);

+/* DW_OP_addr is relocated by the debug info consumer, while
+   tls relative operands should not be.  */
+
+static inline enum dwarf_location_atom dw_addr_op (bool dtprel)

Can you describe what DTPREL is used for here?




Diego.


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