+2016-09-28 Richard Biener <rguenther@suse.de>
+
+ * dwarf2out.c (struct die_struct): Add removed flag.
+ (lookup_type_die): If the DIE is marked as removed, clear
+ TYPE_SYMTAB_DIE and return NULL.
+ (lookup_decl_die): If the DIE is marked as removed, remove it
+ from the hash and return NULL.
+ (mark_removed): New helper.
+ (prune_unused_types_prune): Call it for removed DIEs.
+ (gen_subprogram_die): Move the premark_used_types call to after
+ DIEs for the functions scopes are generated.
+ (process_scope_var): Do not re-create pruned types or type decls.
+ Make sure to also re-parent type decls.
+ (dwarf2out_finish): Move unused type pruning and debug_types
+ handling ...
+ (dwarf2out_early_finish): ... here.
+
2016-09-29 Claudiu Zissulescu <claziss@synopsys.com>
* config/arc/arc-c.c: New file.
/* Die is used and must not be pruned as unused. */
BOOL_BITFIELD die_perennial_p : 1;
BOOL_BITFIELD comdat_type_p : 1; /* DIE has a type signature */
+ /* Whether this DIE was removed from the DIE tree, for example via
+ prune_unused_types. We don't consider those present from the
+ DIE lookup routines. */
+ BOOL_BITFIELD removed : 1;
/* Lots of spare bits. */
}
die_node;
static inline dw_die_ref
lookup_type_die (tree type)
{
- return TYPE_SYMTAB_DIE (type);
+ dw_die_ref die = TYPE_SYMTAB_DIE (type);
+ if (die && die->removed)
+ {
+ TYPE_SYMTAB_DIE (type) = NULL;
+ return NULL;
+ }
+ return die;
}
/* Given a TYPE_DIE representing the type TYPE, if TYPE is an
static inline dw_die_ref
lookup_decl_die (tree decl)
{
- return decl_die_table->find_with_hash (decl, DECL_UID (decl));
+ dw_die_ref *die = decl_die_table->find_slot_with_hash (decl, DECL_UID (decl),
+ NO_INSERT);
+ if (!die)
+ return NULL;
+ if ((*die)->removed)
+ {
+ decl_die_table->clear_slot (die);
+ return NULL;
+ }
+ return *die;
}
/* Returns a hash value for X (which really is a var_loc_list). */
int declaration = (current_function_decl != decl
|| class_or_namespace_scope_p (context_die));
- premark_used_types (DECL_STRUCT_FUNCTION (decl));
-
/* Now that the C++ front end lazily declares artificial member fns, we
might need to retrofit the declaration into its class. */
if (!declaration && !origin && !old_die
call_site_count = -1;
tail_call_site_count = -1;
}
+
+ /* Mark used types after we have created DIEs for the functions scopes. */
+ premark_used_types (DECL_STRUCT_FUNCTION (decl));
}
/* Returns a hash value for X (which really is a die_struct). */
if (TREE_CODE (decl_or_origin) == FUNCTION_DECL)
die = lookup_decl_die (decl_or_origin);
- else if (TREE_CODE (decl_or_origin) == TYPE_DECL
- && TYPE_DECL_IS_STUB (decl_or_origin))
- die = lookup_type_die (TREE_TYPE (decl_or_origin));
+ else if (TREE_CODE (decl_or_origin) == TYPE_DECL)
+ {
+ if (TYPE_DECL_IS_STUB (decl_or_origin))
+ die = lookup_type_die (TREE_TYPE (decl_or_origin));
+ else
+ die = lookup_decl_die (decl_or_origin);
+ /* Avoid re-creating the DIE late if it was optimized as unused early. */
+ if (! die && ! early_dwarf)
+ return;
+ }
else
die = NULL;
}
}
+/* Mark DIE and its children as removed. */
+
+static void
+mark_removed (dw_die_ref die)
+{
+ dw_die_ref c;
+ die->removed = true;
+ FOR_EACH_CHILD (die, c, mark_removed (c));
+}
+
/* Remove from the tree DIE any dies that aren't marked. */
static void
die->die_child = prev;
}
c->die_sib = NULL;
+ mark_removed (c);
return;
}
else
{
next = c->die_sib;
c->die_sib = NULL;
+ mark_removed (c);
}
if (c != prev->die_sib)
resolve_addr (comp_unit_die ());
move_marked_base_types ();
- if (flag_eliminate_unused_debug_types)
- prune_unused_types ();
-
- /* Generate separate COMDAT sections for type DIEs. */
- if (use_debug_types)
- {
- break_out_comdat_types (comp_unit_die ());
-
- /* Each new type_unit DIE was added to the limbo die list when created.
- Since these have all been added to comdat_type_list, clear the
- limbo die list. */
- limbo_die_list = NULL;
-
- /* For each new comdat type unit, copy declarations for incomplete
- types to make the new unit self-contained (i.e., no direct
- references to the main compile unit). */
- for (ctnode = comdat_type_list; ctnode != NULL; ctnode = ctnode->next)
- copy_decls_for_unworthy_types (ctnode->root_die);
- copy_decls_for_unworthy_types (comp_unit_die ());
-
- /* In the process of copying declarations from one unit to another,
- we may have left some declarations behind that are no longer
- referenced. Prune them. */
- prune_unused_types ();
- }
-
/* Generate separate CUs for each of the include files we've seen.
They will go into limbo_die_list. */
if (flag_eliminate_dwarf2_dups)
}
deferred_asm_name = NULL;
+ if (flag_eliminate_unused_debug_types)
+ prune_unused_types ();
+
+ /* Generate separate COMDAT sections for type DIEs. */
+ if (use_debug_types)
+ {
+ break_out_comdat_types (comp_unit_die ());
+
+ /* Each new type_unit DIE was added to the limbo die list when created.
+ Since these have all been added to comdat_type_list, clear the
+ limbo die list. */
+ limbo_die_list = NULL;
+
+ /* For each new comdat type unit, copy declarations for incomplete
+ types to make the new unit self-contained (i.e., no direct
+ references to the main compile unit). */
+ for (comdat_type_node *ctnode = comdat_type_list;
+ ctnode != NULL; ctnode = ctnode->next)
+ copy_decls_for_unworthy_types (ctnode->root_die);
+ copy_decls_for_unworthy_types (comp_unit_die ());
+
+ /* In the process of copying declarations from one unit to another,
+ we may have left some declarations behind that are no longer
+ referenced. Prune them. */
+ prune_unused_types ();
+ }
+
/* The early debug phase is now finished. */
early_dwarf_finished = true;
}
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