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re PR ipa/87957 (ICE tree check: expected tree that contains ‘decl minimal’ structure, have ‘identifier_node’ in warn_odr, at ipa-devirt.c:1051 since r265519)

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PR lto/87957
	* tree.c (fld_decl_context): Break out from ...
	(free_lang_data_in_decl): ... here; free TREE_PUBLIC, TREE_PRIVATE
	DECL_ARTIFICIAL of TYPE_DECL; do not free TREE_TYPE of TYPE_DECL.
	(fld_incomplete_type_of): Build copy of TYP_DECL.
	* ipa-devirt.c (free_enum_values): Rename to ...
	(free_odr_warning_data): ... this one; free also duplicated TYPE_DECLs
	and TREE_TYPEs of TYPE_DECLs.
	(get_odr_type): Initialize odr_vtable_hash if needed.

From-SVN: r266350
This commit is contained in:
Jan Hubicka 2018-11-21 18:31:19 +01:00 • committed by Jan Hubicka
parent 6bdb055ea8
commit 7424b7c139
3 changed files with 105 additions and 46 deletions
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12
gcc/ChangeLog
View file

@ -1,3 +1,15 @@
2018-11-21 Jan Hubicka <jh@suse.cz>
PR lto/87957
* tree.c (fld_decl_context): Break out from ...
(free_lang_data_in_decl): ... here; free TREE_PUBLIC, TREE_PRIVATE
DECL_ARTIFICIAL of TYPE_DECL; do not free TREE_TYPE of TYPE_DECL.
(fld_incomplete_type_of): Build copy of TYP_DECL.
* ipa-devirt.c (free_enum_values): Rename to ...
(free_odr_warning_data): ... this one; free also duplicated TYPE_DECLs
and TREE_TYPEs of TYPE_DECLs.
(get_odr_type): Initialize odr_vtable_hash if needed.
2018-11-21 Alexandre Oliva <oliva@adacore.com>
* final.c (compute_discriminator): Declare. Renamed from...

46
gcc/ipa-devirt.c
View file

@ -2025,6 +2025,8 @@ get_odr_type (tree type, bool insert)
if ((!slot || !*slot) && in_lto_p && can_be_vtable_hashed_p (type))
{
hash = hash_odr_vtable (type);
if (!odr_vtable_hash)
odr_vtable_hash = new odr_vtable_hash_type (23);
vtable_slot = odr_vtable_hash->find_slot_with_hash (type, hash,
insert ? INSERT : NO_INSERT);
}
@ -2289,27 +2291,43 @@ dump_type_inheritance_graph (FILE *f)
"%i duplicates overall\n", num_all_types, num_types, num_duplicates);
}
/* Save some WPA->ltrans streaming by freeing enum values. */
/* Save some WPA->ltrans streaming by freeing stuff needed only for good
ODR warnings.
We free TYPE_VALUES of enums and also make TYPE_DECLs to not point back
to the type (which is needed to keep them in the same SCC and preserve
location information to output warnings) and subsequently we make all
TYPE_DECLS of same assembler name equivalent. */
static void
free_enum_values ()
free_odr_warning_data ()
{
static bool enum_values_freed = false;
if (enum_values_freed || !flag_wpa || !odr_types_ptr)
static bool odr_data_freed = false;
if (odr_data_freed || !flag_wpa || !odr_types_ptr)
return;
enum_values_freed = true;
unsigned int i;
for (i = 0; i < odr_types.length (); i++)
odr_data_freed = true;
for (unsigned int i = 0; i < odr_types.length (); i++)
if (odr_types[i])
{
if (TREE_CODE (odr_types[i]->type) == ENUMERAL_TYPE)
TYPE_VALUES (odr_types[i]->type) = NULL;
tree t = odr_types[i]->type;
if (TREE_CODE (t) == ENUMERAL_TYPE)
TYPE_VALUES (t) = NULL;
TREE_TYPE (TYPE_NAME (t)) = void_type_node;
if (odr_types[i]->types)
for (unsigned int j = 0; j < odr_types[i]->types->length (); j++)
if (TREE_CODE ((*odr_types[i]->types)[j]) == ENUMERAL_TYPE)
TYPE_VALUES ((*odr_types[i]->types)[j]) = NULL;
{
tree td = (*odr_types[i]->types)[j];
if (TREE_CODE (td) == ENUMERAL_TYPE)
TYPE_VALUES (td) = NULL;
TYPE_NAME (td) = TYPE_NAME (t);
}
}
enum_values_freed = true;
odr_data_freed = true;
}
/* Initialize IPA devirt and build inheritance tree graph. */
@ -2323,7 +2341,7 @@ build_type_inheritance_graph (void)
if (odr_hash)
{
free_enum_values ();
free_odr_warning_data ();
return;
}
timevar_push (TV_IPA_INHERITANCE);
@ -2370,7 +2388,7 @@ build_type_inheritance_graph (void)
dump_type_inheritance_graph (inheritance_dump_file);
dump_end (TDI_inheritance, inheritance_dump_file);
}
free_enum_values ();
free_odr_warning_data ();
timevar_pop (TV_IPA_INHERITANCE);
}

93
gcc/tree.c
View file

@ -5206,6 +5206,24 @@ fld_process_array_type (tree t, tree t2, hash_map<tree, tree> *map,
return array;
}
/* Return CTX after removal of contexts that are not relevant */
static tree
fld_decl_context (tree ctx)
{
/* Variably modified types are needed for tree_is_indexable to decide
whether the type needs to go to local or global section.
This code is semi-broken but for now it is easiest to keep contexts
as expected. */
if (ctx && TYPE_P (ctx)
&& !variably_modified_type_p (ctx, NULL_TREE))
{
while (ctx && TYPE_P (ctx))
ctx = TYPE_CONTEXT (ctx);
}
return ctx;
}
/* For T being aggregate type try to turn it into a incomplete variant.
Return T if no simplification is possible. */
@ -5267,6 +5285,28 @@ fld_incomplete_type_of (tree t, struct free_lang_data_d *fld)
}
else
TYPE_VALUES (copy) = NULL;
/* Build copy of TYPE_DECL in TYPE_NAME if necessary.
This is needed for ODR violation warnings to come out right (we
want duplicate TYPE_DECLs whenever the type is duplicated because
of ODR violation. Because lang data in the TYPE_DECL may not
have been freed yet, rebuild it from scratch and copy relevant
fields. */
TYPE_NAME (copy) = fld_simplified_type_name (copy);
tree name = TYPE_NAME (copy);
if (name && TREE_CODE (name) == TYPE_DECL)
{
gcc_checking_assert (TREE_TYPE (name) == t);
tree name2 = build_decl (DECL_SOURCE_LOCATION (name), TYPE_DECL,
DECL_NAME (name), copy);
if (DECL_ASSEMBLER_NAME_SET_P (name))
SET_DECL_ASSEMBLER_NAME (name2, DECL_ASSEMBLER_NAME (name));
SET_DECL_ALIGN (name2, 0);
DECL_CONTEXT (name2) = fld_decl_context
(DECL_CONTEXT (name));
TYPE_NAME (copy) = name2;
}
}
return copy;
}
@ -5423,7 +5463,8 @@ free_lang_data_in_type (tree type, struct free_lang_data_d *fld)
if (TREE_CODE (type) == ENUMERAL_TYPE)
{
/* Type values are used only for C++ ODR checking. Drop them
for all type variants and non-ODR types. */
for all type variants and non-ODR types.
For ODR types the data is freed in free_odr_warning_data. */
if (TYPE_MAIN_VARIANT (type) != type
|| !type_with_linkage_p (type))
TYPE_VALUES (type) = NULL;
@ -5455,11 +5496,7 @@ free_lang_data_in_type (tree type, struct free_lang_data_d *fld)
TYPE_CONTEXT (type) = ctx;
}
/* Drop TYPE_DECLs in TYPE_NAME in favor of the identifier in the
TYPE_DECL if the type doesn't have linkage.
this must match fld_ */
if (type != TYPE_MAIN_VARIANT (type) || ! type_with_linkage_p (type))
TYPE_STUB_DECL (type) = NULL;
TYPE_STUB_DECL (type) = NULL;
TYPE_NAME (type) = fld_simplified_type_name (type);
}
@ -5486,16 +5523,19 @@ need_assembler_name_p (tree decl)
e.g. -fno-signed-char/-fsigned-char mismatches to be handled well.
See cp/mangle.c:write_builtin_type for details. */
if (flag_lto_odr_type_mering
&& TREE_CODE (decl) == TYPE_DECL
&& DECL_NAME (decl)
&& decl == TYPE_NAME (TREE_TYPE (decl))
&& TYPE_MAIN_VARIANT (TREE_TYPE (decl)) == TREE_TYPE (decl)
&& !TYPE_ARTIFICIAL (TREE_TYPE (decl))
&& (type_with_linkage_p (TREE_TYPE (decl))
|| TREE_CODE (TREE_TYPE (decl)) == INTEGER_TYPE)
&& !variably_modified_type_p (TREE_TYPE (decl), NULL_TREE))
return !DECL_ASSEMBLER_NAME_SET_P (decl);
if (TREE_CODE (decl) == TYPE_DECL)
{
if (flag_lto_odr_type_mering
&& DECL_NAME (decl)
&& decl == TYPE_NAME (TREE_TYPE (decl))
&& TYPE_MAIN_VARIANT (TREE_TYPE (decl)) == TREE_TYPE (decl)
&& !TYPE_ARTIFICIAL (TREE_TYPE (decl))
&& (type_with_linkage_p (TREE_TYPE (decl))
|| TREE_CODE (TREE_TYPE (decl)) == INTEGER_TYPE)
&& !variably_modified_type_p (TREE_TYPE (decl), NULL_TREE))
return !DECL_ASSEMBLER_NAME_SET_P (decl);
return false;
}
/* Only FUNCTION_DECLs and VAR_DECLs are considered. */
if (!VAR_OR_FUNCTION_DECL_P (decl))
return false;
@ -5649,13 +5689,15 @@ free_lang_data_in_decl (tree decl, struct free_lang_data_d *fld)
{
DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
DECL_VISIBILITY_SPECIFIED (decl) = 0;
/* TREE_PUBLIC is used to tell if type is anonymous. */
TREE_PUBLIC (decl) = 0;
TREE_PRIVATE (decl) = 0;
DECL_ARTIFICIAL (decl) = 0;
TYPE_DECL_SUPPRESS_DEBUG (decl) = 0;
DECL_INITIAL (decl) = NULL_TREE;
DECL_ORIGINAL_TYPE (decl) = NULL_TREE;
DECL_MODE (decl) = VOIDmode;
TREE_TYPE (decl) = void_type_node;
SET_DECL_ALIGN (decl, 0);
/* TREE_TYPE is cleared at WPA time in free_odr_warning_data. */
}
else if (TREE_CODE (decl) == FIELD_DECL)
{
@ -5688,20 +5730,7 @@ free_lang_data_in_decl (tree decl, struct free_lang_data_d *fld)
if (TREE_CODE (decl) != FIELD_DECL
&& ((TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != FUNCTION_DECL)
|| !DECL_VIRTUAL_P (decl)))
{
tree ctx = DECL_CONTEXT (decl);
/* Variably modified types are needed for tree_is_indexable to decide
whether the type needs to go to local or global section.
This code is semi-broken but for now it is easiest to keep contexts
as expected. */
if (ctx && TYPE_P (ctx)
&& !variably_modified_type_p (ctx, NULL_TREE))
{
while (ctx && TYPE_P (ctx))
ctx = TYPE_CONTEXT (ctx);
DECL_CONTEXT (decl) = ctx;
}
}
DECL_CONTEXT (decl) = fld_decl_context (DECL_CONTEXT (decl));
}