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cgraph.c (cgraph_add_to_same_comdat_group): New. 

gcc/
	* cgraph.c (cgraph_add_to_same_comdat_group): New.
	* cgraph.h: Declare it.
	* ipa.c (function_and_variable_visibility): Make sure thunks
	have the right visibility.
gcc/cp/
	* method.c (use_thunk): Use cgraph_add_to_same_comdat_group.
	* optimize.c (maybe_clone_body): Likewise.
	* semantics.c (maybe_add_lambda_conv_op): Likewise.

From-SVN: r176071
This commit is contained in:
Jason Merrill 2011-07-08 23:33:44 -04:00 committed by Jason Merrill
parent e8f8774a90
commit 2fda8e144a
8 changed files with 68 additions and 62 deletions
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7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2011-07-08 Jason Merrill <jason@redhat.com>
* cgraph.c (cgraph_add_to_same_comdat_group): New.
* cgraph.h: Declare it.
* ipa.c (function_and_variable_visibility): Make sure thunks
have the right visibility.
2011-07-08 Richard Henderson <rth@redhat.com>
PR bootstrap/49680

25
gcc/cgraph.c
View File

@ -1630,6 +1630,31 @@ cgraph_remove_node (struct cgraph_node *node)
free_nodes = node;
}
/* Add NEW_ to the same comdat group that OLD is in. */
void
cgraph_add_to_same_comdat_group (struct cgraph_node *new_,
struct cgraph_node *old)
{
gcc_assert (DECL_ONE_ONLY (old->decl));
gcc_assert (!new_->same_comdat_group);
gcc_assert (new_ != old);
DECL_COMDAT_GROUP (new_->decl) = DECL_COMDAT_GROUP (old->decl);
new_->same_comdat_group = old;
if (!old->same_comdat_group)
old->same_comdat_group = new_;
else
{
struct cgraph_node *n;
for (n = old->same_comdat_group;
n->same_comdat_group != old;
n = n->same_comdat_group)
;
n->same_comdat_group = new_;
}
}
/* Remove the node from cgraph. */
void

1
gcc/cgraph.h
View File

@ -469,6 +469,7 @@ void debug_cgraph_node (struct cgraph_node *);
void cgraph_insert_node_to_hashtable (struct cgraph_node *node);
void cgraph_remove_edge (struct cgraph_edge *);
void cgraph_remove_node (struct cgraph_node *);
void cgraph_add_to_same_comdat_group (struct cgraph_node *, struct cgraph_node *);
void cgraph_remove_node_and_inline_clones (struct cgraph_node *);
void cgraph_release_function_body (struct cgraph_node *);
void cgraph_node_remove_callees (struct cgraph_node *node);

4
gcc/cp/ChangeLog
View File

@ -1,5 +1,9 @@
2011-07-08 Jason Merrill <jason@redhat.com>
* method.c (use_thunk): Use cgraph_add_to_same_comdat_group.
* optimize.c (maybe_clone_body): Likewise.
* semantics.c (maybe_add_lambda_conv_op): Likewise.
PR c++/45603
* decl.c (expand_static_init): Don't get confused by user
declaration of __cxa_guard_acquire.

13
gcc/cp/method.c
View File

@ -283,7 +283,7 @@ use_thunk (tree thunk_fndecl, bool emit_p)
tree virtual_offset;
HOST_WIDE_INT fixed_offset, virtual_value;
bool this_adjusting = DECL_THIS_THUNK_P (thunk_fndecl);
struct cgraph_node *funcn;
struct cgraph_node *funcn, *thunk_node;
/* We should have called finish_thunk to give it a name. */
gcc_assert (DECL_NAME (thunk_fndecl));
@ -344,8 +344,7 @@ use_thunk (tree thunk_fndecl, bool emit_p)
DECL_VISIBILITY_SPECIFIED (thunk_fndecl)
= DECL_VISIBILITY_SPECIFIED (function);
DECL_COMDAT (thunk_fndecl) = DECL_COMDAT (function);
if (DECL_ONE_ONLY (function) || DECL_WEAK (function))
make_decl_one_only (thunk_fndecl, cxx_comdat_group (thunk_fndecl));
DECL_WEAK (thunk_fndecl) = DECL_WEAK (function);
if (flag_syntax_only)
{
@ -386,9 +385,11 @@ use_thunk (tree thunk_fndecl, bool emit_p)
TREE_ASM_WRITTEN (thunk_fndecl) = 1;
funcn = cgraph_get_node (function);
gcc_checking_assert (funcn);
cgraph_add_thunk (funcn, thunk_fndecl, function,
this_adjusting, fixed_offset, virtual_value,
virtual_offset, alias);
thunk_node = cgraph_add_thunk (funcn, thunk_fndecl, function,
this_adjusting, fixed_offset, virtual_value,
virtual_offset, alias);
if (DECL_ONE_ONLY (function))
cgraph_add_to_same_comdat_group (thunk_node, funcn);
if (!this_adjusting
|| !targetm.asm_out.can_output_mi_thunk (thunk_fndecl, fixed_offset,

41
gcc/cp/optimize.c
View File

@ -309,12 +309,12 @@ maybe_clone_body (tree fn)
&& (!DECL_ONE_ONLY (fns[0])
|| (HAVE_COMDAT_GROUP
&& DECL_WEAK (fns[0])))
&& (flag_syntax_only
/* Set linkage flags appropriately before
cgraph_create_function_alias looks at them. */
|| (expand_or_defer_fn_1 (clone)
&& cgraph_same_body_alias (cgraph_get_node (fns[0]),
clone, fns[0]))))
&& !flag_syntax_only
/* Set linkage flags appropriately before
cgraph_create_function_alias looks at them. */
&& expand_or_defer_fn_1 (clone)
&& cgraph_same_body_alias (cgraph_get_node (fns[0]),
clone, fns[0]))
{
alias = true;
if (DECL_ONE_ONLY (fns[0]))
@ -324,13 +324,22 @@ maybe_clone_body (tree fn)
*[CD][12]*. */
comdat_group = cdtor_comdat_group (fns[1], fns[0]);
DECL_COMDAT_GROUP (fns[0]) = comdat_group;
cgraph_add_to_same_comdat_group (cgraph_get_node (clone),
cgraph_get_node (fns[0]));
}
}
/* Build the delete destructor by calling complete destructor
and delete function. */
if (idx == 2)
build_delete_destructor_body (clone, fns[1]);
{
build_delete_destructor_body (clone, fns[1]);
/* If *[CD][12]* dtors go into the *[CD]5* comdat group and dtor is
virtual, it goes into the same comdat group as well. */
if (comdat_group)
cgraph_add_to_same_comdat_group (cgraph_get_create_node (clone),
cgraph_get_node (fns[0]));
}
else if (alias)
/* No need to populate body. */ ;
else
@ -419,24 +428,6 @@ maybe_clone_body (tree fn)
}
pop_from_top_level ();
if (comdat_group)
{
DECL_COMDAT_GROUP (fns[1]) = comdat_group;
if (fns[2])
{
struct cgraph_node *base_dtor_node, *deleting_dtor_node;
/* If *[CD][12]* dtors go into the *[CD]5* comdat group and dtor is
virtual, it goes into the same comdat group as well. */
DECL_COMDAT_GROUP (fns[2]) = comdat_group;
base_dtor_node = cgraph_get_node (fns[0]);
deleting_dtor_node = cgraph_get_node (fns[2]);
gcc_assert (base_dtor_node->same_comdat_group == NULL);
gcc_assert (deleting_dtor_node->same_comdat_group == NULL);
base_dtor_node->same_comdat_group = deleting_dtor_node;
deleting_dtor_node->same_comdat_group = base_dtor_node;
}
}
/* We don't need to process the original function any further. */
return 1;
}

10
gcc/cp/semantics.c
View File

@ -8880,14 +8880,8 @@ maybe_add_lambda_conv_op (tree type)
if (DECL_ONE_ONLY (statfn))
{
/* Put the thunk in the same comdat group as the call op. */
struct cgraph_node *callop_node, *thunk_node;
DECL_COMDAT_GROUP (statfn) = cxx_comdat_group (callop);
callop_node = cgraph_get_create_node (callop);
thunk_node = cgraph_get_create_node (statfn);
gcc_assert (callop_node->same_comdat_group == NULL);
gcc_assert (thunk_node->same_comdat_group == NULL);
callop_node->same_comdat_group = thunk_node;
thunk_node->same_comdat_group = callop_node;
cgraph_add_to_same_comdat_group (cgraph_get_create_node (statfn),
cgraph_get_create_node (callop));
}
body = begin_function_body ();
compound_stmt = begin_compound_stmt (0);

29
gcc/ipa.c
View File

@ -865,31 +865,14 @@ function_and_variable_visibility (bool whole_program)
decl_node = cgraph_function_node (decl_node->callees->callee, NULL);
/* Thunks have the same visibility as function they are attached to.
For some reason C++ frontend don't seem to care. I.e. in
g++.dg/torture/pr41257-2.C the thunk is not comdat while function
it is attached to is.
We also need to arrange the thunk into the same comdat group as
the function it reffers to. */
Make sure the C++ front end set this up properly. */
if (DECL_ONE_ONLY (decl_node->decl))
{
DECL_COMDAT (node->decl) = DECL_COMDAT (decl_node->decl);
DECL_COMDAT_GROUP (node->decl) = DECL_COMDAT_GROUP (decl_node->decl);
if (DECL_ONE_ONLY (decl_node->decl) && !node->same_comdat_group)
{
node->same_comdat_group = decl_node;
if (!decl_node->same_comdat_group)
decl_node->same_comdat_group = node;
else
{
struct cgraph_node *n;
for (n = decl_node->same_comdat_group;
n->same_comdat_group != decl_node;
n = n->same_comdat_group)
;
n->same_comdat_group = node;
}
}
gcc_checking_assert (DECL_COMDAT (node->decl)
== DECL_COMDAT (decl_node->decl));
gcc_checking_assert (DECL_COMDAT_GROUP (node->decl)
== DECL_COMDAT_GROUP (decl_node->decl));
gcc_checking_assert (node->same_comdat_group);
}
if (DECL_EXTERNAL (decl_node->decl))
DECL_EXTERNAL (node->decl) = 1;