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re PR lto/53808 (Undefined symbol when building a library with lto)

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PR lto/53808
	* class.c (clone_function_decl): Call note_vague_linkage_fn for
	defaulted virtual dtor.

From-SVN: r208153
This commit is contained in:
Jason Merrill 2014-02-25 13:54:48 -05:00 committed by Jason Merrill
parent d808e92ea9
commit 6e6eaecc6a
3 changed files with 24 additions and 0 deletions
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4
gcc/cp/ChangeLog
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@ -1,5 +1,9 @@
2014-02-25 Jason Merrill <jason@redhat.com>
PR lto/53808
* class.c (clone_function_decl): Call note_vague_linkage_fn for
defaulted virtual dtor.
DR 1286
PR c++/60328
* pt.c (get_underlying_template): Fix equivalence calculation.

4
gcc/cp/class.c
View File

@ -4582,6 +4582,10 @@ clone_function_decl (tree fn, int update_method_vec_p)
destructor. */
if (DECL_VIRTUAL_P (fn))
{
if (DECL_DEFAULTED_FN (fn) && flag_devirtualize)
/* Make sure the destructor gets synthesized so that it can be
inlined after devirtualization. */
note_vague_linkage_fn (fn);
clone = build_clone (fn, deleting_dtor_identifier);
if (update_method_vec_p)
add_method (DECL_CONTEXT (clone), clone, NULL_TREE);

16
gcc/testsuite/g++.dg/opt/devirt4.C Normal file
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@ -0,0 +1,16 @@
// PR lto/53808
// Devirtualization + inlining should produce a non-virtual
// call to ~foo.
// { dg-options "-O -fdevirtualize" }
// { dg-final { scan-assembler "_ZN3fooD2Ev" } }
struct foo {
virtual ~foo();
};
struct bar : public foo {
virtual void zed();
};
void f() {
foo *x(new bar);
delete x;
}