https://gcc.gnu.org/g:f057e958732cd2627b6db127fa6d4d882b61dd5f
commit r14-10803-gf057e958732cd2627b6db127fa6d4d882b61dd5f
Author: Martin Jambor <mjam...@suse.cz>
Date: Fri Oct 18 21:32:16 2024 +0200
ipa: Treat static constructors and destructors as non-local (PR 115815)
In PR 115815, IPA-SRA thought it had control over all invocations of a
(recursive) static destructor but it did not see the implied
invocation which led to the original being left behind and the
clean-up code encountering uses of SSAs that definitely should have
been dead.
Fixed by teaching cgraph_node::can_be_local_p about static
constructors and destructors. Similar test is missing in
cgraph_node::local_p so I added the check there as well.
In addition to the commit with the fix, this backport also contains
squashed commit 1a458bdeb223ffa501bac8e76182115681967094 which fixes
dejagnu directives in the testcase.
gcc/ChangeLog:
2024-07-25 Martin Jambor <mjam...@suse.cz>
PR ipa/115815
* cgraph.cc (cgraph_node_cannot_be_local_p_1): Also check
DECL_STATIC_CONSTRUCTOR and DECL_STATIC_DESTRUCTOR.
* ipa-visibility.cc (non_local_p): Likewise.
(cgraph_node::local_p): Delete extraneous line of tabs.
gcc/testsuite/ChangeLog:
2024-07-25 Martin Jambor <mjam...@suse.cz>
PR ipa/115815
* gcc.dg/lto/pr115815_0.c: New test.
(cherry picked from commit e98ad6a049c96c21cf641954584c2f5b7df0ce93)
Diff:
---
gcc/cgraph.cc | 4 +++-
gcc/ipa-visibility.cc | 5 +++--
gcc/testsuite/gcc.dg/lto/pr115815_0.c | 22 ++++++++++++++++++++++
3 files changed, 28 insertions(+), 3 deletions(-)
diff --git a/gcc/cgraph.cc b/gcc/cgraph.cc
index 473d8410bc97..39a3adbc7c35 100644
--- a/gcc/cgraph.cc
+++ b/gcc/cgraph.cc
@@ -2434,7 +2434,9 @@ cgraph_node_cannot_be_local_p_1 (cgraph_node *node, void
*)
&& !node->forced_by_abi
&& !node->used_from_object_file_p ()
&& !node->same_comdat_group)
- || !node->externally_visible));
+ || !node->externally_visible)
+ && !DECL_STATIC_CONSTRUCTOR (node->decl)
+ && !DECL_STATIC_DESTRUCTOR (node->decl));
}
/* Return true if cgraph_node can be made local for API change.
diff --git a/gcc/ipa-visibility.cc b/gcc/ipa-visibility.cc
index 501d3c304aa3..21f0c47f388e 100644
--- a/gcc/ipa-visibility.cc
+++ b/gcc/ipa-visibility.cc
@@ -102,7 +102,9 @@ non_local_p (struct cgraph_node *node, void *data
ATTRIBUTE_UNUSED)
&& !node->externally_visible
&& !node->used_from_other_partition
&& !node->in_other_partition
- && node->get_availability () >= AVAIL_AVAILABLE);
+ && node->get_availability () >= AVAIL_AVAILABLE
+ && !DECL_STATIC_CONSTRUCTOR (node->decl)
+ && !DECL_STATIC_DESTRUCTOR (node->decl));
}
/* Return true when function can be marked local. */
@@ -116,7 +118,6 @@ cgraph_node::local_p (void)
return n->callees->callee->local_p ();
return !n->call_for_symbol_thunks_and_aliases (non_local_p,
NULL, true);
-
}
/* A helper for comdat_can_be_unshared_p. */
diff --git a/gcc/testsuite/gcc.dg/lto/pr115815_0.c
b/gcc/testsuite/gcc.dg/lto/pr115815_0.c
new file mode 100644
index 000000000000..ade91def55b0
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/lto/pr115815_0.c
@@ -0,0 +1,22 @@
+/* { dg-lto-options {{-O2 -flto}} } */
+/* { dg-lto-do link } */
+/* { dg-require-effective-target global_constructor } */
+
+int a;
+volatile int v;
+volatile int w;
+
+int __attribute__((destructor))
+b() {
+ if (v)
+ return a + b();
+ v = 5;
+ return 0;
+}
+
+int
+main (int argc, char **argv)
+{
+ w = 1;
+ return 0;
+}
