From 27ee75dbe81bb781214c66a9e6a759c08b7deb60 Mon Sep 17 00:00:00 2001
From: Martin Jambor <mjambor@suse.cz>
Date: Fri, 29 Apr 2022 17:38:15 +0200
Subject: [PATCH] ipa: Release body of clone_of when removing its last clone
(PR 100413)
In the PR, the verifier complains that we did not manage to remove the
body of a node and it is right. The node is kept for materialization
of two clones but after one is materialized, the other one is removed
as unneeded (as a part of delete_unreachable_blocks_update_callgraph).
The problem is that the node removal does not check for this situation
and can leave the clone_of node there with a body attached to it even
though there is no use for it any more. This patch does checks for it
and handles the situation in a simlar way that
cgraph_node::materialize_clone does it, except that it also has to be
careful that the removed node itself does not have any clones, which
would still need the clone_of's body. Failing to do that results in a
bootstrap failure.
gcc/ChangeLog:
2022-04-27 Martin Jambor <mjambor@suse.cz>
PR ipa/100413
* cgraph.cc (cgraph_node::remove): Release body of the node this
is clone_of if appropriate.
gcc/testsuite/ChangeLog:
2022-04-27 Martin Jambor <mjambor@suse.cz>
PR ipa/100413
* g++.dg/ipa/pr100413.C: New test.
---
gcc/cgraph.cc | 6 ++-
gcc/testsuite/g++.dg/ipa/pr100413.C | 64 +++++++++++++++++++++++++++++
2 files changed, 69 insertions(+), 1 deletion(-)
create mode 100644 gcc/testsuite/g++.dg/ipa/pr100413.C
diff --git a/gcc/cgraph.cc b/gcc/cgraph.cc
index 0159eaa768b5..4bb9e7ba6af9 100644
--- a/gcc/cgraph.cc
+++ b/gcc/cgraph.cc
@@ -1893,7 +1893,11 @@ cgraph_node::remove (void)
if (prev_sibling_clone)
prev_sibling_clone->next_sibling_clone = next_sibling_clone;
else if (clone_of)
- clone_of->clones = next_sibling_clone;
+ {
+ clone_of->clones = next_sibling_clone;
+ if (!clone_of->analyzed && !clone_of->clones && !clones)
+ clone_of->release_body ();
+ }
if (next_sibling_clone)
next_sibling_clone->prev_sibling_clone = prev_sibling_clone;
if (clones)
diff --git a/gcc/testsuite/g++.dg/ipa/pr100413.C b/gcc/testsuite/g++.dg/ipa/pr100413.C
new file mode 100644
index 000000000000..96d71e7cf353
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ipa/pr100413.C
@@ -0,0 +1,64 @@
+/* { dg-do compile } */
+/* { dg-options "-std=c++11 -O2 -fno-guess-branch-probability -fno-inline-functions-called-once -fipa-cp-clone -fipa-pta -fnon-call-exceptions --param=ipa-cp-eval-threshold=0" } */
+
+
+template <typename> class allocator {
+public:
+ ~allocator();
+};
+template <typename> struct allocator_traits;
+template <typename _Tp> struct allocator_traits<allocator<_Tp>> {
+ using allocator_type = allocator<_Tp>;
+ template <typename _Up> using rebind_alloc = allocator<_Up>;
+ static void deallocate(allocator_type);
+};
+template <typename _ForwardIterator, typename _Tp>
+void _Destroy(_ForwardIterator, _ForwardIterator, _Tp);
+struct __alloc_traits : allocator_traits<allocator<int>> {
+ struct rebind {
+ typedef rebind_alloc<int> other;
+ };
+};
+struct _Vector_base {
+ struct _Vector_impl_data {
+ int _M_start;
+ int _M_finish;
+ };
+ struct _Vector_impl : __alloc_traits::rebind::other, _Vector_impl_data {};
+ __alloc_traits::rebind::other _M_get_Tp_allocator();
+ ~_Vector_base() { _M_deallocate(); }
+ _Vector_impl _M_impl;
+ void _M_deallocate() { __alloc_traits::deallocate(_M_impl); }
+};
+class vector : _Vector_base {
+public:
+ vector() noexcept {
+ allocator<int> __trans_tmp_1 = _M_get_Tp_allocator();
+ _Destroy(_M_impl._M_start, _M_impl._M_finish, __trans_tmp_1);
+ }
+ void size();
+};
+struct HTTPCallback {
+ virtual void OnFailure();
+};
+struct ContentCallback {
+ virtual void OnDownloadProgress();
+};
+class ClientNetworkContentSocketHandler : ContentCallback, HTTPCallback {
+ vector requested;
+ vector infos;
+ vector lastActivity;
+ void OnFailure();
+public:
+ int IDLE_TIMEOUT = 0;
+ ClientNetworkContentSocketHandler();
+ void DownloadSelectedContent();
+} _network_content_client;
+void ClientNetworkContentSocketHandler::DownloadSelectedContent() {
+ vector content;
+ content.size();
+}
+void ClientNetworkContentSocketHandler::OnFailure() {
+ DownloadSelectedContent();
+}
+ClientNetworkContentSocketHandler::ClientNetworkContentSocketHandler() {}
--
GitLab