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* [gcc/devel/omp/gcc-12] openmp: Don't try to destruct DECL_OMP_PRIVATIZED_MEMBER vars [PR108180]
@ 2022-12-21 18:21 Tobias Burnus
0 siblings, 0 replies; only message in thread
From: Tobias Burnus @ 2022-12-21 18:21 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:656960afd2ce23a9cf4e089c7f4ae0b1e5cd3267
commit 656960afd2ce23a9cf4e089c7f4ae0b1e5cd3267
Author: Jakub Jelinek <jakub@redhat.com>
Date: Wed Dec 21 18:49:17 2022 +0100
openmp: Don't try to destruct DECL_OMP_PRIVATIZED_MEMBER vars [PR108180]
DECL_OMP_PRIVATIZED_MEMBER vars are artificial vars with DECL_VALUE_EXPR
of this->field used just during gimplification and omp lowering/expansion
to privatize individual fields in methods when needed.
As the following testcase shows, when not in templates, they were handled
right, but in templates we actually called cp_finish_decl on them and
that can result in their destruction, which is obviously undesirable,
we should only destruct the privatized copies of them created in omp
lowering.
Fixed thusly.
2022-12-21 Jakub Jelinek <jakub@redhat.com>
PR c++/108180
* pt.cc (tsubst_expr): Don't call cp_finish_decl on
DECL_OMP_PRIVATIZED_MEMBER vars.
* testsuite/libgomp.c++/pr108180.C: New test.
(cherry picked from commit 1119902b6c7c1c50123ed85ec1def8be4772d68c)
Diff:
---
gcc/cp/ChangeLog.omp | 9 ++++++
gcc/cp/pt.cc | 5 +++
gcc/testsuite/ChangeLog.omp | 8 +++++
libgomp/testsuite/libgomp.c++/pr108180.C | 55 ++++++++++++++++++++++++++++++++
4 files changed, 77 insertions(+)
diff --git a/gcc/cp/ChangeLog.omp b/gcc/cp/ChangeLog.omp
index 1899bde8c88..2652871ea21 100644
--- a/gcc/cp/ChangeLog.omp
+++ b/gcc/cp/ChangeLog.omp
@@ -1,3 +1,12 @@
+2022-12-21 Tobias Burnus <tobias@codesourcery.com>
+
+ Backport from mainline:
+ 2022-12-21 Jakub Jelinek <jakub@redhat.com>
+
+ PR c++/108180
+ * pt.cc (tsubst_expr): Don't call cp_finish_decl on
+ DECL_OMP_PRIVATIZED_MEMBER vars.
+
2022-10-28 Tobias Burnus <tobias@codesourcery.com>
Backport from mainline:
diff --git a/gcc/cp/pt.cc b/gcc/cp/pt.cc
index 36713ca5420..a7ff31d8679 100644
--- a/gcc/cp/pt.cc
+++ b/gcc/cp/pt.cc
@@ -18719,6 +18719,11 @@ tsubst_expr (tree t, tree args, tsubst_flags_t complain, tree in_decl,
tree asmspec_tree = NULL_TREE;
maybe_push_decl (decl);
+ if (VAR_P (decl)
+ && DECL_LANG_SPECIFIC (decl)
+ && DECL_OMP_PRIVATIZED_MEMBER (decl))
+ break;
+
if (VAR_P (decl)
&& DECL_DECOMPOSITION_P (decl)
&& TREE_TYPE (pattern_decl) != error_mark_node)
diff --git a/gcc/testsuite/ChangeLog.omp b/gcc/testsuite/ChangeLog.omp
index 1c53c2fc908..7475f6d597f 100644
--- a/gcc/testsuite/ChangeLog.omp
+++ b/gcc/testsuite/ChangeLog.omp
@@ -1,3 +1,11 @@
+2022-12-21 Tobias Burnus <tobias@codesourcery.com>
+
+ Backport from mainline:
+ 2022-12-21 Jakub Jelinek <jakub@redhat.com>
+
+ PR c++/108180
+ * testsuite/libgomp.c++/pr108180.C: New test.
+
2022-12-21 Tobias Burnus <tobias@codesourcery.com>
Backported from master:
diff --git a/libgomp/testsuite/libgomp.c++/pr108180.C b/libgomp/testsuite/libgomp.c++/pr108180.C
new file mode 100644
index 00000000000..452910cebeb
--- /dev/null
+++ b/libgomp/testsuite/libgomp.c++/pr108180.C
@@ -0,0 +1,55 @@
+// PR c++/108180
+// { dg-do run }
+
+struct A {
+ A () { ++a; }
+ A (A &&) = delete;
+ A (const A &) { ++a; }
+ A &operator= (const A &) = delete;
+ A &operator= (A &&) = delete;
+ ~A () { --a; }
+ static int a;
+};
+int A::a = 0;
+
+struct B {
+ A a;
+ template <int N>
+ int
+ foo ()
+ {
+ int res = 0;
+ #pragma omp parallel for if(false) firstprivate(a)
+ for (int i = 0; i < 64; ++i)
+ res += i;
+ return res;
+ }
+ int
+ bar ()
+ {
+ int res = 0;
+ #pragma omp parallel for if(false) firstprivate(a)
+ for (int i = 0; i < 64; ++i)
+ res += i;
+ return res;
+ }
+};
+
+int
+main ()
+{
+ {
+ B b;
+ if (b.foo<0> () != 2016)
+ __builtin_abort ();
+ }
+ if (A::a != 0)
+ __builtin_abort ();
+ {
+ B b;
+ if (b.bar () != 2016)
+ __builtin_abort ();
+ }
+ if (A::a != 0)
+ __builtin_abort ();
+}
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