* [committed] c++: Fix ICE with weird copy assignment operator [PR114572]
@ 2024-04-05 7:35 Jakub Jelinek
2024-04-08 21:30 ` Jason Merrill
0 siblings, 1 reply; 2+ messages in thread
From: Jakub Jelinek @ 2024-04-05 7:35 UTC (permalink / raw)
To: gcc-patches; +Cc: Tobias Burnus
Hi!
While ctors/dtors don't return anything (undeclared void or this pointer
on arm) and copy assignment operators normally return a reference to *this,
it isn't invalid to return uselessly some class object which might need
destructing, but the OpenMP clause handling code wasn't expecting that.
The following patch fixes that.
Bootstrapped/regtested on x86_64-linux and i686-linux, committed to trunk so
far.
2024-04-05 Jakub Jelinek <jakub@redhat.com>
PR c++/114572
* cp-gimplify.cc (cxx_omp_clause_apply_fn): Call build_cplus_new
on build_call_a result if it has class type.
* testsuite/libgomp.c++/pr114572.C: New test.
--- gcc/cp/cp-gimplify.cc.jj 2024-04-02 13:07:58.540385210 +0200
+++ gcc/cp/cp-gimplify.cc 2024-04-04 16:41:50.781008370 +0200
@@ -2480,6 +2480,8 @@ cxx_omp_clause_apply_fn (tree fn, tree a
TREE_PURPOSE (parm), fn,
i - is_method, tf_warning_or_error);
t = build_call_a (fn, i, argarray);
+ if (MAYBE_CLASS_TYPE_P (TREE_TYPE (t)))
+ t = build_cplus_new (TREE_TYPE (t), t, tf_warning_or_error);
t = fold_convert (void_type_node, t);
t = fold_build_cleanup_point_expr (TREE_TYPE (t), t);
append_to_statement_list (t, &ret);
@@ -2513,6 +2515,8 @@ cxx_omp_clause_apply_fn (tree fn, tree a
TREE_PURPOSE (parm), fn,
i - is_method, tf_warning_or_error);
t = build_call_a (fn, i, argarray);
+ if (MAYBE_CLASS_TYPE_P (TREE_TYPE (t)))
+ t = build_cplus_new (TREE_TYPE (t), t, tf_warning_or_error);
t = fold_convert (void_type_node, t);
return fold_build_cleanup_point_expr (TREE_TYPE (t), t);
}
--- libgomp/testsuite/libgomp.c++/pr114572.C.jj 2024-04-04 16:45:27.070034421 +0200
+++ libgomp/testsuite/libgomp.c++/pr114572.C 2024-04-04 16:45:03.529358222 +0200
@@ -0,0 +1,24 @@
+// PR c++/114572
+// { dg-do run }
+// { dg-options "-fopenmp -O0" }
+
+#include <stdlib.h>
+
+struct S
+{
+ S () : s (0) {}
+ ~S () {}
+ S operator= (const S &x) { s = x.s; return *this; }
+ int s;
+};
+
+int
+main ()
+{
+ S s;
+ #pragma omp parallel for lastprivate(s)
+ for (int i = 0; i < 10; ++i)
+ s.s = i;
+ if (s.s != 9)
+ abort ();
+}
Jakub
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [committed] c++: Fix ICE with weird copy assignment operator [PR114572]
2024-04-05 7:35 [committed] c++: Fix ICE with weird copy assignment operator [PR114572] Jakub Jelinek
@ 2024-04-08 21:30 ` Jason Merrill
0 siblings, 0 replies; 2+ messages in thread
From: Jason Merrill @ 2024-04-08 21:30 UTC (permalink / raw)
To: Jakub Jelinek, gcc-patches; +Cc: Tobias Burnus
On 4/5/24 03:35, Jakub Jelinek wrote:
> Hi!
>
> While ctors/dtors don't return anything (undeclared void or this pointer
> on arm) and copy assignment operators normally return a reference to *this,
> it isn't invalid to return uselessly some class object which might need
> destructing, but the OpenMP clause handling code wasn't expecting that.
>
> The following patch fixes that.
>
> Bootstrapped/regtested on x86_64-linux and i686-linux, committed to trunk so
> far.
>
> 2024-04-05 Jakub Jelinek <jakub@redhat.com>
>
> PR c++/114572
> * cp-gimplify.cc (cxx_omp_clause_apply_fn): Call build_cplus_new
> on build_call_a result if it has class type.
>
> * testsuite/libgomp.c++/pr114572.C: New test.
>
> --- gcc/cp/cp-gimplify.cc.jj 2024-04-02 13:07:58.540385210 +0200
> +++ gcc/cp/cp-gimplify.cc 2024-04-04 16:41:50.781008370 +0200
> @@ -2480,6 +2480,8 @@ cxx_omp_clause_apply_fn (tree fn, tree a
> TREE_PURPOSE (parm), fn,
> i - is_method, tf_warning_or_error);
> t = build_call_a (fn, i, argarray);
> + if (MAYBE_CLASS_TYPE_P (TREE_TYPE (t)))
> + t = build_cplus_new (TREE_TYPE (t), t, tf_warning_or_error);
Maybe use build_cxx_call instead of build_call_a?
Jason
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2024-04-08 21:30 ` Jason Merrill
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