testsuite: Add another range for coroutines testcase [PR118574]

This patch adds another range for coroutine testcase, which doesn't
extend (across co_await) just the __for_range var and what it binds
to (so passes even without -frange-for-ext-temps), but also some other
temporaries and verifies they are destructed in the right order.

2025-02-13  Jakub Jelinek  <jakub@redhat.com>

	PR c++/118574
	* g++.dg/coroutines/range-for2.C: New test.

diff --git a/gcc/testsuite/g++.dg/coroutines/range-for2.C b/gcc/testsuite/g++.dg/coroutines/range-for2.C
new file mode 100644 (file)
index 0000000..14372f3
--- /dev/null
+++ b/gcc/testsuite/g++.dg/coroutines/range-for2.C
@@ -0,0 +1,92 @@
+// PR c++/118574
+// { dg-do run }
+// { dg-additional-options "-std=c++23 -O2" }
+
+#include <coroutine>
+
+[[gnu::noipa]] void
+baz (int *)
+{
+}
+
+struct D {
+  D () : d (new int (42)) {}
+  ~D () { if (*d != 42) __builtin_abort (); *d = 0; baz (d); delete d; }
+  int *d;
+};
+
+struct E {
+  E (const D &x) : e (x) {}
+  void test () const { if (*e.d != 42) __builtin_abort (); }
+  ~E () { test (); }
+  const D &e;
+};
+
+struct A {
+  const char **a = nullptr;
+  int n = 0;
+  const E *e1 = nullptr;
+  const E *e2 = nullptr;
+  void test () const { if (e1) e1->test (); if (e2) e2->test (); }
+  void push_back (const char *x) { test (); if (!a) a = new const char *[2]; a[n++] = x; }
+  const char **begin () const { test (); return a; }
+  const char **end () const { test (); return a + n; }
+  ~A () { test (); delete[] a; }
+};
+
+struct B {
+  long ns;
+  bool await_ready () const noexcept { return false; }
+  void await_suspend (std::coroutine_handle<> h) const noexcept {
+    volatile int v = 0;
+    while (v < ns)
+      v = v + 1;
+    h.resume ();
+  }
+  void await_resume () const noexcept {}
+};
+
+struct C {
+  struct promise_type {
+    const char *value;
+    std::suspend_never initial_suspend () { return {}; }
+    std::suspend_always final_suspend () noexcept { return {}; }
+    void return_value (const char *v) { value = v; }
+    void unhandled_exception () { __builtin_abort (); }
+    C get_return_object () { return C{this}; }
+  };
+  promise_type *p;
+  explicit C (promise_type *p) : p(p) {}
+  const char *get () { return p->value; }
+};
+
+A
+foo (const E &e1, const E &e2)
+{
+  A a;
+  a.e1 = &e1;
+  a.e2 = &e2;
+  a.push_back ("foo");
+  a.push_back ("bar");
+  return a;
+}
+
+C
+bar ()
+{
+  A ret;
+  for (const auto &item : foo (E{D {}}, E{D {}}))
+    {
+      co_await B{200000};
+      ret.push_back (item);
+    }
+  co_return "foobar";
+}
+
+int
+main ()
+{
+  auto task = bar ();
+  if (__builtin_strcmp (task.get (), "foobar"))
+    __builtin_abort ();
+}