middle-end/97207 - implement move assign for auto_vec<>

This implements the missing move assignment to make std::swap work
on auto_vec<>

2020-09-25  Richard Biener  <rguenther@suse.de>

	PR middle-end/97207
	* vec.h (auto_vec<T>::operator=(auto_vec<T>&&)): Implement.

1 files changed, 7 insertions, 1 deletions

diff --git a/gcc/vec.h b/gcc/vec.h
index d73d865..d8c7cda 100644
--- a/gcc/vec.h
+++ b/gcc/vec.h
@@ -1546,7 +1546,13 @@ public:
       this->m_vec = r.m_vec;
       r.m_vec = NULL;
     }
-  void operator= (auto_vec&&) = delete;
+  auto_vec& operator= (auto_vec&& r)
+    {
+      this->release ();
+      this->m_vec = r.m_vec;
+      r.m_vec = NULL;
+      return *this;
+    }
 };