diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index b047dbff0f2..720c3ee0e73 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,9 @@
+2019-12-23  Richard Sandiford  <richard.sandiford@arm.com>
+
+	* cvt.c (ocp_convert): Apply rvalue to the source of vector
+	conversions.
+	* typeck.c (build_reinterpret_cast_1): Likewise.
+
 2019-12-19  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/92745 - bogus error when initializing array of vectors.
diff --git a/gcc/cp/cvt.c b/gcc/cp/cvt.c
index e922e4d9b89..9e29225cfbb 100644
--- a/gcc/cp/cvt.c
+++ b/gcc/cp/cvt.c
@@ -744,7 +744,7 @@ ocp_convert (tree type, tree expr, int convtype, int flags,
       else if (TREE_CODE (type) == COMPLEX_TYPE)
 	return convert_to_complex_maybe_fold (type, e, dofold);
       else if (VECTOR_TYPE_P (type))
-	return convert_to_vector (type, e);
+	return convert_to_vector (type, rvalue (e));
       else if (TREE_CODE (e) == TARGET_EXPR)
 	{
 	  /* Don't build a NOP_EXPR of class type.  Instead, change the
@@ -881,7 +881,7 @@ ocp_convert (tree type, tree expr, int convtype, int flags,
 		      in_vtype, type);
 	  return error_mark_node;
 	}
-      return convert_to_vector (type, e);
+      return convert_to_vector (type, rvalue (e));
     }
   if (code == REAL_TYPE || code == COMPLEX_TYPE)
     {
diff --git a/gcc/cp/typeck.c b/gcc/cp/typeck.c
index 41ef8966f49..d2f4a001e50 100644
--- a/gcc/cp/typeck.c
+++ b/gcc/cp/typeck.c
@@ -7858,7 +7858,7 @@ build_reinterpret_cast_1 (location_t loc, tree type, tree expr,
       return build_nop_reinterpret (type, expr);
     }
   else if (gnu_vector_type_p (type))
-    return convert_to_vector (type, expr);
+    return convert_to_vector (type, rvalue (expr));
   else if (gnu_vector_type_p (intype)
 	   && INTEGRAL_OR_ENUMERATION_TYPE_P (type))
     return convert_to_integer_nofold (type, expr);
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index e7cdf80e546..321d54b47fc 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2019-12-23  Richard Sandiford  <richard.sandiford@arm.com>
+
+	* g++.dg/ext/vector39.C: New test.
+
 2019-12-21  Andrew Pinski  <apinski@marvell.com>
 
 	PR testsuite/92998
diff --git a/gcc/testsuite/g++.dg/ext/vector39.C b/gcc/testsuite/g++.dg/ext/vector39.C
new file mode 100644
index 00000000000..140784dfa52
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/vector39.C
@@ -0,0 +1,96 @@
+// { dg-options "-flax-vector-conversions" }
+
+typedef unsigned char v16qi __attribute__((vector_size(16)));
+typedef unsigned int v4si __attribute__((vector_size(16)));
+
+extern v4si normal_v4si;
+extern const v4si const_v4si;
+extern v4si *normal_v4si_ptr;
+extern const v4si *const_v4si_ptr;
+extern v4si &normal_v4si_ref;
+extern const v4si &const_v4si_ref;
+
+extern v16qi normal_v16qi;
+extern const v16qi const_v16qi;
+extern v16qi *normal_v16qi_ptr;
+extern const v16qi *const_v16qi_ptr;
+extern v16qi &normal_v16qi_ref;
+extern const v16qi &const_v16qi_ref;
+
+namespace nonconst_refs {
+  v16qi &ref_normal_v4si = normal_v4si; // { dg-error {cannot bind non-const lvalue} }
+  v16qi &ref_const_v4si = const_v4si; // { dg-error {cannot bind non-const lvalue} }
+  v16qi &ref_normal_v4si_ptr = *normal_v4si_ptr; // { dg-error {cannot bind non-const lvalue} }
+  v16qi &ref_const_v4si_ptr = *const_v4si_ptr; // { dg-error {cannot bind non-const lvalue} }
+  v16qi &ref_normal_v4si_ref = normal_v4si_ref; // { dg-error {cannot bind non-const lvalue} }
+  v16qi &ref_const_v4si_ref = const_v4si_ref; // { dg-error {cannot bind non-const lvalue} }
+
+  v16qi &ref_normal_v16qi = normal_v16qi;
+  v16qi &ref_const_v16qi = const_v16qi; // { dg-error {discards qualifiers} }
+  v16qi &ref_normal_v16qi_ptr = *normal_v16qi_ptr;
+  v16qi &ref_const_v16qi_ptr = *const_v16qi_ptr; // { dg-error {discards qualifiers} }
+  v16qi &ref_normal_v16qi_ref = normal_v16qi_ref;
+  v16qi &ref_const_v16qi_ref = const_v16qi_ref; // { dg-error {discards qualifiers} }
+}
+
+#if __cplusplus >= 201103L
+namespace nonconst_rvalue_refs {
+  v16qi &&ref_normal_v4si = normal_v4si;
+  v16qi &&ref_const_v4si = const_v4si;
+  v16qi &&ref_normal_v4si_ptr = *normal_v4si_ptr;
+  v16qi &&ref_const_v4si_ptr = *const_v4si_ptr;
+  v16qi &&ref_normal_v4si_ref = normal_v4si_ref;
+  v16qi &&ref_const_v4si_ref = const_v4si_ref;
+
+  v16qi &&ref_normal_v16qi = normal_v16qi; // { dg-error {cannot bind rvalue reference} "" { target c++11 } }
+  v16qi &&ref_const_v16qi = const_v16qi; // { dg-error {cannot bind rvalue reference} "" { target c++11 } }
+  v16qi &&ref_normal_v16qi_ptr = *normal_v16qi_ptr; // { dg-error {cannot bind rvalue reference} "" { target c++11 } }
+  v16qi &&ref_const_v16qi_ptr = *const_v16qi_ptr; // { dg-error {cannot bind rvalue reference} "" { target c++11 } }
+  v16qi &&ref_normal_v16qi_ref = normal_v16qi_ref; // { dg-error {cannot bind rvalue reference} "" { target c++11 } }
+  v16qi &&ref_const_v16qi_ref = const_v16qi_ref; // { dg-error {cannot bind rvalue reference} "" { target c++11 } }
+}
+#endif
+
+namespace const_refs {
+  const v16qi &ref_normal_v4si = normal_v4si;
+  const v16qi &ref_const_v4si = const_v4si;
+  const v16qi &ref_normal_v4si_ptr = *normal_v4si_ptr;
+  const v16qi &ref_const_v4si_ptr = *const_v4si_ptr;
+  const v16qi &ref_normal_v4si_ref = normal_v4si_ref;
+  const v16qi &ref_const_v4si_ref = const_v4si_ref;
+
+  const v16qi &ref_normal_v16qi = normal_v16qi;
+  const v16qi &ref_const_v16qi = const_v16qi;
+  const v16qi &ref_normal_v16qi_ptr = *normal_v16qi_ptr;
+  const v16qi &ref_const_v16qi_ptr = *const_v16qi_ptr;
+  const v16qi &ref_normal_v16qi_ref = normal_v16qi_ref;
+  const v16qi &ref_const_v16qi_ref = const_v16qi_ref;
+}
+
+#if __cplusplus >= 201103L
+namespace const_rvalue_refs {
+  const v16qi &&ref_normal_v4si = normal_v4si;
+  const v16qi &&ref_const_v4si = const_v4si;
+  const v16qi &&ref_normal_v4si_ptr = *normal_v4si_ptr;
+  const v16qi &&ref_const_v4si_ptr = *const_v4si_ptr;
+  const v16qi &&ref_normal_v4si_ref = normal_v4si_ref;
+  const v16qi &&ref_const_v4si_ref = const_v4si_ref;
+
+  const v16qi &&ref_normal_v16qi = normal_v16qi; // { dg-error {cannot bind rvalue reference} "" { target c++11 } }
+  const v16qi &&ref_const_v16qi = const_v16qi; // { dg-error {cannot bind rvalue reference} "" { target c++11 } }
+  const v16qi &&ref_normal_v16qi_ptr = *normal_v16qi_ptr; // { dg-error {cannot bind rvalue reference} "" { target c++11 } }
+  const v16qi &&ref_const_v16qi_ptr = *const_v16qi_ptr; // { dg-error {cannot bind rvalue reference} "" { target c++11 } }
+  const v16qi &&ref_normal_v16qi_ref = normal_v16qi_ref; // { dg-error {cannot bind rvalue reference} "" { target c++11 } }
+  const v16qi &&ref_const_v16qi_ref = const_v16qi_ref; // { dg-error {cannot bind rvalue reference} "" { target c++11 } }
+}
+#endif
+
+namespace rvalue_reinterpret_refs {
+  v16qi &ref_normal_v4si = reinterpret_cast<v16qi>(normal_v4si); // { dg-error {cannot bind non-const lvalue} }
+  v16qi &ref_const_v4si = reinterpret_cast<v16qi>(const_v4si); // { dg-error {cannot bind non-const lvalue} }
+}
+
+namespace ref_reinterpret_refs {
+  v16qi &ref_normal_v4si = reinterpret_cast<v16qi &>(normal_v4si);
+  v16qi &ref_const_v4si = reinterpret_cast<v16qi &>(const_cast<v4si &>(const_v4si));
+}