middle-end/94216 fix another build_fold_addr_expr use

2020-03-19  Richard Biener  <rguenther@suse.de>

	PR middle-end/94216
	* fold-const.c (fold_binary_loc): Avoid using
	build_fold_addr_expr when we really want an ADDR_EXPR.

	* g++.dg/torture/pr94216.C: New testcase.

1 files changed, 45 insertions, 0 deletions

diff --git a/gcc/testsuite/g++.dg/torture/pr94216.C b/gcc/testsuite/g++.dg/torture/pr94216.C
new file mode 100644
index 0000000..e67239de9
--- /dev/null
+++ b/gcc/testsuite/g++.dg/torture/pr94216.C
@@ -0,0 +1,45 @@
+// { dg-do compile }
+// { dg-additional-options "-g" }
+
+template <int _Nm> struct A { typedef int _Type[_Nm]; };
+template <int _Nm> struct B {
+    typename A<_Nm>::_Type _M_elems;
+    void operator[](int) { int a = *_M_elems; }
+};
+class C {
+    struct D {
+	using type = int *;
+    };
+
+public:
+    using pointer = D::type;
+};
+class F {
+public:
+    using pointer = C::pointer;
+    F(pointer);
+};
+struct G {
+    int data;
+};
+template <int MaxDimensions> struct H {
+    using dimensions_t = B<MaxDimensions>;
+    dimensions_t dimensions;
+    G mem;
+};
+template <int MaxDimensions, typename Allocator, typename DimT, typename AlignT>
+H<MaxDimensions> alloc_view(int, DimT, AlignT, Allocator) {
+    H<MaxDimensions> b;
+    b.dimensions[0];
+    return b;
+}
+namespace memory {
+    template <typename> using DynMdView = H<6>;
+}
+class I {
+    I();
+    memory::DynMdView<void> m_view;
+    F m_memory;
+};
+int c, d, e;
+I::I() : m_view(alloc_view<6>(c, d, e, [] {})), m_memory(&m_view.mem.data) {}