From 570918821a8492048e6ab54955c9864bd6c3e952 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Tue, 2 May 2017 18:30:45 +0000
Subject: Vendor import of clang trunk r301939:
 https://llvm.org/svn/llvm-project/cfe/trunk@301939

---
 test/SemaCXX/constexpr-array-unknown-bound.cpp | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 test/SemaCXX/constexpr-array-unknown-bound.cpp

(limited to 'test/SemaCXX/constexpr-array-unknown-bound.cpp')

diff --git a/test/SemaCXX/constexpr-array-unknown-bound.cpp b/test/SemaCXX/constexpr-array-unknown-bound.cpp
new file mode 100644
index 0000000000000..1d14623719840
--- /dev/null
+++ b/test/SemaCXX/constexpr-array-unknown-bound.cpp
@@ -0,0 +1,25 @@
+// RUN: %clang_cc1 %s -Wno-uninitialized -std=c++1z -fsyntax-only -verify
+
+const extern int arr[];
+constexpr auto p = arr; // ok
+constexpr int f(int i) {return p[i];} // expected-note {{read of dereferenced one-past-the-end pointer}}
+
+constexpr int arr[] {1, 2, 3};
+constexpr auto p2 = arr + 2; // ok
+constexpr int x = f(2); // ok
+constexpr int y = f(3); // expected-error {{constant expression}}
+// expected-note-re@-1 {{in call to 'f({{.*}})'}}
+
+struct A {int m[];} a;
+constexpr auto p3 = a.m; // ok
+constexpr auto p4 = a.m + 1; // expected-error {{constant expression}} expected-note {{constant bound}}
+
+void g(int i) {
+  int arr[i];
+  constexpr auto *p = arr + 2; // expected-error {{constant expression}} expected-note {{constant bound}}
+
+  // FIXME: Give a better diagnostic here. The issue is that computing
+  // sizeof(*arr2) within the array indexing fails due to the VLA.
+  int arr2[2][i];
+  constexpr int m = ((void)arr2[2], 0); // expected-error {{constant expression}}
+}
-- 
cgit v1.2.3