1 files changed, 22 insertions, 0 deletions
diff --git a/test/Sema/offsetof-64.c b/test/Sema/offsetof-64.c
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+++ b/test/Sema/offsetof-64.c
@@ -0,0 +1,22 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s -triple x86_64-linux-gnu
+
+// PR15216
+// Don't crash when taking computing the offset of structs with large arrays.
+const unsigned long Size = (1l << 60);
+
+struct Chunk1 {
+  char padding[Size];
+  char more_padding[1][Size];
+  char data;
+};
+
+int test1 = __builtin_offsetof(struct Chunk1, data);
+
+struct Chunk2 {
+  char padding[Size][Size][Size];  // expected-error 2{{array is too large}}
+  char data;
+};
+
+// FIXME: Remove this error when the constant evaluator learns to
+// ignore bad types.
+int test2 = __builtin_offsetof(struct Chunk2, data);  // expected-error{{initializer element is not a compile-time constant}}