Return QualType() when a too large array is attempting to be created. This

prevents further errors and some overflows in size calculations.
One overflow was previously triggering an assert.

llvm-svn: 181970

1 files changed, 10 insertions, 3 deletions

diff --git a/clang/test/Sema/offsetof-64.c b/clang/test/Sema/offsetof-64.c
index 1cabec9842f..fb3d6e98d1c 100644
--- a/clang/test/Sema/offsetof-64.c
+++ b/clang/test/Sema/offsetof-64.c
@@ -1,15 +1,22 @@
 // RUN: %clang_cc1 -fsyntax-only -verify %s -triple x86_64-linux-gnu
-// expected-no-diagnostics
 
 // PR15216
 // Don't crash when taking computing the offset of structs with large arrays.
 const unsigned long Size = (1l << 62);
 
-struct Chunk {
+struct Chunk1 {
   char padding[Size];
   char more_padding[1][Size];
   char data;
 };
 
-int test1 = __builtin_offsetof(struct Chunk, 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}}