Emit an error if an array is too large. We're slightly more strict
than GCC 4.2 here when building 32-bit (where GCC will allow
allocation of an array for which we can't get a valid past-the-end
pointer), and emulate its odd behavior in 64-bit where it only allows
63 bits worth of storage in the array. The former is a correctness
issue; the latter is harmless in practice (you wouldn't be able to use
such an array anyway) and helps us pass a GCC DejaGNU test.
Fixes <rdar://problem/8212293>.
llvm-svn: 111338
diff --git a/clang/test/Sema/array-size-64.c b/clang/test/Sema/array-size-64.c
new file mode 100644
index 0000000..f22e8e7
--- /dev/null
+++ b/clang/test/Sema/array-size-64.c
@@ -0,0 +1,7 @@
+// RUN: %clang_cc1 -triple x86_64-apple-darwin -verify %s
+
+void f() {
+ int a[2147483647U][2147483647U]; // expected-error{{array is too large}}
+ int b[1073741825U - 1U][2147483647U];
+ int c[18446744073709551615U/sizeof(int)/2];
+}