Fix PR4386 by implementing gcc's old behaviour (4.2) when initializing
variables with a comparison of a function pointer with 0.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@103253 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/init.c b/test/Sema/init.c
index b9867cf..c2c29ad 100644
--- a/test/Sema/init.c
+++ b/test/Sema/init.c
@@ -131,3 +131,17 @@
// PR5447
const double pr5447 = (0.05 < -1.0) ? -1.0 : 0.0499878;
+// PR4386
+
+// None of these are constant initializers, but we implement GCC's old
+// behaviour of accepting bar and zed but not foo. GCC's behaviour was
+// changed in 2007 (rev 122551), so we should be able to change too one
+// day.
+int PR4386_bar();
+int PR4386_foo() __attribute((weak));
+int PR4386_zed();
+
+int PR4386_a = ((void *) PR4386_bar) != 0;
+int PR4386_b = ((void *) PR4386_foo) != 0; // expected-error{{initializer element is not a compile-time constant}}
+int PR4386_c = ((void *) PR4386_zed) != 0;
+int PR4386_zed() __attribute((weak));