The address of a TLS var is not compile-time constant (PR13720)

This makes Clang produce an error for code such as:

  __thread int x;
  int *p = &x;

The lvalue of a thread-local variable cannot be evaluated at compile
time.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162835 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 0 deletions

diff --git a/test/Sema/init.c b/test/Sema/init.c
index 81a665dc62..ee3e256b58 100644
--- a/test/Sema/init.c
+++ b/test/Sema/init.c
@@ -157,3 +157,10 @@ int PR4386_zed() __attribute((weak));
 typedef char strty[10];
 struct vortexstruct { strty s; };
 struct vortexstruct vortexvar = { "asdf" };
+
+// PR13720
+__thread int thread_int;
+int *thread_int_ptr = &thread_int; // expected-error{{initializer element is not a compile-time constant}}
+void f() {
+  int *p = &thread_int; // This is perfectly fine, though.
+}