Emit extern_weak when needed.
- PR3629.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65203 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/global-decls.c b/test/CodeGen/global-decls.c
new file mode 100644
index 0000000..b0e35bd
--- /dev/null
+++ b/test/CodeGen/global-decls.c
@@ -0,0 +1,22 @@
+// RUN: clang -arch i386 -emit-llvm -o %t %s &&
+
+// RUN: grep '@g0_ext = extern_weak global i32' %t &&
+extern int g0_ext __attribute__((weak));
+// RUN: grep 'declare extern_weak i32 @g1_ext()' %t &&
+extern int __attribute__((weak)) g1_ext (void);
+
+// RUN: grep '@g0_common = weak global i32' %t &&
+int g0_common __attribute__((weak));
+
+// RUN: grep '@g0_def = weak global i32' %t &&
+int g0_def __attribute__((weak)) = 52;
+// RUN: grep 'define weak i32 @g1_def()' %t &&
+int __attribute__((weak)) g1_def (void) {}
+
+// Force _ext references
+void f0() {
+ int a = g0_ext;
+ int b = g1_ext();
+}
+
+// RUN: true