Don't warn about unused static functions if they are marked with 
attr constructor or destructor.  Patch by Jean-Daniel Dupas!


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@100870 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/warn-unused-function.c b/test/Sema/warn-unused-function.c
index 095532b..d5e676b 100644
--- a/test/Sema/warn-unused-function.c
+++ b/test/Sema/warn-unused-function.c
@@ -30,3 +30,8 @@
 __attribute__((unused)) static void bar(void);
 void bar(void) { }
 
+__attribute__((constructor)) static void bar2(void);
+void bar2(void) { }
+
+__attribute__((destructor)) static void bar3(void);
+void bar3(void) { }