Improve merging of function declarations. Specifically:

  - When we are declaring a function in local scope, we can merge with
    a visible declaration from an outer scope if that declaration
    refers to an entity with linkage. This behavior now works in C++
    and properly ignores entities without linkage.
  - Diagnose the use of "static" on a function declaration in local
    scope.
  - Diagnose the declaration of a static function after a non-static
    declaration of the same function.
  - Propagate the storage specifier to a function declaration from a
    prior declaration (PR3425)
  - Don't name-mangle "main"



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65360 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 0 deletions

diff --git a/test/Sema/function.c b/test/Sema/function.c
index ff78e719bb..a1d7137796 100644
--- a/test/Sema/function.c
+++ b/test/Sema/function.c
@@ -53,3 +53,8 @@ void f0_3137() {
 void f1_3137() {
   int (*fp)(void) = g0_3137;
 }
+
+void f1static() {
+  static void f2static(int); // expected-error{{function declared in block scope cannot have 'static' storage class}}
+  register void f2register(int); // expected-error{{illegal storage class on function}}
+}