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[Sema] Add tests for weak functions 

I found these checks to be missing, just add some simple cases.

Differential Revision: https://reviews.llvm.org/D47200

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@333283 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jonas Hahnfeld 2018-05-25 15:56:12 +00:00
parent 03bda85557
commit 8def6e8303
1 changed files with 3 additions and 0 deletions
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3
test/Sema/attr-weak.c
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@ -1,7 +1,9 @@
// RUN: %clang_cc1 -verify -fsyntax-only %s
extern int f0() __attribute__((weak));
extern int g0 __attribute__((weak));
extern int g1 __attribute__((weak_import));
int f2() __attribute__((weak));
int g2 __attribute__((weak));
int g3 __attribute__((weak_import)); // expected-warning {{'weak_import' attribute cannot be specified on a definition}}
int __attribute__((weak_import)) g4(void);
@ -11,6 +13,7 @@ void __attribute__((weak_import)) g5(void) {
struct __attribute__((weak)) s0 {}; // expected-warning {{'weak' attribute only applies to variables, functions, and classes}}
struct __attribute__((weak_import)) s1 {}; // expected-warning {{'weak_import' attribute only applies to variables and functions}}
static int f() __attribute__((weak)); // expected-error {{weak declaration cannot have internal linkage}}
static int x __attribute__((weak)); // expected-error {{weak declaration cannot have internal linkage}}
// rdar://9538608