1 // RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm %s -o - | FileCheck %s
2 
3 // rdar://7309675
4 // PR4678
5 namespace test0 {
6   // test1 should be compmiled to be a varargs function in the IR even
7   // though there is no way to do a va_begin.  Otherwise, the optimizer
8   // will warn about 'dropped arguments' at the call site.
9 
10   // CHECK-LABEL: define i32 @_ZN5test05test1Ez(...)
11   int test1(...) {
12     return -1;
13   }
14 
15   // CHECK: call i32 (...)* @_ZN5test05test1Ez(i32 0)
16   void test() {
17     test1(0);
18   }
19 }
20 
21 namespace test1 {
22   struct A {
23     int x;
24     int y;
25   };
26 
27   void foo(...);
28 
29   void test() {
30     A x;
31     foo(x);
32   }
33   // CHECK-LABEL:    define void @_ZN5test14testEv()
34   // CHECK:      [[X:%.*]] = alloca [[A:%.*]], align 4
35   // CHECK-NEXT: [[TMP:%.*]] = alloca [[A]], align 4
36   // CHECK-NEXT: [[T0:%.*]] = bitcast [[A]]* [[TMP]] to i8*
37   // CHECK-NEXT: [[T1:%.*]] = bitcast [[A]]* [[X]] to i8*
38   // CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[T0]], i8* [[T1]], i64 8, i32 4, i1 false)
39   // CHECK-NEXT: [[T0:%.*]] = bitcast [[A]]* [[TMP]] to i64*
40   // CHECK-NEXT: [[T1:%.*]] = load i64* [[T0]], align 1
41   // CHECK-NEXT: call void (...)* @_ZN5test13fooEz(i64 [[T1]])
42   // CHECK-NEXT: ret void
43 }
44