1 // RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-nacl -emit-llvm -o - %s | FileCheck %s
2 // RUN: %clang_cc1 -std=c++11 -triple=x86_64-unknown-linux-gnux32 -emit-llvm -o - %s | FileCheck %s
3 
4 struct test_struct {};
5 typedef int test_struct::* test_struct_mdp;
6 typedef int (test_struct::*test_struct_mfp)();
7 
8 // CHECK-LABEL: define i32 @{{.*}}f_mdp{{.*}}(i32 %a)
9 test_struct_mdp f_mdp(test_struct_mdp a) { return a; }
10 
11 // CHECK-LABEL: define {{.*}} @{{.*}}f_mfp{{.*}}(i64 %a.coerce)
12 test_struct_mfp f_mfp(test_struct_mfp a) { return a; }
13 
14 // A struct with <= 12 bytes before a member data pointer should still
15 // be allowed in registers, since the member data pointer is only 4 bytes.
16 // CHECK-LABEL: define void @{{.*}}f_struct_with_mdp{{.*}}(i64 %a.coerce0, i64 %a.coerce1)
17 struct struct_with_mdp { char *a; char *b; char *c; test_struct_mdp d; };
18 void f_struct_with_mdp(struct_with_mdp a) { (void)a; }
19 
20 struct struct_with_mdp_too_much {
21   char *a; char *b; char *c; char *d; test_struct_mdp e;
22 };
23 // CHECK-LABEL: define void @{{.*}}f_struct_with_mdp_too_much{{.*}}({{.*}} byval {{.*}} %a)
24 void f_struct_with_mdp_too_much(struct_with_mdp_too_much a) {
25   (void)a;
26 }
27 
28 // A struct with <= 8 bytes before a member function pointer should still
29 // be allowed in registers, since the member function pointer is only 8 bytes.
30 // CHECK-LABEL: define void @{{.*}}f_struct_with_mfp_0{{.*}}(i64 %a.coerce0, i32 %a.coerce1)
31 struct struct_with_mfp_0 { char *a; test_struct_mfp b; };
32 void f_struct_with_mfp_0(struct_with_mfp_0 a) { (void)a; }
33 
34 // CHECK-LABEL: define void @{{.*}}f_struct_with_mfp_1{{.*}}(i64 %a.coerce0, i64 %a.coerce1)
35 struct struct_with_mfp_1 { char *a; char *b; test_struct_mfp c; };
36 void f_struct_with_mfp_1(struct_with_mfp_1 a) { (void)a; }
37 
38 // CHECK-LABEL: define void @{{.*}}f_struct_with_mfp_too_much{{.*}}({{.*}} byval {{.*}} %a, i32 %x)
39 struct struct_with_mfp_too_much {
40   char *a; char *b; char *c; test_struct_mfp d;
41 };
42 void f_struct_with_mfp_too_much(struct_with_mfp_too_much a, int x) {
43   (void)a;
44 }
45 
46 /* Struct containing an empty struct */
47 typedef struct { int* a; test_struct x; double *b; } struct_with_empty;
48 
49 // CHECK-LABEL: define void @{{.*}}f_pass_struct_with_empty{{.*}}(i64 %x{{.*}}, double* %x
50 void f_pass_struct_with_empty(struct_with_empty x) {
51   (void) x;
52 }
53 
54 // CHECK-LABEL: define { i64, double* } @{{.*}}f_return_struct_with_empty
55 struct_with_empty f_return_struct_with_empty() {
56   return {0, {}, 0};
57 }
58