xref: /aosp_15_r20/external/clang/test/CodeGenCXX/assign-construct-memcpy.cpp (revision 67e74705e28f6214e480b399dd47ea732279e315)
1*67e74705SXin Li // RUN: %clang_cc1 -triple x86_64-apple-darwin12 -emit-llvm -o - -std=c++11 %s -DPOD | FileCheck %s -check-prefix=CHECK-POD
2*67e74705SXin Li // RUN: %clang_cc1 -triple x86_64-apple-darwin12 -emit-llvm -o - -std=c++11 %s | FileCheck %s -check-prefix=CHECK-NONPOD
3*67e74705SXin Li 
4*67e74705SXin Li // Declare the reserved placement operators.
5*67e74705SXin Li typedef __typeof__(sizeof(0)) size_t;
6*67e74705SXin Li void *operator new(size_t, void*) throw();
7*67e74705SXin Li void operator delete(void*, void*) throw();
8*67e74705SXin Li void *operator new[](size_t, void*) throw();
9*67e74705SXin Li void operator delete[](void*, void*) throw();
10*67e74705SXin Li template<typename T> T &&move(T&);
11*67e74705SXin Li 
12*67e74705SXin Li struct foo {
13*67e74705SXin Li #ifndef POD
foofoo14*67e74705SXin Li   foo() {} // non-POD
15*67e74705SXin Li #endif
16*67e74705SXin Li   void *a, *b;
17*67e74705SXin Li   bool c;
18*67e74705SXin Li };
19*67e74705SXin Li 
20*67e74705SXin Li // It is not legal to copy the tail padding in all cases, but if it is it can
21*67e74705SXin Li // yield better codegen.
22*67e74705SXin Li 
test1(void * f,const foo & x)23*67e74705SXin Li foo *test1(void *f, const foo &x) {
24*67e74705SXin Li   return new (f) foo(x);
25*67e74705SXin Li // CHECK-POD: test1
26*67e74705SXin Li // CHECK-POD: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 24, i32 8
27*67e74705SXin Li 
28*67e74705SXin Li // CHECK-NONPOD: test1
29*67e74705SXin Li // CHECK-NONPOD: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 24, i32 8
30*67e74705SXin Li }
31*67e74705SXin Li 
test2(const foo & x)32*67e74705SXin Li foo *test2(const foo &x) {
33*67e74705SXin Li   return new foo(x);
34*67e74705SXin Li // CHECK-POD: test2
35*67e74705SXin Li // CHECK-POD: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 24, i32 8
36*67e74705SXin Li 
37*67e74705SXin Li // CHECK-NONPOD: test2
38*67e74705SXin Li // CHECK-NONPOD: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 24, i32 8
39*67e74705SXin Li }
40*67e74705SXin Li 
test3(const foo & x)41*67e74705SXin Li foo test3(const foo &x) {
42*67e74705SXin Li   foo f = x;
43*67e74705SXin Li   return f;
44*67e74705SXin Li // CHECK-POD: test3
45*67e74705SXin Li // CHECK-POD: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 24, i32 8
46*67e74705SXin Li 
47*67e74705SXin Li // CHECK-NONPOD: test3
48*67e74705SXin Li // CHECK-NONPOD: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 24, i32 8
49*67e74705SXin Li }
50*67e74705SXin Li 
test4(foo && x)51*67e74705SXin Li foo *test4(foo &&x) {
52*67e74705SXin Li   return new foo(x);
53*67e74705SXin Li // CHECK-POD: test4
54*67e74705SXin Li // CHECK-POD: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 24, i32 8
55*67e74705SXin Li 
56*67e74705SXin Li // CHECK-NONPOD: test4
57*67e74705SXin Li // CHECK-NONPOD: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 24, i32 8
58*67e74705SXin Li }
59*67e74705SXin Li 
test5(foo & f,const foo & x)60*67e74705SXin Li void test5(foo &f, const foo &x) {
61*67e74705SXin Li   f = x;
62*67e74705SXin Li // CHECK-POD: test5
63*67e74705SXin Li // CHECK-POD: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 24, i32 8
64*67e74705SXin Li 
65*67e74705SXin Li // CHECK-NONPOD: test5
66*67e74705SXin Li // CHECK-NONPOD: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 17, i32 8
67*67e74705SXin Li }
68*67e74705SXin Li 
69*67e74705SXin Li extern foo globtest;
70*67e74705SXin Li 
test6(foo && x)71*67e74705SXin Li void test6(foo &&x) {
72*67e74705SXin Li   globtest = move(x);
73*67e74705SXin Li // CHECK-POD: test6
74*67e74705SXin Li // CHECK-POD: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 24, i32 8
75*67e74705SXin Li 
76*67e74705SXin Li // CHECK-NONPOD: test6
77*67e74705SXin Li // CHECK-NONPOD: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 17, i32 8
78*67e74705SXin Li }
79*67e74705SXin Li 
80*67e74705SXin Li void byval(foo f);
81*67e74705SXin Li 
test7(const foo & x)82*67e74705SXin Li void test7(const foo &x) {
83*67e74705SXin Li   byval(x);
84*67e74705SXin Li // CHECK-POD: test7
85*67e74705SXin Li // CHECK-POD: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 24, i32 8
86*67e74705SXin Li 
87*67e74705SXin Li // CHECK-NONPOD: test7
88*67e74705SXin Li // CHECK-NONPOD: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}i64 24, i32 8
89*67e74705SXin Li }
90