1 // RUN: %clang_cc1 -triple=x86_64-apple-darwin -emit-llvm -o - %s | FileCheck %s
2 // rdar://11861085
3
4 struct s {
5 char filler [128];
6 volatile int x;
7 };
8
9 struct s gs;
10
foo(void)11 void foo (void) {
12 struct s ls;
13 ls = ls;
14 gs = gs;
15 ls = gs;
16 }
17 // CHECK-LABEL: define{{.*}} void @_Z3foov()
18 // CHECK: %[[LS:.*]] = alloca %struct.s, align 4
19 // CHECK-NEXT: %[[ZERO:.*]] = bitcast %struct.s* %[[LS]] to i8*
20 // CHECK-NEXT: %[[ONE:.*]] = bitcast %struct.s* %[[LS]] to i8*
21 // CHECK-NEXT: call void @llvm.memcpy.{{.*}}(i8* align 4 %[[ZERO]], i8* align 4 %[[ONE]], i64 132, i1 true)
22 // CHECK-NEXT: call void @llvm.memcpy.{{.*}}(i8* align 4 getelementptr inbounds (%struct.s, %struct.s* @gs, i32 0, i32 0, i32 0), i8* align 4 getelementptr inbounds (%struct.s, %struct.s* @gs, i32 0, i32 0, i32 0), i64 132, i1 true)
23 // CHECK-NEXT: %[[TWO:.*]] = bitcast %struct.s* %[[LS]] to i8*
24 // CHECK-NEXT: call void @llvm.memcpy.{{.*}}(i8* align 4 %[[TWO]], i8* align 4 getelementptr inbounds (%struct.s, %struct.s* @gs, i32 0, i32 0, i32 0), i64 132, i1 true)
25
26
27 struct s1 {
28 struct s y;
29 };
30
31 struct s1 s;
32
fee(void)33 void fee (void) {
34 s = s;
35 s.y = gs;
36 }
37 // CHECK-LABEL: define{{.*}} void @_Z3feev()
38 // CHECK: call void @llvm.memcpy.{{.*}}(i8* align 4 getelementptr inbounds (%struct.s1, %struct.s1* @s, i32 0, i32 0, i32 0, i32 0), i8* align 4 getelementptr inbounds (%struct.s1, %struct.s1* @s, i32 0, i32 0, i32 0, i32 0), i64 132, i1 true)
39 // CHECK-NEXT: call void @llvm.memcpy.{{.*}}(i8* align 4 getelementptr inbounds (%struct.s1, %struct.s1* @s, i32 0, i32 0, i32 0, i32 0), i8* align 4 getelementptr inbounds (%struct.s, %struct.s* @gs, i32 0, i32 0, i32 0), i64 132, i1 true)
40
41 struct d : s1 {
42 };
43
44 d gd;
45
gorf(void)46 void gorf(void) {
47 gd = gd;
48 }
49 // CHECK-LABEL: define{{.*}} void @_Z4gorfv()
50 // CHECK: call void @llvm.memcpy.{{.*}}(i8* align 4 getelementptr inbounds (%struct.d, %struct.d* @gd, i32 0, i32 0, i32 0, i32 0, i32 0), i8* align 4 getelementptr inbounds (%struct.d, %struct.d* @gd, i32 0, i32 0, i32 0, i32 0, i32 0), i64 132, i1 true)
51