1// RUN: %clang_cc1 -triple i386-pc-linux-gnu -emit-llvm < %s| FileCheck %s
2
3// CHECK: @test1
4// CHECK: call void @llvm.memset.p0i8.i32
5// CHECK: call void @llvm.memset.p0i8.i32
6// CHECK: call void @llvm.memcpy.p0i8.p0i8.i32
7// CHECK: call void @llvm.memmove.p0i8.p0i8.i32
8// CHECK-NOT: __builtin
9// CHECK: ret
10int test1(int argc, char **argv) {
11  unsigned char a = 0x11223344;
12  unsigned char b = 0x11223344;
13  __builtin_bzero(&a, sizeof(a));
14  __builtin_memset(&a, 0, sizeof(a));
15  __builtin_memcpy(&a, &b, sizeof(a));
16  __builtin_memmove(&a, &b, sizeof(a));
17  return 0;
18}
19
20// rdar://9289468
21
22// CHECK: @test2
23// CHECK: call void @llvm.memcpy.p0i8.p0i8.i32
24char* test2(char* a, char* b) {
25  return __builtin_memcpy(a, b, 4);
26}
27
28// CHECK: @test3
29// CHECK: call void @llvm.memset
30void test3(char *P) {
31  __builtin___memset_chk(P, 42, 128, 128);
32}
33
34// CHECK: @test4
35// CHECK: call void @llvm.memcpy
36void test4(char *P, char *Q) {
37  __builtin___memcpy_chk(P, Q, 128, 128);
38}
39
40// CHECK: @test5
41// CHECK: call void @llvm.memmove
42void test5(char *P, char *Q) {
43  __builtin___memmove_chk(P, Q, 128, 128);
44}
45
46// CHECK: @test6
47// CHECK: call void @llvm.memcpy
48int test6(char *X) {
49  return __builtin___memcpy_chk(X, X, 42, 42) != 0;
50}
51
52// CHECK: @test7
53// PR12094
54int test7(int *p) {
55  struct snd_pcm_hw_params_t* hwparams;  // incomplete type.
56
57  // CHECK: call void @llvm.memset{{.*}}256, i32 4, i1 false)
58  __builtin_memset(p, 0, 256);  // Should be alignment = 4
59
60  // CHECK: call void @llvm.memset{{.*}}256, i32 1, i1 false)
61  __builtin_memset((char*)p, 0, 256);  // Should be alignment = 1
62
63  __builtin_memset(hwparams, 0, 256);  // No crash alignment = 1
64  // CHECK: call void @llvm.memset{{.*}}256, i32 1, i1 false)
65}
66
67// <rdar://problem/11314941>
68// Make sure we don't over-estimate the alignment of fields of
69// packed structs.
70struct PS {
71  int modes[4];
72} __attribute__((packed));
73struct PS ps;
74void test8(int *arg) {
75  // CHECK: @test8
76  // CHECK: call void @llvm.memcpy{{.*}} 16, i32 1, i1 false)
77  __builtin_memcpy(arg, ps.modes, sizeof(struct PS));
78}
79
80__attribute((aligned(16))) int x[4], y[4];
81void test9() {
82  // CHECK: @test9
83  // CHECK: call void @llvm.memcpy{{.*}} 16, i32 16, i1 false)
84  __builtin_memcpy(x, y, sizeof(y));
85}
86