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