| // RUN: %clang_cc1 -triple i386-pc-linux-gnu -emit-llvm < %s| FileCheck %s |
| |
| typedef __WCHAR_TYPE__ wchar_t; |
| typedef __SIZE_TYPE__ size_t; |
| |
| void *memcpy(void *, void const *, size_t); |
| |
| // CHECK: @test1 |
| // CHECK: call void @llvm.memset.p0i8.i32 |
| // CHECK: call void @llvm.memset.p0i8.i32 |
| // CHECK: call void @llvm.memcpy.p0i8.p0i8.i32 |
| // CHECK: call void @llvm.memmove.p0i8.p0i8.i32 |
| // CHECK-NOT: __builtin |
| // CHECK: ret |
| int test1(int argc, char **argv) { |
| unsigned char a = 0x11223344; |
| unsigned char b = 0x11223344; |
| __builtin_bzero(&a, sizeof(a)); |
| __builtin_memset(&a, 0, sizeof(a)); |
| __builtin_memcpy(&a, &b, sizeof(a)); |
| __builtin_memmove(&a, &b, sizeof(a)); |
| return 0; |
| } |
| |
| // rdar://9289468 |
| |
| // CHECK: @test2 |
| // CHECK: call void @llvm.memcpy.p0i8.p0i8.i32 |
| char* test2(char* a, char* b) { |
| return __builtin_memcpy(a, b, 4); |
| } |
| |
| // CHECK: @test3 |
| // CHECK: call void @llvm.memset |
| void test3(char *P) { |
| __builtin___memset_chk(P, 42, 128, 128); |
| } |
| |
| // CHECK: @test4 |
| // CHECK: call void @llvm.memcpy |
| void test4(char *P, char *Q) { |
| __builtin___memcpy_chk(P, Q, 128, 128); |
| } |
| |
| // CHECK: @test5 |
| // CHECK: call void @llvm.memmove |
| void test5(char *P, char *Q) { |
| __builtin___memmove_chk(P, Q, 128, 128); |
| } |
| |
| // CHECK: @test6 |
| // CHECK: call void @llvm.memcpy |
| int test6(char *X) { |
| return __builtin___memcpy_chk(X, X, 42, 42) != 0; |
| } |
| |
| // CHECK: @test7 |
| // PR12094 |
| int test7(int *p) { |
| struct snd_pcm_hw_params_t* hwparams; // incomplete type. |
| |
| // CHECK: call void @llvm.memset{{.*}} align 4 {{.*}}256, i1 false) |
| __builtin_memset(p, 0, 256); // Should be alignment = 4 |
| |
| // CHECK: call void @llvm.memset{{.*}} align 1 {{.*}}256, i1 false) |
| __builtin_memset((char*)p, 0, 256); // Should be alignment = 1 |
| |
| __builtin_memset(hwparams, 0, 256); // No crash alignment = 1 |
| // CHECK: call void @llvm.memset{{.*}} align 1{{.*}}256, i1 false) |
| } |
| |
| // <rdar://problem/11314941> |
| // Make sure we don't over-estimate the alignment of fields of |
| // packed structs. |
| struct PS { |
| int modes[4]; |
| } __attribute__((packed)); |
| struct PS ps; |
| void test8(int *arg) { |
| // CHECK: @test8 |
| // CHECK: call void @llvm.memcpy{{.*}} align 4 {{.*}} align 1 {{.*}} 16, i1 false) |
| __builtin_memcpy(arg, ps.modes, sizeof(struct PS)); |
| } |
| |
| __attribute((aligned(16))) int x[4], y[4]; |
| void test9() { |
| // CHECK: @test9 |
| // CHECK: call void @llvm.memcpy{{.*}} align 16 {{.*}} align 16 {{.*}} 16, i1 false) |
| __builtin_memcpy(x, y, sizeof(y)); |
| } |
| |
| wchar_t dest; |
| wchar_t src; |
| |
| // CHECK-LABEL: @test10 |
| // FIXME: Consider lowering these to llvm.memcpy / llvm.memmove. |
| void test10() { |
| // CHECK: call i32* @wmemcpy(i32* @dest, i32* @src, i32 4) |
| __builtin_wmemcpy(&dest, &src, 4); |
| |
| // CHECK: call i32* @wmemmove(i32* @dest, i32* @src, i32 4) |
| __builtin_wmemmove(&dest, &src, 4); |
| } |
| |
| // CHECK-LABEL: @test11 |
| void test11() { |
| typedef struct { int a; } b; |
| int d; |
| b e; |
| // CHECK: call void @llvm.memcpy{{.*}}( |
| memcpy(&d, (char *)&e.a, sizeof(e)); |
| } |
| |
| // CHECK-LABEL: @test12 |
| extern char dest_array[]; |
| extern char src_array[]; |
| void test12() { |
| // CHECK: call void @llvm.memcpy{{.*}}( |
| memcpy(&dest_array, &dest_array, 2); |
| } |