xref: /llvm-project/clang/test/CodeGen/catch-alignment-assumption-ignorelist.c (revision 6ed21fc515230ac2ea459d8aa90566e9a467bbb0) 
1 // RUN: %clang_cc1 -fsanitize=alignment -fsanitize-recover=alignment -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_alignment_assumption" --check-prefixes=CHECK
2 
3 // CHECK-LABEL: @baseline
baseline(void * x)4 void *baseline(void *x) {
5   // CHECK: call void @__ubsan_handle_alignment_assumption(
6   return __builtin_assume_aligned(x, 1);
7 }
8 
9 // CHECK-LABEL: ignorelist_0
ignorelist_0(void * x)10 __attribute__((no_sanitize("undefined"))) void *ignorelist_0(void *x) {
11   return __builtin_assume_aligned(x, 1);
12 }
13 
14 // CHECK-LABEL: ignorelist_1
ignorelist_1(void * x)15 __attribute__((no_sanitize("alignment"))) void *ignorelist_1(void *x) {
16   return __builtin_assume_aligned(x, 1);
17 }
18 
19 // CHECK-LABEL: dont_ignore_volatile_ptrs
dont_ignore_volatile_ptrs(void * volatile x)20 void *dont_ignore_volatile_ptrs(void * volatile x) {
21   // CHECK: call void @__ubsan_handle_alignment_assumption(
22   return __builtin_assume_aligned(x, 1);
23 }
24 
25 // CHECK-LABEL: ignore_volatiles
ignore_volatiles(volatile void * x)26 void *ignore_volatiles(volatile void * x) {
27   return __builtin_assume_aligned(x, 1);
28 }
29 
30 // CHECK-LABEL: ignore_array_volatiles
ignore_array_volatiles()31 void *ignore_array_volatiles() {
32   volatile int arr[] = {1};
33   return __builtin_assume_aligned(arr, 4);
34 }
35