| Issue |
170021
|
| Summary |
-Warray-bounds does not work when indexing outside of bounds via pointer arithmetic instead of subscript operator
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
inicula
|
This code shows no errors when compiled with `-Wall -Wextra -Wpedantic -Werror`:
```cpp
#include <cstdio>
int main()
{
int arr[10] = {1,2,3};
printf("%d\n", *(arr + 10));
}
```
But the indexing operation is optimized away nonetheless (`-O3 -Wall -Wextra -Wpedantic -Werror`):
```asm
main:
push rax
lea rdi, [rip + .L.str]
xor eax, eax
call printf@PLT
xor eax, eax
pop rcx
ret
.L.str:
.asciz "%d\n"
```
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