| Issue |
113794
|
| Summary |
[clang] Segmentation fault in loop vectorization cost model during optimization pass
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
cardigan1008
|
When I compiled this code with -O2 flag, it crashed:
```c
#include <stdint.h>
#define UNDEFINED(x) ((x), 0)
long b;
static int64_t j = 1;
static int64_t *k = &j;
static int64_t **l = &k;
int64_t m;
static uint64_t n;
int16_t ***o;
static int64_t ***p = &l;
uint64_t **q;
uint16_t
safe_mod_func_uint16_t_u_u(uint16_t ui1, uint16_t ui2)
{
return
#ifndef UNSAFE
(ui2 == 0) ?
(UNDEFINED(ui1)) :
#endif
(ui1 % ui2);
}
int64_t
safe_mod_func_int64_t_s_s(int64_t si1, int64_t si2)
{
return
#ifndef UNSAFE
((si2 == 0) || ((si1 == INT64_MIN) && (si2 == (-1)))) ?
(UNDEFINED(si1)) :
#endif
(si1 % si2);
}
int a(int, int, int, int, int) {}
long c(int d, int *e) {
switch (d) {
case 9:
return b;
case 8:
return *e;
}
}
long f(int g, long, int h) {
long i = c(g, &h);
return i;
}
int32_t r() { int32_t *s[] = {&k, &m}; }
int32_t t(int32_t *aa) {
uint64_t ab = 2599693332;
uint8_t ac = 142;
for (; n <= 4; n++)
*aa = (safe_mod_func_uint16_t_u_u(
safe_mod_func_int64_t_s_s(a(0, 0, 0, 0, **l + 20) + **l, **q),
***o |= f(**l, 0, ***p)),
**l + ac + ab - -1695273821 + *aa);
}
```
The crash is: clang: error: unable to execute command: Segmentation fault (core dumped)
clang: error: clang frontend command failed due to signal (use -v to see invocation)
Compiler returned: 254
Details can be found here: https://godbolt.org/z/3h9j7W6dG
![]()
_______________________________________________
llvm-bugs mailing list
[email protected]
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
