[Bug tree-optimization/118266] [15 Regression] ICE in maybe_record_trace_start, at dwarf2cfi.cc:2591 by r15-5863-g5ab3f091b3eb42

[hjl.tools at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118266

--- Comment #11 from H.J. Lu <hjl.tools at gmail dot com> ---
A smaller testcase:

---
void *xmalloc();
void free(void *);
typedef struct {
  int a;
  int b;
  int c;
} mystruct;
int main_j;
int
main()
{
  mystruct *m = (mystruct *)xmalloc(), *mref = m;
#pragma acc enter data copyin(m[1])
  for (int i; i < 9; i++) {
#pragma acc parallel
    for (; main_j;)
      ;
#pragma acc parallel loop copy(mref->b, m->c)
    for (main_j = 0; main_j < 4; main_j++)
      ;
  }
#pragma acc data copyout(m[ : 1])
  free(m);
}
---