[Bug bootstrap/92301] bootstrap internal compiler error: Aborted free(): invalid next size (fast)

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92301

--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
Even easier, use the following self-contained test-case:

$ cat /tmp/vect.c
unsigned int m;

struct df_reg_info
{
  unsigned int n_regs;
};

#define N 128

struct df_reg_info a[N];

unsigned int
__attribute__((noipa))
df_count_refs (bool include_defs)
{
  unsigned int regno;
  int size = 0;
  for (regno = 0; regno < m; regno++)
    {
      if (include_defs)
        size += a[regno].n_regs;
    }
  return size;
}

int main(int argc, char **argv)
{
  for (unsigned i = 0; i < N; i++)
  {
    a[i].n_regs = i;
  }

  if (argc == 1)
    m = 17;
  unsigned int r = df_count_refs(true);
  __builtin_printf ("r: %d\n", r);

  if (r != 136)
    __builtin_abort ();

  return 0;
}

$ marxin@marxinbox:/dev/shm/objdir/gcc> g++ /tmp/vect.c -march=haswell -O0 &&
./a.out 
r: 136
marxin@marxinbox:/dev/shm/objdir/gcc> g++ /tmp/vect.c -march=haswell -O3 &&
./a.out 
r: 17
Aborted (core dumped)