[Bug c/89769] New: attribute((aligned(x))) array testcae run error with option -fno-tree-loop-im

[xuzheliang at huawei dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89769

            Bug ID: 89769
           Summary: attribute((aligned(x))) array testcae  run error with
                    option -fno-tree-loop-im
           Product: gcc
           Version: 7.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: xuzheliang at huawei dot com
  Target Milestone: ---

>>cat pr43783.c
typedef __attribute__((aligned(16)))
struct {
  unsigned long long w[3];
} UINT192;

UINT192 bid_Kx192[32];

extern void abort (void);

int main()
{
  int i = 0;
  unsigned long x = 0;
  for (i = 0; i < 32; ++i)
    bid_Kx192[i].w[1] = i == 1;
  for (i = 0; i < 32; ++i)
    x += bid_Kx192[1].w[1];
  if (x != 32)
    abort ();
  return 0;
}

>>gcc  -O2 pr43783.c  -fno-tree-loop-im -o pr43783.exe
>>./pr43783.exe
Aborted