[Bug middle-end/34921] Misalign stack variable referenced by nested function

[Joey dot ye at intel dot com]

------- Comment #5 from Joey dot ye at intel dot com  2008-01-23 01:45 -------
(In reply to comment #2)
> I bet if you put jj in struct and don't have a nested function, this will be
> the same issue.

Not the same. In fact it passes if not referenced by a nested function. The
root is in tree-nested.c

$ cat nested-3.c
#include <stdio.h>
#include <stdlib.h>
typedef int aligned __attribute__((aligned(16)));
int global;

void
check (int *i)
{
  *i = 20;
  if ((((int) i) & (__alignof__(aligned) - 1)) != 0)
    {
      printf("\nUnalign address (%d): %p!\n",
             __alignof__(aligned), i);
      abort ();
    }
}

void
foo (void)
{
  aligned jj;
  int j2;
  void bar ()
    {
      j2 = -20;
    }
  jj = 0;
  bar ();
  check (&jj);
}

int
main()
{
  foo ();
  return 0;
}
$ diff -p nested-2.c nested-3.c
*** nested-2.c  2008-01-22 14:24:39.000000000 +0800
--- nested-3.c  2008-01-23 09:38:47.000000000 +0800
*************** void
*** 19,27 ****
  foo (void)
  {
    aligned jj;
    void bar ()
      {
!       jj = -20;
      }
    jj = 0;
    bar ();
--- 19,28 ----
  foo (void)
  {
    aligned jj;
+   int j2;
    void bar ()
      {
!       j2 = -20;
      }
    jj = 0;
    bar ();
$ gcc -m32 -o nested-3.exe nested-3.c
$ ./nested-3.exe
$


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34921