-te500v2 and packed attribute

[S. Couture & K. Musgrove]

This seem to be a bug, the code generated is byte access only.

# cat test.c



# cat test.c
struct a_packed{
    int data;
} __attribute__((packed));
struct a_unpacked{
    int data;
};
void test_packed(int in)
{  
    struct a_packed * ptr;
    ptr->data = in;
}
void test_unpacked(int in)
{  
    struct a_unpacked * ptr;
    ptr->data = in;
}


# powerpc-linux-gnu-gcc -O2  -te500v2 test.c -c -o test
# powerpc-linux-gnu-objdump -d test

test:     file format elf32-powerpc

Disassembly of section .text:

00000000 <test_packed>:
   0:    54 69 86 3e     rlwinm  r9,r3,16,24,31
   4:    54 60 46 3e     rlwinm  r0,r3,8,24,31
   8:    54 6b c6 3e     rlwinm  r11,r3,24,24,31
   c:    98 69 00 03     stb     r3,3(r9)
  10:    98 09 00 00     stb     r0,0(r9)
  14:    99 29 00 01     stb     r9,1(r9)
  18:    99 69 00 02     stb     r11,2(r9)
  1c:    4e 80 00 20     blr

00000020 <test_unpacked>:
  20:    90 69 00 00     stw     r3,0(r9)
  24:    4e 80 00 20     blr

# powerpc-linux-gnu-gcc -O2  test.c -c -o test
# powerpc-linux-gnu-objdump -d test

test:     file format elf32-powerpc

Disassembly of section .text:

00000000 <test_packed>:
   0:    90 69 00 00     stw     r3,0(r9)
   4:    4e 80 00 20     blr

00000008 <test_unpacked>:
   8:    90 69 00 00     stw     r3,0(r9)
   c:    4e 80 00 20     blr

I had to align the structure to make it work :

struct a_packed{
    int data;
} __attribute__((packed,aligned(4)));


I would consider this a bug.  Is there a better way to fix this then us 
having to go trough all the packed structure definitions in our code?

Thanks/