[Bug target/32895] Clobber list isn't working

[wvangulik at xs4all dot nl]

------- Comment #1 from wvangulik at xs4all dot nl  2007-09-12 07:20 -------
Tested this against 4.1.2. The output for the given test case is different
(optimiser removed the useless loading):

/* prologue: frame size=0 */
        push r28
/* prologue end (size=1) */
/* #APP */
        in r28, 0x2F
/* #NOAPP */
/* epilogue: frame size=0 */
        pop r28
        ret

However making the struct volatile (there for forcing it on stack and thus
using Y pointer) generates the requested error:

void test(void)
{
    volatile struct
    {
        int a, b, c, d, e, f;
    } x;

    x.d = 5;
    asm volatile("in r28, 0x2F" : : : "r28");
    x.d = 6;
}

Gives this error

test.c: In function 'test':
test.c:11: error: r28 cannot be used in asm here

------------------------------------------------------
Using gcc version:

Using built-in specs.
Target: avr
Configured with: ../gcc-4.1.2/configure --prefix=/c/WinAVR --target=avr
--enable
-languages=c,c++ --with-dwarf2 --enable-win32-registry=WinAVR-20070525
--disable
-nls --with-gmp=/usr/local --with-mpfr=/usr/local --enable-doc --disable-libssp
Thread model: single
gcc version 4.1.2 (WinAVR 20070525)
-------------------------------------------------------------------

So could it's know to work for 4.1.2. I can't test this against a higher
version at the moment.


-- 

wvangulik at xs4all dot nl changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |wvangulik at xs4all dot nl


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32895