[Bug optimization/13506] tcpsm.c:263: internal compiler error: Segmentation fault (WinXP / Cygwin / arm-elf-gcc 3.4), error also on x86 with GCC 3.3.1

[capiman at clibb dot de]

------- Additional Comments From capiman at clibb dot de  2003-12-30 00:08 -------
I have minimalized the code to one small C file (no includes !) 
and still can reproduce the error:
(perhaps the problem is, that the assembler code is not yet ported,
 but this is still no reason to throw an segmentation fault...)

C File contains:

static inline long __byte_swap4(long val)
{
    asm volatile(
        "mov __tmp_reg__, %A0\n\t"
        "mov %A0, %D0\n\t"
        "mov %D0, __tmp_reg__\n\t"
        "mov __tmp_reg__, %B0\n\t"
        "mov %B0, %C0\n\t"
        "mov %C0, __tmp_reg__\n\t"
        : "=r" (val)
        : "0" (val)
    );
    return(val);
}


 void NutTcpInputOptions(void) 
{
    unsigned long c = 0;

    c = __byte_swap4(c);
}


You can compile and reproduce the error with:

arm-elf-gcc -c -mcpu=arm7tdmi tcpsm.c

Hope it helps !

BTW: I have tried out to feed the same thing into normal GCC 3.3.1 for x86, 
also a version compiled for cygwin and get also an error (segmentation fault 
but a bit another text):

tcpsm.c: In function `__byte_swap4':
tcpsm.c:2: internal compiler error: in print_operand, at 
config/i386/i386.c:6904




-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|tcpsm.c:263: internal       |tcpsm.c:263: internal
                   |compiler error: Segmentation|compiler error: Segmentation
                   |fault (WinXP / Cygwin / arm-|fault (WinXP / Cygwin / arm-
                   |elf-gcc 3.4)                |elf-gcc 3.4), error also on
                   |                            |x86 with GCC 3.3.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13506